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#krill

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Public
Tino Eberl

#Mikroorganismen in der #Antarktis reagieren stark auf steigende Temperaturen und den Rückgang des #Meereises.

Wärmere Bedingungen verändern das Gleichgewicht zwischen #Bakterien und #Phytoplankton – mit möglichen Folgen für die gesamte marine #Nahrungskette.

Weniger #Phytoplankton bedeutet weniger #Nährstoffe für #Krill, #Fische und #Meeressäuger.

dx.doi.org/10.1186/s40793-025-

BioMed CentralSpatial and temporal variation of Antarctic microbial interactions: a study around the west Antarctic Peninsula - Environmental MicrobiomeBackground The west Antarctic Peninsula (WAP) is a region of rapid environmental changes, with regional differences in climate warming along the north–south axis of the peninsula. Along the WAP, Palmer corresponds to a warmer region with lesser sea ice extent in the north compared to Rothera ~ 400 km to the south. Comprehensive and comparative, year-round assessments of the WAP microbial community dynamics in coastal surface waters at these two locations are imperative to understand the effects of regional climate warming variations on microbial community dynamics, but this is still lacking. Results We report on the seasonal diversity, taxonomic overview, as well as predicted inter-and intra-domain causal effects (interactions) of the bacterial and microbial eukaryotic communities close to the Palmer station and at the Rothera time-series site between July 2013 and April 2014. Our 16S- and 18S-rRNA gene amplicon sequencing data showed that across all seasons, both bacteria and microbial eukaryotic communities were considerably different between the two sites which could be attributed to seawater temperature, and sea ice coverage in combination with sea ice type differences. Overall, in terms of biotic drivers, causal-effect modelling suggests that bacteria were stronger drivers of ecosystem dynamics at Palmer, while microbial eukaryotes played a stronger role at Rothera. The parasitic taxa Syndiniales persevered at both sites across the seasons, with Palmer and Rothera harbouring different key groups. Up to 62.3% of the negative causal effects were driven by Syndiniales at Rothera compared to only 13.5% at Palmer, suggesting that parasitism drives community dynamics at Rothera more strongly than at Palmer. Conversely, SAR11 Clade II, which was less abundant but persistent year-round at both sites, was the dominant driver at Palmer, evidenced by many (28.2% and 37.4% of positive and negative effects respectively) strong causal effects. Article note: Kindly check first page article notes are correct. Conclusions Our research has shed light on the dynamics of microbial community composition and correlative interactions at two sampling locations that represent different climate regimes along the WAP.
#Ozeane#Klimawandel#Ökosysteme
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Sea Shepherd
From stopping whalers to confronting the #krill fleet, we’ve shown that change is possible. But now, the stakes are higher than ever. While our crew is on its way to #Antarctica, we need your support to fight on every front.

Here’s how you can help:
1️⃣ Spread the word—help others understand the #krillcrisis.
2️⃣ Become an Ocean Warrior—your monthly support powers our fight. (link in bio)
3️⃣ Tomorrow, we’re launching something BIG that lets you take immediate action. Stay tuned!

Together, we can #StopThePlunder 🙌

🎥 Alice Gregoire / Sea Shepherd
Public
Sea Shepherd
Not even an hour in, and we’ve already got company! 🐬⛴️ #Dolphins showed up right after departure—almost like they knew we were heading south to track down the #krill industry stripping the ocean bare and came to wish us luck.

These beautiful creatures depend on a healthy ocean. And so do we. Will you stand with us to #StopThePlunder?

Learn more about our campaign via the link in our bio.📌

🎥 Alice Gregoire / Sea Shepherd
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Sea Shepherd
Losing #krill would send shockwaves through the #ecosystem—and beyond.
Here’s why: They’re not just essential food for #whales, #seals, and #penguins. They’re key to our climate. When wildlife feeds on krill, they help transfer carbon to the deep ocean, playing a vital role in stabilizing the climate.
👉 Overfishing krill threatens this balance. Protecting them means protecting life on Earth. 🌏
We’re heading back to protect this fragile ecosystem and take on these relentless trawlers when they least expect it. Your support fuels our mission. Let’s fight for #Antarctica’s future—join us today! https://seashe.ph/SavingAntarctica
#stoptheplunder #seashepherd #antartica #wildlife
#wildlife
Public
Glyn Moody

