Spatio-temporal variation of the structural organization of demersal communities in the Southwestern Gulf of Mexico
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| Autores: | , , |
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| Formato: | artículo original |
| Estado: | Versión publicada |
| Fecha de Publicación: | 2007 |
| Descripción: | Structural patterns of a sublittoral community were analyzed through a two year series of samples in the Southwestern Gulf of Mexico. The groups involved in the study comprise fishes, molluscs, echinoderms and crustaceans. The time-space progressions of Second 0rder diversity values range between N2=5.3 and N2=9.8 at depths of 40 and 20 m respectively, through the first year of samples. In the second year the highest value (N2=22.2) was found at 30 m. The community ordination data through cluster and principal components analysis show five assemblages: benthic, benthic-demersal, demersal, mid water column, and temporary. There is a striking difference in trophic web structure between the dry season and rainy season. Fish community resource partitioning shows that the components are organized in three guilds: ichthyophagous, carcinophagous and omnivorous. However, a partial overlap of niches was commonly observed, and juvenile stages showed a narrower trophic spectrum than adults. |
| País: | Portal de Revistas UCR |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:portal.ucr.ac.cr:article/6028 |
| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/6028 |
| Palabra clave: | Invertebrados marinos peces composición de comunidad diversidad espectro trófico Golfo de México Veracruz. Marine invertebrates fish community composition diversity trophic spectrum Gulf of Mexico |