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#crustaceans

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Fossil of ancient crustacean gathering reveals new insights into their lives
nhm.ac.uk/discover/news/2025/m

Gregarious behaviour in #Carboniferous cyclidan #crustaceans royalsocietypublishing.org/doi

"With legs emerging from underneath rounded shells, #cyclidans looked not unlike an underwater beetle. Earliest species were a few mm in size and form #fossils that look like a tiny bunch of grapes. Over millions of years they evolved larger species, and by the #Triassic they were about as wide as a human hand"

Replied in thread

@jstevenyork
At least you didn't call it a "crab-like" as "Live science" did.
#Amphipods are not #shrimps (ok, one group is called "skeleton shrimps", but they don't even resemble shrimps tbh. and Dulcibella is not from that one).
And this thing looks pretty normal for deep-water Amphipods:
spikesandbristles.pictures (these are freshwater though).
#crustaceans

Lake Baikal AmphipodsLake Baikal Amphipods: About the projectSite about scientific project about Lake Baikal Amphipods and their genomes.

Meet Strawberry Claws—a new species of hermit crab phys.org/news/2024-11-strawber

A new species of #HermitCrab in the genus #Strigopagurus from the continental shelf off south-east #Queensland, #Australia museum.qld.gov.au/collections-

"the #NewSpecies has several highly distinctive features. Most striking is its bright red claws, but it also has evolved its own unique method of producing underwater sound (#stridulation), much like #cicadas do in the air."

This constant rewriting and reshuffling clades around is why no one likes taxonomists!
(joke, we love you, please keep on doing what you do 🙏we need good #Taxonomy )
An important reorganization of Pancrustacea (#crustaceans, #insects & friends) with some interesting #evolutionary implications.
This is going to be one of these papers that will lead to a lot of "hum... actually" to students on what they learned in secondary school (as well as old graduates).
academic.oup.com/mbe/article/4

Absolutely massive, lobster-like signal crayfish in the river Misbourne. These species were brought to the UK from North America to be farmed, but have escaped into the wild & infiltrated some of the UK’s wild rivers, where they are pushing out the smaller native species from their habitats.

#Nature has so far balanced our abuse. This is coming to an end,” - #JohanRockström, director of the Potsdam Institute for #ClimateImpact Research.

#Trees and #land absorbed almost no #CO2 last year. Is nature’s #CarbonSink failing?

The sudden collapse of carbon sinks was not factored into #ClimateModels – and could rapidly accelerate #GlobalHeating

by Patrick Greenfield, October 14, 2024

"It begins each day at nightfall. As the light disappears, billions of #zooplankton, #crustaceans and other marine organisms rise to the ocean surface to feed on microscopic #algae, returning to the depths at sunrise. The waste from this frenzy – Earth’s largest migration of creatures – sinks to the #ocean floor, removing millions of tonnes of #carbon from the atmosphere each year.

"This activity is one of thousands of natural processes that regulate the Earth’s climate. Together, the planet’s oceans, forests, soils and other natural carbon sinks absorb about half of all #HumanEmissions.

"But as the Earth heats up, scientists are increasingly concerned that those crucial processes are breaking down.

"In 2023, the hottest year ever recorded, preliminary findings by an international team of researchers show the amount of carbon absorbed by land has temporarily collapsed. The final result was that #forest, plants and soil – as a net category – absorbed almost no carbon.

"There are warning signs at sea, too. #Greenland’s Glaciers and #ArcticIceSheets are melting faster than expected, which is disrupting the #GulfStream ocean current and slows the rate at which oceans absorb carbon. For the algae-eating zooplankton, melting sea ice is exposing them to more sunlight – a shift scientists say could keep them in the depths for longer, disrupting the vertical migration that stores carbon on the ocean floor."

Read more:
theguardian.com/environment/20

The Guardian · Trees and land absorbed almost no CO2 last year. Is nature’s carbon sink failing?By Patrick Greenfield

Venomous #crustacean from Mayan underwater caves provides new drug candidates phys.org/news/2024-10-venomous

Diversely evolved xibalbin variants from remipede venom inhibit potassium channels and activate PKA-II and Erk1/2 signaling bmcbiol.biomedcentral.com/arti

"It was only discovered a few years ago that there also exist venomous #crustaceans#remipedes that look like centipedes and live in marine #caves... Xibalbanus tulumensis lives in the cenotes, which are the underwater cave systems on the #Yucatan"

In the dark #ocean, these tiny creatures can smell their way home science.org/content/article/da

Circadian migrations of cave-dwelling #crustaceans guided by their home chemical seascape: Marie Derrien et al. frontiersin.org/journals/marin

"Although it’s not clear exactly what gives each #cave its unique smell, the researchers hypothesize that compounds released by #sponges that live in the #caves are playing a role."

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."

Possum #shrimp use their #cave's special smell to trace their way home phys.org/news/2024-09-possum-s

Circadian migrations of cave-dwelling #crustaceans guided by their home chemical seascape frontiersin.org/journals/marin

"H. margalefi lives in sea #caves in the #Mediterranean. It forms dense swarms, with millions of individuals per cave... At dusk, they move over hundreds of meters into open water to feed. At dawn, they return to the same cave to shelter from predators"