Seals, cod an forage fish: a comparative exploration of variations in the theme on stock collapse and ecosystem change in northwest Atlantic ecosystems.

A Bundy, Sheila Heymans, Lynne Morissette, Claude Savenkoff

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

The facts: four Northwest Atlantic ecosystems, three cod stock collapses 15 years ago (plus one severely depleted), seals now top predator in all ecosystems, all had cod as a top predator before collapse, groundfish declines in all areas, forage base increased in most systems. No recovery in any system. Have these ecosystems fundamentally changed? Why? The challenge: compare and contrast these four ecosystems. The answer: using mass balance models, empirical data and a suite of ecosystem indicators, we explore how and why these systems have changed over time. At the ecosystem and community level, we see broad similarities between ecosystems. However, structurally and functionally these systems have shifted to an alternate state, with changes in predator structure, trophic structure and flow. Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)188-206
Number of pages19
JournalPROG OCEANOGR
Issue number1
Publication statusPublished - 2009

Keywords

  • COMMUNITIES
  • 1990S
  • EASTERN SCOTIAN SHELF
  • SOUTHERN GULF
  • PREDATION
  • TROPHIC FLOWS
  • MODELS
  • INDICATORS
  • Oceanography
  • NETWORK ANALYSIS
  • ST-LAWRENCE

Fingerprint Dive into the research topics of 'Seals, cod an forage fish: a comparative exploration of variations in the theme on stock collapse and ecosystem change in northwest Atlantic ecosystems.'. Together they form a unique fingerprint.

Cite this