Biotic disturbance mitigates effects of multiple stressors in a marine benthic community
International audience Predicting how communities respond to multiple stressors is challenging because community dynamics, stressors, and animal-stressor interactions can vary with environmental conditions, including the intensity of natural disturbance. Nevertheless, environmental laws stipulate th...
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ftunivnantes:oai:HAL:ird-03114524v1 2023-05-15T13:37:14+02:00 Biotic disturbance mitigates effects of multiple stressors in a marine benthic community Lenihan, Hunter, Peterson, Charles, Miller, Robert, Kayal, Mohsen Potoski, Matthew Bren School of Environmental Science and Management University of California Santa Barbara (UC Santa Barbara) University of California (UC)-University of California (UC) 2018-06 https://hal.ird.fr/ird-03114524 https://hal.ird.fr/ird-03114524/document https://hal.ird.fr/ird-03114524/file/2018%20Lenihan%20etal%20Biotic%20disturbance%20mitigates%20multiple%20stressor%20interactions.pdf https://doi.org/10.1002/ecs2.2314 en eng HAL CCSD Ecological Society of America info:eu-repo/semantics/altIdentifier/doi/10.1002/ecs2.2314 ird-03114524 https://hal.ird.fr/ird-03114524 https://hal.ird.fr/ird-03114524/document https://hal.ird.fr/ird-03114524/file/2018%20Lenihan%20etal%20Biotic%20disturbance%20mitigates%20multiple%20stressor%20interactions.pdf doi:10.1002/ecs2.2314 info:eu-repo/semantics/OpenAccess ISSN: 2150-8925 Ecosphere https://hal.ird.fr/ird-03114524 Ecosphere, 2018, 9 (6), pp.e02314. ⟨10.1002/ecs2.2314⟩ Antarctica biotic disturbance community response copper marine invertebrates multiple stressors organic enrichment [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2018 ftunivnantes https://doi.org/10.1002/ecs2.2314 2022-11-30T00:52:36Z International audience Predicting how communities respond to multiple stressors is challenging because community dynamics, stressors, and animal-stressor interactions can vary with environmental conditions, including the intensity of natural disturbance. Nevertheless, environmental laws stipulate that we predict, measure, and mitigate the ecological effects of some human-induced stressors in the environment, including chemical contaminants in aquatic ecosystems. We conducted an experiment in Antarctica to test how a marine soft-sediment benthic community responded to multiple chemical contaminants and biotic disturbance by manipulating organic carbon enrichment, copper metal contamination, access by large epibenthic animals, and their interaction. Biotic disturbance caused mainly by large echinoderms was manipulated with exclusion cages and cage-control treatments. Colonization patterns in sediment trays revealed that total infaunal abundance and arthropods decreased with toxic Cu (0, 100, and 500 ppm) and total organic carbon (TOC; 0%, 1%, and 2% by wt), as enrichment produced increasing levels of sediment hypoxia/anoxia. Annelids and echinoderms decreased with Cu but increased with TOC because many colonizing polychaete worms, seastars, and epifaunal sea urchins were deposit feeders. Bioturbation by echinoderms disturbed sediments, leading to a substantial decline in total infaunal abundance in uncontaminated sediments, but also an increase in the relative abundance in contaminated sediments, as bioturbation mitigated the effect of both chemical stressors. Biotic disturbance also caused substantial shifts in the species composition of the invertebrate assemblages and an overall increase in species diversity. Prior predictions about the response of benthic marine phyla to the separate and combined effects of Cu and carbon enrichment appear robust to variation in natural biotic disturbance. Article in Journal/Newspaper Antarc* Antarctica Université de Nantes: HAL-UNIV-NANTES Ecosphere 9 6 |
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Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
language |
English |
topic |
Antarctica biotic disturbance community response copper marine invertebrates multiple stressors organic enrichment [SDE]Environmental Sciences |
spellingShingle |
