Podcasts about Zooplankton

Heterotrophic protistan or metazoan members of the plankton ecosystem

  • 38PODCASTS
  • 43EPISODES
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  • May 8, 2024LATEST
Zooplankton

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Best podcasts about Zooplankton

Latest podcast episodes about Zooplankton

Curiosity Daily
Gossip, Zooplankton, School Bus Science

Curiosity Daily

Play Episode Listen Later May 8, 2024 10:02


Today, you'll learn about the potential positive power of gossip, how climate change is making zooplankton in Lake Erie confused, and a surprising connection between new school buses and student performance in school. Gossip “Can't Stand Gossip? Let's Talk, New Research Suggests.” by Emily C. Nunez. 2024. “Explaining the evolution of gossip.” by Xinyue Pan, et al. 2024. “Who Gossips and How in Everyday Life?” by Megan L. Robbins, et al. 2019. Zooplankton “In Lake Erie, climate change scrambles zooplankton seasonal presence.” by Tatyana Woodall. 2024. “Zooplankton Facts.” n.a. 2024. “Biotic and thermal drivers alter zooplankton phenology in western Lake Erie.” by Jenna Bailey & James M. Hood. 2024. School Bus Science “Could riding older school buses hinder student performance?” University of Michigan. 2024. “EPA Clean School Bus Rebate Program Offers $500 Million in Funding.” n.a. 2023. “School Bus Rebate Program and Student Educational Performance Test Scores.” by Meredith Pedde, PhD, et al. 2024. Follow Curiosity Daily on your favorite podcast app to get smarter with Calli and Nate — for free! Still curious? Get exclusive science shows, nature documentaries, and more real-life entertainment on discovery+! Go to https://discoveryplus.com/curiosity to start your 7-day free trial. discovery+ is currently only available for US subscribers. Hosted on Acast. See acast.com/privacy for more information.

Speak Up For The Ocean Blue
Arctic Meltdown: Impacts on Wildlife and Climate Change

Speak Up For The Ocean Blue

Play Episode Listen Later Feb 22, 2024 22:46


Andrew Lewin delves into the significant changes occurring in the Arctic due to climate change. He highlights the drastic ice melt and its impact on the Arctic environment and its inhabitants. Andrew emphasizes the importance of understanding these changes and the need to take action to protect the ocean. Tune in to explore how animals in the Arctic are adapting to survive amidst the evolving conditions, and reflect on the resilience of both animals and the ocean in the face of environmental challenges. Link to article: https://news.mongabay.com/2024/02/the-new-arctic-amid-record-heat-ecosystems-morph-and-wildlife-struggle/ Follow a career in conservation: https://www.conservation-careers.com/online-training/ Use the code SUFB to get 33% off courses and the careers program.   Facebook Group: https://bit.ly/3NmYvsI Connect with Speak Up For Blue: Website: https://bit.ly/3fOF3Wf Instagram: https://bit.ly/3rIaJSG TikTok: https://www.tiktok.com/@speakupforblue Twitter: https://bit.ly/3rHZxpc YouTube: www.speakupforblue.com/youtube Climate change is significantly impacting the Arctic, leading to the melting of ice and altering habitats for animals. The once pristine and frozen landscape of the Arctic is rapidly transforming due to the effects of climate change. In the podcast, host Andrew Lewin highlights the alarming consequences of this change, emphasizing the urgent need for action to protect this fragile ecosystem. The melting of ice in the Arctic is a central theme in the episode, with Andrew discussing how the loss of ice is affecting the physical structure of the region. The melting ice is not only reducing habitat for animals like polar bears, walruses, and seals but also exposing pollutants and toxins that were previously trapped in the ice. This release of pollutants into the water further threatens the delicate balance of the Arctic ecosystem. As the ice recedes and habitats change, animals in the Arctic are forced to adapt to survive. Polar bears, apex predators of the region, are facing challenges as their traditional hunting grounds on sea ice diminish. The scarcity of sea ice is pushing polar bears to hunt land animals and raid seabird colonies for food, altering their behavior and potentially impacting their population dynamics. Moreover, the changing Arctic environment is attracting new species from the south, introducing diseases and competition for resources. The emergence of new pathogens like the H5N1 avian flu poses a significant threat to Arctic species with little immunity to such diseases. The host emphasizes the importance of genetic diversity in populations to withstand these challenges and highlights the potential loss of species if adaptation is not successful. In conclusion, the episode underscores the critical need to address climate change and reduce the reliance on fossil fuels to mitigate the impacts on the Arctic and its inhabitants. Andrew Lewin's passionate plea for action resonates throughout the episode, urging listeners to take steps to protect the Arctic and preserve its unique ecosystem for future generations. The loss of ice in the Arctic is having a profound impact on the food chain, leading to significant adaptations in the behavior of animals like polar bears. As highlighted in the podcast episode, the melting ice is causing polar bears to shift their hunting habits from seals to land animals. This change in prey preference is a direct result of the diminishing sea ice, which traditionally served as a platform for polar bears to hunt seals. With the reduction of sea ice, polar bears are finding it increasingly challenging to access their primary food source, seals. As a result, they are turning to alternative food options available on land, such as seabird colonies. This shift in diet is a clear adaptation to the changing Arctic environment, where the traditional hunting grounds are no longer as accessible or abundant. The podcast episode emphasizes how this alteration in the polar bear's diet is just one example of the ripple effects caused by the melting ice in the Arctic. The disruption of the food chain not only impacts polar bears but also influences the populations of other species within the ecosystem. As polar bears start targeting land animals for sustenance, it creates a domino effect on the entire food web, potentially leading to changes in population dynamics and species interactions. This adaptation by polar bears underscores the urgent need for action to address climate change and its effects on Arctic ecosystems. The loss of ice is not just a physical change in the environment; it is fundamentally altering the way animals like polar bears survive and thrive in their natural habitat. By understanding and highlighting these adaptations, we can better comprehend the far-reaching consequences of climate change and the importance of taking immediate steps to mitigate its impact on Arctic wildlife. Urgent Action Needed to Reduce Fossil Fuel Production for Arctic Ecosystems The podcast episode highlights the urgent need for action to reduce fossil fuel production to mitigate the devastating effects of climate change on Arctic ecosystems and wildlife. The Arctic region is undergoing rapid transformation due to the melting of ice and the warming climate, leading to significant impacts on the habitat and survival of various species. Impact on Arctic Wildlife Loss of Habitat: The melting ice in the Arctic is causing a significant loss of habitat for animals like polar bears, walruses, and seals. These animals rely on ice floes for resting, hunting, and breeding, but as the ice melts, their habitat diminishes, leading to increased competition for resources and reduced survival rates. Altered Food Chains: The disappearance of sea ice is disrupting the food chains in the Arctic. Species like polar bears are shifting their hunting behaviors, targeting land animals and seabird colonies due to the changing availability of prey. This alteration in food sources can lead to population declines and increased competition among species. Introduction of Diseases: The warming Arctic is attracting southern species, bringing new pathogens and diseases to the region. The lack of immunity in isolated Arctic species makes them vulnerable to infections, leading to potential population declines and genetic diversity loss. Call to Action Reduce Fossil Fuel Production: The episode emphasizes the critical need to reduce fossil fuel production to combat climate change. The main culprit in driving global warming is the burning of oil, gas, and coal, which continues to increase carbon emissions and exacerbate the impacts on Arctic ecosystems. Global Efforts: Despite calls for action and awareness of the consequences, global carbon emissions from fossil fuels reached record highs in 2023. Urgent and coordinated efforts are required at the international level to transition to renewable energy sources and reduce reliance on fossil fuels. Individual Action: The host encourages listeners to take action by influencing government policies, lobbying for environmental regulations, and supporting organizations dedicated to climate change mitigation. Individual actions, when combined, can contribute to significant changes in reducing fossil fuel consumption and protecting Arctic ecosystems. Conclusion The urgency to reduce fossil fuel production is paramount to safeguarding Arctic ecosystems and wildlife from the detrimental effects of climate change. By taking immediate action to transition to sustainable energy sources and advocating for environmental protection, individuals can play a crucial role in preserving the fragile Arctic environment for future generations.

