Quantifying maerl (rhodolith) habitat complexity along an environmental gradient at regional scale in the Northeast Atlantic
International audience Maerl beds are ecologically important marine biogenic habitats founded on a few species of free-living coralline algae that aggregate and form highly complex rhodoliths. The high biodiversity found in these habitats have been mainly justified by the structural complexity that...
Published in: | Marine Environmental Research |
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Main Authors: | , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2022
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Online Access: | https://hal.univ-brest.fr/hal-04157995 https://hal.univ-brest.fr/hal-04157995/document https://hal.univ-brest.fr/hal-04157995/file/Marine%20Environmental%20Research%20181%20%282022%29%20105768%20lic%20CC.pdf https://doi.org/10.1016/j.marenvres.2022.105768 |
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ftunivlyon:oai:HAL:hal-04157995v1 |
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openpolar |
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Open Polar |
collection |
Université de Lyon: HAL |
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ftunivlyon |
language |
English |
topic |
Coralline algae Environmental gradient Foundation species Fractal dimension Habitat complexity Rhodolith beds [SDE]Environmental Sciences |
spellingShingle |
Coralline algae Environmental gradient Foundation species Fractal dimension Habitat complexity Rhodolith beds [SDE]Environmental Sciences Jardim, Victor, Gauthier, Olivier Toumi, Chirine Grall, Jacques Quantifying maerl (rhodolith) habitat complexity along an environmental gradient at regional scale in the Northeast Atlantic |
topic_facet |
Coralline algae Environmental gradient Foundation species Fractal dimension Habitat complexity Rhodolith beds [SDE]Environmental Sciences |
description |
International audience Maerl beds are ecologically important marine biogenic habitats founded on a few species of free-living coralline algae that aggregate and form highly complex rhodoliths. The high biodiversity found in these habitats have been mainly justified by the structural complexity that they provide. However, few attempts to quantify this complexity have been made. Maerl species distribution, density, rhodolith growth forms, and shapes vary with environmental conditions. Hydrodynamics and depth have been shown to drive morphology. Using speciesspecific metrics such as sphericity and branching density, as well as diameter and fractal dimension at the rhodolith level, and maerl density at the habitat level, we quantified the habitat complexity within ten maerl beds at a regional scale (along ~400 km of the coastline of Brittany in Western France). Using both long-term monitoring data and environmental models, we investigated how maerl habitat complexity varies among beds and which environmental conditions drive those differences. The effects of currents, exposure to wind-generated waves, temperature and sediment granulometry were evaluated. We confirmed variations in complexity in maerl beds at the habitat and rhodolith levels at local and regional scales, which might have ecological and conservational implications for their associated biodiversity. The analysed environmental conditions drive around a third of the variance in habitat complexity. Sediment granulometry is the main driver of maerl habitat complexity in Brittany, while the isolated effects of depth and hydrodynamics accounted for less than 5% of the variability each. Our results have important implications for paleoecology, and we suggest that maerl facies should be interpreted carefully. Our study provides a first attempt at explicitly quantifying maerl habitat complexity, and further contributes to the understanding of this fundamental ecological question. |
author2 |
Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Ecologie Microbienne - UMR 5557 (LEM) Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Ecole Nationale Vétérinaire de Lyon (ENVL)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017) |
format |
Article in Journal/Newspaper |
author |
Jardim, Victor, Gauthier, Olivier Toumi, Chirine Grall, Jacques |
author_facet |
Jardim, Victor, Gauthier, Olivier Toumi, Chirine Grall, Jacques |
author_sort |
Jardim, Victor, |
title |
Quantifying maerl (rhodolith) habitat complexity along an environmental gradient at regional scale in the Northeast Atlantic |
title_short |
Quantifying maerl (rhodolith) habitat complexity along an environmental gradient at regional scale in the Northeast Atlantic |
title_full |
Quantifying maerl (rhodolith) habitat complexity along an environmental gradient at regional scale in the Northeast Atlantic |
title_fullStr |
Quantifying maerl (rhodolith) habitat complexity along an environmental gradient at regional scale in the Northeast Atlantic |
title_full_unstemmed |
