Food web changes in arctic ecosystems related to climate warming

被引:59
作者
Quinlan, R
Douglas, MSV
Smol, JP
机构
[1] Univ Toronto, Dept Geol, Paleoenvironm Assessment Lab, Toronto, ON, Canada
[2] Queens Univ, Dept Biol, Paleoecol Environm Assessment & Res Lab, Kingston, ON K7L 3N6, Canada
关键词
Arctic; Canada; Chironomidae; climate change; food webs; paleoecology; paleolimnology; ponds;
D O I
10.1111/j.1365-2486.2005.00981.x
中图分类号
X176 [生物多样性保护];
学科分类号
090705 ;
摘要
Sedimentary records from three Canadian High Arctic ponds on Ellesmere Island, spanning the last several thousand years, show major shifts in pond communities within the last similar to 200 years. These paleolimnological data indicate that aquatic insect (Diptera: Chironomidae) populations rapidly expanded and greatly increased in community diversity beginning in the 19th century. These invertebrate changes coincided with striking shifts in algal (diatom) populations, indicating strong food-web effects because of climate warming and reduced ice-cover in ponds. Predicted future warming in the Arctic may produce ecological changes that exceed the large shifts that have already occurred since the 19th century.
引用
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页码:1381 / 1386
页数:6
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