That's what I call Science!
Episode 208: Zooming in on Zooplankton

That's what I call Science!

Play Episode Listen Later Aug 27, 2023 27:50


Sylvie King is a master's student at the Institute of Marine and Antarctic Science (IMAS), in affiliation with the Australian Antarctic Partnership Program (AAPP) and the Integrated Marine Observing System (IMOS). In this episode we dive deep into her world researching and modelling zooplankton in the southern ocean. What are zooplankton and why should we be continuously monitoring them? What is it like spending months on a research vessel in the southern ocean, never seeing land? How can we bring Antarctic research back home and make the science done down there accessible? Learn all this and more in this week's episode with Sylvie!Show theme music: Kevin MacLeodHost: Olly Dove (@olly_dove)Co-Host: Katya Bandow (@katyabandow)Production:  Hannah Moore (@HannahCMoore) Media & Promotion: Katya Bandow (@katyabandow)

WXPR Field Notes
Field Notes: Spiny Water Fleas

WXPR Field Notes

Play Episode Listen Later Jun 13, 2023 4:59


Spiny water fleas are aquatic arthropods called zooplankton. Zooplankton are small shrimp-like creatures, and most of them survive by eating phytoplankton, the microscopic photosynthetic algae at the bottom of the food chain in lakes.

Beyond Blathers
Plankton with Joe Hanson

Beyond Blathers

Play Episode Listen Later Jun 5, 2023 47:06


This week we are so excited to be joined by Dr. Joe Hanson of PBS's Be Smart, one of our favourite science communication YouTube channels! We got to talk to Joe about plankton, their epic daily migration, his experience making Be Smart, and so much more!  Make sure to check out Be Smart on YouTube and watch the episode on diel migration here. And follow Joe on Twitter and Instagram!  If you'd like to support the show please check out our Patreon to make a monthly donation and receive stickers and prints in the mail each month! And you can take a look at our merch store over on Etsy where we sell adorable animal stickers and postcards. Don't forget to subscribe and leave us a rating and review. To stay up to date and see our weekly episode illustrations, make sure to follow us on Instagram and Twitter. And don't forget to check out our TikTok! Beyond Blathers is hosted and produced by Olivia deBourcier and Sofia Osborne, with art by Olivia deBourcier and music by Max Hoosier. This podcast is not associated with Animal Crossing or Nintendo, we just love this game.

For the Love of Nature
They're on a Boat: A NOAA Adventure Pt. 4

For the Love of Nature

Play Episode Listen Later May 23, 2023 5:03 Transcription Available


In this mini episode of For the Love of Nature, Allison Black and her guest, Amanda Jacobson, talk about what it's like to work as a biological science technician and plankton lab technician on one of NOAA's ship. Amanda explains how she collects plankton samples and shares some of the surprising creatures they've found. She also talks about the challenges of working on a ship, such as adjusting to the nocturnal schedule. Tune in to learn about the fascinating world of plankton and what it's really like to work on a ship.Support the show

Friends of Kootenay Lake Podcast Series: Voices of the Lake
Diving Deep: Uncovering the Mystery of Microplastics in Freshwater Lakes

Friends of Kootenay Lake Podcast Series: Voices of the Lake

Play Episode Listen Later Jan 31, 2023 42:53


Guest: Natasha Klasios, PhD Candidate at the University of British Columbia  Host: Joelle Burnie Keywords: Microplastics, Freshwater Lakes, Aquatic Ecosystems, Marine Environments, Research, Plastic Pollution, Wastewater Effluent, Runoff, Fibers, Polyester, Contaminants, Water Samples, Chemical Digestion, Filters, Zooplankton, Food Chain, Recreation, Zero-waste, Reuse Topics: What are Microplastics?; How Microplastics end up in Freshwater Lakes; Concerns Associated with Microplastics; Sampling Microplastics in Eight BC Lakes; Findings from Natasha's Research; How to Limit our Use of Microplastics; Removing Microplastics from Lake Environments  Music: "Aboota" Jay Danley featuring Rich Brown. YouTube. Special thanks to our funders the Regional District of Central Kootenay and the FortisBC. 

Earth Wise
Less Phytoplankton In The Gulf Of Maine | Earth Wise

Earth Wise

Play Episode Listen Later Jul 20, 2022 2:00


Phytoplankton, also known as microalgae, are the base of the marine food web and also play a key role in removing carbon dioxide from the air.  They are eaten by primary consumers like zooplankton, small fish, and crustaceans.  Phytoplankton, like land plants, absorb carbon dioxide from the atmosphere and use photosynthesis to grow.  Then they […]

Wszechnica.org.pl - Nauka
266. Zooplankton w Arktyce - Anna Wielgopolan

Wszechnica.org.pl - Nauka

Play Episode Listen Later Apr 14, 2022 24:13


Najmniejsze organizmy zwierzęce, które ciężko obserwować gołym okiem - czy najważniejsze zwierzęta w Arktyce? Niezdolne do przeciwstawienia się ruchom wody, w której żyją, czy uczestnicy największej migracji na planecie? Do zooplanktonu pasują pozornie skrajnie odmienne opisy. Poznaj sekrety zooplanktonu arktycznego! Czym jest plankton, czym zooplankton? Jakie ma specjalne właściwości w Arktyce, jakie przystosowania żeby przetrwać w tych ekstremalnych warunkach i jakie ma znaczenie w tym specyficznym ekosystemie? Dowiemy się też jakie są zależności między zooplanktonem a zmianami klimatu. Anna Wielgopolan - starszy specjalista ds. komunikacji naukowej i edukacji w Instytut Geofizyki PAN. Instytut Geofizyki PANUniwersytet Warszawski. Webinarium poprowadzone w ramach projektu EDU-ARCTIC2 - od badań polarnych do naukowej pasji realizowanego przez Instytut Geofizyki PAN i korzystającego z dofinansowania otrzymanego od Islandii, Liechtensteinu i Norwegii w ramach funduszy EOG. Strona projektu EDU-ARCTIC2: https://edu-arctic2.eu/ Znajdź nas: https://www.facebook.com/WszechnicaFWW1/

