Scientists race to study Arctic lakes before they are lost forever.
” due to their swift responses to shifting conditions. “Lakes are more sensitive than other ecosystems to climate change,” said environmental microbiologist Mary Thaler, who felt compelled to study the Arctic’s ecosystems because of the dwindling time they might remain in existence. “They’re like the warning bell going off, the first ones to take the hit, and we see them being utterly transformed.
“The important part is that it is a very large reservoir of carbon that we don’t want moved into the atmosphere,” said Arctic ecologist Elizabeth Webb.has largely focused on why Arctic lakes are disappearing far more quickly than expected. She found that the decreases in surface water over the last 20 years have been correlated with two distinct climate variables. The first, not surprisingly, is increasing temperatures.
“We had looked at other parts of the Milne Epishelf Lake’s ecosystem but never the viruses,” she said. “Because it’s so dark, cold, and poor in nutrients, most of what’s in the lake is tiny microscopic life — so viruses can make huge differences in which species are going to thrive.Thaler and her team found that in terms of viruses, the lake had been 25 percent more abundant and diverse compared to the marine layer beneath.
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