Satellite remote sensing reveals a positive impact of living oyster reefs on microalgal biofilm development
Satellite remote sensing (RS) is routinely used for the large-scale monitoring of microphytobenthos (MPB) biomass in intertidal mudflats and has greatly improved our knowledge of MPB spatio-temporal variability and its potential drivers. Processes operating on smaller scales however, such as the imp...
Published in: | Biogeosciences |
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ftccsdartic:oai:HAL:hal-04040681v1 2023-12-17T10:29:16+01:00 Satellite remote sensing reveals a positive impact of living oyster reefs on microalgal biofilm development Echappé, Caroline Gernez, Pierre Méléder, Vona Jesus, Bruno Cognie, Bruno Decottignies, Priscilla Sabbe, Koen Barillé, Laurent Mer, molécules et santé EA 2160 (MMS) Le Mans Université (UM)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Université de Nantes - UFR des Sciences Pharmaceutiques et Biologiques Université de Nantes (UN)-Université de Nantes (UN) Laboratory of Protistology and Aquatic Ecology Universiteit Gent = Ghent University (UGENT) BioISI - Biosystems & Integrative Sciences Institute 2018 https://nantes-universite.hal.science/hal-04040681 https://nantes-universite.hal.science/hal-04040681/document https://nantes-universite.hal.science/hal-04040681/file/bg-15-905-2018.pdf https://doi.org/10.5194/bg-15-905-2018 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-15-905-2018 hal-04040681 https://nantes-universite.hal.science/hal-04040681 https://nantes-universite.hal.science/hal-04040681/document https://nantes-universite.hal.science/hal-04040681/file/bg-15-905-2018.pdf doi:10.5194/bg-15-905-2018 info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://nantes-universite.hal.science/hal-04040681 Biogeosciences, 2018, 15 (3), pp.905-918. ⟨10.5194/bg-15-905-2018⟩ [SDE]Environmental Sciences [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2018 ftccsdartic https://doi.org/10.5194/bg-15-905-2018 2023-11-18T23:50:07Z Satellite remote sensing (RS) is routinely used for the large-scale monitoring of microphytobenthos (MPB) biomass in intertidal mudflats and has greatly improved our knowledge of MPB spatio-temporal variability and its potential drivers. Processes operating on smaller scales however, such as the impact of benthic macrofauna on MPB development, to date remain underinvestigated. In this study, we analysed the influence of wild Crassostrea gigas oyster reefs on MPB biofilm development using multispectral RS. A 30-year time series (1985–2015) combining high-resolution (30 m) Landsat and SPOT data was built in order to explore the relationship between C. gigas reefs and MPB spatial distribution and seasonal dynamics, using the normalized difference vegetation index (NDVI). Emphasis was placed on the analysis of a before–after control-impact (BACI) experiment designed to assess the effect of oyster killing on the surrounding MPB biofilms. Our RS data reveal that the presence of oyster reefs positively affects MPB biofilm development. Analysis of the historical time series first showed the presence of persistent, highly concentrated MPB patches around oyster reefs. This observation was supported by the BACI experiment which showed that killing the oysters (while leaving the physical reef structure, i.e. oyster shells, intact) negatively affected both MPB biofilm biomass and spatial stability around the reef. As such, our results are consistent with the hypothesis of nutrient input as an explanation for the MPB growth-promoting effect of oysters, whereby organic and inorganic matter released through oyster excretion and biodeposition stimulates MPB biomass accumulation. MPB also showed marked seasonal variations in biomass and patch shape, size and degree of aggregation around the oyster reefs. Seasonal variations in biomass, with higher NDVI during spring and autumn, were consistent with those observed on broader scales in other European mudflats. Our study provides the first multi-sensor RS satellite evidence of the ... Article in Journal/Newspaper Crassostrea gigas Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Biogeosciences 15 3 905 918 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDE]Environmental Sciences [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDE]Environmental Sciences [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Echappé, Caroline Gernez, Pierre Méléder, Vona Jesus, Bruno Cognie, Bruno Decottignies, Priscilla Sabbe, Koen Barillé, Laurent Satellite remote sensing reveals a positive impact of living oyster reefs on microalgal biofilm development |
