期刊
ESTUARIES AND COASTS
卷 32, 期 6, 页码 1176-1194出版社
SPRINGER
DOI: 10.1007/s12237-009-9218-0
关键词
Aureococcus anophagefferens; Brown tide; Nutrients; Dissolved organic matter
资金
- US ECOHAB Program
- National Oceanographic and Atmospheric Administration
- Environmental Protection Agency
- National Science Foundation
- National Aeronautics and Space Administration
- Office of Naval Research
To determine the roles of dissolved organic matter in the onset, duration, and decline of blooms of the brown tide pelagophyte, Aureococcus anophagefferens, nutrient and microbial dynamics, heterotrophic and autotrophic carbon (C) and nitrogen (N) uptake, and peptide hydrolysis were compared in natural populations: (1) seasonally, among physically similar sites in a mid-Atlantic coastal lagoon, Chincoteague Bay, (2) at an individual site as a bloom initiated, developed, and declined, and (3) in whole versus size-fractionated water. Throughout the year, urea was the dominant form of N taken up at both bloom and nonbloom sites. C acquisition in the A. anophagefferens (1.2-5.0 mu m) size fraction was dominated by bicarbonate uptake during bloom initiation but organic C compounds were taken up later during and after the bloom. Bacterial productivity was enhanced during and just after the bloom and bacterial abundance was four times higher at the bloom versus nonbloom site.
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