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conference contribution
posted on 2024-03-15, 07:28authored byAlida Bundy, Sheila J.J. Heymans, Lyne Morissette, Claude Savenkoff
No abstracts are to be cited without prior reference to the author.
The facts: four NW Atlantic ecosystems, three cod stock collapses fifteen 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.
History
Symposia
2007 Annual Science Conference, Helsinki, Finland
Session
Theme Session D: Comparative marine ecosystems structure and function; descriptors and characteristics
Abstract reference
D:15
Recommended citation
[Authors]. 2007. Seals, cod and forage fish: a comparative exploration of variations in the theme of stock collapse and ecosystem change in NW Atlantic ecosystems . 2007 Annual Science Conference, Helsinki, Finland. CM 2007/D:15. https://doi.org/10.17895/ices.pub.25257631