FN Archimer Export Format PT J TI Cinétique de Abra alba (Mollusque bivalve) de 1977 à 1991 en Manche-Mer du Nord, relation avec les facteurs climatiques OT Changes in abra-alba (mollusca, bivalvia) populations in the english-channel and north-sea, 1977-1991 - relation with climatic factors BT AF DAUVIN, Jean-Claude DEWARUMEZ, Jean-Marie ELKAIM, B BERNARDO, D FROMENTIN, Jean-Marc IBANEZ, F AS 1:;2:;3:;4:;5:;6:; FF 1:;2:;3:;4:;5:;6:; C1 STN MARINE WIMEREUX,CNRS,URA 1363,F-62930 WIMEREUX,FRANCE UNIV PARIS 06,HYDROBIOL LAB,F-75231 PARIS 05,FRANCE STN ZOOL,OBSERV SCI UNIVERS,CNRS,URA 716,F-06230 VILLEFRANCHE MER,FRANCE C2 STN MARINE WIMEREUX,CNRS,URA 1363,F-62930 WIMEREUX,FRANCE UNIV PARIS 06,HYDROBIOL LAB,F-75231 PARIS 05,FRANCE STN ZOOL,OBSERV SCI UNIVERS,CNRS,URA 716,F-06230 VILLEFRANCHE MER,FRANCE IF 0.662 TC 22 UR https://archimer.ifremer.fr/doc/00099/21066/18692.pdf LA French DT Article DE ;ABRA-ALBA;LONG-TERM CHANGES;CYCLES;CLIMATIC STRESS AB Populations of Abra alba (Wood) (Mollusca : Bivalvia) were studied over a fifteen-years period at three sites: the southern part of the North Sea (Gravelines area), the Bay of Seine, and the Bay of Morlaix in the western English Channel. These surveys provide an example of long-term changes in a species considered as ''opportunistic'' and as a ''biological indicator'' of disturbance. A summed cumulated function was used to compare the changes of the Abra alba populations and of mean air temperature in each area. The graph of this function shows the timing and duration of changes. Four or five main periods were identified at each site, with a succession of periods of abundance, stability, and decrease. The abundance periods were separated by ten years in the English Channel (Bays of Seine and Morlaix) and by seven years in the Gravelines region. The Abra alba populations appear to be affected by a combination of three factors : local disturbance, biological interactions (competition and predation), and climatic effects. PY 1993 SO Oceanologica Acta SN 0399-1784 PU Gauthier-Villars VL 16 IS 4 UT A1993MK39500010 BP 413 EP 422 ID 21066 ER EF