Seasonal and Spatial Controls on the Delivery of Excess Nutrients to Nearshore and Offshore Coral Coral Reefs of Brazil

Seasonal and spatial controls on the delivery of excess nutrients to nearshore and offshore coral reefs of Brazil were evaluated. Seawater and porewater were sampled during dry and rainy seasons in three nearshore and offshore reefs with distinct nutrient inputs along the south coast of Bahia State,...

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Bibliographic Details
Published in:Journal of marine systems 2006-04, Vol.60 (1), p.63-63
Main Authors: Costa, Ozeas S, Attrill, Martin J, Nimmo, Malcolm
Format: Article
Language:English
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Summary:Seasonal and spatial controls on the delivery of excess nutrients to nearshore and offshore coral reefs of Brazil were evaluated. Seawater and porewater were sampled during dry and rainy seasons in three nearshore and offshore reefs with distinct nutrient inputs along the south coast of Bahia State, and analyzed for total oxidized nitrogen (TON), soluble reactive phosphorus (SRP), reactive silica (DSi), and chlorophyll a (Chl a). Rainfall promoted significant increase in the load of nutrients to nearshore and offshore reefs. Differences in nutrient concentration between nearshore and offshore reefs were more pronounced during dry season, when the bulk of land-based nutrient contribution was confined to nearshore reefs. SRP values at the study sites were significantly higher than other coral reef areas, suggesting the occurrence of a permanent source of phosphorus along this highly erogenous coast.
ISSN:0924-7963