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Dynamics of community structure and phosphate status of picocyanobacterial populations in the Gulf of Aqaba, Red Sea
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UNSPECIFIED (2005) Dynamics of community structure and phosphate status of picocyanobacterial populations in the Gulf of Aqaba, Red Sea. LIMNOLOGY AND OCEANOGRAPHY, 50 (1). pp. 363-375. ISSN 0024-3590.
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Abstract
We monitored the genetic diversity and phosphate (P) status of Prochlorococcus and Synechococcus populations during an annual cycle (1999-2000) in the Gulf of Aqaba, Red Sea, using DNA probes and antibodies against the protein PstS, a molecular marker of P stress. The usual spring Synechococcus bloom was not observed in this year, and the picophytoplankton was dominated by Prochlorococcus from April to December. A single high light (HL)-adapted ecotype of Prochlorococcus, HLII, dominated, and this dominance extended even to the base of the euphotic zone for much of the year. Low light (LL)-adapted ecotypes only appeared between July and October and were confined to waters deeper than 50 m. The Synechococcus population was also dominated by a single clade (clade 11), with the exception of a peak of clade III genotypes in June. Highest PstS expression from the collective Synechococcus and Prochlorococcus populations, indicative of P stress, was observed during the acutely oligotrophic summer, whereas low expression occurred during the winter and spring. Prochlorococcus abundance appeared unaffected by P stress and only decreased with the beginning of winter mixing, whereas P stress might have caused the decline of the Synechococcus population in May 1999.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QH Natural history G Geography. Anthropology. Recreation > GC Oceanography |
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| Journal or Publication Title: | LIMNOLOGY AND OCEANOGRAPHY | ||||
| Publisher: | AMER SOC LIMNOLOGY OCEANOGRAPHY | ||||
| ISSN: | 0024-3590 | ||||
| Official Date: | January 2005 | ||||
| Dates: |
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| Volume: | 50 | ||||
| Number: | 1 | ||||
| Number of Pages: | 13 | ||||
| Page Range: | pp. 363-375 | ||||
| Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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