期刊
LIMNOLOGY AND OCEANOGRAPHY LETTERS
卷 3, 期 4, 页码 331-340出版社
WILEY
DOI: 10.1002/lol2.10074
关键词
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资金
- National Fish and Wildlife Foundation [44447]
- US National Science Foundation [OCE-1538567, OCE-1538393, OCE-1538428, OCE-PRF 1323822]
- University of Hawai'i at Manoa Undergraduate Research Opportunities Program
- National Oceanic and Atmospheric Administration
- Project R/WR-3 - University of Hawai'i Sea Grant College Program, SOEST under NOAA Office of Sea Grant, Department of Commerce [NA14OAR4170071]
- Sea Grant College Program of the University of Hawai'i at Manoa [UNIHI-SEAGRANT-JC-16-16]
- School of Ocean and Earth Science and Technology [10329]
- Directorate For Geosciences [1538428] Funding Source: National Science Foundation
- Division Of Ocean Sciences [1538428] Funding Source: National Science Foundation
Dissolved organic matter (DOM) composition influences microbial community metabolism and benthic primary producers are a source of DOM in coral reefs. As reef benthic communities change, in part due to nutrient pollution, understanding impacts on reef microbial processes requires knowledge of DOM sources and composition. We conducted a multi-week mesocosm experiment dosing four coral reef benthic constituents with three levels of nitrate and phosphate to contrast exudate composition and quantify the effects of nutrient enrichment on exudate release. Moderate nutrient enrichment enhanced bulk dissolved organic carbon exudation by all producers. Corals exuded rapidly accumulating DOM with a markedly high concentration of aromatic amino acid-like fluorescent DOM components that clearly distinguishes them from algal exudates, which were dominated by humic-like fluorescent components and did not accumulate significantly. Our results indicate that corals and algae release DOM of different quality and the quantity of DOM release increases with inorganic nutrient availability.
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