63 Degrees North
The Detectives: Hunting toxic chemicals in the Arctic

63 Degrees North

Play Episode Listen Later Mar 30, 2022 23:33


Baby grey seals. Polar bears. Zooplankton on painkillers. How do toxic chemicals and substances end up in Arctic animals — and as it happens, native people, too? Our guests on today's show are Bjørn Munro Jenssen, an ecotoxicologist at NTNU, Jon Øyvind Odland, a professor of global health at NTNU and a professor of international health at UiT —The Arctic University of Norway, and Ida Beathe Øverjordet, a researcher at SINTEF.One of the most useful websites on arctic pollution is the Arctic Monitoring and Assessment Programme, AMAP. Rachel Carson's book is Silent Spring.Here's a selection of articles from today's episode:Sørmo, E.G., Salmer, M.P., Jenssen, B.M., Hop, H., Bæk, K., Kovacs, K.M., Lydersen, C., Falk-Petersen, S., Gabrielsen, G.W., Lie, E. and Skaare, J.U. (2006), Biomagnification of polybrominated diphenyl ether and hexabromocyclododecane flame retardants in the polar bear food chain in Svalbard, Norway. Environmental Toxicology and Chemistry, 25: 2502-2511. https://doi.org/10.1897/05-591RBourgeon, Sophie; Riemer, Astrid Kolind; Tartu, Sabrina; Aars, Jon; Polder, Anuschka; Jenssen, Bjørn Munro; Routti, Heli Anna Irmeli. (2017) Potentiation of ecological factors on the disruption of thyroid hormones by organo-halogenated contaminants in female polar bears (Ursus maritimus) from the Barents Sea. Environmental Research. vol. 15Nuijten, RJM; Hendriks, AJ; Jenssen, Bjørn Munro; Schipper, AM. (2016) Circumpolar contaminant concentrations in polar bears (Ursus maritimus) and potential population-level effects. Environmental Research. vol. 151.Chashchin, Valery; Kovshov, Aleksandr A.; Thomassen, Yngvar; Sorokina, Tatiana; Gorbanev, Sergey A.; Morgunov, Boris; Gudkov, Andrey B.; Chashchin, Maxim; Sturlis, Natalia V.; Trofimova, Anna; Odland, Jon Øyvind; Nieboer, Evert. (2020) Health risk modifiers of exposure to persistent pollutants among indigenous peoples of Chukotka. International Journal of Environmental Research and Public Health (IJERPH). vol. 17 (1). See acast.com/privacy for privacy and opt-out information.

Weird Animal Facts: Explicit
63. Whales

Weird Animal Facts: Explicit

Play Episode Listen Later Feb 15, 2022 24:45 Transcription Available


"Whale-come" to the glorious porpoise of World Whale Day! On February 20, 2022 we celebrate all whales! And yes, technically dolphins are whales. But World Whale Day was started to help protect and raise awareness for humpback whales; but since then all whales have been included! And incase you'd like like know the whole classification of whales then listen in as I poorly attempt to read a few orders, infraorder and suborders...it does not go well.Baleen whales VS Toothed whales. Is there a difference? Yes. Their teeth. One has baleen and the other have teeth...but that should be obvious. We focus more on the baleen whales and their huge role they play in saving the planet and phytoplankton. Are you breathing right now? You should thank a whale. Thank you Whales!!To find a local aquarium that's accredited by WAZA click here!https://www.waza.org/members/find-a-waza-zoo-or-aquarium/To learn about what to ask before scheduling a Whale Tour check out the International Whaling Commission (IWC) click here! https://wwhandbook.iwc.int/en/preparing-for-a-trip/questions-you-can-ask-when-booking-a-tourScientific NamesRight whale: Eubaleana glacialisHumpback whale: Megaptera novaeangliaeBlue whale: Balaenoptera musculusSperm whale: Physeter macrocephalusOrca: Orcinus orcaAmazon River Dolphin: Inia geoffrensisFollow the Podcast on Social Media!Instagram @wafpodcasttiktok @wafpodcastEmail: wafpodcastexplicit@gmail.comFacebook: "Weird Animal Facts: Explicit" Support the show (https://www.ko-fi.com/wafpodcast)

Instead
60– Seize the carp! How zooplankton can reduce algal blooms in Utah lake, with undergraduate researcher Cristina Chirvasa

Instead

Play Episode Listen Later Feb 7, 2022 13:42 Transcription Available


This episode is about Utah lake. A body of water that some people find a bit gross. Learn how Utah Lake earned its reputation. What's being done to help the lake's ecological processes recover. And how an undergraduate research project is supporting those efforts.https://archive.sltrib.com/article.php?id=4344748&itype=CMSIDhttps://www.uen.org/utah_history_encyclopedia/u/UTAH_LAKE.shtmlhttps://www.ksl.com/article/5841542/utah-lakes-excess-carp-become-mink-food-compost

Master of None- Adventures in a Hands-on Life
Episode 136: Real Sea Creatures

Master of None- Adventures in a Hands-on Life

Play Episode Listen Later Feb 6, 2022 66:46


We're putting creatures in the basement tidepool!  Here's your complete breakdown of what we're adding- from the microscopic to the giant kraken.  

DER Meerwasseraquariumpodcast mit Markus Mahl
# 296 ZOOPLANKTON UND DIE POSITIVEN AUSWIRKUNGEN AUF KORALLEN UND MEHR

DER Meerwasseraquariumpodcast mit Markus Mahl

Play Episode Listen Later Jan 24, 2022 6:22


Die Zugabe von Zooplankton ist ein elementarer Bestandteil im Meerwasser-aquarium. Nicht nur die Korallen, sondern auch die gesamte Biologie des Aquariums reagieren extrem positiv auf die Zugabe. Hie findest du ds Zoplankton das ich bei unseren Kunden verwende>>> Plankto Mein Pflegemittel-Onlineshop: Kennst du meine Profi-Pflegemittel für Meerwasseraquarien? Als treuer Podcasthörer erhältst du einen Sonderrabatt von 10% in unserem Onlineshop  www.aquacura.de. Sichere dir jetzt einen Sonderrabatt von 10% auf deinen gesamten Warenkorb im Aqua Cura Shop. Rabattcode: 10 www.aquacura.de Dort findest Du die besten Wasserwasseraquaristik-Pflegemittel, die wir auch bei allen unseren Kunden in über 2000 Aquarienwartungen verwenden. Wenn du dich für eines der bereits mit 10% rabattierten Sparpakete wie zum Beispiel eine hochwirksame Calciumlösung und eine Lösung zur Stabilisierung der Karbonathärte entscheidest sparst du mit dem Rabattcode 10 satte 20% . Alle Produkte bei uns im Shop bestehen aus den hochwertigsten Rohstoffen und wurden langen Praxistests vor der Markteinführung unterzogen.. Gehe auf  www.aquacura.de  und sichere dir jetzt deinen Rabatt. Hierfür muss du nur im Warenkorb im Rabattfeld die Zahl 10 eingeben. Rabattcode: 10 Profi-Beratung durch Markus Mahl: Da brauchst Hilfe bei einem Problem mit deinem Meerwasseraquarium?  Hier kannst du die Beratung buchen:  >>>>> Beratung durch Markus Mahl    kostenlose Checklisten für dein Meerwasseraquarium :  Hier findest du die kostenlose Checklisten für dein Meerwasseraquarium:   https://aktion.aquacura.de/Geschenk Hörbuch-Meerwasseraquarium: Erfahre alles war für ein Meerwasseraquarum wichtig ist in meinem Hörbuch "Meerwasseraquarium - Aquarium bauen und Pflegen wie die Profis" Du kannst dir das Hörbuch sofort herunterladen und anhören wann und wo immer du möchtest. Grundlage für das Hörbuch ist mein Buch: Amazon-Bestseller: "Meerwasseraquarium - Aquarium bauen und pflegen wie die Profis"  Neben dem Hörbuch erhälst du noch 4 PDFs zum Downloads: Zudem einem Profi-Pflegeplan, einem 37 Seiten bebilderter Tierteil (Meerwasserfische, Korallen, Muscheln, Garnelen, Seesterne, Seeigel und eine Checkliste für deine Wasserwerte) . Und das Beste im Hörbuch selbst wartet noch eine Überraschung auf dich. Hier kannst du das Hörbuch jetzt zum Sonderpreis herunterladen >>>>> Hörbuch   oder kopiere dir den folgenden Link: https://bit.ly/2FGAGKT   Mein Buch - Meerwasseraquarium bauen und arbeiten wie die Profis -: Hier findest du mein Buch den Amazon-Bestseller: "Meerwasseraquarium - Aquarium bauen und Pflegen wie die Profis" Buch hier bestellen >>>> https://amzn.to/2UspYiY   Hier geht´s zum Meerwasser-BLOG: hier klicken     Folge mir auf Instagram: https://www.instagram.com/aquarium_west_gmbh/    

