Document of bibliographic reference 56320
BibliographicReference record
- Type
- Bibliographic resource
- Type of document
- Journal article
- BibLvlCode
- AS
- Title
- Response of coastal phytoplankton to ammonium and nitrate pulses: seasonal variations of nitrogen uptake and regeneration
- Abstract
- Seasonal variation in uptake and regeneration of ammonium and nitrate in a coastal lagoon was studied using 15N incorporation in particulate matter and by measuring changes in particulate nitrogen. Uptake and regeneration rates were two orders of magnitude lower in winter than in summer. Summer uptake values were 2.8 and 2.2 μmol N.l-1.d-1 for ammonium and nitrate, respectively. Regeneration rates were 2.9 and 2.1 μmol N.lsup>-1.d-1 for ammonium and nitrate respectively. Regeneration/uptake ratios were often below one, indicating that water column processes were not sufficient to satisfy the phytoplankton nitrogen demand. This implies a role of other sources of nitrogen, such as macrofauna (oysters and epibionts) and sediment. Phytoplankton was well adapted to the seasonal variations in resources, with mixotrophic dinoflagellates dominant in winter, and fast growing diatoms in summer. In winter and spring, ammonium was clearly preferred to nitrate as a nitrogen source, but nitrate was an important nitrogen source in summer because of high nitrification rates. Despite low nutrient levels, the high rates of nitrogen regeneration in summer as well as the simultaneous uptake of nitrate and ammonium allow high phytoplankton growth rates which in turn enable high oyster production.
- WebOfScience code
- https://www.webofscience.com/wos/woscc/full-record/WOS:000185513900002
- Bibliographic citation
- Collos, Y.; Vaquer, A.; Bibent, B.; Souchu, P.; Slawyk, G.; Garcia, N. (2003). Response of coastal phytoplankton to ammonium and nitrate pulses: seasonal variations of nitrogen uptake and regeneration. Aquat. Ecol. 37(3): 227-236. http://dx.doi.org/10.1023/a:1025881323812
- location created
- Laboratoire d'Hydrobiologie (UMR CNRS 5119)
- Topic
- Marine
- Is peer reviewed
- true
- Access rights
- open access
- Is accessible for free
- true
Authors
- author
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- author
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- author
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- author
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- author
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- Name
- Gerd Slawyk
- author
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thesaurus terms
- term
- Ammonium compounds (term code: 320 - defined in term set: ASFA Thesaurus List)
- Coastal lagoons (term code: 1642 - defined in term set: ASFA Thesaurus List)
- MED, France, Languedoc-Roussillon, Thau Lagoon (term code: 185868 - defined in term set: ASFA Geoterms)
- Nitrates (term code: 5561 - defined in term set: ASFA Thesaurus List)
- Nitrification (term code: 5563 - defined in term set: ASFA Thesaurus List)
- Particulate organic matter (term code: 6030 - defined in term set: ASFA Thesaurus List)
- Particulate organic nitrogen (term code: 6031 - defined in term set: ASFA Thesaurus List)
- Phytoplankton (term code: 6208 - defined in term set: ASFA Thesaurus List)
- Regeneration (term code: 6840 - defined in term set: ASFA Thesaurus List)
- Seasonal variations (term code: 7329 - defined in term set: ASFA Thesaurus List)
- Uptake (term code: 9627 - defined in term set: ASFA Thesaurus List)
geographic terms
- geographic terms associated with this publication
- Thau Lagoon