FN Archimer Export Format
PT J
TI How Do Fishing and Environmental Effects Propagate Among and Within Functional Groups?
BT 
AF ROCHET, Marie-Joelle
   COLLIE, Jeremy S.
   TRENKEL, Verena
AS 1:1;2:2;3:1;
FF 1:PDG-RBE-EMH;2:;3:PDG-RBE-EMH;
C1 IFREMER, F-44311 Nantes 3, France.
   Univ Rhode Isl, Grad Sch Oceanog, Narragansett, RI 02882 USA.
C2 IFREMER, FRANCE
   UNIV RHODE ISL, USA
SI NANTES
SE PDG-RBE-EMH
IN WOS Ifremer jusqu'en 2018
   copubli-int-hors-europe
IF 1.333
TC 16
UR https://archimer.ifremer.fr/doc/00154/26492/25465.pdf
LA English
DT Article
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BO Thalassa
AB Competition and predation can play different roles in mediating the influence of external pressures, such as fishing or environmental variations, on marine communities. Pressure effects propagate through food webs along predation links. These predator-prey interactions may result in trophic cascades, but they can be buffered by competitive interactions. We investigated these mechanisms by taking a functional-group approach. Are functional groups affected by external pressures in a predictable way? Within functional groups, do all species respond in the same way, or does competitive release allow for compensation among species? We constructed a simple community model, with functional groups connected by predation links. Loop analysis was used to make qualitative predictions of the changes in functional groups that might result through either direct or indirect effects from changes in pressures. Actual changes in biomass and average weight in functional groups were then tracked from fish trawl-survey data; compensation within groups was examined with dynamic factor analysis. This approach was applied to the Georges Bank, Bay of Biscay, and North Sea fish communities, which have been subject to different fishing regimes and have undergone environmental changes over the last decades. All three communities changed substantially. Compensation did not prevent impacts from propagating through the three food webs; rather, antagonistic pressures did. Community responses to perturbation were mostly determined by community structure and by fisheries selectivity with respect to both functional groups and species.
PY 2013
PD JAN
SO Bulletin Of Marine Science
SN 0007-4977
PU Rosenstiel Sch Mar Atmos Sci
VL 89
IS 1
UT 000325306300014
BP 285
EP 315
DI 10.5343/bms.2011.1138
ID 26492
ER

EF