Impact of the oyster Crassostrea gigas on a microbial community in Atlantic coastal ponds near La Rochelle
To assess the in situ impact of oysters Crassostrea gigas on planktonic protist and bacteria communities and the potential contribution of protozoa to their food resource intake, the abundance and the diversity of protists and bacteria were followed in 2 Atlantic coastal ponds, with and without oyst...
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Online Access: | https://archimer.ifremer.fr/doc/2000/publication-822.pdf https://doi.org/10.3354/ame022227 https://archimer.ifremer.fr/doc/00000/822/ |
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ftarchimer:oai:archimer.ifremer.fr:822 2023-05-15T15:58:29+02:00 Impact of the oyster Crassostrea gigas on a microbial community in Atlantic coastal ponds near La Rochelle Dupuy, Christine Pastoureaud, Annie Ryckaert, Mireille Sauriau, Pierre-guy Montanie, Hélène 2000-10 application/pdf https://archimer.ifremer.fr/doc/2000/publication-822.pdf https://doi.org/10.3354/ame022227 https://archimer.ifremer.fr/doc/00000/822/ eng eng Inter-Research https://archimer.ifremer.fr/doc/2000/publication-822.pdf doi:10.3354/ame022227 https://archimer.ifremer.fr/doc/00000/822/ 2000 Inter-Research info:eu-repo/semantics/openAccess restricted use Aquatic Microbial Ecology (0948-3055) (Inter-Research), 2000-10 , Vol. 22 , N. 3 , P. 227-242 Trophic link Bacteria Protists Microbial food web Coastal pond Food source Oysters Bivalve text Publication info:eu-repo/semantics/article 2000 ftarchimer https://doi.org/10.3354/ame022227 2021-09-23T20:13:24Z To assess the in situ impact of oysters Crassostrea gigas on planktonic protist and bacteria communities and the potential contribution of protozoa to their food resource intake, the abundance and the diversity of protists and bacteria were followed in 2 Atlantic coastal ponds, with and without oysters. The protist biomass in such ponds was high, with a maximum in spring of 982 mug C l(-1) and a minimum in winter of 179 pg C l(-1). Whatever the season, the presence of oysters (20 m(-2) corresponding to an average of 23 mg dry weight m(-2)) induced a significant decrease in >5 pm protist abundance. On the contrary, planktonic organisms <5 pm, such as Chlorophyta flagellates and bacteria, developed similarly in both ponds. It can be assumed that such depletion in micro-sized protists was especially related to the grazing activity of C. gigas, which efficiently retains >5 pm particles. In spring, oyster grazing triggered dramatic changes in the protist community by lowering the taxonomic diversity. In autumn and winter, the presence of oysters deeply influenced the taxonomic structure of the protist communities: > Fun protists could only develop in the control pond, whereas they were removed by filtration in the oyster pond; on the contrary, >5 Fun protists that were not retained were favoured in the oyster pond. The results showed that hetero/mixotrophic protists represent an important potential resource in coastal ponds: flagellates >5 pm were the main protist resource for C. gigas; ciliates represented the second resource, with a substantial contribution in autumn; diatoms and dinoflagellates, though efficiently removed, represented a weak carbon resource. Our study supports the hypothesis that oysters may access the strong bacterioplanktonic production through hetero/mixotrophic protists, which would thus allow the transfer of carbon from the microbial loop towards C. gigas. Article in Journal/Newspaper Crassostrea gigas Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Aquatic Microbial Ecology 22 227 242 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Trophic link Bacteria Protists Microbial food web Coastal pond Food source Oysters Bivalve |
spellingShingle |
Trophic link Bacteria Protists Microbial food web Coastal pond Food source Oysters Bivalve Dupuy, Christine Pastoureaud, Annie Ryckaert, Mireille Sauriau, Pierre-guy Montanie, Hélène Impact of the oyster Crassostrea gigas on a microbial community in Atlantic coastal ponds near La Rochelle |
topic_facet |
Trophic link Bacteria Protists Microbial food web Coastal pond Food source Oysters Bivalve |
description |
To assess the in situ impact of oysters Crassostrea gigas on planktonic protist and bacteria communities and the potential contribution of protozoa to their food resource intake, the abundance and the diversity of protists and bacteria were followed in 2 Atlantic coastal ponds, with and without oysters. The protist biomass in such ponds was high, with a maximum in spring of 982 mug C l(-1) and a minimum in winter of 179 pg C l(-1). Whatever the season, the presence of oysters (20 m(-2) corresponding to an average of 23 mg dry weight m(-2)) induced a significant decrease in >5 pm protist abundance. On the contrary, planktonic organisms <5 pm, such as Chlorophyta flagellates and bacteria, developed similarly in both ponds. It can be assumed that such depletion in micro-sized protists was especially related to the grazing activity of C. gigas, which efficiently retains >5 pm particles. In spring, oyster grazing triggered dramatic changes in the protist community by lowering the taxonomic diversity. In autumn and winter, the presence of oysters deeply influenced the taxonomic structure of the protist communities: > Fun protists could only develop in the control pond, whereas they were removed by filtration in the oyster pond; on the contrary, >5 Fun protists that were not retained were favoured in the oyster pond. The results showed that hetero/mixotrophic protists represent an important potential resource in coastal ponds: flagellates >5 pm were the main protist resource for C. gigas; ciliates represented the second resource, with a substantial contribution in autumn; diatoms and dinoflagellates, though efficiently removed, represented a weak carbon resource. Our study supports the hypothesis that oysters may access the strong bacterioplanktonic production through hetero/mixotrophic protists, which would thus allow the transfer of carbon from the microbial loop towards C. gigas. |
format |
Article in Journal/Newspaper |
author |
Dupuy, Christine Pastoureaud, Annie Ryckaert, Mireille Sauriau, Pierre-guy Montanie, Hélène |
author_facet |
Dupuy, Christine Pastoureaud, Annie Ryckaert, Mireille Sauriau, Pierre-guy Montanie, Hélène |
author_sort |
Dupuy, Christine |
title |
Impact of the oyster Crassostrea gigas on a microbial community in Atlantic coastal ponds near La Rochelle |
title_short |
Impact of the oyster Crassostrea gigas on a microbial community in Atlantic coastal ponds near La Rochelle |
title_full |
Impact of the oyster Crassostrea gigas on a microbial community in Atlantic coastal ponds near La Rochelle |
title_fullStr |
Impact of the oyster Crassostrea gigas on a microbial community in Atlantic coastal ponds near La Rochelle |
title_full_unstemmed |
Impact of the oyster Crassostrea gigas on a microbial community in Atlantic coastal ponds near La Rochelle |
title_sort |
impact of the oyster crassostrea gigas on a microbial community in atlantic coastal ponds near la rochelle |
publisher |
Inter-Research |
publishDate |
2000 |
url |
https://archimer.ifremer.fr/doc/2000/publication-822.pdf https://doi.org/10.3354/ame022227 https://archimer.ifremer.fr/doc/00000/822/ |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_source |
Aquatic Microbial Ecology (0948-3055) (Inter-Research), 2000-10 , Vol. 22 , N. 3 , P. 227-242 |
op_relation |
https://archimer.ifremer.fr/doc/2000/publication-822.pdf doi:10.3354/ame022227 https://archimer.ifremer.fr/doc/00000/822/ |
op_rights |
2000 Inter-Research info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.3354/ame022227 |
container_title |
Aquatic Microbial Ecology |
container_volume |
22 |
container_start_page |
227 |
op_container_end_page |
242 |
_version_ |
1766394224933076992 |