Canadian lake

Climate change could double greenhouse gas emissions from freshwater ecosystems

18 November 2019

Every drop of fresh water contains thousands of different organic molecules that have previously gone unnoticed. By measuring the diversity of these molecules and how they interact with the environment around them, research has revealed an invisible world that affects the functioning of freshwater ecosystems and can contribute to greenhouse gas emissions. 

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Left: a handful of Holopedium from a lake in the Muskoka-Haliburton region of Ontario. Right: a Holopedium up close

Calcium loss turning lakes to ‘jelly’

19 November 2014

Declining calcium levels in some North American lakes are causing major depletions of dominant plankton species, enabling the rapid rise of their ecological competitor: a small jelly-clad invertebrate. Scientists say increasing ‘jellification’ will damage fish stocks and filtration systems that allow lakes to supply drinking water, and that lakes may have been pushed into “an entirely new ecological state”.

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Deforestation starves fish

11 June 2014

Research shows forest debris that drains into lakes is an important contributor to freshwater food chains – bolstering fish diets to the extent that increased forest cover causes fish to get ‘fat’ and sparse forest leaves smaller, underfed fish.

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