topic_facet |
[SDE]Environmental Sciences [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
Satellite remote sensing (RS) is routinely used for the large-scale monitoring of microphytobenthos (MPB) biomass in intertidal mudflats and has greatly improved our knowledge of MPB spatio-temporal variability and its potential drivers. Processes operating on smaller scales however, such as the impact of benthic macrofauna on MPB development, to date remain underinvestigated. In this study, we analysed the influence of wild Crassostrea gigas oyster reefs on MPB biofilm development using multispectral RS. A 30-year time series (1985–2015) combining high-resolution (30 m) Landsat and SPOT data was built in order to explore the relationship between C. gigas reefs and MPB spatial distribution and seasonal dynamics, using the normalized difference vegetation index (NDVI). Emphasis was placed on the analysis of a before–after control-impact (BACI) experiment designed to assess the effect of oyster killing on the surrounding MPB biofilms. Our RS data reveal that the presence of oyster reefs positively affects MPB biofilm development. Analysis of the historical time series first showed the presence of persistent, highly concentrated MPB patches around oyster reefs. This observation was supported by the BACI experiment which showed that killing the oysters (while leaving the physical reef structure, i.e. oyster shells, intact) negatively affected both MPB biofilm biomass and spatial stability around the reef. As such, our results are consistent with the hypothesis of nutrient input as an explanation for the MPB growth-promoting effect of oysters, whereby organic and inorganic matter released through oyster excretion and biodeposition stimulates MPB biomass accumulation. MPB also showed marked seasonal variations in biomass and patch shape, size and degree of aggregation around the oyster reefs. Seasonal variations in biomass, with higher NDVI during spring and autumn, were consistent with those observed on broader scales in other European mudflats. Our study provides the first multi-sensor RS satellite evidence of the ... |
author2 |
Mer, molécules et santé EA 2160 (MMS) Le Mans Université (UM)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Université de Nantes - UFR des Sciences Pharmaceutiques et Biologiques Université de Nantes (UN)-Université de Nantes (UN) Laboratory of Protistology and Aquatic Ecology Universiteit Gent = Ghent University (UGENT) BioISI - Biosystems & Integrative Sciences Institute |
format |
Article in Journal/Newspaper |
author |
Echappé, Caroline Gernez, Pierre Méléder, Vona Jesus, Bruno Cognie, Bruno Decottignies, Priscilla Sabbe, Koen Barillé, Laurent |
author_facet |
Echappé, Caroline Gernez, Pierre Méléder, Vona Jesus, Bruno Cognie, Bruno Decottignies, Priscilla Sabbe, Koen Barillé, Laurent |
author_sort |
Echappé, Caroline |
title |
Satellite remote sensing reveals a positive impact of living oyster reefs on microalgal biofilm development |
title_short |
Satellite remote sensing reveals a positive impact of living oyster reefs on microalgal biofilm development |
title_full |
Satellite remote sensing reveals a positive impact of living oyster reefs on microalgal biofilm development |
title_fullStr |
Satellite remote sensing reveals a positive impact of living oyster reefs on microalgal biofilm development |
title_full_unstemmed |
Satellite remote sensing reveals a positive impact of living oyster reefs on microalgal biofilm development |
title_sort |
satellite remote sensing reveals a positive impact of living oyster reefs on microalgal biofilm development |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://nantes-universite.hal.science/hal-04040681 https://nantes-universite.hal.science/hal-04040681/document https://nantes-universite.hal.science/hal-04040681/file/bg-15-905-2018.pdf https://doi.org/10.5194/bg-15-905-2018 |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://nantes-universite.hal.science/hal-04040681 Biogeosciences, 2018, 15 (3), pp.905-918. ⟨10.5194/bg-15-905-2018⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-15-905-2018 hal-04040681 https://nantes-universite.hal.science/hal-04040681 https://nantes-universite.hal.science/hal-04040681/document https://nantes-universite.hal.science/hal-04040681/file/bg-15-905-2018.pdf doi:10.5194/bg-15-905-2018 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-15-905-2018 |
container_title |
Biogeosciences |
container_volume |
15 |
container_issue |
3 |
container_start_page |
905 |
op_container_end_page |
918 |
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1785581609866493952 |