Spatial and temporal changes in the cetacean community structure at Bahía de La paz, BCS, México (1988-1991)

Spatial and temporal changes in the cetacean community structure at Bahía de La paz, BCS, México (1988-1991)

At two different ecological zones (Canal de San Lorenzo and transitional), located at Bahía de La Paz, we analysed changes in the cetacean community (Shannon and Simpson indexes) in relation to annual and seasonal changes in sea surface temperature, water transparency and inferred and reported food...

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Autores principales: Flores-Ramírez, S, Urban-R, J, Villarreal-Chávez, G, Valle-Jiménez, R
Formato: Online
Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 1996
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/856
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record_format ojs
institution Ciencias Marinas
collection OJS
language eng
format Online
author Flores-Ramírez, S
Urban-R, J
Villarreal-Chávez, G
Valle-Jiménez, R
spellingShingle Flores-Ramírez, S
Urban-R, J
Villarreal-Chávez, G
Valle-Jiménez, R
Spatial and temporal changes in the cetacean community structure at Bahía de La paz, BCS, México (1988-1991)
author_facet Flores-Ramírez, S
Urban-R, J
Villarreal-Chávez, G
Valle-Jiménez, R
author_sort Flores-Ramírez, S
title Spatial and temporal changes in the cetacean community structure at Bahía de La paz, BCS, México (1988-1991)
title_short Spatial and temporal changes in the cetacean community structure at Bahía de La paz, BCS, México (1988-1991)
title_full Spatial and temporal changes in the cetacean community structure at Bahía de La paz, BCS, México (1988-1991)
title_fullStr Spatial and temporal changes in the cetacean community structure at Bahía de La paz, BCS, México (1988-1991)
title_full_unstemmed Spatial and temporal changes in the cetacean community structure at Bahía de La paz, BCS, México (1988-1991)
title_sort spatial and temporal changes in the cetacean community structure at bahía de la paz, bcs, méxico (1988-1991)
description At two different ecological zones (Canal de San Lorenzo and transitional), located at Bahía de La Paz, we analysed changes in the cetacean community (Shannon and Simpson indexes) in relation to annual and seasonal changes in sea surface temperature, water transparency and inferred and reported food availability. Six odontocete and six mysticete species were recorded during the study period. Due to their high relative abundance and persistent presence, the long beak common (Delphinus capensis) and bottlenose (Tursiops truncatus) dolphins, as well as Bryde’s whales (Balaenoptera edeni) were, respectively, the most important odontocete and mysticete community members. The evidente indicates that sea surface temperature and water transparency, besides food availability, show predictable seasonal and annual changes related to the influence of tropical water masses and to large scale oceanographic phenomena, such as El Niño Southern Oscillation and La Niña. Nevertheless, cetacean diversity did not show consequent changes. The cetacean community was more diverse and stable at the transition between seasonal and annual oceanographic conditions. Cetacean diversity changed significantly at smaller time and space scales, defined by the interaction of particular annual, seasonal and local conditions. This and changes in species richness, mediated by the temporal residence of migrating species of temperate waters or more sporadic tropical visitors, indicate the existence of fast and important changes in species abundance and substitution rates, associated with the behavioural ecology of the species and fluctuations in the ecosystem’s metabolism.
publisher Iniversidad Autónoma de Baja California
publishDate 1996
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/856
_version_ 1715724019791036416
spelling oai:cienciasmarinas.com.mx:article-8562019-06-05T00:33:38Z Spatial and temporal changes in the cetacean community structure at Bahía de La paz, BCS, México (1988-1991) Cambios espaciales y temporales de la estructura comunitaria de los cetáceos en Bahía de La Paz, BCS, México (1988-1991) Flores-Ramírez, S Urban-R, J Villarreal-Chávez, G Valle-Jiménez, R cetaceans ecology community diversity Gulf of California cetáceos ecología comunidad diversidad Golfo de California At two different ecological zones (Canal de San Lorenzo and transitional), located at Bahía de La Paz, we analysed changes in the cetacean community (Shannon and Simpson indexes) in relation to annual and seasonal changes in sea surface temperature, water transparency and inferred and reported food availability. Six odontocete and six mysticete species were recorded during the study period. Due to their high relative abundance and persistent presence, the long beak common (Delphinus capensis) and bottlenose (Tursiops truncatus) dolphins, as well as Bryde’s whales (Balaenoptera edeni) were, respectively, the most important odontocete and mysticete community members. The evidente indicates that sea surface temperature and water transparency, besides food availability, show predictable seasonal and annual changes related to the influence of tropical water masses and to large scale oceanographic phenomena, such as El Niño Southern Oscillation and La Niña. Nevertheless, cetacean diversity did not show consequent changes. The cetacean community was more diverse and stable at the transition between seasonal and annual oceanographic conditions. Cetacean diversity changed significantly at smaller time and space scales, defined by the interaction of particular annual, seasonal and local conditions. This and changes in species richness, mediated by the temporal residence of migrating species of temperate waters or more sporadic tropical visitors, indicate the existence of fast and important changes in species abundance and substitution rates, associated with the behavioural ecology of the species and fluctuations in the ecosystem’s metabolism. En dos zonas ecológicas de la Bahía de La Paz (Canal de San Lorenzo y transicional) se analizó el cambio espacial y temporal de la diversidad de cetáceos (índices de Shannon y Simpson) en relación con el cambio anual y estacional de la temperatura, transparencia del agua, e inferencias y reportes sobre la disponibilidad de alimento. En el estudio, se registraron seis especies de odontocetos y seis de misticetos. Por su mayor abundancia relativa y presencia continua, el delfín común de rostro largo (Delphinus capensis) y el tursión (Tursiops truncatus), así como el rorcual tropical (Balaenoptera edeni) fueron, respectivamente, los odontocetos y el misticeto más importantes de la comunidad de cetáceos. La evidencia indica que, en la bahía, la temperatura y transparencia del agua, al igual que la disponibilidad de alimento cambian estacionalmente y anualmente de manera predecible, en relación con el ingreso y salida de masas de agua tropical y la influencia de fenómenos oceanográficos, como El Niño Oscilación Austral y La Niña. Sin embargo, la diversidad de cetáceos no cambió de manera correspondiente. Así, la comunidad de cetaceos fue más diversa y hasta cierto punto estable durante la transición entre condiciones oceanográficas estacionales y anuales. En general, cambió significativamente a menores escalas espaciales y temporales definidas por la interacción de condiciones ambientales de años, estaciones y zonas particulares. Lo anterior y el cambio correspondiente en la riqueza específica, mediado por el ingreso de especies migratorias de afinidad templada y visitantes de afinidad tropical, indican que en el área la tasa de cambio de la abundancia y sustitución de especies es intensa, asociada con la conducta ecológica de las especies y los cambios metabólicos del sistema. Iniversidad Autónoma de Baja California 1996-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/856 10.7773/cm.v22i2.856 Ciencias Marinas; Vol. 22 No. 2 (1996); 151-173 Ciencias Marinas; Vol. 22 Núm. 2 (1996); 151-173 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/856/778

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