FN Archimer Export Format PT J TI Multiple phytoplankton community responses to environmental change in a temperate coastal system: A trait-based approach BT AF Breton, Elsa Goberville, Eric Sautour, Benoit Ouadi, Anis Skouroliakou, Dimitra-Ioli Seuront, Laurent Beaugrand, Gregory Kléparski, Loïck Crouvoisier, Muriel Pecqueur, David Salmeron, Christophe Cauvin, Arnaud Poquet, Adrien Garcia, Nicole Gohin, Francis Christaki, Urania AS 1:1;2:2;3:3;4:3;5:1;6:1,4,5;7:1;8:1,6;9:1;10:7;11:7;12:1;13:1,8;14:9;15:10;16:1; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;14:;15:PDG-ODE-DYNECO-PELAGOS;16:; C1 Univ. Littoral Côte d’Opale, CNRS, Univ. Lille, UMR 8187 LOG, Wimereux, France Unité Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Muséum National d’Histoire Naturelle, CNRS, IRD, Sorbonne Université, Université de Caen Normandie, Université des Antilles, Paris, France Univ. Bordeaux, CNRS, UMR 5805 EPOC, Rue Geoffroy Saint Hilaire – Bâtiment B18N, Pessac, France Department of Marine Resources and Energy, Tokyo University of Marine Science and Technology, Tokyo, Japan Department of Zoology and Entomology, Rhodes University, Grahamstown, South Africa Continuous Plankton Recorder (CPR) Survey, Marine Biological Association, Plymouth, United Kingdom Observatoire Océanologique de Banyuls s/mer, FR 3724 - Laboratoire Arago - SU/CNRS, avenue Pierre Fabre Bât B, Banyuls sur Mer, France Univ. Côte d’Azur, CNRS, INSERM, IRCAN, Medical School of Nice, Nice, France Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO, Marseille, France Laboratoire d’écologie pélagique, IFREMER, DYNECO PELAGOS, CS 10070-29280 Plouzané, Brittany, France C2 UNIV LITTORAL COTE D'OPALE, FRANCE MNHN, FRANCE UNIV BORDEAUX, FRANCE UNIV TOKYO, JAPAN UNIV RHODES, SOUTH AFRICA MBA, UK UNIV SORBONNE, FRANCE UNIV NICE, FRANCE UNIV AIX MARSEILLE, FRANCE IFREMER, FRANCE SI BREST SE PDG-ODE-DYNECO-PELAGOS IN WOS Ifremer UPR DOAJ copubli-france copubli-europe copubli-univ-france copubli-int-hors-europe copubli-sud IF 3.7 TC 3 UR https://archimer.ifremer.fr/doc/00797/90893/96528.pdf https://archimer.ifremer.fr/doc/00797/90893/96529.zip LA English DT Article DE ;biodiversity;community assembly;diatoms;environmental change;functional traits;Phaeocystis;phytoplankton community;temporal niche partitioning AB The effect of environmental change in structuring the phytoplankton communities of the coastal waters of the Eastern English Channel was investigated by applying a trait-based approach on two decades (1996-2019) of monitoring on diatoms and Phaeocystis. We show that phytoplankton species richness in an unbalanced nutrient supply context was influenced by wind-driven processes, ecological specialization for dissolved inorganic phosphorous, temporal niche differentiation, and a competition-defense and/or a growth-defense trade-off, a coexistence mechanism where weak competitors (i.e., slower growing) are better protected against predation. Under the influence of both environmental perturbations (e.g., wind-driven processes, freshwater influence, unbalanced nutrient levels) and biotic interactions (e.g., competition, predation, facilitation), phytoplankton species exhibited specific survival strategies such as investment on growth, adaptation and tolerance of species to environmental stresses, silicification and resource specialization. These strategies have led to more speciose communities, higher productivity, functional redundancy and stability in the last decade. Our results revealed that the unbalanced nutrient reduction facilitated Phaeocystis blooms and that anthropogenic climate warming and nitrate reduction may threaten the diatom communities of the eastern English Channel in a near future. Our results provide strong support for biogeographical historical and niche-based processes in structuring the phytoplankton community in this temperate region. The variety of species responses that we characterized in this region may help to better understand future changes in pelagic ecosystems, and can serve as a basis to consider functional approaches for future ecosystem management. PY 2022 PD OCT SO Frontiers In Marine Science SN 2296-7745 PU Frontiers Media SA VL 9 UT 000874544500001 DI 10.3389/fmars.2022.914475 ID 90893 ER EF