The Martin Bailey Photography Podcast (Old MP3 Feed)
The Universe in Three Drops of Water

The Martin Bailey Photography Podcast (Old MP3 Feed)

Play Episode Listen Later Nov 20, 2021 13:03


In this episode, I share photographs and a video and invite you on safari in an entire universe of plankton life in just three drops of river water. Check out the video at https://mbp.ac/universe Details on the blog: https://mbp.ac/759 Music by Martin Bailey

The Martin Bailey Photography Podcast
The Universe in Three Drops of Water

The Martin Bailey Photography Podcast

Play Episode Listen Later Nov 20, 2021 13:03


In this episode, I share photographs and a video and invite you on safari in an entire universe of plankton life in just three drops of river water. Check out the video at https://mbp.ac/universe Details on the blog: https://mbp.ac/759 Music by Martin Bailey

Der Reefer‘s Podcast by SANGOKAI
Folge 31 - Euer Mixtape #2: Springschutz für Fische, Korallenherkunft und (Zoo)Plankton im Meerwasseraquarium

Der Reefer‘s Podcast by SANGOKAI

Play Episode Listen Later Aug 20, 2021 93:15


Wie schon angekündigt seid heute IHR die Stars der Show und beglückt uns mit netten und interessanten Sprachnachrichten. Angefangen mit Benjamin, der den Springschutz für Fische anspricht und damit eine Thematik aufrollt, bei der man selbst aktiv werden muss, wie auch immer man das tut und egal ob man ein „Abdecker“ wie Dominik oder ein „Umrander“ wie Jörg ist. Weiter gehts mit einer Frage von Andreas zu den möglichen Problematiken, die die verschiedenen Herkunftsgebiete der Korallen auf der Welt so mit sich bringen können. Wir finden, auch eine sehr wichtige Frage, bei der man einige Dinge beachten sollte, um Fehler zu vermeiden. Abschließend besprechen wir die Frage von Olli über das Plankton, v.a. Zooplankton im Meerwasseraquarium, was das überhaupt genau ist und wie man es einbringen und ggf. auch am Leben erhalten kann. Oder geht das eigentlich gar nicht? Spannende Frage! Wir sind sehr dankbar für Eure Fragen und bedanken uns ganz herzlich und hoffen auf viele weitere solcher Mixtape Folgen mit Eurer Unterstüzung! Happy Reefing everybody.

bUnekeRadio
Manifest Monday Show Live with Gillian Harris talking about Mookaite Manifesting

bUnekeRadio

Play Episode Listen Later Apr 12, 2021 46:00


April 12, 2021 is the second Monday of the month and on Manifest Monday Show, that means our sponsor, Gillian Harris, of Gillian Harris Worldwide Metaphysical Services is joining us live to talk about how she has manifested a magnificent life for herself! Her tips and guidance can help you, too! Call 516-418-5651 between 11 a.m. and 11:45 a.m. Eastern Time to talk with Gillian and Mary! Today, they are talking about the color beige and mookaite. Mookaite jasper is a stunning, multi-colored stone with reds, yellows, and purples formed from the fossilized remains of microscopic radiolarians, tiny, free-floating, Zooplankton that produce intricate mineral skeletons made of silica.Mookaite is found in the 110-million-year-old Windalia Radiolarite formation in Australia. Mineral impurities create the brilliant coloration in Mookaite.

Projekt Zukunft: Das Wissenschaftsmagazin
Warum ist Plankton wichtig?

Projekt Zukunft: Das Wissenschaftsmagazin

Play Episode Listen Later Feb 28, 2021 2:32


Die Frage an Projekt Zukunft kommt diese Woche aus Kolumbien. Amaia Angarita will wissen: Warum ist Plankton wichtig für unsere Erde?

63 Degrees North
Shedding light — on the polar night

63 Degrees North

Play Episode Listen Later Jan 27, 2021 24:07


Krill eyeballs. The werewolf effect. Diel vertical migration. Arctic marine biologists really talk about these things. There's a reason for that — when it comes to the polar night, when humans see only velvety darkness, krill eyeballs see things a little differently. And when the sun has been gone for months, during the darkest periods of the polar night, the moon does unexpected things to marine organisms. Learn more about what biologists are figuring out about the workings of the polar night — and what it means at a time when the Arctic is warming at a breakneck pace. Our guests for this episode were Jørgen Berge, Geir Johnsen, Laura Hobbs and Jonathan H. Cohen. You can see a transcript of the episode here. Fridtjof Nansen's book about his Arctic expedition is called Farthest North. You can also read about the other influences his pioneering journey had on science here. You can also read about Geir Johnsen's different research projects in a series of articles from Norwegian SciTech News. The findings of the polar night team are so surprising that they actually wrote a textbook about it, edited by Jørgen Berge, Geir Johnsen and Jonathan H. Cohen. The book is titled Polar Night Marine Ecology: Life and Light in the Dead of Night. Here are some of the scientific articles describing the polar night research: Berge, J., Båtnes, A.S., Johnsen, G. et a. (2012) Bioluminescence in the high Arctic during the polar night. Mar Biol 159: 231-237 Berge, J., Renaud, P. E., Darnis, G. et al. (2015) In the dark: A review of ecosystem processes during the Arctic polar night. Progress in Oceanography, 139: 258-271 Berge, J., Daase, M., Renaud, P.E. et al. (2015) Unexpected Levels of Biological Activity during the Polar Night Offer New Perspectives on a Warming Arctic Current Biology,25, 2555-2561. Cohen J.H., Berge J., Moline M.A. et al. (2015) Is Ambient Light during the High Arctic Polar Night Sufficient to Act as a Visual Cue for Zooplankton? PLoS ONE 10(6): e0126247. doi:10.1371/journal.pone.0126247 Ludvigsen, M., Berge, J., Geoffroy, M. et al. (2018) Use of an Autonomous Surface Vehicle reveals small-scale diel vertical migrations of zooplankton and susceptibility to light pollution under low solar irradiance. Science Advances 4: eaap9887 Hobbs L, Cottier FR, Last KS, Berge J (2018) Pan-Arctic diel vertical migration during the polar night. Mar Ecol Prog Ser 605:61-72. Berge, Jørgen; Geoffroy, Maxime; Daase, Malin; Cottier, Finlo Robert; Priou, Pierre; Cohen, Jonathan H.; Johnsen, Geir; McKee, David; Kostakis, Ina; Renaud, Paul Eric; Vogedes, Daniel Ludwig; Anderson, Philip J.; Last, Kim S.; Gauthier, Stephane. (2020) Artificial light during the polar night disrupts Arctic fish and zooplankton behavior down to 200 m depth. Communications Biology. 3 (102), 10.1038/s42003-020-0807-6 See acast.com/privacy for privacy and opt-out information.

