Multiple anthropogenic stressors cause ecological surprises in boreal lakes. Christensen, M., R., Graham, M., D., Vinebrooke, R., D., Findlay, D., L., Paterson, M., J., & Turner, M., A. Global Change Biology, 12(12):2316-2322, 2006.
Multiple anthropogenic stressors cause ecological surprises in boreal lakes [pdf]Paper  abstract   bibtex   
The number of combinations of anthropogenic stressors affecting global change is increasing; however, few studies have empirically tested for their interactive effects on ecosystems. Most importantly, interactions among ecological stressors generate nonadditive effects that cannot be easily predicted based on single-stressor studies. Here, we corroborate findings from an in situ mesocosm experiment with evidence from a whole-ecosystem manipulation to demonstrate for the first time that interactions between climate and acidification determine their cumulative impact on the food-web structure of coldwater lakes. Interactions among warming, drought, and acidification, rather than the sum of their individual effects, best explained significant changes in planktonic consumer and producer biomass over a 23-year period. Further, these stressors interactively exerted significant synergistic and antagonistic effects on consumers and producers, respectively. The observed prevalence of long- and short-term ecological surprises involving the cumulative impacts of multiple anthropogenic stressors highlights the high degree of uncertainty surrounding current forecasts of the consequences of global change.
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 year = {2006},
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 keywords = {ACIDIFICATION,CLIMATE,ELA,ENCLOSURES,FIELD EXPERIMENTS,GLOBAL WARMING,L302S,METHODS,PHYTOPLANKTON,TEMPERATURE,ZOOPLANKTON},
 pages = {2316-2322},
 volume = {12},
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 abstract = {The number of combinations of anthropogenic stressors affecting global change is increasing; however, few studies have empirically tested for their interactive effects on ecosystems. Most importantly, interactions among ecological stressors generate nonadditive effects that cannot be easily predicted based on single-stressor studies. Here, we corroborate findings from an in situ mesocosm experiment with evidence from a whole-ecosystem manipulation to demonstrate for the first time that interactions between climate and acidification determine their cumulative impact on the food-web structure of coldwater lakes. Interactions among warming, drought, and acidification, rather than the sum of their individual effects, best explained significant changes in planktonic consumer and producer biomass over a 23-year period. Further, these stressors interactively exerted significant synergistic and antagonistic effects on consumers and producers, respectively. The observed prevalence of long- and short-term ecological surprises involving the cumulative impacts of multiple anthropogenic stressors highlights the high degree of uncertainty surrounding current forecasts of the consequences of global change.},
 bibtype = {article},
 author = {Christensen, M. R. and Graham, M. D. and Vinebrooke, R. D. and Findlay, D. L. and Paterson, M. J. and Turner, M. A.},
 journal = {Global Change Biology},
 number = {12}
}
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