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ID: 361819.0, MPI für Evolutionsbiologie / Ecophysiology
Importance of genetic diversity in eelgrass Zostera marina for its resilience to global warming
Authors:Ehlers, Anneli; Worm, Boris; Reusch, Thorsten B. H.
Date of Publication (YYYY-MM-DD):2008-02-26
Title of Journal:Marine Ecology Progress Series
Journal Abbrev.:Mar Ecol Prog Ser
Start Page:1
End Page:7
Review Status:not specified
Audience:Not Specified
Abstract / Description:Effects of global warming on marine ecosystems are far less understood than they are in terrestrial environments. Macrophyte-based coastal ecosystems are particularly vulnerable to global warming, because they often lack species redundancy. We tested whether summer heat waves have negative effects on an ecologically important ecosystem engineer, the eelgrass Zostera marina L., and whether high genotypic diversity may provide resilience in the face of climatic extremes. In a mesocosm experiment, we manipulated genotypic diversity of eelgrass patches fully crossed with water temperature (control vs. temperature stress) over 5 mo. We found a strong negative effect of warming and a positive effect of genotypic diversity on shoot densities of eelgrass. These results suggest that eelgrass meadows and associated ecosystem services will be negatively affected by predicted increases in summer temperature extremes. Genotypic diversity may provide critical response diversity for maintaining seagrass ecosystem functioning, and for adaptation to environmental change.
Free Keywords:climate change; ocean warming; coastal ecosystem; genotypic diversity; intraspecific variation; resilience; zostera marina
External Publication Status:published
Document Type:Article
Affiliations:MPI für Evolutionsbiologie/Abt. Ökophysiologie
External Affiliations:IFM Geomar, Leibniz Inst Marine Sci, Dusternbrooker Weg 20, D-24105 Kiel, Germany; Dalhousie Univ, Dept Biol, Halifax, NS B3H 4J1 Canada; Univ Münster, Inst Evolut & Biodivers, D-48149 Münster, Germany
Identifiers:ISSN:0171-8630 [ID-No:1]
DOI:10.3354/meps07369 [ID-No:2]
LOCALID:2607/S 38772 [Listen-Nummer/S-Nummer]
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