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Mediterranean marine copepods: basin-scale trends of the calanoid Centropages typicus

Abstract : The Mediterranean Sea is located in a crossroad of mid-latitude and subtropical climatic modes that enhance contrasting environmental conditions over both latitudinal and longitudinal ranges. Here, we show that the large-scale environmental forcing is reflected in the basin scale trends of the adult population of the calanoid copepod Centropages typicus. The species is distributed over the whole Mediterranean basin, and maximal abundances were found in the north-western basin associated to oceanic fronts, and in the Adriatic Sea associated to shallow and semi enclosed waters. The peak of main abundances of C. typicus correlates with the latitudinal temperature gradient and the highest seasonal abundances occurred in spring within the 14-18A degrees C temperature window. Such thermal cline may define the latitudinal geographic region where C. typicus seasonally dominates the > 200 mu m-sized spring copepod community in the Mediterranean Sea. The approach used here is generally applicable to investigate the large-scale spatial patterns of other planktonic organisms and to identify favourable environmental windows for population development.
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J. C. Molinero, V. Vukanic, D. Lucic, F. Ibanez, P. Nival, et al.. Mediterranean marine copepods: basin-scale trends of the calanoid Centropages typicus. HYDROBIOLOGIA, 2009, 617, pp.41-53. ⟨10.1007/s10750-008-9524-8⟩. ⟨hal-03505033⟩



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