Ted & Ed
S1E34: Zooplankton Infomercial

Ted & Ed

Play Episode Listen Later Nov 2, 2020 6:24


Ted & Ed's post-Halloween episode is taken over by Jolores and her assistant, Zooplankton, who have plenty of unique items for sale. Call now.

The Climate Academy
S1/Ep. 3 Jessica Luo: machine learning, zooplankton & climate model development

The Climate Academy

Play Episode Listen Later Sep 10, 2020 48:06


The guest of this episode is Jessica Luo, a research oceanographer at Geophysical Fluid Dynamics Laboratory (GDFL) in Princeton, NJ. Jessica and I talked about the very important role of ocean biogeochemistry in mediating carbon fluxes from the atmosphere, focusing on her most research paper on data driven modelling of gelatinous zooplankton. At GFDL Jessica is working in implementing ocean biogeochemistry in their earth system model and in this episode she tells us why it is important to know all these fine details to better predict climate change. Visit Jessica's website for more information on her research https://www.gfdl.noaa.gov/jessica-luos-homepage/. --- Send in a voice message: https://anchor.fm/the-climate-academy/message

Naturally Recovering Autism with Karen Thomas
The Health Benefits of Quinton Trace Minerals with Robert Slovak

Naturally Recovering Autism with Karen Thomas

Play Episode Listen Later Sep 9, 2020 20:08


Mineral deficiency is prevalent in children with autism. Actually, it’s prevalent in most people today because our the soil our food is grown in is so depleted. A deficiency in trace minerals is the core of so many issues that can be continuing to keep your child at bay from really getting well. Impaired children need this more because they don’t utilize trace minerals well. Even what we think is healthy organic food has been grown in mineral deficient soil. That means your food is not giving you adequate amounts of the necessary minerals and nutrition needed for optimum health. Scientist, Rene Quinton, recognized the biological and energetic properties of one, very specific phytoplankton bloom naturally occurring in only one place in the ocean. He extracted these trace minerals from a a protected part of the Bay of Bascay off the coast of Spain and France. This particular area has a plankton bloom with both phytoplankton and Zooplankton. Sunlight then converts this bloom into the exact combination of minerals, amino acids, nucleic acids and more. What this means is that the 78 minerals contained within this sea water were in specific ratios that are very similar to that within the human plasma. This bloom then communicates with our cells for proper function. The human body does not make these trace minerals, yet must have them for transmitting nerve impulses, muscle contraction, blood sugar regulation, nail, hair, skin and bone health, electrolyte balance, hydration and energy production. Scientists tell us there are 16 minerals that are necessary for survival, but we need 78 to thrive. Quinton contains all 78. They are a natural seawater source, so they taste like salt water, and they come in small vials. You can the Isotonic Quinton minerals once a day, or a couple a day, if you like. Robert Slovak’s Biography:    Robert Slovak is a degreed Mechanical and Astronautical engineer, best known as the co-founder, with his brother Jack, of Water Factory Systems in the early 1970’s. He is recognized as one of the key developers of Reverse Osmosis (RO) technology and its numerous applications. Click Here or Click the link below for more details. http://NaturallyRecoveringAutism.com/minerals  

Sitting Dockside
Episode 023- Dr. Ken Wagner Zooms In On The Links To Your Lake and Pond Problems

Sitting Dockside

Play Episode Listen Later Aug 9, 2020 69:59


Dr. Ken Wagner , consultant, editor, and great euchre partner, sits down with us and we talk about...How energy is passed through a system from algae to large fishHow he takes a net and Captures little Critters ( zooplankton) in your lake or pond.The stories these zooplankton can tell us about your lake or pond.The new research on blue green algaeWe get to also ask him about his career, his favorite projects, and his biggest hurdles.Have questions or want to tell us your thoughts on this subject? Join our Facebook Community: https://www.facebook.com/groups/PWNRA/ Support the show (http://www.pwnra.org)

Ecotono
La importancia del Zooplankton (200512)

Ecotono

Play Episode Listen Later May 21, 2020 27:01


La bióloga Áurea Rodríguez presenta contenido educativo sobre el zooplankton. Ecotono es una invitación al conocimiento práctico sobre ecología y los fenómenos naturales que ocurren en Puerto Rico, a observar con curiosidad el mundo natural y resaltar las relaciones de cuidado mutuo. Una producción de Para la Naturaleza para Radio Universidad de Puerto Rico. Sintoniza todos los martes a las 3:30 pm a través de Radio Universidad de Puerto Rico en el 88.3 FM en Mayagüez, el 89.7 FM en San Juan y radiouniversidad.pr.

We Appreciate Manga™
047: Neon Genesis Evangelion vol. 5

We Appreciate Manga™

Play Episode Listen Later May 1, 2020 52:48


The Manga starts to differentiate itself from the anime, now that all characters come together.  Shinji experiences his first late night party and when the lights go off, things also get a bit steamy!  Skip synop @3:49 Neon Genesis Evangelion vol. 5 Chapters 27 to 33 “If this be the work of man, it will come to naught”   By Yoshiyuki Sadamoto Translation by Lillian Olsen   Topics Shinji’s first party. Asuka being that one girl where it’s like walking on eggs to be with. Gendo as a father and wherever or not he should be responsible for Shinji as a teenager. Missing Angels from the anime, Sandalphon and Matarael do not make an appearance. Showing that the manga isn’t going for an “Angel of the week plot”. Shinji as an “Atlas Personality”. E.g. Someone with Depression and anxiety, as well as over-sensitivity to others and an inability to assert their own needs.  Vogel, L. Z., & Savva, S. (1993). Atlas personality. British Journal of Medical Psychology Putting context to the Biblical elements. Adam, Crucifixion and the Lance of Longiness. First hint towards the “Human Instrumentality Project”. Other References Raiders of the lost Ark (1981 Dir, Steven Spielberg) The first Indiana Jones movie, it was the highest grossing movie of that year and was a collaboration between George Lucas and Steven Spielberg. Paramecium, a microscopic being that feeds on bacteria. Water Flea a.k.a Cladocera, a freshwater creature that can reproduce sexually and asexually, not to be confused with ZooPlankton. James is talking about a specific pest, be it a tick or louse. Mitochondria Otherwise known as “The Powerhouse of the Cells”, it is responsible for providing chemical energy to our cells. James and Steven talk briefly about the Endosymbiotic Theory, another branch of Creationism. What James refers to as the “primordial soup” is the Proto-Mitochondrion, the ancestor that which begot mitochondria and the majority of species on earth.   Plot Summary Asuka moves into Misato’s apartment with Shinji, Shinji’s friends Toji and Aida, notice that Misato is promoted and so they throw a party in celebration. This leads to a night a of drinking for Misato and Kaji followed by the admission of why they broke up and who was responsible.  After this night the EVAs are deployed to fight a new angel that has appeared in satellite form Over Tokyo 3, it uses its own mass as a weapon so to target NERV HQ. To fight the angel, all 3 pilots work together to overcome it. After this a power failure leads to the revelation of a few secrets and an intimate moment for our characters.   Instagram –  weappreciatemanga.co.uk Twitter - @RealJamesFitton Website – Weappreciatemanga.com Email – Weappreciatemanga@gmail.com

