Tuesday , July 27 2021

Another day in Krill: Antarctic Crustaceans are more resistant



Antarctic krill may be more resistant than we are facing climate change.

The new Australian study shows that small crustaceans belonging to various species and containing the Euphausiacea scheme are not significantly affected by significant levels of ocean acidification.

In a laboratory study conducted by scientists at the University of Tasmania in Australia, they were able to maintain survival, growth, fat storage, maturation and respiration rates when they were exposed to this century and the acidification levels that could be expected in the future.

Warnings are the only focus of research on adults, so other stages of life may be more vulnerable, and the continuity of the krill will depend on how it reacts to acidification in synergy with other stressors such as ocean warming and reductions in sea ice. .

However, this is an important finding. Krill is the main hunt for many Antarctic marine mammals and seabirds and is therefore an important link in the Antarctic food chain. A kind of, Euphausia superbathe estimated 379 million tons of biomass in the region.

Previous short-term studies have shown that it may be more vulnerable to ocean acidification than to lower latitudes than crustaceans.

As international researchers have noted in a major 2012 review of the impact of climate change on the Antarctic krill, Uluslararası we need to better understand the flexibility and genetic plasticity of the krill life stages Uluslararası.

The new study was conducted at the university's Institute of Maritime and Antarctic Studies and was reported in an article published in the journal. Communication Biology.

Yıl We initially raised adult krill in laboratory tanks for 46 weeks at predicted levels between 46 and 300 years and at sea level to an extremely high level, “he said.

Okyanus We measured a package of physiological and biochemical variables to investigate how future ocean acidification can affect survival, size, lipid stores, reproduction, metabolism, and extracellular fluid.

”Our results showed that their physiological processes were not significantly affected by the pH levels expected to come against the coming centuries.“

Increased anthropogenic carbon dioxide emissions cause ocean acidification because the absorption of atmospheric carbon dioxide in the sea water changes the ocean chemistry.

Oceanic acidification increases mortality and adversely affects the physiological function of some marine invertebrates, leading to reduced mineralization or dissolution of calcium carbonate crusts, decreased or delayed growth, increased mortality, and delayed abnormalities in reproduction or reproduction.

A US study conducted in 2011 suggested that changes in the abundance of krill were responsible for the increase and decrease in the number of penguins in Antarctica.

In the same year, a group of Tasmanian researchers reported that both environmental change and human activity were affected by krill populations and the interest in products from krill increased.


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