Estado actual de pastos marinos en dos playas de la cayería norte, Ciego de Ávila, Cuba
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Fecha
2018-06
Autores
Cruz Pérez, Claudia M.
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Editor
Universidad Central "Marta Abreu" de Las Villas. Facultad de Ciencias Agropecuarias. Departamento de Biología
Resumen
Las praderas marinas de sistemas tropicales en ocasiones son afectadas por el paso
de huracanes. En junio de 2017 se monitorearon los pastos marinos en dos playas de
la cayería norte de Ciego de Ávila, playa El Paso y Las Coloradas. En noviembre se
evaluó el estado actual de este ecosistema luego del paso del huracán Irma. Se
ubicaron tres transectos de 50 m paralelos a la costa; en cada transecto se situaron 12
marcos de 25 x 25 cm. La angiosperma marina predominante en las praderas fue la
especie Thalassia testudinum. El desarrollo de pastos mixtos fue observado en playa
El Paso, mientras que el mono-específico en Las Coloradas. Se identificaron 25
especies de macroalgas. Las verdes calcáreas y carnosas fueron las de mayor
cobertura; abundaron las pertenecientes de los géneros Halimeda, Penicillus, Udotea,
y Caulerpa. Se determinaron colonias de corales pétreos pertenecientes a las especies
Manicina areolata, Siderastrea radians y al género Porites. Entre los invertebrados
predominaron las estrellas de la especie Oreaster reticulatus y el molusco Lobatus
gigas. Los peces de mayor abundancia fueron Halichoeres bivittatus y Gerres
cinereus. En noviembre desapareció Syringodium filiforme, disminuyó la diversidad de
invertebrados asociados a los pastos marinos y no se registró ictiofauna. La densidad
de vástagos no mostró diferencias significativas entre sitios por meses, a diferencia de
la altura de la canopia. Los pastos marinos en ambas playas no mostraron signos de
alteraciones significativas ocasionadas por el huracán Irma. Se mostraron como
ecosistemas estables y resilientes.
Sometimes seagrasses the tropical systems are affected by hurricanes. In June 2017 seagrasses were monitored in two sites of the northern keys of Ciego de Ávila, El Paso and Las Coloradas beaches. We evaluated in November, the current status of this ecosystem after the pass of the Irma Hurricane. Three transects of 50 m parallel to the coast were located; in each transect, 12 frames of 25 x 25 cm were placed. The predominant marine angiosperm in the prairies was the species Thalassia testudinum. The development of mixed grasses was observed in El Paso beach, while the mono-specific composition was presents in Las Coloradas. We identified 25 species of macroalgae. The calcareous and fleshy greens were the greater coverage; abounded those belonging to the Halimeda, Penicillus, Udotea, and Caulerpa genera. Were found colonies of stony corals belonging to the species Manicina areolata, Siderastrea radians and the genus Porites. Among the invertebrates the stars of the Oreaster reticulatus and the mollusk Lobatus gigas were predominats. The most abundant fishes species were Halichoeres bivittatus and Guerres cinereus. In November, Syringodium filiforme disappeared, the diversity of invertebrates associated with seagrasses declined and fishes was not recorded. Stem density did not show significant differences between sites per months, unlike the height of the canopy. The seagrasses on both beaches showed no sign of significant alterations caused by Irma Hurricane. They were shown as stable and resilient ecosystems.
Sometimes seagrasses the tropical systems are affected by hurricanes. In June 2017 seagrasses were monitored in two sites of the northern keys of Ciego de Ávila, El Paso and Las Coloradas beaches. We evaluated in November, the current status of this ecosystem after the pass of the Irma Hurricane. Three transects of 50 m parallel to the coast were located; in each transect, 12 frames of 25 x 25 cm were placed. The predominant marine angiosperm in the prairies was the species Thalassia testudinum. The development of mixed grasses was observed in El Paso beach, while the mono-specific composition was presents in Las Coloradas. We identified 25 species of macroalgae. The calcareous and fleshy greens were the greater coverage; abounded those belonging to the Halimeda, Penicillus, Udotea, and Caulerpa genera. Were found colonies of stony corals belonging to the species Manicina areolata, Siderastrea radians and the genus Porites. Among the invertebrates the stars of the Oreaster reticulatus and the mollusk Lobatus gigas were predominats. The most abundant fishes species were Halichoeres bivittatus and Guerres cinereus. In November, Syringodium filiforme disappeared, the diversity of invertebrates associated with seagrasses declined and fishes was not recorded. Stem density did not show significant differences between sites per months, unlike the height of the canopy. The seagrasses on both beaches showed no sign of significant alterations caused by Irma Hurricane. They were shown as stable and resilient ecosystems.
Descripción
Palabras clave
Pastos Marinos, Thalassia Testudinum, Peces, Seagrass Beds