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Índice de Puerto Rico
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Índice de Puerto Rico

Información del Artículo

Effect of terrigenous sediment influx on coral cover and linear extension rates of three caribbean massive coral species
En: CARIBBEAN JOURNAL OF SCIENCE, 38 (3-4) Dec. 2002: 222-229. bibl. gráf. tablas.
Revista: Caribbean journal of science, vol. 38, núm. 3-4; Dec. 2002
Resumen: During the past three decades, high sediment input from urbanization and river discharges have changed the structure of many Puerto Rico coral reefs from primary reef-builders to scattered colonies of secondary species and hardground-type areas. We measured the coral cover and the linear extension rates of the Caribbean corals Montastraea annularis, Sinderastrea siderea, and Porites astreoides at five sites in Puerto Rico. Sediment deposition rates varied from very low to high. Although the cover of M. annularis decreased significantly in reefs with a high content of terrigenous sediments, the cover of S. siderea and P. astreoides was not affected. The linear extension rates of the three species were not significantly affected. Differences in linear extension of both density bands appear to be related to sediment regime, but it is not such a controlling factor that we can disregard other metabolic processes. The input of a large amount of terrigenous sediments into a reef environment resulted in the loss of sediment-sensitive species (e.g., M. annularis), but did not markedly affect sediment-tolerant species (e.g., siderea and P. asteroides).
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