Lakes as sentinels and integrators for the effects of climate change on watersheds, airsheds, and landscapes

被引:232
作者
Schindler, D. W. [1 ]
机构
[1] Univ Alberta, Dept Biol Sci, Edmonton, AB, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
DISSOLVED ORGANIC-CARBON; FRESH-WATER; ORGANOCHLORINE COMPOUNDS; FOREST-FIRE; ULTRAVIOLET-RADIATION; GREENHOUSE GASES; BOREAL FOREST; ACCUMULATION; MERCURY; AREA;
D O I
10.4319/lo.2009.54.6_part_2.2349
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Lakes provide unique sentinels and integrators of events in their catchments and airsheds and in the total landscapes in which they are embedded. A variety of physical, chemical, and biological properties of lakes are amenable to simple, precise, and inexpensive long-term monitoring. Changes to watersheds caused by climate warming can in turn affect the properties of lakes to which they drain. Examples include changes to nutrient inputs, the balance between base cations and strong acid anions, carbon cycles, and mercury, in some cases associated with insect outbreaks and forest fires caused by warmer weather. Paleolimnology also allows integration and interpretation of changes in lakes and catchments for millennia. Such studies indicate that much drier conditions occurred in the past in central and western Canada, causing the closing of lake basins, increased salinity, eutrophication, and even the disappearance of some lakes, as forested catchments were invaded by grasslands. Such historical perspectives indicate that large areas of western Canada may be adversely affected by climate warming.
引用
收藏
页码:2349 / 2358
页数:10
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