Fishing boats spotted competing with #whales in Antarctica for #krill - news.mongabay.com/short-articl "two Norwegian ships and one Chinese vessel krill fishing in the region; the Chinese ship was near feeding humpback whales (Megaptera novaeangliae)." sickening human greed... #norway #china

Mongabay Environmental News · Fishing boats spotted competing with whales in Antarctica for krillNearly all of Antarctica’s iconic wildlife, from penguins to seals and whales, depend on krill, tiny crustaceans that make up the base of the food chain. Krill are also sought after by humans, who scoop them up using massive fishing boats, potentially putting whales in danger, scientists warn. The fishing boats and whales are “going […]
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Lukas VFN 🇪🇺

Antarctic #krill can lock away similar levels of #carbon as #seagrass, #mangroves phys.org/news/2024-09-antarcti

Antarctic krill sequester similar amounts of C to key coastal #BlueCarbon habitats: Emma Cavan et al. nature.com/articles/s41467-024

"Krill are extremely numerous #crustaceans that live around #Antarctica. They eat #algae that take carbon out of the atmosphere by photosynthesis. When krill poo or molt their exoskeletons, the carbon sinks into the #DeepSea where it can stay for a very long time."

a graphic comparing carbon sequestration by coastal habitats like mangroives and antarctic krill
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Tino Eberl

Antarktischer #Krill trägt durch seine sinkenden Kotpellets wesentlich zur #Kohlenstoffspeicherung bei, ähnlich wie #Küstenökosysteme wie #Salzwiesen oder #Mangroven. Jährlich speichern sie etwa 20 Millionen Tonnen #Kohlenstoff, was einem Wert von 4 bis 46 Milliarden US-Dollar entspricht. Angesichts der Bedrohung durch den #Klimawandel und die #Fischerei wird der Schutz dieser wichtigen #Kohlenstoffsenke immer dringlicher.

#Science #Antarktis #Klimawandel #Fischerei

nature.com/articles/s41467-024

NatureAntarctic krill sequester similar amounts of carbon to key coastal blue carbon habitats - Nature CommunicationsAntarctic krill are important facilitators of carbon sequestration, transferring as much carbon to the deep ocean through their faeces as is stored in seagrass beds and mangrove forests.
Replied to anna_lillith 🇺🇦🌱🐖
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anna_lillith 🇺🇦🌱🐖

Human harvesting of #krill in the Southern Ocean could threaten the recovery of #whale species that were nearly wiped out by industrial whaling in the 20th century, according to a Sept. 10 study in #NatureCommunications.

The tiny, shrimp-like crustaceans known as krill are the essential food source for #BaleenWhales such as #blues and #humpbacks. To feed, these giant marine mammals take in great gulps of ocean water, filtering krill through bristly mouth structures.

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Replied to anna_lillith 🇺🇦🌱🐖
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anna_lillith 🇺🇦🌱🐖

“This study really highlights the need for managers to ensure there is enough #krill left in the #SouthernOcean to feed current whale populations and also enough to support whale recovery,” said study co-author #CassandraBrooks, who earned a doctorate from Stanford’s Emmett Interdisciplinary Program in Environment and Resources (E-IPER) in 2017 and is now an assistant professor in environmental studies at the University of Colorado Boulder.

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news.stanford.edu/stories/2024

news.stanford.eduKrill harvesting threatens whale recoverySoaring human demand for the tiny crustaceans is threatening whale species once hunted nearly to extinction, but scientists say careful management could help ensure there’s enough krill to go around.
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Lukas VFN 🇪🇺

#Krill provide insights into how marine species can adapt to warmer waters phys.org/news/2024-08-krill-in

Ecological #genomics in the Northern krill uncovers loci for local adaptation across ocean basins nature.com/articles/s41467-024

Different populations of Northern krill have historically adapted to very different conditions in different parts of the Atlantic. This makes it a perfect model for understanding which genes and functions contribute to adaptation to different marine environments.

close-up photo of a head of a small shrimp-like crustacean
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Public
Lukas VFN 🇪🇺

Densitaxis: New concept explains how tiny particles navigate water layers, with implications for marine conservation phys.org/news/2024-07-concept-

"There are two different types of microscopic swimmers—pullers & pushers—and they navigate density gradients differently... Some marine organisms, like #krill and #plankton, perform vertical migrations in search of food... pullers might find it easier to navigate these layers, aiding their vertical movement. Conversely, pushers might face more challenges"

microscopic photo of planktonic single-celled algae forming a coiling chain
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