Cal's Week in Review
Ep. 45: Impending Policy, Honeybees, and a 60-Year-Old Trout

Cal's Week in Review

Play Episode Listen Later Mar 8, 2020 19:50


This week, Cal talks about the land and water conservation fund, poor policies and bad politics. Presidential tweets, the difference between phytoplankton and zooplankton and so much more. Connect with Cal and MeatEater Cal on Instagram and Twitter MeatEater on Instagram, Facebook, Twitter, and Youtube Shop MeatEater Merch

Die drei Meerjungfrauen
#diedreimjf - Adventskalender 2019 Türchen 8: Calanoidae

Die drei Meerjungfrauen

Play Episode Listen Later Dec 8, 2019 15:03


Nachdem wir gestern viel über Kieselalgen geredet haben, erfahren wir heute von was diese wunderschönen Zellen unter anderem gefressen werden: Hinter Türchen 8 versteckt sich die Calanoida! Anna erzählt uns, was überhaupt Zooplankton ist und dass sie sich in Temoridae sie sich verliebt hat...

meer nachdem adventskalender zellen hintert zooplankton copepods kieselalgen
Field Notes on Climate Change
Copepods: Zooplankton & Microscopic Life in Arctic Lakes

Field Notes on Climate Change

Play Episode Listen Later Oct 17, 2019 28:49


Based at the Climate Impacts Research Station, we take you into the field with scientists as they investigate climate change in an Arctic environment. We're with Steph Owens and Danny Lau, sampling copepods, a type of tiny crustacean that lives in the water to measure growth rates in different types of pond to see how they react to an increase in organic matter, which is likely to occur with climate change.Get in touch: Tweet @ArcticCIRC  @emmabrisdion www.arcticirc.net

arctic lakes microscopic zooplankton copepods
GRADCAST
230 | There's No Plankton Like Zooplankton

GRADCAST

Play Episode Listen Later Aug 26, 2019 27:08


Second year biology master's student Rosie Savage is passionate about plankton! From the Pacific coast of Western Canada to the genetics lab at the University of Western Ontario, hosts Yimin Chen and Ariel Frame hear all about Rosie's adventures collecting, sequencing, and studying tiny marine zooplankton and their even tinier parasites. Produced by Gavin Tolometti

Straight from a Scientist Medical Research Education and Discussion Podcast
Ep. 16: Marine Biology and Climate Change with Dr. Jordan Grigor

Straight from a Scientist Medical Research Education and Discussion Podcast

Play Episode Listen Later Mar 12, 2018 57:58


The SSMV Aquarium is totally funded by donations, which pay for food, animals, and maintenance. If you are interested in supporting these efforts to teach Nashville high school kids marine biology, please visit the gofundme page. Last week, we got the opportunity to sit down with Dr. Jordan Grigor, a postdoc working at the School for Science and Math at Vanderbilt (SSMV).  He is both an educator and marine biology scientist.  We cover the uncertain future of keystone species like plankton in the arctic, and discuss the unique science education program at the SSMV that helps kids learn about science and marine ecosystems. Click here to support the SSMV aquarium. This was our first remote recording, as the podcast was conducted on-site in the SSMV. You may notice echoes in the beginning of the podcast, but stick with it as it does not persist throughout! Many thanks to Dr. Grigor for hosting us!  The picture above doesn't do the aquarium justice.  It's really a sight to behold and is changing all the time- a terrific experience for the lucky students at the SSMV! The SSMV Aquarium is totally funded by donations, which pay for food, animals, and maintenance. If you are interested in supporting these efforts to teach Nashville high school kids marine biology, please visit the gofundme page here.  Some of Dr. Grigor's work: His ResearchGate profile, including all the papers published on zooplankton Underdogs of the Arctic - A Video Summary of his PhD research   School for Science and Math at Vanderbilt (SSMV) website SSMV Facebook More about the SSMV Aquarium Project: Facebook  Twitter SSMV Blog  Instagram Special Instagram for Lucy, the decorator crab Other Resources: Svalbard Zooplankton Identification App (an Android app made by the students and I to help people learn about Arctic zooplankton species) We also mentioned: Chasing Coral - A marine biology documentary Before the Flood- A climate change documentary The Intergovernmental Panel on Climate Change- A great resource for those looking to learn more about the science behind climate change   Any other questions?  Let us know!  We appreciate your feedback. You can now support the podcast at https://www.patreon.com/sfspodcast.  Many thanks to our past and present supporters!  Thanks to Plant Warrior for their support.  Use discount code SFS10 at checkout for 10% off your purchase of plant-based protein.

RNZ: Our Changing World
Big award for studying small lake critters

RNZ: Our Changing World

Play Episode Listen Later Nov 2, 2017 13:46


The 2017 Marsden Medal is awarded to Carolyn Burns for her internationally renowned research into New Zealand's deep southern lakes.

RNZ: Our Changing World
Big award for studying small lake critters

RNZ: Our Changing World

Play Episode Listen Later Nov 2, 2017 13:46


The 2017 Marsden Medal is awarded to Carolyn Burns for her internationally renowned research into New Zealand's deep southern lakes.

Reno Fly Shop Podcast - A Fly Fishing Podcast with Special Guests, the Fly Fishing Report for Northern Nevada, California and
EP035: Nancy Vucinich – Pyramid Lake Update, Happy Zooplankton and Big Lahontan Cutthroat trout

Reno Fly Shop Podcast - A Fly Fishing Podcast with Special Guests, the Fly Fishing Report for Northern Nevada, California and

Play Episode Listen Later Sep 28, 2017 36:59


“Freshwater inflow plus nutrients makes for really great conditions to grow Lahonton Cutthroat Trout” – Nancy Vucinich, Senior Fishery Biologist, Pyramid Lake Fisheries Nancy Vucinich was last on the podcast about a year ago and what a year it has been. Nancy has had to... The post EP035: Nancy Vucinich – Pyramid Lake Update, Happy Zooplankton and Big Lahontan Cutthroat trout appeared first on Reno Fly Shop | Northern Nevada Fly Fishing Outfitters.

