Journal
MARINE POLLUTION BULLETIN
Volume 76, Issue 1-2, Pages 203-213Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2013.08.041
Keywords
Diadema africana; Trophic cascades; Conservation status; Zoning impacts; Canary Islands; NE Atlantic Ocean
Funding
- Reserva Mundial de la Biosfera La Palma
- Fundacion Biodiversidad (from the Spanish Ministry of Agriculture, food and Environmental Affairs)
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In this paper we develop a tool to assess the impact of fishing on ecosystem functioning in shallow rocky reefs. The relationships between biological parameters (fishes, sea urchins, seaweeds), and fishing activities (fish traps, boats, land-based fishing, spearfishing) were tested in La Palma island (Canary Islands). Data from fishing activities and biological parameters were analyzed using principal component analyses. We produced two models using the first component of these analyses. This component was interpreted as a new variable that described the fishing pressure and the conservation status at each studied site. Subsequently the scores on the first axis were mapped using universal kriging methods and the models obtained were extrapolated across the whole island to display the expected fishing pressure and conservation status more widely. The fishing pressure and conservation status models were spatially related; zones where fishing pressure was high coincided with zones in the unhealthiest ecological state. (C) 2013 Elsevier Ltd. All rights reserved.
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