Short-term response of benthic foraminifera to fine-sediment depositional events simulated in microcosm

International audience A microcosm experiment was designed to describe how benthic foraminifera react to fine-sediment deposits varying in frequency and intensity as they may occur regularly or occasionally in coastal benthic environments, caused by discharges from (e.g.) river flooding, tidewater g...

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Published in:Biogeosciences
Main Authors: Guilhermic, Corentin, Nardelli, Maria Pia, Mouret, Aurélia, Le Moigne, Damien, Howa, Hélène
Other Authors: Laboratoire de Planétologie et Géosciences UMR_C 6112 (LPG), Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST), Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ), Laboratoire de Planétologie et Géosciences - Angers (LPG-ANGERS), Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2023
Subjects:
Online Access:https://hal.science/hal-04216794
https://hal.science/hal-04216794/document
https://hal.science/hal-04216794/file/Guilhermic%20et%20al.%20-%202023%20-%20Short-term%20response%20of%20benthic%20foraminifera%20to%20fin.pdf
https://doi.org/10.5194/bg-20-3329-2023
id ftunimainelemans:oai:HAL:hal-04216794v1
record_format openpolar
institution Open Polar
collection Le Mans Université: Archives Ouvertes (HAL)
op_collection_id ftunimainelemans
language English
topic [SDE.BE]Environmental Sciences/Biodiversity and Ecology
spellingShingle [SDE.BE]Environmental Sciences/Biodiversity and Ecology
Guilhermic, Corentin
Nardelli, Maria Pia
Mouret, Aurélia
Le Moigne, Damien
Howa, Hélène
Short-term response of benthic foraminifera to fine-sediment depositional events simulated in microcosm
topic_facet [SDE.BE]Environmental Sciences/Biodiversity and Ecology
description International audience A microcosm experiment was designed to describe how benthic foraminifera react to fine-sediment deposits varying in frequency and intensity as they may occur regularly or occasionally in coastal benthic environments, caused by discharges from (e.g.) river flooding, tidewater glacier melting in polar regions, or diverse anthropic activities linked to harbour or watershed management. The influence of seabed burial resulting from these events on the ecology of benthic ecosystems is often overlooked, and the resilience of benthic communities is poorly known. During a 51 d long experiment, a typical northeastern Atlantic intertidal foraminiferal community, mainly represented by Ammonia confertitesta and Haynesina germanica species, was subjected to two kinds of sedimentary disturbance: (1) a one-time high-volume (OHV) deposit, i.e. sediment about 3 cm thick was added at one time at the beginning of the experiment; and (2) frequent low-volume (FLV) deposits, i.e. sediment about 0.5 cm thick was added each week for 4 weeks. The geochemical environment (e.g. dissolved oxygen penetration in the sediment, salinity, temperature, and nutrient content in the supernatant water) was monitored to follow the microcosm steady state before and during the experiment. In both disturbed microcosms, H. germanica showed a significant linear decrease in abundance during the experiment, while the total abundance of foraminifera was significantly affected only by the OHV treatment, suggesting a stronger effect of a single thick deposit on standing stocks and biodiversity compared to frequent low-volume sediment supplies. Concerning the vertical migration of foraminifera after sedimentary disturbances, the two dominant species moved upwards to the water–sediment interface with migration speeds estimated to be 0.41 and 0.47 mm h−1 respectively for A. confertitesta and H. germanica. In the FLV treatment, the resilient state was already reached within 1 d following a low-thickness burial, while in the OHV, it was ...