Speak Up For The Ocean Blue
SUFB 032: Plankton in Need of Protection to Save the Ocean

Speak Up For The Ocean Blue

Play Episode Listen Later Oct 19, 2015 19:14


We often think that marine mammals, sharks, and sea turtles are the most important to the ocean because they are big. However, it is the tiniest animals called plankton that are most important. I tell you why and how in today's podcast. 10 Ocean Tips to Conserve the Ocean: http://www.speakupforblue.com/wordpress/sufb_optinpdf Show Notes: http://www.speakupforblue.com/session32

GenusPodcast
Meso- und Makrozooplankton im Benguela-System

GenusPodcast

Play Episode Listen Later Nov 23, 2011 4:46


Das Zooplankton spielt in allen Ozeanen eine entscheidende Rolle für den Transport von Material von den Primärproduzenten (Phytoplankton) zu den höheren trophischen Ebenen (z.B. Fische). Es setzt sich aus verschiedenen Tiergruppen wie Pfeilwürmern, Nacktschnecken, Salpen, Quallen, und Fischlarven zusammen. Den größten Anteil haben kleine Ruderfußkrebse. Tiere des Zooplankton schweben oder treiben im freien Wasser und sind nicht in der Lage sich aktiv gegen Strömungen fortzubewegen. Sie sind Nahrung für die meisten größeren Meerestiere bis hin zu Walhaien und Bartenwalen. Im Benguelastrom kommt es aufgrund des Auftriebs von nährstoffreichem Wasser und einer damit verbunden hohen Phytoplanktonproduktion zu hohen Zooplanktonbeständen, die die Grundlage für den großen Fischreichtum dieses Gebietes bilden. Um das Zooplankton zu untersuchen, wird es mit speziellen Netzen gefangen. So ermöglicht das eingesetzte MOCNESS z.B. den Fang der Tiere in verschiedenen Wassertiefen. Es hat 18 Netze, die von Bord aus in bestimmten Wasserschichten geöffnet bzw. geschlossen werden können. Sollen die Tiere für Experimente lebend gefangen werden, verwendet man kleinere Netze, die die Tiere schonender fangen. Im Projekt GENUS wird die horizontale und vertikale Verteilung des Zooplanktons, die Stellung der verschiedenen Organismengruppen im Nahrungsnetz und ihr Beitrag zum Kohlenstoffkreislauf untersucht. Die gewonnenen Erkenntnisse ermöglichen das Verständnis der Rolle bestimmter Tiergruppen, sogenannter Schlüsselorganismen, im Ökosystem und in den Stoffkreisläufen des namibischen Auftriebsgebietes. Außerdem wird abgeschätzt, wie viel Biomasse mit Strömungen in den offenen Ozean verdriftet wird. Herabsinkendes abgestorbenes Phyto- und Zooplanktonmaterial trägt zur Ernährung der Organismen im tiefen Wasser und am Boden bei. Die Bodenlebewelt wurde mit Hilfe eines ferngesteuerten Unterwasserfahrzeugs (ROV) mit Kameras erfasst.

GenusPodcast
Krill - ein Schlüsselorganismus im marinen Nahrungsnetz

GenusPodcast

Play Episode Listen Later Sep 2, 2011 6:05


Euphausiden, besser bekannt als Krill, sind kleine, garnelenartige Krebstiere und gehören zum Zooplankton im Benguela-Auftriebsgebiet. Krill stellt die Nahrungsgrundlage für viele Fische und Meeressäuger dar und dient vor Namibia als Ökosystemanzeiger. Im Arbeitsgebiet kommen mindestens acht verschiedene Krill-Arten vor. Zu Forschungszwecken wird Krill vornehmlich mit dem MOCNESS gefangen: ein Netz, mit dessen Hilfe Zooplankton-Proben aus unterschiedlichen Wassertiefen geborgen werden können. Das ist wichtig, da sich der Krill je nach Tages- oder Nachtzeit lichtabhängig in unterschiedlichen Tiefen aufhält. Die Erforschung der Krillarten in Hinblick auf ihre physiologischen Eigenschaften und bezüglich der ökologischen Stellung im Nahrungsnetz ist zentraler Bestandteil der Doktorarbeit von Thorsten Werner (AWI-Bremerhaven). Schwerpunkt seiner Forschung ist die Fragestellung, wie sich der Krill auf die ganz unterschiedlichen Rahmenbedingungen, insbesondere Temperatur, Sauerstoff und Nahrungsangebot, im Benguela-Auftriebsgebiet anpasst und welche langfristigen Auswirkungen der Klimawandel in diesem Zusammenhang spielt.

Fakultät für Biologie - Digitale Hochschulschriften der LMU - Teil 02/06
Selected interactions between phytoplankton, zooplankton and the microbial food web: Microcosm experiments in marine and limnic habitats

Fakultät für Biologie - Digitale Hochschulschriften der LMU - Teil 02/06

Play Episode Listen Later Mar 17, 2006


The experiments presented in this thesis elucidate selected interactions between the phytoplankton, the zooplankton and the microbial food web in aquatic ecosystems. The objective is to provide a mechanistic understanding of classic general ecology topics including competition, predator-prey relations, food web structure, succession, and transfer of matter and energy. Special relevance is attributed to the role of mixotrophic organisms, marine cladocerans, and gelatinous mesozooplankton. Although they may contribute substantially to plankton composition they have thus far been neglected in common ecosystem models. All experiments were based on enrichment with nutrients and organic compounds. Enrichment with nutrients and organic compounds that influence overall system productivity is one of the most pervasive human alterations of the environment and profoundly affects species composition, food web structure, and ecosystem functioning. In order to predict the consequences of such enrichment, a better understanding of the impact that trophic structure has on community dynamics and ecosystem processes is required. The presented thesis consists of two studies. The first study includes three experiments in which I investigated the role copepods, cladocerans and doliolids play in plankton interactions. Copepods, cladocerans and doliolids are major mesozooplankton groups in marine systems. The first experiment (Katechakis et al. 2004) showed that copepods, cladocerans and doliolids have different food size spectra and different assimilation efficiencies. According to my experiment, copepods actively select for larger food items, whereas cladocerans and doliolids passively filter medium-sized and small food items, respectively, with doliolids being the only group that feeds efficiently on bacteria and picoplankton. The results illustrate that food niche separation enables copepods, cladocerans and doliolids to coexist. In addition, they emphasize the fact that doliolids are favored in low nutrient environments, characterized by small food items, whereas cladocerans and copepods have competitive advantages at moderate and high nutrient supplies, respectively. Furthermore, copepods obviously utilize ingested food best, gauged in terms of produced biomass, followed by cladocerans and doliolids, which suggests that the different mesozooplankton have different impacts on energy transfer efficiency within the food web. In the second experiment (Katechakis et al. 2002), I investigated how copepods, cladocerans and doliolids directly influence the phytoplankton and the microbial food web over a longer period of time by grazing. Furthermore, I investigated how they indirectly influence the system's nutrient dynamics through "sloppy feeding" and their excretions. According to my experiment, in the long run, doliolids and cladocerans promote the growth of large algae whereas copepods shift the size spectrum towards small sizes with different consequences for food chain length. Doliolids, cladocerans and copepods also affect the microbial food web in different ways. Size-selective grazing may lead to differences in the nanoplankton concentrations. These in turn can affect bacterial concentrations in a trophic cascade. My findings offered the first experimental evidence for the occurrence of top-down effects in marine systems. Although top-down explanations of phytoplankton size structure had been acknowledged for limnic systems before, they had not been attempted for marine systems. In the last experiment of this series (Katechakis and Stibor 2004) I sought to complement the knowledge about the feeding behavior of marine cladocerans. Marine cladocerans are difficult to cultivate in the laboratory. Therefore, the three cladoceran genera found in marine systems, Penilia, Podon and Evadne, had never before been compared under similar conditions. Existing studies with single cladoceran genera were to some extent contradictory. My experiments indicate similar feeding characteristics for Penilia, Podon and Evadne, that is to say, similar food size spectra, clearance and ingestion rates. However, Evadne obviously has problems feeding on motile prey organisms. The results generated by my first study have been summarized and their importance has been hypothetically extended to ecosystem level by Sommer et al. (2002) and by Sommer and Stibor (2002). My second study includes two experiments that refer to the ecological role of mixotrophs in aquatic systems. Mixotrophic organisms combine phototrophic and phagotrophic production dependent on the availability of light and nutrients. Although they are common in aquatic systems, their function for nutrient cycling and as a link to higher trophic levels has never before been examined. In my first experiment (Katechakis et al. 2005) I investigated if mixotrophs influence energy transfer efficiency to higher trophic levels differently than predicted for purely phototrophic organisms. My results indicate that compared to phototrophic specialists mixotrophs may enhance transfer efficiency towards herbivores at low light conditions and in situations when limiting nutrients are linked to bacteria and to the picoplankton. Additionally, the results suggest that mixotrophs may have a stabilizing effect on variations in trophic cascade strength caused by perturbations to light and nutrient supply ratios. My second experiment (Katechakis and Stibor 2005a) served as a first step towards analyzing if the results gained from the first experiment have any ecological relevance in situ, that is, if mixotrophs in nature-like communities can gain enough importance to relevantly influence transfer efficiency and system stability. Competition experiments revealed that mixotrophs may invade and suppress plankton communities that consist of purely phototrophic and purely phagotrophic specialists at low nutrient conditions while high nutrient supplies prevent mixotrophs from successfully invading such communities. In systems where mixotrophs suppressed their specialist competitors they indeed had a habitat-ameliorating effect for higher trophic levels, gauged in terms of plankton food quality.

