Der Klimawandel treibt einen großen Algen an, der in Kanadas Seen studiert. In den letzten 150 Jahren stieg die Algenspiegel des Forschers in den meisten kanadischen Seen an

Algal growth is accelerating in lakes across Canada, including those far from human development, and a new study shows that climate change is the primary driver.

A research team led by scientists at McGill University and Université Laval examined lake sediment cores from 80 lakes across Canada to uncover long-term changes in algae levels. The study, published in Communications Earth & Environment, reveals a dramatic uptick in lake algae production since the 1960s.

“Over the past 150 years, we’ve seen algae levels rise in most Canadian lakes, but in the 1960s, algae levels accelerated dramatically, increasing at a rate seven times faster than before,” said Irene Gregory-Eaves, co-author and biology professor at McGill. “What was most surprising is that this happened even in remote lakes, far from any immediate sources of human pollution or development.”

To identify the cause of these changes, the team combined the study of natural archives – lake sediment cores that date back to the 1800s – with machine learning techniques to detect long-term trends. They then compared those algae records with historical data on air temperature, solar radiation, and nearby human activity.

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