FN Archimer Export Format
PT J
TI Abrupt shifts in the Gironde fish community: an indicator of ecological changes in an estuarine ecosystem
BT 
AF CHEVILLOT, Xavier
   PIERRE, Maud
   RIGAUD, Arthur
   DROUINEAU, Hilaire
   CHAALALI, Aurelie
   SAUTOUR, Benoit
   LOBRY, Jeremy
AS 1:1;2:1;3:1;4:1;5:2;6:3;7:1;
FF 1:;2:;3:;4:;5:PDG-RBE-EMH;6:;7:;
C1 Irstea, UR EABX, 50 Ave Verdun, F-33612 Cestas, France.
   IFREMER, Dept Ecol & Modeles Halieut, Rue Ile dYeu,BP 21105, F-44311 Nantes, France.
   Univ Bordeaux, Environm & Paleoenvironm Ocean & Continentaux, CNRS UMR EPOC 5805, Stn Marine Arcachon, 2 Rue Pr Jolyet, F-33120 Arcachon, France.
C2 IRSTEA, FRANCE
   IFREMER, FRANCE
   UNIV BORDEAUX, FRANCE
SI NANTES
SE PDG-RBE-EMH
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-p187
   copubli-univ-france
IF 2.292
TC 19
UR https://archimer.ifremer.fr/doc/00334/44567/44282.pdf
   https://archimer.ifremer.fr/doc/00334/44567/44283.pdf
LA English
DT Article
DE ;Ecosystem state;Fish diversity;Estuary;Generalised linear mixed models;GLMM;Time series;Shift;Inter-shift periods
AB For decades, global climate change has directly and indirectly affected the structure and function of ecosystems. Abrupt changes in biodiversity have been observed in response to linear or sudden modifications to the environment. These abrupt shifts can cause long-term reorganizations within ecosystems, with communities exhibiting new functional responses to environmental factors. Over the last 3 decades, the Gironde estuary in southwest France has experienced 2 abrupt shifts in both the physical and chemical environments and the pelagic community. Rather than describing these shifts and their origins, we focused on the 3 inter-shift periods, describing the structure of the fish community and its relationship with the environment during these periods. We described fish biodiversity using a limited set of descriptors, taking into account both species composition and relative species abundances. Inter-shift ecosystem states were defined based on the relationship between this description and the hydro-physico-chemical variables and climatic indices defining the main features of the environment. This relationship was described using generalized linear mixed models on the entire time series and for each inter-shift period. Our results indicate that (1) the fish community structure has been significantly modified, (2) environmental drivers influencing fish diversity have changed during these 3 periods, and (3) the fish-environment relationships have been modified over time. From this, we conclude a regime shift has occurred in the Gironde estuary. We also highlight that anthropogenic influences have increased, which re-emphasizes the importance of local management in maintaining fish diversity and associated goods and services within the context of climate change.
PY 2016
PD MAY
SO Marine Ecology Progress Series
SN 0171-8630
PU Inter-research
VL 549
UT 000376376200012
BP 137
EP 151
DI 10.3354/meps11681
ID 44567
ER

EF