Antarctica biotic disturbance community response copper marine invertebrates multiple stressors organic enrichment [SDE]Environmental Sciences Lenihan, Hunter, Peterson, Charles, Miller, Robert, Kayal, Mohsen Potoski, Matthew Biotic disturbance mitigates effects of multiple stressors in a marine benthic community |
topic_facet |
Antarctica biotic disturbance community response copper marine invertebrates multiple stressors organic enrichment [SDE]Environmental Sciences |
description |
International audience Predicting how communities respond to multiple stressors is challenging because community dynamics, stressors, and animal-stressor interactions can vary with environmental conditions, including the intensity of natural disturbance. Nevertheless, environmental laws stipulate that we predict, measure, and mitigate the ecological effects of some human-induced stressors in the environment, including chemical contaminants in aquatic ecosystems. We conducted an experiment in Antarctica to test how a marine soft-sediment benthic community responded to multiple chemical contaminants and biotic disturbance by manipulating organic carbon enrichment, copper metal contamination, access by large epibenthic animals, and their interaction. Biotic disturbance caused mainly by large echinoderms was manipulated with exclusion cages and cage-control treatments. Colonization patterns in sediment trays revealed that total infaunal abundance and arthropods decreased with toxic Cu (0, 100, and 500 ppm) and total organic carbon (TOC; 0%, 1%, and 2% by wt), as enrichment produced increasing levels of sediment hypoxia/anoxia. Annelids and echinoderms decreased with Cu but increased with TOC because many colonizing polychaete worms, seastars, and epifaunal sea urchins were deposit feeders. Bioturbation by echinoderms disturbed sediments, leading to a substantial decline in total infaunal abundance in uncontaminated sediments, but also an increase in the relative abundance in contaminated sediments, as bioturbation mitigated the effect of both chemical stressors. Biotic disturbance also caused substantial shifts in the species composition of the invertebrate assemblages and an overall increase in species diversity. Prior predictions about the response of benthic marine phyla to the separate and combined effects of Cu and carbon enrichment appear robust to variation in natural biotic disturbance. |
author2 |
Bren School of Environmental Science and Management University of California Santa Barbara (UC Santa Barbara) University of California (UC)-University of California (UC) |
format |
Article in Journal/Newspaper |
author |
Lenihan, Hunter, Peterson, Charles, Miller, Robert, Kayal, Mohsen Potoski, Matthew |
author_facet |
Lenihan, Hunter, Peterson, Charles, Miller, Robert, Kayal, Mohsen Potoski, Matthew |
author_sort |
Lenihan, Hunter, |
title |
Biotic disturbance mitigates effects of multiple stressors in a marine benthic community |
title_short |
Biotic disturbance mitigates effects of multiple stressors in a marine benthic community |
title_full |
Biotic disturbance mitigates effects of multiple stressors in a marine benthic community |
title_fullStr |
Biotic disturbance mitigates effects of multiple stressors in a marine benthic community |
title_full_unstemmed |
Biotic disturbance mitigates effects of multiple stressors in a marine benthic community |
title_sort |
biotic disturbance mitigates effects of multiple stressors in a marine benthic community |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.ird.fr/ird-03114524 https://hal.ird.fr/ird-03114524/document https://hal.ird.fr/ird-03114524/file/2018%20Lenihan%20etal%20Biotic%20disturbance%20mitigates%20multiple%20stressor%20interactions.pdf https://doi.org/10.1002/ecs2.2314 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
ISSN: 2150-8925 Ecosphere https://hal.ird.fr/ird-03114524 Ecosphere, 2018, 9 (6), pp.e02314. ⟨10.1002/ecs2.2314⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/ecs2.2314 ird-03114524 https://hal.ird.fr/ird-03114524 https://hal.ird.fr/ird-03114524/document https://hal.ird.fr/ird-03114524/file/2018%20Lenihan%20etal%20Biotic%20disturbance%20mitigates%20multiple%20stressor%20interactions.pdf doi:10.1002/ecs2.2314 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/ecs2.2314 |
container_title |
Ecosphere |
container_volume |
9 |
container_issue |
6 |
_version_ |
1766089565680959488 |