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Marine Ecology Progress Series

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MEPS 714:105-111 (2023)  -  DOI:

Taxonomic surrogates for long-term macrobenthic community monitoring: an application with community trajectory analysis

Chirine Toumi1,*, Olivier Gauthier1,2, Éric Thiébaut3,4, Clément Guedes1, Jacques Grall1,2

1LEMAR, Univ Brest, CNRS, IRD, Ifremer, 29280 Plouzané, France
2OSU IUEM, Univ Brest, CNRS, IRD, 29280 Plouzané, France
3Sorbonne Université, CNRS, Station Biologique de Roscoff, UMR7144, Adaptation et Diversité en Milieu Marin, Place Georges Teissier, CS90074, 29688 Roscoff Cedex, France
4Sorbonne Université, CNRS, OSU STAMAR, UAR2017, 4 Place Jussieu, 75252 Paris Cedex 05, France
*Corresponding author:

ABSTRACT: Biodiversity monitoring, essential to detect impacts of natural and anthropogenic changes on marine ecosystems, is costly, time-consuming and requires high taxonomic expertise. Taxonomic surrogacy might be a solution to overcome these problems and accurately reflect species-level community patterns, but its efficiency has mainly been assessed as taxonomic sufficiency and rarely from long-term monitoring data. Here, the efficiency of subset taxa (i.e. Polychaeta, Crustacea and Mollusca) for summarizing long-term community dynamics was tested in different coastal habitats. The data set came from a yearly long-term macrobenthic monitoring programme (2007-2019) in western France, in 2 biogenic and 2 bare habitats. Community trajectory analysis (CTA), a statistical approach allowing for quantitative measures and comparisons of temporal trajectories, was used to test for similitudes between overall community, subset-taxa and non-subset-taxa dynamics. Polychaeta best reflected the spatial diversity of the different sites as well as the temporal dynamics of the non-Polychaeta species, with more efficiency in biogenic compared to bare habitats. Our study confirmed that the subset-taxon method may reflect long-term benthic habitat dynamics and that CTA is an effective tool to test their efficiency.

KEY WORDS: Taxonomic surrogacy · Community trajectory analysis · Benthic macrofauna · Monitoring

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Cite this article as: Toumi C, Gauthier O, Thiébaut É, Guedes C, Grall J (2023) Taxonomic surrogates for long-term macrobenthic community monitoring: an application with community trajectory analysis. Mar Ecol Prog Ser 714:105-111.

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