Oxygen Extraction Efficiency and Tolerance to Hypoxia in Sponges
Sponges have always been filter feeders, in contrast to all the other filter-feeding invertebrate groups for which this feeding mode is a secondary adaptation. This study calls attention to this aspect, which explains why sponges are tolerant to hypoxia, but probably not more tolerant than the other...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-01-01
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| Series: | Journal of Marine Science and Engineering |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-1312/12/1/138 |
| _version_ | 1797343242690232320 |
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| author | Hans Ulrik Riisgård |
| author_facet | Hans Ulrik Riisgård |
| author_sort | Hans Ulrik Riisgård |
| collection | DOAJ |
| description | Sponges have always been filter feeders, in contrast to all the other filter-feeding invertebrate groups for which this feeding mode is a secondary adaptation. This study calls attention to this aspect, which explains why sponges are tolerant to hypoxia, but probably not more tolerant than the other filter-feeding invertebrates. The measurement of respiration rates at decreasing oxygen concentrations along with an estimation of the oxygen extraction efficiency in the marine demosponge <i>Halichondria panicea</i> have been used to understand why sponges are tolerant to low oxygen concentrations. It was found that the respiration rate was constant down to about 1.5 mL O<sub>2</sub> L<sup>−1</sup>, which shows that the extraction efficiency increases with a decreasing oxygen concentration. It is argued that the relationship between the filtration rate and oxygen consumption in filter feeders is controlled by the resistance to the diffusion of oxygen across the boundary layer between the feeding current and the tissues of the body. A high tolerance to hypoxia is a consequence of the adaptation to filter feeding, and sponges do not have a special capacity to overcome hypoxic events. |
| first_indexed | 2024-03-08T10:44:56Z |
| format | Article |
| id | doaj.art-09bd3677ed0a44bd9d6eecac864ae0f3 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-08T10:44:56Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-09bd3677ed0a44bd9d6eecac864ae0f32024-01-26T17:17:01ZengMDPI AGJournal of Marine Science and Engineering2077-13122024-01-0112113810.3390/jmse12010138Oxygen Extraction Efficiency and Tolerance to Hypoxia in SpongesHans Ulrik Riisgård0Marine Biological Research Centre, Department of Biology, University of Southern Denmark, 5300 Kerteminde, DenmarkSponges have always been filter feeders, in contrast to all the other filter-feeding invertebrate groups for which this feeding mode is a secondary adaptation. This study calls attention to this aspect, which explains why sponges are tolerant to hypoxia, but probably not more tolerant than the other filter-feeding invertebrates. The measurement of respiration rates at decreasing oxygen concentrations along with an estimation of the oxygen extraction efficiency in the marine demosponge <i>Halichondria panicea</i> have been used to understand why sponges are tolerant to low oxygen concentrations. It was found that the respiration rate was constant down to about 1.5 mL O<sub>2</sub> L<sup>−1</sup>, which shows that the extraction efficiency increases with a decreasing oxygen concentration. It is argued that the relationship between the filtration rate and oxygen consumption in filter feeders is controlled by the resistance to the diffusion of oxygen across the boundary layer between the feeding current and the tissues of the body. A high tolerance to hypoxia is a consequence of the adaptation to filter feeding, and sponges do not have a special capacity to overcome hypoxic events.https://www.mdpi.com/2077-1312/12/1/138<i>Halichondria panicea</i>filter feedingrespiration ratefiltration rateadaptation<i>F</i>/<i>R</i> ratio |
| spellingShingle | Hans Ulrik Riisgård Oxygen Extraction Efficiency and Tolerance to Hypoxia in Sponges Journal of Marine Science and Engineering <i>Halichondria panicea</i> filter feeding respiration rate filtration rate adaptation <i>F</i>/<i>R</i> ratio |
| title | Oxygen Extraction Efficiency and Tolerance to Hypoxia in Sponges |
| title_full | Oxygen Extraction Efficiency and Tolerance to Hypoxia in Sponges |
| title_fullStr | Oxygen Extraction Efficiency and Tolerance to Hypoxia in Sponges |
| title_full_unstemmed | Oxygen Extraction Efficiency and Tolerance to Hypoxia in Sponges |
| title_short | Oxygen Extraction Efficiency and Tolerance to Hypoxia in Sponges |
| title_sort | oxygen extraction efficiency and tolerance to hypoxia in sponges |
| topic | <i>Halichondria panicea</i> filter feeding respiration rate filtration rate adaptation <i>F</i>/<i>R</i> ratio |
| url | https://www.mdpi.com/2077-1312/12/1/138 |
| work_keys_str_mv | AT hansulrikriisgard oxygenextractionefficiencyandtolerancetohypoxiainsponges |