Data/hora: 08/06/2024 16:57:36

Provedor de dados: | 20
País: | Belgium
Título: | Diversidad y distribución de la macro- y meiofauna (especialmente nemátodos) en el ecosistema arrecifal de Punta Francés, Cuba
Autores: | Ruiz Abierno, A.
Data: | 2014-06-06
Ano: | 2013
Palavras-chave: | Microfauna; Meiofauna; Coral reefs; Ecosystems.
Resumo: | Se estudió la diversidad y distribución de la macro-  y meiofauna  y los rasgos  funcionales de nemátodos marinos en dos sitios y cuatro hábitats dentro del ecosistema  arrecifal de Punta Francés, Isla de La Juventud, Cuba. Los hábitats seleccionados  fueron: seibadal,  arena, coral muerto y fondo duro, y se muestrearon en dos sitios  dentro del arrecife (Punta Francés y Cabezo de Moya) en Junio del 2010. Se  identificaron y contaron los organismos de la macro- y meiofauna en las muestras; los  nemátodos fueron identificados hasta especie, se calculó su tamaño y biomasa y se  clasificaron en grupos tróficos.  Los hábitats de coral muerto y fondo duro por su  heterogeneidad y cubierta de césped de algas  tuvieron  macro-  y meiofauna más  diversa. La meiofauna mostró mayor diversidad filética que la macrofauna  indicando  que es posiblemente el dominio de la biota más diverso en el arrecife. Las nemátodos  fueron más abundantes en los fondos blandos posiblemente porque  es el  grupo  que  mejor explota el ambiente intersticial. El modo de vida epibéntico en los fondos duros  implica mayor exposición a la hidrodinámica y muchas especies de nemátodos en estos  hábitats  tuvieron  adaptaciones morfológicas para evitar la resuspensión.  La riqueza  observada de nemátodos fue de 156 ± 9 especies; ello indicó una elevada biodiversidad  del grupo en el arrecife coralino. La talla y biomasa de los nemátodos dependió del tipo  de hábitat,  particularmente de la calidad del alimento. Los nemátodos más grandes estuvieron mejor adaptados a digerir el detrito que se acumula en el seibadal mientras  que los nemátodos  pequeños  aparecieron  en la  arena  posiblemente por estar  restringidos a alimentarse del biofilm que ocurre sobre los granos de sedimento.  Los  nemátodos raspadores de epistrato  fueron  los más abundantes en  el arrecife. En el  hábitat de arena aumentó  la proporción de depredadores, posiblemente debido a su  homogeneidad espacial y al pequeño tamaño de otros nemátodos. También en este  hábitat, la proporción de detritívoros disminuyó  porque no están adaptados  eficientemente a consumir el biofilm que es la principal fuente de materia orgánica.
Tipo: | Theses and Dissertations
Idioma: | Espanhol
Identificador: | http://hdl.handle.net/1834/5484
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