FN Archimer Export Format PT J TI Assessing sea floor functional biodiversity and vulnerability BT AF BEAUCHARD, Olivier THOMPSON, Murray S. A. ELLINGSEN, Kari E. PIET, Gerjan LAFFARGUE, Pascal SOETAERT, Karline AS 1:1,2;2:3;3:4;4:5;5:6;6:1,2; FF 1:;2:;3:;4:;5:PDG-RBE-HALGO-EMH;6:; C1 Netherlands Institute for Sea Research and Utrecht University, Department of Estuarine and Delta Systems, Yerseke 4401 NT, The Netherlands Netherlands Institute for Sea Research and Utrecht University, Department of Estuarine and Delta Systems, Yerseke 4401 NT, The Netherlands Centre for Environment, Fisheries and Aquaculture Science (CEFAS), Lowestoft Laboratory, Lowestoft NR33 0HT, UK Norwegian Institute for Nature Research (NINA), 9296 Tromsø, Norway Wageningen Marine Research, Wageningen University & Research, IJmuiden 1970 AB, The Netherlands IFREMER, Laboratoire Ecologie et Modèles pour l’Halieutique, 44311 Nantes, France C2 INST SEA RESEARCH (NIOZ), NETHERLANDS UNIV UTRECHT, NETHERLANDS CEFAS, UK NORWEGIAN INST NAT RES NINA, NORWAY UNIV WAGENINGEN & RES CTR, NETHERLANDS IFREMER, FRANCE SI NANTES SE PDG-RBE-HALGO-EMH UM DECOD IN WOS Ifremer UMR copubli-europe IF 2.5 TC 2 UR https://archimer.ifremer.fr/doc/00842/95378/103150.pdf https://archimer.ifremer.fr/doc/00842/95378/103151.xlsx https://archimer.ifremer.fr/doc/00842/95378/103152.pdf https://archimer.ifremer.fr/doc/00842/95378/103153.pdf https://archimer.ifremer.fr/doc/00842/95378/103154.pdf LA English DT Article DE ;Benthic invertebrate;Effect trait;Ecosystem engineering;Ecosystem function;Functional group;Functional diversity;Vulnerability AB The marine benthos has been largely studied through the use of response traits that characterise species vulnerability to disturbance. More limited has been the specific use of effect traits that represent other species descriptors and that express ecosystem functions. On the sea floor, the benthos is a key ecosystem-engineering component for which functions can be relevantly derived from effect traits. This study provides a typology of sea floor functions based on an extensive data compilation of effect traits. We classified 812 benthic invertebrate species from the northeast Atlantic by 15 effect traits expressing substratum alteration and habitat creation. Cluster analysis identified 15 species groups that represented various epi- or endobenthic functions. Beyond function-habitat specificity, we show that soft sediment species exhibited broader functional niches in the trait space that increase multi-functionality, and were endowed with rare combinations of traits that expanded the functional extent of the species assemblage. As a consequence, soft sediments can host a higher functional diversity than hard substrata because a wider range of above- and below-substratum activities are possible in soft bottoms. Based on response traits documented for the same species and used to express vulnerability to natural or human-induced disturbance, we then show that vulnerability within sea floor functions can be considerably variable. This can be a consequence of the independence between the evolutionary nature of response traits and the contingent engineering abilities of benthic species through effect traits. The paper provides theoretical and utilitarian clarifications on this trait dichotomy. PY 2023 PD MAR SO Marine Ecology Progress Series SN 0171-8630 PU Inter-research VL 708 UT 000989709200002 BP 21 EP 43 DI 10.3354/meps14270 ID 95378 ER EF