Linking multiple facets of biodiversity and ecosystem functions in a coastal reef habitat

Type Article
Date 2020-12
Language English
Author(s) Jones Auriane1, 2, 3, Denis Lionel4, Fournier Jérôme5, 6, Desroy NicolasORCID2, Duong Gwendoline4, Dubois StanislasORCID1
Affiliation(s) 1 : IFREMER, Laboratoire Centre de Bretagne, DYNECO, Laboratoire d’Ecologie Benthique Côtière (LEBCO), 29280, Plouzané, France
2 : IFREMER, Laboratoire Environnement et Ressources Bretagne nord, BP 80108, 35801, Dinard cedex, France
3 : ESE, Ecology and Ecosystem Health, AGROCAMPUS OUEST, INRA, 65 rue de Saint-Brieuc, 35042, Rennes, France
4 : Univ. Lille, CNRS, Univ. Littoral Côte d’Opale, UMR 8187, LOG, Laboratoire d’Océanologie et de Géosciences, F 62930, Wimereux, France
5 : CNRS, UMR 7204 CESCO, 75005, Paris, France
6 : MNHN, Station de Biologie Marine, BP 225, 29182, Concarneau cedex, France
Source Marine Environmental Research (0141-1136) (Elsevier BV), 2020-12 , Vol. 162 , P. 105092 (16p.)
DOI 10.1016/j.marenvres.2020.105092
Keyword(s) Functional diversity, Biogeochemical fluxes, Respiration, Bioturbation, Community composition, Benthos, Ecosystem engineer, Sabellaria alveolata, English channel
Abstract Reef-building species play key roles in promoting local species richness and regulating ecosystem functions like biogeochemical fluxes. We evaluated the functioning of a habitat engineered by the reef-building polychaete Sabellaria alveolata, by measuring oxygen and nutrient fluxes in the reef structures and in the soft-sediments nearby. Then, we investigated the relative importance of temperature, the engineer S. alveolata, and different facets of macrofauna diversity (taxonomic, functional diversity and identity), on the reef biogeochemical fluxes using multiple linear regressions and effect sizes. The reef fluxes were more intense than the soft-sediment fluxes and mainly driven by the engineer biomass and abundance, stressing the importance of these biogenic structures. Higher water temperatures and an intermediate level of associated macrofauna functional dispersion weighted only by abundance (i.e. intermediate biological trait variability) maximized the reef's global biogeochemical functioning. Ultimately, the physical degradation of the reefs could lead to lower levels of functioning.
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