FN Archimer Export Format PT J TI Trait‐based approach to monitoring marine benthic data along 500 km of coastline BT AF Boyé, Aurelien Thiébaut, Éric Grall, Jacques Legendre, Pierre Broudin, Caroline Houbin, Céline Le Garrec, Vincent Maguer, Marion Droual, Gabin Gauthier, Olivier AS 1:1,2;2:3;3:1,4;4:2;5:5;6:5;7:4;8:4;9:4;10:1,4; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:; C1 CNRS IRD Ifremer LEMAR Univ Brest Plouzane, France Département de Sciences Biologiques Université de Montréal Montréal QC, Canada Laboratoire Adaptation et Diversité en Milieu Marin UMR 7144 CNRS Station Biologique de Roscoff Sorbonne Université Roscoff Cedex, France CNRS UMS 3113 Observatoire Marin Suivis Habitats Benthiques OSU‐IUEM Université de Brest Plouzané ,France CNRS Station Biologique de Roscoff FR 2424 Sorbonne Université Roscoff ,France C2 UBO, FRANCE UNIV MONTREAL, CANADA UNIV PARIS 06, FRANCE UBO, FRANCE CNRS, FRANCE UM LEMAR IN WOS Cotutelle UMR DOAJ copubli-france copubli-univ-france copubli-int-hors-europe IF 3.993 TC 32 UR https://archimer.ifremer.fr/doc/00515/62688/67074.pdf https://archimer.ifremer.fr/doc/00515/62688/67075.pdf LA English DT Article CR HABENT REBENT 2014 REBENT 2017 BIS BO Thalia DE ;beta diversity;biotic homogenization;broad-scale monitoring;community assembly;coralline algae;ecosystem engineers;functional diversity;Zostera marina AB Aim β diversity and its linkages with ecosystem functioning remain poorly documented. This impedes our capacity to predict biodiversity changes and how they affect ecosystem functioning at scales relevant for conservation. Here, we address the functional implications of ongoing seafloor changes by characterizing at regional scale the taxonomic and functional α and β diversities of benthic habitats currently threatened by biotic homogenization. Location Western Europe. Methods Combining a trait‐based approach to benthic community monitoring data covering a 7‐year period and 500 km of coast, we explored the mechanisms governing community assembly in habitats associated with two types of foundation species, intertidal seagrass and subtidal maerl beds, compared to bare sediment at similar tidal level. We assessed their spatial and temporal variability and linked these mechanisms to their repercussions at regional scale through analyses of taxonomic and functional β diversity. Results Foundation species locally promote taxonomic and functional diversity. Maerl fine‐scale heterogeneity promotes niche diversity and leads to high functional redundancy for the whole subtidal compartment, providing insurance for seafloor functioning. Seagrass high diversity seems more reliant on transient species and is associated with redundancy of only a few functions. Maintaining the seascapes in which seagrass are embedded seems essential to ensure their long‐term functioning. At regional scale, the locally poorer bare sediment harbour similar functional richness as biogenic habitats because of higher within‐habitat β diversity. Main conclusions Our study reinforces the conservation value of biogenic habitats but highlights that different mechanisms underlie their local diversity, which has implications for the vulnerabilities of their associated communities. Accounting for β diversity at regional scale also stressed a potential underrated conservation value of bare sediment for benthic ecosystem functioning. Coupling trait‐based approaches to monitoring data can help link broad‐scale β diversity to its underlying drivers, bringing local mechanistic understanding closer to the scales at which biodiversity loss and management actions occur. PY 2019 PD DEC SO Diversity And Distributions SN 1366-9516 PU Wiley VL 25 IS 12 UT 000486807000001 BP 1879 EP 1896 DI 10.1111/ddi.12987 ID 62688 ER EF