Copepods: those who do not know the Antarctic rivers and lochs that show their ambitions Technology



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Its small dimensions do not disrupt the spread throughout the planet. They are part of the zooplankton in marine and freshwater environments, as well as performing a basic place in the & # 39; food and identify environmental changes. We talk about the copepods, a group of sea worms that we have. staying in most of the aquatic ecosystems that have created the profile of the Chinese researchers.

For this reason, the Ministry of Environment published records 14 species of chopepods of the genus Boeckella who live in Patagonia Chile and Argentine, in the sub-Antarctic and Antarctic islands. 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.

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

Claudia Maturana
Claudia Maturana

While in Patagonia there is more wealth of Boeckella species, but the Boeckella poppei is not available on it; white continent. 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 is the only worms that have been so large in this country "explains Maturana, who shows some of this work a few days ago 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 says: "In 2012, a team of Chinese scientists analyzed sediments from a lagoon near their Antarctic base and found the Boeckella poppei eggs, 100 years ago and # 39; age and may be dragged at any time. "

Hanged by the whales business?

At the moment, one of the big questions that Boeckella Poppei has become one of the few representatives of Antarctic animals 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.

Sebastian Rosenfeld
Sebastian Rosenfeld

Having considered its extensive distribution in Antarctica, the Boeckella poppei is a model for testing the two opinions; before.

This is a big question Copepod was surrounded by the most southerly continent on Earth from Patagonia or Antarctic sub-islands, or survived by sheltering in remote areas during the suburban times and climate change that occurred in thousands of years.

Although the Boeckella poppei women from Antarctica and Patagonia are linked, this would not have been more recently since it was over 20,000 years. 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.

Claudia Maturana
Claudia Maturana

"Antarctic copepod numbers are still very little intervention. 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 their group and Increasing women, in response to what resources are needed in the Antarctic continent.

"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.

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