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| Format: | Artículo científico |
| Language: | en |
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Universidad de Costa Rica
2007
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| Online Access: | https://www.redalyc.org/articulo.oa?id=44955214 |
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Table of Contents:
- Spatio-temporal variation of the structural organization of demersal communities in the Southwestern Gulf of Mexico Daniel Torruco Alicia González Ernesto A. Chávez Biología fish Veracruz diversity Gulf of Mexico trophic spectrum Structural patterns of a sublittoral community were analyzed through a two-year series of samples inthe Southwestern Gulf of Mexico. The groups involved in the study comprise fishes, molluscs, echinoderms andcrustaceans. The time-space progressions of Second 0rder diversity values range between N2=5.3 and N2=9.8at 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 analysisshow five assemblages: benthic, benthic-demersal, demersal, mid water column, and temporary. There is astriking difference in trophic web structure between the dry season and rainy season. Fish community resourcepartitioning shows that the components are organized in three guilds: ichthyophagous, carcinophagous andomnivorous. However, a partial overlap of niches was commonly observed, and juvenile stages showed a narrowertrophic spectrum than adults. Rev. Biol. Trop. 55 (2): 509-536. Epub 2007 June, 29. 2007 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44955214 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.2 Vol.55