Habitats as Surrogates of Taxonomic and Functional Fish Assemblages in Coral Reef Ecosystems: A Critical Analysis of Factors Driving Effectiveness

Type Article
Date 2012-07
Language English
Author(s) Van Wynsberge Simon1, Andréfouët Serge1, Hamel Mélanie A.1, 2, Kulbicki Michel1, Ferse Sebastian C. A.1
Affiliation(s) 1 : UR-CoRéUs, IRD (Institut de Recherche pour le Développement), Nouméa, New Caledonia
2 : ARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Australia
Source PLoS ONE (1932-6203) (Public Library of Science (PLoS)), 2012-07 , Vol. 7 , N. 7 , P. e40997 (11p.)
DOI 10.1371/journal.pone.0040997
WOS© Times Cited 17
Abstract

Species check-lists are helpful to establish Marine Protected Areas (MPAs) and protect local richness, endemicity, rarity, and biodiversity in general. However, such exhaustive taxonomic lists (i.e., true surrogate of biodiversity) require extensive and expensive censuses, and the use of estimator surrogates (e.g., habitats) is an appealing alternative. In truth, surrogate effectiveness appears from the literature highly variable both in marine and terrestrial ecosystems, making it difficult to provide practical recommendations for managers. Here, we evaluate how the biodiversity reference data set and its inherent bias can influence effectiveness. Specifically, we defined habitats by geomorphology, rugosity, and benthic cover and architecture criteria, and mapped them with satellite images for a New-Caledonian site. Fish taxonomic and functional lists were elaborated from Underwater Visual Censuses, stratified according to geomorphology and exposure. We then tested if MPA networks designed to maximize habitat richness, diversity and rarity could also effectively maximize fish richness, diversity, and rarity. Effectiveness appeared highly sensitive to the fish census design itself, in relation to the type of habitat map used and the scale of analysis. Spatial distribution of habitats (estimator surrogate’s distribution), quantity and location of fish census stations (target surrogate’s sampling), and random processes in the MPA design all affected effectiveness to the point that one small change in the data set could lead to opposite conclusions. We suggest that previous conclusions on surrogacy effectiveness, either positive or negative, marine or terrestrial, should be considered with caution, except in instances where very dense data sets were used without pseudo-replication. Although this does not rule out the validity of using surrogates of species lists for conservation planning, the critical joint examination of both target and estimator surrogates is needed for every case study.

Full Text
File Pages Size Access
Publisher's official version 11 523 KB Open access
Figure S1. A: Species accumulation curve obtained by iterative addition of random selection of stations (100 runs). 985 KB Open access
Table S1. Number of fish sampling stations according to reef type and wind exposure. 25 KB Open access
File S1. Detailed description of the fish sampling design. 19 KB Open access
Top of the page

How to cite 

Van Wynsberge Simon, Andréfouët Serge, Hamel Mélanie A., Kulbicki Michel, Ferse Sebastian C. A. (2012). Habitats as Surrogates of Taxonomic and Functional Fish Assemblages in Coral Reef Ecosystems: A Critical Analysis of Factors Driving Effectiveness. PLoS ONE, 7(7), e40997 (11p.). Publisher's official version : https://doi.org/10.1371/journal.pone.0040997 , Open Access version : https://archimer.ifremer.fr/doc/00738/85051/