A General-Purpose Biotic Index to Measure Changes in Benthic Habitat Quality across Several Pressure Gradients

Type Article
Date 2021-06
Language English
Author(s) Labrune Céline1, Gauthier Olivier2, 3, Conde Anxo1, Grall Jacques2, 3, Blomqvist Mats4, Bernard Guillaume5, Gallon Régis2, 3, 6, Dannheim Jennifer7, 8, Van Hoey Gert9, Gremare Antoine10
Affiliation(s) 1 : Sorbonne Université, CNRS, Laboratoire d’Ecogéochimie des Environnements Benthiques, LECOB UMR 8222, F-66650 Banyuls-sur-Mer, France
2 : LEMAR, Univ Brest, CNRS, IRD, Ifremer, 29280 Plouzané, France
3 : OSU IUEM, Univ Brest, CNRS, IRD, 29280 Plouzané, France
4 : Hafok AB, 179 61 Stenhamra, Sweden
5 : CNRS, EPOC, UMR 5805, Station Marine d’Arcachon, 2 Rue du Professeur Jolyet, 33120 Arcachon, France
6 : Conservatoire National des Arts et Métiers/INTECHMER–Laboratoire Universitaire des Sciences Appliquées de Cherbourg LUSAC, UNICAEN, 51000 Cherbourg, France
7 : Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, 27570 Bremerhaven, Germany
8 : Helmholtz Institute for Functional Marine Biodiversity, 26129 Oldenburg, Germany
9 : The Flanders Research Institute for Agriculture, Fisheries and Food, Animal Science Department, 8400 Oostende, Belgium
10 : University of Bordeaux, EPOC, UMR 5805, Station Marine d’Arcachon, 2 Rue du Professeur Jolyet, 33120 Arcachon, France
Source Journal Of Marine Science And Engineering (2077-1312) (MDPI), 2021-06 , Vol. 9 , N. 6 , P. 654 (24p.)
DOI 10.3390/jmse9060654
Note This article belongs to the Special Issue Benthic Biology and Biogeochemistry
Keyword(s) macrofauna, ROC curves, signal detection theory, GPBI, M-AMBI, TDI, physical disturbance, Marine Strategy Framework Directive
Abstract

Realistic assessments of the ecological status of benthic habitats, as requested by European directives such as the Water Framework Directive and the European Marine Strategy Framework Directive, require biotic indices capable of detecting anthropogenic impact without having preliminary knowledge of the occurring pressures. In this context, a new general-purpose biotic index (GPBI) based on the deviation of benthic macrofauna community composition and structure from a valid reference (i.e., good ecological status) is proposed. GPBI is based on the assumption that as a site becomes impacted by a pressure, the most sensitive species are the first to disappear, and that stronger impacts lead to more important losses. Thus, it explicitly uses the within-species loss of individuals in the tested station in comparison to one or several reference stations as the basis of ecological status assessment. In this study, GPBI is successfully used in four case studies considering the impact of diversified pressures on benthic fauna: (1) maerl extraction in the northern Bay of Biscay, (2–3) dredging and trawling in the North Sea, and (4) hypoxic events at the seafloor in the Gullmarfjord. Our results show that GPBI was able to efficiently detect the impact of the different physical disturbances as well as that of hypoxia and that it performs better than commonly used pressure-specific indices (M-AMBI and TDI). Signal detection theory was used to propose a sound good/moderate ecological quality status boundary, and recommendations for future monitoring are also provided based on the reported performance of GPBI.

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How to cite 

Labrune Céline, Gauthier Olivier, Conde Anxo, Grall Jacques, Blomqvist Mats, Bernard Guillaume, Gallon Régis, Dannheim Jennifer, Van Hoey Gert, Gremare Antoine (2021). A General-Purpose Biotic Index to Measure Changes in Benthic Habitat Quality across Several Pressure Gradients. Journal Of Marine Science And Engineering, 9(6), 654 (24p.). Publisher's official version : https://doi.org/10.3390/jmse9060654 , Open Access version : https://archimer.ifremer.fr/doc/00698/81050/