Consequences of climate warming and lake acidification for UV-B penetration in North American boreal lakes

被引:401
作者
Schindler, DW [1 ]
Curtis, PJ [1 ]
Parker, BR [1 ]
Stainton, MP [1 ]
机构
[1] FISHERIES & OCEANS CANADA,INST FRESHWATER,WINNIPEG,MB R3T 2N6,CANADA
关键词
D O I
10.1038/379705a0
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
CLIMATE warming, acid deposition and increasing exposure to ultraviolet radiation are all regarded as widespread problems in boreal ecosystems. Here we report observations from twenty years of whole-lake acidification experiments, which show that these three problems are intimately linked, In our study area in northwestern Ontario, both climate warming and lake acidification led to declines in the dissolved organic carbon content of lake waters, allowing increased penetration of solar radiation, We suggest that some of the changes in aquatic ecosystems that have been attributed to lake acidification may in fact have involved increased exposure to ultraviolet light. Moreover, it seems that-particularly in clear, shallow lakes and streams-climate warming and/or acidification can be more effective than stratospheric ozone depletion in increasing the exposure of aquatic organisms to biologically effective UV-B radiation.
引用
收藏
页码:705 / 708
页数:4
相关论文
共 40 条
[1]  
[Anonymous], 1994, ARCH HYDROBIOL
[2]  
BAKER JP, 1990, ACIDIC DEPOSITION ST, pCH13
[3]   ECOSYSTEM RESPONSE TO SOLAR ULTRAVIOLET-B RADIATION - INFLUENCE OF TROPHIC-LEVEL INTERACTIONS [J].
BOTHWELL, ML ;
SHERBOT, DMJ ;
POLLOCK, CM .
SCIENCE, 1994, 265 (5168) :97-100
[4]   EFFECTS OF WHOLE-LAKE BASE ADDITION ON THE OPTICAL-PROPERTIES OF 3 CLEARWATER ACIDIC LAKES [J].
BUKAVECKAS, PA ;
DRISCOLL, CT .
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 1991, 48 (06) :1030-1040
[5]   PHOTOCHEMICAL FORMATION OF H2O2 IN NATURAL-WATERS EXPOSED TO SUNLIGHT [J].
COOPER, WJ ;
ZIKA, RG ;
PETASNE, RG ;
PLANE, JMC .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1988, 22 (10) :1156-1160
[6]  
COOPER WJ, 1992, ENCY EARTH SYSTEM SC, V2, P527
[7]  
CURTIS PJ, IN PRESS BIOGEOCHEMI
[9]  
DILLON PJ, IN PRESS BIOGEOCHEMI
[10]   SEASONAL AND LONG-TERM TEMPORAL PATTERNS IN THE CHEMISTRY OF ADIRONDACK LAKES [J].
DRISCOLL, CT ;
VANDREASON, R .
WATER AIR AND SOIL POLLUTION, 1993, 67 (3-4) :319-344