Experimental climate change weakens the insurance effect of biodiversity.
Summary of "Experimental climate change weakens the insurance effect of biodiversity."
Ecosystems are simultaneously affected by biodiversity loss and climate change, but we know little about how these factors interact. We predicted that climate warming and CO (2) -enrichment should strengthen trophic cascades by reducing the relative efficiency of predation-resistant herbivores, if herbivore consumption rate trades off with predation resistance. This weakens the insurance effect of herbivore diversity. We tested this prediction using experimental ocean warming and acidification in seagrass mesocosms. Meta-analyses of published experiments first indicated that consumption rate trades off with predation resistance. The experiment then showed that three common herbivores together controlled macroalgae and facilitated seagrass dominance, regardless of climate change. When the predation-vulnerable herbivore was excluded in normal conditions, the two resistant herbivores maintained top-down control. Under warming, however, increased algal growth outstripped control by herbivores and the system became algal-dominated. Consequently, climate change can reduce the relative efficiency of resistant herbivores and weaken the insurance effect of biodiversity.
Department of Biological and Environmental Sciences - Kristineberg, University of Gothenburg, 451 78, Fiskebäckskil, Sweden; Department of Systems Ecology, Stockholm University, 106 91, Stockholm, Sweden.
This article was published in the following journal.
Name: Ecology letters
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/22676312
- DOI: http://dx.doi.org/10.1111/j.1461-0248.2012.01810.x
Medical and Biotech [MESH] Definitions
Any significant change in measures of climate (such as temperature, precipitation, or wind) lasting for an extended period (decades or longer). It may result from natural factors such as changes in the sun's intensity, natural processes within the climate system such as changes in ocean circulation, or human activities.
A type of climate characterized by insufficient moisture to support appreciable plant life. It is a climate of extreme aridity, usually of extreme heat, and of negligible rainfall. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Life Change Events
Those occurrences, including social, psychological, and environmental, which require an adjustment or effect a change in an individual's pattern of living.
Health Insurance Portability And Accountability Act
Public Law 104-91, enacted in 1996, is designed to protect health insurance coverage for workers and their families when they change or lose their jobs. HIPAA has separate provisions for the large and small group markets, and the individual market. HIPAA amends the Employee Retirement Income Security Act (ERISA), the Public Health Service Act, and the Internal Revenue Code to provide improved portability and continuity of health insurance coverage, extending earlier provisions under the Consolidated Omnibus Budget Reconciliation Act of 1985 ("COBRA").
An animal or plant species in danger of extinction. Causes can include human activity, changing climate, or change in predator/prey ratios.
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