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| Cury, Philippe; Boyd, Ian L.; Bonhommeau, Sylvain; Anker-nilssen, Tycho; Crawford, Robert J. M.; Furness, Robert W.; Mills, James A.; Murphy, Eugene J.; Oesterblom, Henrik; Paleczny, Michelle; Piatt, John F.; Roux, Jean-paul; Shannon, Lynne; Sydeman, William J.. |
| Determining the form of key predator-prey relationships is critical for understanding marine ecosystem dynamics. Using a comprehensive global database, we quantified the effect of fluctuations in food abundance on seabird breeding success. We identified a threshold in prey (fish and krill, termed "forage fish") abundance below which seabirds experience consistently reduced and more variable productivity. This response was common to all seven ecosystems and 14 bird species examined within the Atlantic, Pacific, and Southern Oceans. The threshold approximated one-third of the maximum prey biomass observed in long-term studies. This provides an indicator of the minimal forage fish biomass needed to sustain seabird productivity over the long term. |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00056/16770/14307.pdf |
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| Planque, Benjamin; Fromentin, Jean-marc; Cury, Philippe; Drinkwater, Kenneth F.; Jennings, Simon; Perry, R. Ian; Kifani, Souad. |
| Evidence has accumulated that climate variability influences the state and functioning of marine ecosystems. At the same time increasing pressure from exploitation and other human activities has been shown to impact exploited and non-exploited species and potentially modify ecosystem structure. There has been a tendency among marine scientists to pose the question as a dichotomy, i.e., whether (1) "natural" climate variability or (2) fishery exploitation bears the primary responsibility for population declines in fish populations and the associated ecosystem changes. However, effects of both climate and exploitation are probably substantially involved in most cases. More importantly, climate and exploitation interact in their effects, such that climate may... |
| Tipo: Text |
Palavras-chave: Resilience; Marine ecosystems; Demography; Climate fishing interactions. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/2010/publication-7384.pdf |
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| Weber, Jacques; Betsch, Jean Marie; Cury, Philippe. |
| As the third millennium draws near, industrial societies are becoming aware of the limits of what they can do to constrain the biosphere, ending up where "primitive" societies left off. If the perverse effects of a century of technical revolution and economic expansion are above all perceptible in the area of multiple contaminations that put in danger the well-being of people, environments and in a general way the biosphere's functioning, they also concern the standardisation of products and landscapes and overinvestment in the means of exploiting resources (inputs increasing more rapidly than outputs, when they are not bringing about their decrease). The search for solutions to the growing imbalance of the relationships Man Nature Resources cannot... |
| Tipo: Text |
Palavras-chave: SEM. |
| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/1990/acte-2416.pdf |
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| Perry, R. Ian; Cury, Philippe; Brander, Keith; Jennings, Simon; Moellmann, Christian; Planque, Benjamin. |
| Modern fisheries research and management must understand and take account of the interactions between climate and fishing, rather than try to disentangle their effects and address each separately. These interactions are significant drivers of change in exploited marine systems and have ramifications for ecosystems and those who depend on the services they provide. We discuss how fishing and climate forcing interact on individual fish, marine populations, marine communities, and ecosystems to bring these levels into states that are more sensitive to (i.e. more strongly related with) climate forcing. Fishing is unlikely to alter the sensitivities of individual finfish and invertebrates to climate forcing. It will remove individuals with specific... |
| Tipo: Text |
Palavras-chave: Climate variability; Climate change; Communities; Ecosystems; Fisheries management; Fishing; Populations. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00000/11141/9343.pdf |
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