author2 Laboratoire de Planétologie et Géosciences UMR_C 6112 (LPG)
Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST)
Nantes Université - pôle Sciences et technologie
Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie
Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)
Laboratoire de Planétologie et Géosciences - Angers (LPG-ANGERS)
Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST)
format Article in Journal/Newspaper
author Guilhermic, Corentin
Nardelli, Maria Pia
Mouret, Aurélia
Le Moigne, Damien
Howa, Hélène
author_facet Guilhermic, Corentin
Nardelli, Maria Pia
Mouret, Aurélia
Le Moigne, Damien
Howa, Hélène
author_sort Guilhermic, Corentin
title Short-term response of benthic foraminifera to fine-sediment depositional events simulated in microcosm
title_short Short-term response of benthic foraminifera to fine-sediment depositional events simulated in microcosm
title_full Short-term response of benthic foraminifera to fine-sediment depositional events simulated in microcosm
title_fullStr Short-term response of benthic foraminifera to fine-sediment depositional events simulated in microcosm
title_full_unstemmed Short-term response of benthic foraminifera to fine-sediment depositional events simulated in microcosm
title_sort short-term response of benthic foraminifera to fine-sediment depositional events simulated in microcosm
publisher HAL CCSD
publishDate 2023
url https://hal.science/hal-04216794
https://hal.science/hal-04216794/document
https://hal.science/hal-04216794/file/Guilhermic%20et%20al.%20-%202023%20-%20Short-term%20response%20of%20benthic%20foraminifera%20to%20fin.pdf
https://doi.org/10.5194/bg-20-3329-2023
genre Tidewater
genre_facet Tidewater
op_source ISSN: 1726-4170
EISSN: 1726-4189
Biogeosciences
https://hal.science/hal-04216794
Biogeosciences, 2023, 20 (15), pp.3329-3351. ⟨10.5194/bg-20-3329-2023⟩
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https://hal.science/hal-04216794
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spelling ftunimainelemans:oai:HAL:hal-04216794v1 2024-02-11T10:09:09+01:00 Short-term response of benthic foraminifera to fine-sediment depositional events simulated in microcosm Guilhermic, Corentin Nardelli, Maria Pia Mouret, Aurélia Le Moigne, Damien Howa, Hélène Laboratoire de Planétologie et Géosciences UMR_C 6112 (LPG) Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST) Nantes Université - pôle Sciences et technologie Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ) Laboratoire de Planétologie et Géosciences - Angers (LPG-ANGERS) Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST) 2023-08-11 https://hal.science/hal-04216794 https://hal.science/hal-04216794/document https://hal.science/hal-04216794/file/Guilhermic%20et%20al.%20-%202023%20-%20Short-term%20response%20of%20benthic%20foraminifera%20to%20fin.pdf https://doi.org/10.5194/bg-20-3329-2023 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-20-3329-2023 hal-04216794 https://hal.science/hal-04216794 https://hal.science/hal-04216794/document https://hal.science/hal-04216794/file/Guilhermic%20et%20al.%20-%202023%20-%20Short-term%20response%20of%20benthic%20foraminifera%20to%20fin.pdf doi:10.5194/bg-20-3329-2023 info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-04216794 Biogeosciences, 2023, 20 (15), pp.3329-3351. ⟨10.5194/bg-20-3329-2023⟩ [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2023 ftunimainelemans https://doi.org/10.5194/bg-20-3329-2023 2024-01-24T17:37:36Z International audience A microcosm experiment was designed to describe how benthic foraminifera react to fine-sediment deposits varying in frequency and intensity as they may occur regularly or occasionally in coastal benthic environments, caused by discharges from (e.g.) river flooding, tidewater glacier melting in polar regions, or diverse anthropic activities linked to harbour or watershed management. The influence of seabed burial resulting from these events on the ecology of benthic ecosystems is often overlooked, and the resilience of benthic communities is poorly known. During a 51 d long experiment, a typical northeastern Atlantic intertidal foraminiferal community, mainly represented by Ammonia confertitesta and Haynesina germanica species, was subjected to two kinds of sedimentary disturbance: (1) a one-time high-volume (OHV) deposit, i.e. sediment about 3 cm thick was added at one time at the beginning of the experiment; and (2) frequent low-volume (FLV) deposits, i.e. sediment about 0.5 cm thick was added each week for 4 weeks. The geochemical environment (e.g. dissolved oxygen penetration in the sediment, salinity, temperature, and nutrient content in the supernatant water) was monitored to follow the microcosm steady state before and during the experiment. In both disturbed microcosms, H. germanica showed a significant linear decrease in abundance during the experiment, while the total abundance of foraminifera was significantly affected only by the OHV treatment, suggesting a stronger effect of a single thick deposit on standing stocks and biodiversity compared to frequent low-volume sediment supplies. Concerning the vertical migration of foraminifera after sedimentary disturbances, the two dominant species moved upwards to the water–sediment interface with migration speeds estimated to be 0.41 and 0.47 mm h−1 respectively for A. confertitesta and H. germanica. In the FLV treatment, the resilient state was already reached within 1 d following a low-thickness burial, while in the OHV, it was ... Article in Journal/Newspaper Tidewater Le Mans Université: Archives Ouvertes (HAL) Biogeosciences 20 15 3329 3351