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Climate influence on deep sea populations

AutorCompany, Joan B. ; Puig, Pere ; Sardà, Francisco ; Palanques, Albert ; Latasa, Mikel ; Scharek, Renate
Palabras claveEuphotic zone
Lateral particle transport
Deep-sea ecosystems
Aristeus antennatus
Deep-sea shrimp
Climate influence
Population dynamics
Fecha de publicación16-ene-2008
EditorPublic Library of Science
CitaciónPLoS ONE 3(1): e1431 (2008)
ResumenDynamics of biological processes on the deep-sea floor are traditionally thought to be controlled by vertical sinking of particles from the euphotic zone at a seasonal scale. However, little is known about the influence of lateral particle transport from continental margins to deep-sea ecosystems. To address this question, we report here how the formation of dense shelf waters and their subsequent downslope cascade, a climate induced phenomenon, affects the population of the deep-sea shrimp Aristeus antennatus. We found evidence that strong currents associated with intense cascading events correlates with the disappearance of this species from its fishing grounds, producing a temporary fishery collapse. Despite this initial negative effect, landings increase between 3 and 5 years after these major events, preceded by an increase of juveniles. The transport of particulate organic matter associated with cascading appears to enhance the recruitment of this deep-sea living resource, apparently mitigating the general trend of overexploitation. Because cascade of dense water from continental shelves is a global phenomenon, we anticipate that its influence on deep-sea ecosystems and fisheries worldwide should be larger than previously thought.
Descripción8 pages, 5 figures.-- PMID: 18197243 [PubMed].-- PMCID: PMC2174526.
Supporting information (Suppl. figures S1-S9) available at: http://dx.doi.org/10.1371/journal.pone.0001431
Versión del editorhttp://dx.doi.org/10.1371/journal.pone.0001431
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