Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Trend analysis of indicators: a comparison of recent changes in the status of marine ecosystems around the world
Blanchard, J.L.; Coll, M.; Trenkel, V.M.; Vergnon, R.; Yemane, D.; Jouffre, D.; Link, J.S.; Shin, Y.-J. (2010). Trend analysis of indicators: a comparison of recent changes in the status of marine ecosystems around the world. ICES J. Mar. Sci./J. Cons. int. Explor. Mer 67(4): 732-744. http://dx.doi.org/10.1093/icesjms/fsp282
In: ICES Journal of Marine Science. Academic Press: London. ISSN 1054-3139; e-ISSN 1095-9289
|   |
| Trefwoorden |
Ecosystems
Indicators
Management > Resource management > Fishery management
Marien/Kust |
| Author keywords |
community; ecological indicators; ecosystem-based fisheries management;ecosystem effects of fishing; natural resource management |
| Auteurs | | Top |
- Blanchard, J.L.
- Coll, M.
- Trenkel, V.M.
- Vergnon, R.
|
- Yemane, D.
- Jouffre, D.
- Link, J.S.
- Shin, Y.-J.
|
|
| Abstract |
Time-series of ecological and exploitation indicators collected from 19 ecosystems were analysed to investigate whether there have been temporal trends in the status of fish communities. Using linear and non-linear statistical methods, trends are reported for six indicators (mean length of fish in the community, mean lifespan, proportion of predatory fish, total biomass of surveyed species, mean trophic level of landings, and inverse fishing pressure), and the redundancy of these indicators across ecosystems is evaluated. The expected direction of change for an ecosystem that is increasingly impacted by fishing is a decline in all indicators. A mixture of negative and positive directions of change is recorded, both within and among all ecosystems considered. No consistent patterns in the redundancy of the ecological indicators across ecosystems emerged from the analyses, confirming that each indicator provided complementary information on ecosystem status. The different trends in indicators may reflect differing historical exploitation patterns, management, and environmental regimes in these systems. Commitment to monitoring programmes and development of system-specific baseline, target, and threshold reference levels are required. Improved understanding of the responsiveness and performance of ecological indicators to management actions are needed to address adequately whether ecosystems are recovering from, or being further impacted by, fishing, and whether management targets are being met. The relative effects of multiple environmental and ecological processes as well as multiple human-induced stressors that characterize exploited ecosystems also need to be quantified. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
