Pubblicazione scientifica

Signatures of the collapse and incipient recovery of an overexploited marine ecosystem

FILONE TECNOLOGICO	TEMA
economia circolare e sostenibilità
produzione e cattura
trasformazione e commercializzazione

RIASSUNTO

The Northwest Atlantic cod stocks collapsed in the early 1990s and have yet to recover, despite the subsequent establishment of a continuing fishing moratorium. Efforts to understand the collapse and lack of recovery have so far focused mainly on the dynamics of commercially harvested species. Here, we use data from a 33-year scientific trawl survey to determine to which degree the signatures of the collapse and recovery of the cod are apparent in the spatial and temporal dynamics of the broader groundfish community. Over this 33-year period, the groundfish community experienced four phases of change: (i) a period of rapid, synchronous biomass collapse in most species, (ii) followed by a regime shift in community composition with a concomitant loss of functional diversity, (iii) followed in turn by periods of slow compositional recovery, and (iv) slow biomass growth. Our results demonstrate how a community-wide perspective can reveal new aspects of the dynamics of collapse and recovery unavailable from the analysis of individual species or a combination of a small number of species. Overall, we found evidence that such community-level signals should be useful for designing more effective management strategies to ensure the persistence of exploited marine ecosystems.

DATA

Data di pubblicazione: 05/07/2017

AUTORI

PEDERSEN ERIC J
THOMPSON PATRICK L
BALL R AARON
FORTIN MARIE-JOSEE
GOUHIER TARIK C
LINK HEIKE
MORITZ CHARLOTTE
NENZEN HEDVIG
STANLEY RYAN R E
TARANU ZOFIA E
GONZALEZ ANDREW
GUICHARD FREDERIC
PEPIN PIERRE

ENTE DI AFFERENZA

Laboratoire d'Excellence ‘CORAIL’ Guadeloupe France
DEPT BIOLOGY MCGILL UNIV MONTREAL QUEBEC CANADA
CTR LIMNOLOGY UNIV WISCONSIN MADISON MADISON WI USA
DEPT ECOLOGY & EVOLUTIONARY BIOLOGY UNIV TORONTO TORONTO ONTARIO CANADA
MARINE SCIENCE CTR NORTHEASTERN UNIV NAHANT MA USA
INST ECOSYSTEM RSCH KIEL UNIV KIEL GERMANY
PSL RSCH UNIV EPHE UPVD CNRS USR 3278 CRIOBE BP 1013 PAPETOAI 98729 MOOREA FRENCH POLYNESIA
DEPT SCIENCES BIOLOGIQUES UNIV QUEBEC A MONTREAL MONTREAL QUEBEC CANADA
FISHERIES & OCEANS CANADA BEDFORD INST OCEANOGRAPHY DARTMOUTH NOVA SCOTIA CANADA
DEPT SCIENCES BIOLOGIQUES UNIV MONTREAL MONTREAL QUEBEC CANADA
FISHERIES & OCEANS CANADA NORTHWEST ATLANTIC FISHERIES CTR ST JOHNS NEWFOUNDLAND & LABRADOR CANADA

RIVISTA

Royal Society Open Science, 4(7), 170215

IMPACT FACTOR

2,680

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