New research sets off alarm bells

A team of researchers from Queen카지노 게임 컬렉션�s 카지노게임사이트 and Environment and Climate Change Canada have shown that accelerated 21st -century warming has triggered a striking shift in algal composition in Great Slave Lake, North America카지노 게임 컬렉션�s deepest lake, and one of the world카지노 게임 컬렉션�s iconic 카지노 게임 컬렉션�northern Great Lakes.카지노 게임 컬렉션�

The research team used information preserved in dated lake sediment cores as an archive of past ecosystems changes. They showed that a rapid restructuring of algal communities has occurred, clearly linked to declining lake ice cover and other climate-related changes, which were unparalleled over at least the last 200 years.

Arctic temperatures have risen by as much as four times the global average over recent decades, with a notable acceleration since the beginning of the 2000s.

These changes at the base of the food chain have unknown ramifications for fisheries and aquatic ecosystem functioning and hence their impacts on First Nations, Métis, and other northern communities. Great Slave Lake also supports the largest commercial, recreational, and Indigenous freshwater fishery in the Northwest Territories, with approximately 60 per cent of the territory카지노 게임 컬렉션�s population living near the shorelines of the lake.

카지노 게임 컬렉션�Such a pronounced change at the base of the food chain is a clear indication that this 카지노 게임 컬렉션�northern Great Lake카지노 게임 컬렉션� is entering a new ecological regime,카지노 게임 컬렉션� explains Dr. Kathleen Rühland, lead author and a senior research scientist at Queen카지노 게임 컬렉션�s 카지노게임사이트카지노 게임 컬렉션�s Paleoecological Environmental Assessment and Research Lab (PEARL). 카지노 게임 컬렉션�These microscopic algae are fundamental to lake ecosystem functioning and these big shifts are a sure sign that the entire lake is changing and changing fast.카지노 게임 컬렉션�

There is very limited data on northern lakes, and much of what is currently known about Great Slave Lake can be attributed to detailed studies by the late D.S. Rawson (카지노게임사이트 of Saskatchewan) and his colleagues during the 1940s and 1950s. These and other historical lake surveys allowed the researchers to ground-truth (information that is known to be real or true, provided by direct observation and measurement) their paleolimnological (lake sediment) findings.

The biggest takeaway of the current study is how rapidly changes have occurred in the biological communities of this lake, crossing important ecological thresholds.

카지노 게임 컬렉션�Our previous work has shown that recent warming has resulted in shorter ice cover periods and other predictable changes in many small and medium-sized lakes throughout the Arctic, with important ecological repercussions,카지노 게임 컬렉션� says co-author Dr. John Smol, Professor of Biology at Queen카지노 게임 컬렉션�s and co-director of PEARL. 카지노 게임 컬렉션�In contrast, very large, deep and (until recently) extensively ice-covered northern lakes such as Great Slave Lake have been partly sheltered from climate warming but are now entering a new ecological state.카지노 게임 컬렉션�

The research was published in .