FN Archimer Export Format PT J TI Spatial pattern in species richness of demersal fish assemblages on the continental shelf of the northern Mediterranean Sea: a multiscale analysis BT AF GAERTNER, J BERTRAND, Jacques RELINI, G PAPACONSTANTINOU, C MAZOUNI, N DE SOLA, L DURBEC, J JUKIC PELADIC, S SOUPLET, Arnauld AS 1:1;2:2;3:3;4:4;5:5;6:6;7:1;8:7;9:8; FF 1:;2:PDG-DOP-DCM;3:;4:;5:;6:;7:;8:;9:PDG-DOP-DCM-HMT-RHSETE; C1 CNRS, UMR 6117, LMGEM, Ctr Oceanol Marseille, F-13007 Marseille, France. IFREMER, Lab Ecol Halieutique, F-44311 Nantes, France. Univ Genoa, I-16126 Genoa, Italy. NCMR, Aghios Kosmas Hellinikion, GR-16644 Athens, Greece. Cepralmar, F-34000 Montpellier, France. Ctr Oceanograph Malaga, Malaga, Spain. Inst Oceanografiju Ribarstvo, Split 21000, Croatia. IFREMER, Lab Ressources Halieutiques, F-34203 Sete, France. C2 CNRS, FRANCE IFREMER, FRANCE UNIV GENOVA, ITALY NCMR, GREECE CEPRALMAR, FRANCE IEO, SPAIN INST OCEANOGRAFIJU RIBARSTVO, CROATIA IFREMER, FRANCE SI MARTINIQUE SETE SE PDG-DOP-DCM PDG-DOP-DCM-HMT-RHSETE IN WOS Ifremer jusqu'en 2018 copubli-france copubli-europe copubli-int-hors-europe IF 2.546 TC 26 TU CNRS IFREMER IRD UNIVERSITE AIX-MARSEILLE UNIVERSITE TOULON UR https://archimer.ifremer.fr/doc/2007/publication-3569.pdf LA English DT Article CR MEDITS / FR MEDITS 2004 MEDITS 2005 MEDITS 2006 MEDITS FR MEDITS FR MEDITS-FR2000 MEDITS-FR2001 MEDITS-FR2002 MEDITS-FR2003 MEDITS-FR97 MEDITS-FR98 MEDITS-FR99 BO L'Europe DE ;Lessepsian;Large scale;Mediterranean Sea;Groundfishes;Beta diversity;Species richness AB The species richness pattern of groundfish species in the entire northern Mediterranean Sea was examined at 3 spatial scales: region, large biogeographical zone and basin. We analysed 1914 trawl hauls collected using a single sampling design in the trawlable areas of the continental shelves between the Strait of Gibraltar and the Strait of Dardanelles (from 36.3 to 45.7 degrees N and 5.3 degrees W to 28 E). Spatial pattern in species diversity was assessed using complementary methods (Chao2 estimates of total species richness, mean species richness and beta diversity). No matter which scale was used, the expected longitudinally decreasing trend in species richness, which has been widely described in previous studies, did not appear when comparing estimates of total species richness per unit of area. Only the mean species richness pattern showed a moderate eastwards decrease at the largest spatial scale, but the trend progressively disappeared as the scale of analysis was reduced. In contrast to what is usually expected, our results suggest that Atlantic inflow does not play a key role in the present spatial pattern of fish species richness within the northern Mediterranean Sea. Furthermore, we show that the Aegean Sea can no longer be considered the least species-diverse zone in the northern Mediterranean Sea. Our results provide the first description of a quantitative 'reference state', with which the temporal changes in species richness patterns throughout the entire northern Mediterranean Sea can be compared in the future. PY 2007 PD JUN SO Marine Ecology Progress Series SN 0171-8630 PU Inter-Research VL 341 UT 000248392300016 BP 191 EP 203 DI 10.3354/meps341191 ID 3569 ER EF