TY - JOUR
T1 - Spatio-temporal variation of the structural organization of demersal communities in the Southwestern Gulf of Mexico
AU - Torruco, Daniel
AU - Chávez, Ernesto A.
AU - González, Alicia
PY - 2007/6
Y1 - 2007/6
N2 - 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 Order 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 (N 2=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.
AB - 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 Order 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 (N 2=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.
KW - Community composition
KW - Diversity
KW - Fish
KW - Gulf of Mexico
KW - Marine invertebrates
KW - Trophic spectrum
KW - Veracruz
UR - http://www.scopus.com/inward/record.url?scp=47749141128&partnerID=8YFLogxK
U2 - 10.15517/rbt.v55i2.6028
DO - 10.15517/rbt.v55i2.6028
M3 - Artículo
SN - 0034-7744
VL - 55
SP - 509
EP - 536
JO - Revista de Biologia Tropical
JF - Revista de Biologia Tropical
IS - 2
ER -