Quantifying maerl (rhodolith) habitat complexity along an environmental gradient at regional scale in the Northeast Atlantic |
title_sort |
quantifying maerl (rhodolith) habitat complexity along an environmental gradient at regional scale in the northeast atlantic |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.univ-brest.fr/hal-04157995 https://hal.univ-brest.fr/hal-04157995/document https://hal.univ-brest.fr/hal-04157995/file/Marine%20Environmental%20Research%20181%20%282022%29%20105768%20lic%20CC.pdf https://doi.org/10.1016/j.marenvres.2022.105768 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
ISSN: 0141-1136 EISSN: 1879-0291 Marine Environmental Research https://hal.univ-brest.fr/hal-04157995 Marine Environmental Research, 2022, 181, ⟨10.1016/j.marenvres.2022.105768⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.marenvres.2022.105768 hal-04157995 https://hal.univ-brest.fr/hal-04157995 https://hal.univ-brest.fr/hal-04157995/document https://hal.univ-brest.fr/hal-04157995/file/Marine%20Environmental%20Research%20181%20%282022%29%20105768%20lic%20CC.pdf doi:10.1016/j.marenvres.2022.105768 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.marenvres.2022.105768 |
container_title |
Marine Environmental Research |
container_volume |
181 |
container_start_page |
105768 |
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1772817952922402816 |
spelling |
ftunivlyon:oai:HAL:hal-04157995v1 2023-07-30T04:05:48+02:00 Quantifying maerl (rhodolith) habitat complexity along an environmental gradient at regional scale in the Northeast Atlantic Jardim, Victor, Gauthier, Olivier Toumi, Chirine Grall, Jacques Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Ecologie Microbienne - UMR 5557 (LEM) Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Ecole Nationale Vétérinaire de Lyon (ENVL)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017) 2022-11 https://hal.univ-brest.fr/hal-04157995 https://hal.univ-brest.fr/hal-04157995/document https://hal.univ-brest.fr/hal-04157995/file/Marine%20Environmental%20Research%20181%20%282022%29%20105768%20lic%20CC.pdf https://doi.org/10.1016/j.marenvres.2022.105768 en eng HAL CCSD Elsevier science info:eu-repo/semantics/altIdentifier/doi/10.1016/j.marenvres.2022.105768 hal-04157995 https://hal.univ-brest.fr/hal-04157995 https://hal.univ-brest.fr/hal-04157995/document https://hal.univ-brest.fr/hal-04157995/file/Marine%20Environmental%20Research%20181%20%282022%29%20105768%20lic%20CC.pdf doi:10.1016/j.marenvres.2022.105768 info:eu-repo/semantics/OpenAccess ISSN: 0141-1136 EISSN: 1879-0291 Marine Environmental Research https://hal.univ-brest.fr/hal-04157995 Marine Environmental Research, 2022, 181, ⟨10.1016/j.marenvres.2022.105768⟩ Coralline algae Environmental gradient Foundation species Fractal dimension Habitat complexity Rhodolith beds [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2022 ftunivlyon https://doi.org/10.1016/j.marenvres.2022.105768 2023-07-12T16:36:38Z International audience Maerl beds are ecologically important marine biogenic habitats founded on a few species of free-living coralline algae that aggregate and form highly complex rhodoliths. The high biodiversity found in these habitats have been mainly justified by the structural complexity that they provide. However, few attempts to quantify this complexity have been made. Maerl species distribution, density, rhodolith growth forms, and shapes vary with environmental conditions. Hydrodynamics and depth have been shown to drive morphology. Using speciesspecific metrics such as sphericity and branching density, as well as diameter and fractal dimension at the rhodolith level, and maerl density at the habitat level, we quantified the habitat complexity within ten maerl beds at a regional scale (along ~400 km of the coastline of Brittany in Western France). Using both long-term monitoring data and environmental models, we investigated how maerl habitat complexity varies among beds and which environmental conditions drive those differences. The effects of currents, exposure to wind-generated waves, temperature and sediment granulometry were evaluated. We confirmed variations in complexity in maerl beds at the habitat and rhodolith levels at local and regional scales, which might have ecological and conservational implications for their associated biodiversity. The analysed environmental conditions drive around a third of the variance in habitat complexity. Sediment granulometry is the main driver of maerl habitat complexity in Brittany, while the isolated effects of depth and hydrodynamics accounted for less than 5% of the variability each. Our results have important implications for paleoecology, and we suggest that maerl facies should be interpreted carefully. Our study provides a first attempt at explicitly quantifying maerl habitat complexity, and further contributes to the understanding of this fundamental ecological question. Article in Journal/Newspaper Northeast Atlantic Université de Lyon: HAL Marine Environmental Research 181 105768 |