Anthropogenic climate change has altered primary productivity in Lake Superior
| Autor: | Sergei Katsev, Molly D. O'Beirne, Thomas C. Johnson, Euan D. Reavie, Robert E. Hecky, Josef P. Werne |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Multidisciplinary
010504 meteorology & atmospheric sciences Ecology Limnology Science Global warming General Physics and Astronomy Climate change General Chemistry 010501 environmental sciences 15. Life on land 01 natural sciences Article 6. Clean water General Biochemistry Genetics and Molecular Biology Carbon cycle Productivity (ecology) 13. Climate action parasitic diseases Paleoclimatology Environmental science Ecosystem Holocene 0105 earth and related environmental sciences |
| Zdroj: | Nature Communications, Vol 8, Iss 1, Pp 1-8 (2017) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Anthropogenic climate change has the potential to alter many facets of Earth's freshwater resources, especially lacustrine ecosystems. The effects of anthropogenic changes in Lake Superior, which is Earth's largest freshwater lake by area, are not well documented (spatially or temporally) and predicted future states in response to climate change vary. Here we show that Lake Superior experienced a slow, steady increase in production throughout the Holocene using (paleo)productivity proxies in lacustrine sediments to reconstruct past changes in primary production. Furthermore, data from the last century indicate a rapid increase in primary production, which we attribute to increasing surface water temperatures and longer seasonal stratification related to longer ice-free periods in Lake Superior due to anthropogenic climate warming. These observations demonstrate that anthropogenic effects have become a prominent influence on one of Earth's largest, most pristine lacustrine ecosystems. The impacts of climate change on the Great Lakes' ecosystems compared to historical records are unclear. Here, using paleolimnological evidence, the authors show that Lake Superior experienced a slow increase in productivity throughout the Holocene, but that this rate has increased in the last century. |
| Databáze: | OpenAIRE |
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