Scientists are racing to study Arctic lakes before they're lost forever. (via grist)
” 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.
It may seem counterintuitive that more rain could lead to fewer lakes. “We were like, why in what world does this make sense?” Webb said. But because autumnal rain is warmer than the frozen ground, it brings a whole lot of heat to the underlying permafrost. That warmth can open up underground channels that drain surface water.earlier than the models projected.”
In Quebec City, Thaler analyzes small amounts of freshwater drawn during a 2016 excursion to Milne Fjord’s epishelf lake. The lake is no more, but the samples teem with life. Thaler goes through each one, trapping bacteria, viruses, and other microbial DNA in filters.NASA / Kathryn Hansen
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