The unidentified freshwater people that show Antarctica and Patagonia aspirations – mundoacuicola


There is a group of shells that live in; Most of the aquatic ecosystems and have taken the attention of Chilean researchers (Acuícola Mundo).

The copepods, or also "exquisite", are incredible for growing and adaptable to large environments. Today they provide information about the rare rare and rare freshwater animals of the white continent and its connection with South America.

Its small dimensions do not disrupt the spread throughout the planet. They are part of a zooplankton in marine and freshwater environments, as well as performing a basic place in the & # 39; food and identify environmental changes. It is a group of shells that live in her; Most of the aquatic ecosystems that have taken the look of Chilean researchers.

For this reason, the Environment Ministry published records of 14 species of copepods of the genus Boeckella living in Patagonia Chile and Argentinean, in the sub-Antarctic islands and in the Antarctic . The work was edited by scientists from the Institute of Economics and Biodiversity (IEB), the University of China, the University of Magrallanes, Humboldt Coast and the British Antarctic Survey (United Kingdom), to enable research and access to data take forward. The freshwater biodiversity explored.

"The Antarctic freshwater or freshwater animal is scarce and lowered compared to marine biodiversity, since there are mammals, amphibians and reptiles and there is only one bird species. In addition , many believe that the continent is completely frozen, but the largest diversity of lushwater systems, such as water-names, lochs, among others, in which copepods live, " Claudia Maturana, scientist at the Ecological and Biodiversity Institute, supported by CONICYT and the Antarctic Chile Institute to investigate.

Although the Magellanic and Antarctic lakes are usually oligotrophic, that is, they have very little nutrition, they are also different from each other.

While in Patagonia there is more wealth of Boeckella species, only available to its; white continent Boeckella poppei. This is a & # 39; The ultimate species that encouraged scientists' interest to become the only invertebrates; in Antarctic Antarctic lochs, Antarctic Head and the Antarctica islands.

"Although there are other freshwater copepods on white mainland, Boeckella poppei This is the only fascinating chalk in this area, "explains Maturana, who explained some of this day part of this work at the Natural History Museum in London .

Key features of these animals include strong strength and sufficiency. To get an idea, this artropod has a variety of red that protects it from UV radiation, and which lives in large and deep loch link to sea waters, or in smaller and thin eag-systems that eat ice leakage, and submit at temperatures below 5 ° C, and even lower than 0 ° C.

"This animal can stay in an egg condition for many years, as if it were to sleep in winter, to last in a bad situation. In winter, for example, the lochs in Antarctica is resolved, then getting up you can go to the depth or lower than your metabolism level. "

The IEB researcher compiled: "In 2012, a team of Chinese scientists analyzed sediments from a lagoon near Antarctica and found eggs that worked from Boeckella poppei, who was 100 years old and b. They can not steal at any time. "

Hanged by the whales business?

At the moment, one of the big questions is how Boeckella poppei He became one of the few representatives of Antarctic land and freshwater.

"There is no doubt about what happened when Europe's largest glaciation was over 20,000 years ago. Although some say that everything has been destroyed, some of I thought some species were alive with the help of shelves, "says Maturana.

Consideration of its extensive distribution in Antarctic, the Boeckella poppei it is a model to test the previous two opinions.

It is a big question if this copepod was & # 39; is surrounded by the most southerly continent of Land from Patagonia or the sub-Antarctic islands, or has survived by sheltering in remote areas during the period of ice -stream and climate change that took place over a thousand years.

Although there is a link between numbers Boeckella poppei from Antarctica and Patagonia, this would not have been recent since it was more than 20,000 years ago. In any case, it has not yet been clarified how those organisms move. Some of the definitions that may be & # 39; suggests that seabirds who travel between continents may become fractures when they move these cruisers.

Another potential engineer would come to the nineteenth century whale industry. The ship's crew washing water clean from Antarctic lagoons, which was stored in barrels for consumption and other uses. So when they werehave or did; Solving the vessels with beer, the cetaceans hunter could move the copepods to places that were not before.

However, none of these theories were confirmed. "Antarctic choppies are still very impressive and very little have been translated. We have not found more human influence," said the scientist.

Despite the obvious "super-crustaceans" features, the differences and variation methods do not have a clear idea of ​​the different ecosystems in which it is; live. An example of this is that some people have reduced the size of the body and the growth of women, in response to a lower access to resources in the Antarctica mainland.

"Although the location of these animals is studied as seeds of climate change or as a indicator of water quality, the advanced patterns of the freshwater animal have not been investigated. That's why it is important to generate information and given from Chile to learn more about real biodiversity in high lions ", Maturana.



Source link