In situ feeding and metabolism of glass sponges (Hexactinellida, Porifera) studied in a deep temperate fjord with a remotely operated submersible
Glass sponges are conspicuous inhabitants of benthic communities in the cool waters of the Antarctic and north Pacific continental shelf. We used an ROV outfitted with a new device for simultaneous sampling of water inhaled and exhaled by the sponges to provide the first data on the nutritional ecol...
Published in: | Limnology and Oceanography |
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crwiley:10.4319/lo.2007.52.1.0428 2024-06-09T07:39:44+00:00 In situ feeding and metabolism of glass sponges (Hexactinellida, Porifera) studied in a deep temperate fjord with a remotely operated submersible Yahel, Gitai Whitney, Frank Reiswig, Henry M. Eerkes-Medrano, Dafne I. Leys, Sally P. 2007 http://dx.doi.org/10.4319/lo.2007.52.1.0428 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2007.52.1.0428 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2007.52.1.0428 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 52, issue 1, page 428-440 ISSN 0024-3590 1939-5590 journal-article 2007 crwiley https://doi.org/10.4319/lo.2007.52.1.0428 2024-05-16T14:28:41Z Glass sponges are conspicuous inhabitants of benthic communities in the cool waters of the Antarctic and north Pacific continental shelf. We used an ROV outfitted with a new device for simultaneous sampling of water inhaled and exhaled by the sponges to provide the first data on the nutritional ecology and metabolism of two glass sponge species in their natural deep‐water habitat (120–160 m). Aphrocallistes vastus and Rhabdocalyptus dawsoni were found to be mostly bacteriovores, removing up to 95% of the bacteria (median removal was 79% for both species) and heterotrophic protists (<10 µm) from the water they filter. The relatively scarce microbial cells were efficiently selected from a ‘soup’ of suspended clay and detritus particles (microorganisms accounted for ~1% of the total ambient suspended solids). Removal of planktonic microorganisms (2.2 ± 1.3 µmol carbon [C] C L −1 and 0.37 ± 0.17 µmol nitrogen [N] L −1 ) accounted for the entire total organic C uptake and ammonium excretion by both species, with no evidence for dissolved organic uptake. Similar results were obtained in laboratory experiments in which dissolved organic C was directly measured. Despite the massive siliceous sponge skeleton, silica uptake was below detection levels (0.28 µmol L −1 ), supporting previous suggestions of low growth rates in Hexactinellida. Reported mean sponge abundances of >1 individual m −2 indicate that the sponge filtering activity may significantly affect the deep microbial community and benthic‐pelagic mass exchange in some north‐east Pacific fjords. Article in Journal/Newspaper Antarc* Antarctic Glass sponges Wiley Online Library Antarctic The Antarctic Pacific Limnology and Oceanography 52 1 428 440 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Glass sponges are conspicuous inhabitants of benthic communities in the cool waters of the Antarctic and north Pacific continental shelf. We used an ROV outfitted with a new device for simultaneous sampling of water inhaled and exhaled by the sponges to provide the first data on the nutritional ecology and metabolism of two glass sponge species in their natural deep‐water habitat (120–160 m). Aphrocallistes vastus and Rhabdocalyptus dawsoni were found to be mostly bacteriovores, removing up to 95% of the bacteria (median removal was 79% for both species) and heterotrophic protists (<10 µm) from the water they filter. The relatively scarce microbial cells were efficiently selected from a ‘soup’ of suspended clay and detritus particles (microorganisms accounted for ~1% of the total ambient suspended solids). Removal of planktonic microorganisms (2.2 ± 1.3 µmol carbon [C] C L −1 and 0.37 ± 0.17 µmol nitrogen [N] L −1 ) accounted for the entire total organic C uptake and ammonium excretion by both species, with no evidence for dissolved organic uptake. Similar results were obtained in laboratory experiments in which dissolved organic C was directly measured. Despite the massive siliceous sponge skeleton, silica uptake was below detection levels (0.28 µmol L −1 ), supporting previous suggestions of low growth rates in Hexactinellida. Reported mean sponge abundances of >1 individual m −2 indicate that the sponge filtering activity may significantly affect the deep microbial community and benthic‐pelagic mass exchange in some north‐east Pacific fjords. |
format |
Article in Journal/Newspaper |
author |
Yahel, Gitai Whitney, Frank Reiswig, Henry M. Eerkes-Medrano, Dafne I. Leys, Sally P. |
spellingShingle |
Yahel, Gitai Whitney, Frank Reiswig, Henry M. Eerkes-Medrano, Dafne I. Leys, Sally P. In situ feeding and metabolism of glass sponges (Hexactinellida, Porifera) studied in a deep temperate fjord with a remotely operated submersible |
author_facet |
Yahel, Gitai Whitney, Frank Reiswig, Henry M. Eerkes-Medrano, Dafne I. Leys, Sally P. |
author_sort |
Yahel, Gitai |
title |
In situ feeding and metabolism of glass sponges (Hexactinellida, Porifera) studied in a deep temperate fjord with a remotely operated submersible |
title_short |
In situ feeding and metabolism of glass sponges (Hexactinellida, Porifera) studied in a deep temperate fjord with a remotely operated submersible |
title_full |
In situ feeding and metabolism of glass sponges (Hexactinellida, Porifera) studied in a deep temperate fjord with a remotely operated submersible |
title_fullStr |
In situ feeding and metabolism of glass sponges (Hexactinellida, Porifera) studied in a deep temperate fjord with a remotely operated submersible |
title_full_unstemmed |
In situ feeding and metabolism of glass sponges (Hexactinellida, Porifera) studied in a deep temperate fjord with a remotely operated submersible |
title_sort |
in situ feeding and metabolism of glass sponges (hexactinellida, porifera) studied in a deep temperate fjord with a remotely operated submersible |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.4319/lo.2007.52.1.0428 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2007.52.1.0428 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2007.52.1.0428 |
geographic |
Antarctic The Antarctic Pacific |
geographic_facet |
Antarctic The Antarctic Pacific |
genre |
Antarc* Antarctic Glass sponges |
genre_facet |
Antarc* Antarctic Glass sponges |
op_source |
Limnology and Oceanography volume 52, issue 1, page 428-440 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.2007.52.1.0428 |
container_title |
Limnology and Oceanography |
container_volume |
52 |
container_issue |
1 |
container_start_page |
428 |
op_container_end_page |
440 |
_version_ |
1801381486265368576 |