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Title

Global warming-enhanced stratification and mass mortality events in the Mediterranean

AuthorsComa, Rafael CSIC ORCID ; Ribes, Marta CSIC ORCID ; Serrano, Eduard CSIC ORCID; Jiménez, Eroteida CSIC; Salat, Jordi CSIC ORCID ; Pascual, Josep
KeywordsClimatic anomalies
Summer lengthening
Energetic constraints
Benthic suspension feeders
Extreme events
Issue Date30-Mar-2009
PublisherNational Academy of Sciences (U.S.)
CitationProceedings of the National Academy of Sciences of the USA (PNAS) 106(15): 6176-6181 (2009)
AbstractSummer conditions in the Mediterranean Sea are characterized by high temperatures and low food availability. This leads to "summer dormancy" in many benthic suspension feeders due to energetic constraints. Analysis of the most recent 33-year temperature time series demonstrated enhanced stratification due to global warming, which produced a ≈40% lengthening of summer conditions. Many biological processes are expected to be affected by this trend, culminating in such events as mass mortality of invertebrates. Climatic anomalies concomitant with the occurrence of these events represent prolonged exposure to warmer summer conditions coupled with reduced food resources. Simulation of the effects of these conditions on a model organism demonstrated a biomass loss of >35%. Losses of this magnitude result in mortality similar to that noted in field observations during mass mortality events. These results indicate that temperature anomalies are the underlying cause of the events, with energetic constraints serving as the main triggering mechanism
Description6 pages, 3 figures, 1 table.-- PMID: 19332777 [PubMed].-- PMCID: PMC2669359.-- Supporting information (Suppl. tables S1-S5) available at: http://www.pnas.org/content/106/15/6176/suppl/DCSupplemental
Publisher version (URL)https://doi.org/10.1073/pnas.0805801106
URIhttp://hdl.handle.net/10261/15373
DOI10.1073/pnas.0805801106
ISSN0027-8424
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