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Efecto de la canopia de macroalgas frondosas sobre algas coralinas costrosas y reclutas-juveniles de coral en un arrecife al norte de La Habana.
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Date
2020
Metadata
Show full item recordAlternative Title
Effect of macroalgae canopy over crustose coralline algae and coral recruits- juveniles in a coral reef off Havana.Abstract
Las macroalgas tienen la habilidad de modificar a las comunidades del bentos, al facilitar o excluir especies que interactúan con su canopia. Los objetivos del estudio fueron: (1) analizar la diversidad, dinámica temporal e interacciones entre macroalgas frondosas, algas coralinas costrosas (ACC) y reclutas/juveniles de coral; y (2) probar el efecto protector de la canopia de macroalgas a partir de un experimento de campo en el veril superior. Las especies dominantes de macroalgas fueron Lobophora cf. variegata y Sargassum sp. Se registraron siete especies de ACC: Porolithon onkodes, Hydrolithon sp., Lithothamnion sp., Neogoniolithon sp. 1, Neogoniolothon sp. 2, Neogoniolithon sp. 3 y Neogoniolithon sp. 4. Los corales jóvenes que dominaron fueron Siderastrea siderea, Porites astreoides y P. porites. La cobertura de macroalgas frondosas y la densidad de reclutas-juveniles de coral variaron entre meses, pero no así la cobertura de ACC. El experimento apoyó la hipótesis del efecto facilitador de la canopia sobre las ACC. Existió evidencia de un efecto inhibidor de las macroalgas frondosas sobre los reclutas/juveniles de coral ya que estos últimos aumentaron su densidad ante la ausencia sostenida de la canopia. Sin embargo, en septiembre disminuyó la densidad de reclutas y juveniles de coral lo que se puede atribuir al impacto del huracán Irma en las cercanías del sitio de estudio. De este modo, en determinados escenarios las macroalgas frondosas pueden presentar un efecto protector a los corales jóvenes.Macroalgae can modify to benthic communities enhancing or excluding the species that interact with their canopy. The objectives of this study were: (1) to analyze the diversity, tempo- ral dynamics, and interaction between leafy macroalgae, coralline crustose algae (CCA), and coral recruits/juveniles; and (2) to test the protective effect of macroalgae canopy based on a field experiment in the reef terrace. The dominant species of macroalgae were Lobophora cf. variegata and Sargassum sp. Seven CCA species were recorded: Porolithon onkodes, Hydrolithon sp., Lithothamnion sp., Neogoniolithon sp. 1, Neogoniolothon sp. 2, Neogoniolithon sp. 3 and Neogoniolithon sp. 4. The dominant species of juvenile corals were Siderastrea siderea, Porites astreoides and P. porites. Leafy macroalgae cover and density of coral recruits/juveniles varied among months, but not the CCA cover. The experiment supported the hypothesis of enhancing effect of the canopy on the ACC. There was evidence of inhibiting effect of macroalgae on coral recruits/juveniles because latter increased their density after the continued absence of the canopy. On September, the density of coral recruits/juveniles decreased maybe because the impact of Irma hurricane on the proximity of the study site. That how in some cases, leafy macroalgae could have a protective effect on young corals under certain scenarios.
Journal
Revista de Investigaciones MarinasVolume
39Issue/Article Nr
2Page Range
pp.1-22Collections