Fakultät für Biologie - Digitale Hochschulschriften der LMU - Teil 01/06
The effects of diel vertical migration of Daphnia on zooplankton-phytoplankton interactions

Fakultät für Biologie - Digitale Hochschulschriften der LMU - Teil 01/06

Play Episode Listen Later May 25, 2004


Zooplankton populations which perform diel vertical migration (DVM) only spend the night in surface water layers but migrate downwards into the lower water layers during the day. The intention of this study was to investigate effects of DVM of Daphnia on phytoplankton dynamics and Daphnia life history parameters in a lake. I conducted field and laboratory experiments in which I compared ‘migration’ with ‘no-migration’ situations. It is generally assumed that phytoplankton communities in the epilimnion of stratified lakes profit from the presence of DVM. This might be caused by less grazing due to intermittent grazing and/or less grazing due to lower population densities of migrating Daphnia populations (as they migrate into the colder, lower hypolimnion during the day which leads to a lower temperature-dependent population growth). In a first laboratory experiment I showed that an enhanced phytoplankton biomass could develop under a migration regime solely due to intermittent grazing. I further showed that edible phytoplankton species with higher intrinsic growth rates benefited more from intermittent grazing than edible species with lower intrinsic growth rates. Field experiments also indicated that phytoplankton biomass in the epilimnion was higher when subject to a migrating zooplankton population and that additionally different phytoplankton community compositions arose from different migration regimes (‘migration’/’no-migration’). For example edible algae were at an advantage when zooplankton migrated, whereas large, inedible algae species had an advantage when zooplankton populations did not migrate. In an additional laboratory experiment I also showed that these changes in phytoplankton composition had strong feedback effects on life history parameters of daphnids and that food conditions experienced by migrating daphnids were advantageous. In a further laboratory experiment I exposed two Daphnia species to either constant or regularly changing temperature regimes to study whether a fluctuating temperature regime – as experienced by migrating daphnids – implies costs for daphnids. Somatic growth rates of juvenile Daphnia in the regularly changing temperature regime were almost as low as under constant low temperature conditions indicating that a regular change in temperature involves high costs. The results of my study indicate that DVM has a strong modulating effect on zooplankton-phytoplankton interactions in a lake.

Biologie - Open Access LMU - Teil 02/02
Vertikalwanderung von Zooplankton als evolutionär stabile Strategie

Biologie - Open Access LMU - Teil 02/02

Play Episode Listen Later Jan 1, 1990


Mon, 1 Jan 1990 12:00:00 +0100 http://epub.ub.uni-muenchen.de/5069/ http://epub.ub.uni-muenchen.de/5069/1/5069.pdf Gabriel, Wilfried Gabriel, Wilfried (1990): Vertikalwanderung von Zooplankton als evolutionär stabile Strategie. In: Streit, Bruno (Hrsg.), Evolutionsprozesse im Tierreich. Birkhäuser: Basel [u.a.], pp. 87-106. Biologie

Biologie - Open Access LMU - Teil 01/02
Ultimate causes of vertical migration in zooplankton

Biologie - Open Access LMU - Teil 01/02

Play Episode Listen Later Jan 1, 1988


Fri, 1 Jan 1988 12:00:00 +0100 http://epub.ub.uni-muenchen.de/5062/ http://epub.ub.uni-muenchen.de/5062/1/5062.pdf Gabriel, Wilfried; Thomas, Bernhard Gabriel, Wilfried und Thomas, Bernhard (1988): Ultimate causes of vertical migration in zooplankton. An evaluation by evolutionary game theory. In: Wolff, Wilfried (Hrsg.), Ecodynamics. Contributions to theoretical ecology. Springer: Berlin u.a., pp. 127-134. Biologie

Biologie - Open Access LMU - Teil 01/02
Vertical migration of zooplankton as an evolutionary stable strategy

Biologie - Open Access LMU - Teil 01/02

Play Episode Listen Later Jan 1, 1988


Fri, 1 Jan 1988 12:00:00 +0100 http://epub.ub.uni-muenchen.de/5061/ http://epub.ub.uni-muenchen.de/5061/1/5061.pdf Gabriel, Wilfried; Thomas, Bernhard Gabriel, Wilfried und Thomas, Bernhard (1988): Vertical migration of zooplankton as an evolutionary stable strategy. In: American Naturalist, Vol. 132, Nr. 2: pp. 199-216. Biologie

Biologie - Open Access LMU - Teil 01/02
The influence of food availability, predation risk, and metabolic costs on the evolutionary stability of diel vertical migration in zooplankton

Biologie - Open Access LMU - Teil 01/02

Play Episode Listen Later Jan 1, 1988


Fri, 1 Jan 1988 12:00:00 +0100 http://epub.ub.uni-muenchen.de/5060/ http://epub.ub.uni-muenchen.de/5060/1/5060.pdf Gabriel, Wilfried; Thomas, Bernhard Gabriel, Wilfried und Thomas, Bernhard (1988): The influence of food availability, predation risk, and metabolic costs on the evolutionary stability of diel vertical migration in zooplankton. In: Verhandlungen / International Association of Theoretical and Applied Limnology