Biotopos marinos intermareales entre Canal Trinidad y Canal Smyth, Sur de Chile
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Fecha
2012
Profesor/a Guía
Facultad/escuela
Idioma
es
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Universidad de Valparaíso. Facultad de Ciencias del Mar
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Licencia CC
Licencia CC
Resumen
Durante un crucero oceanográfico realizado entre el sector sur de la región de Aysén y sector norte de Magallanes, Canal Trinidad a Canal Smyth (50º00'S,75º00'W a 52º00'S, 73º48'W), sur de Chile, se efectuaron 13 estaciones de recolección de material biológico para registrar y caracterizar los biotopos del intermareal rocoso del área. Se identificaron 19 biotopos, 12 de los cuales eran biotopos reconocidos para otras áreas más septentrionales de Aysén; 6 correspondían a variantes de los anteriores y uno sólo fue reconocido y descrito como biotopo nuevo. Entre los primeros están los biotopos de litoral rocoso correspondientes a las especies dominantes Bostrychia harveyi, Acrosiphonia pacifica, Porphyra sp., Adenocystis utricularis, Iridaea tuberculosa y Mazzaella laminarioides-Nothogenia fastigiata. Entre los 6 que representaban variantes de algunos de los biotopos anteriormente descritos hubo 2 de Porphyra sp., 3 de Bostrychia harveyi y 1 de Mazzaella laminarioides-Nothogenia fastigiata. Sólo el biotopo de litoral rocoso integrado por la macroalga Caepidium antarcticum y algas coralináceas crustosas, constituyeron un biotopo nuevo para el área que se distribuye en la subzona eulitoral inferior de frentes protegidos y se caracteriza por presentar una fuerte influencia subantártica. La diversidad de biotopos costeros fue alta, como consecuencia de los múltiples factores geográficos, geológicos, oceanográficos y climáticos que interactúan en esta extensa región. En general, el área se caracterizó por presentar una alta diversidad biológica reflejada en la diversidad de biotopos encontrados, que indicaría la presencia de ecosistemas altamente productivos.
Through an oceanographic cruise carried out between the southern area of Aysén and the northern one of Magallanes, Canal Trinidad to Canal Smyth (50º00'S, 75º00'W to 52º00'S, 73º48'W), 13 collecting stations were made to gather biological material to record and characterizing the intertidal biotopes of this extended area. A total of 19 biotopes were identified, from which 12 of those had been recorded previously at more septentrional areas of Aysén; other 6 represented variations of those previously recorded in other areas and only 1 was described as a new intertidal biotope. Among the former ones are rocky shore biotopes belonging to the dominant species Bostrychia harveyi, Acrosiphonia pacifica, Porphyra sp., Adenocystis utricularis, Iridaea tuberculosa and Mazzaella laminarioides-Nothogenia fastigiata. Among the 6 ones which represent variations of some biotopes before described there are 2 of Porphyra sp., 3 of Bostrychia harveyi and 1 of Mazzaella laminarioides-Nothogenia fastigiata. Just the rocky shore biotope integrated by the macroalgae Caepidium antarcticum and crustose coralline algae was the only new one. This new biotope is distributed in the lower eulitoral subzone of sheltered areas and it is characterized by having a strong subantarctic influence. Coastal biotope biodiversity was high, as a consequence of the multiple geographic, geologic, oceanographic and climatic factors interacting in this extended region. In general, the area was characterized by exhibiting a high biological diversity reflected through the diversity of observed biotopes, which demonstrated the presence of highly productive ecosystem.
Through an oceanographic cruise carried out between the southern area of Aysén and the northern one of Magallanes, Canal Trinidad to Canal Smyth (50º00'S, 75º00'W to 52º00'S, 73º48'W), 13 collecting stations were made to gather biological material to record and characterizing the intertidal biotopes of this extended area. A total of 19 biotopes were identified, from which 12 of those had been recorded previously at more septentrional areas of Aysén; other 6 represented variations of those previously recorded in other areas and only 1 was described as a new intertidal biotope. Among the former ones are rocky shore biotopes belonging to the dominant species Bostrychia harveyi, Acrosiphonia pacifica, Porphyra sp., Adenocystis utricularis, Iridaea tuberculosa and Mazzaella laminarioides-Nothogenia fastigiata. Among the 6 ones which represent variations of some biotopes before described there are 2 of Porphyra sp., 3 of Bostrychia harveyi and 1 of Mazzaella laminarioides-Nothogenia fastigiata. Just the rocky shore biotope integrated by the macroalgae Caepidium antarcticum and crustose coralline algae was the only new one. This new biotope is distributed in the lower eulitoral subzone of sheltered areas and it is characterized by having a strong subantarctic influence. Coastal biotope biodiversity was high, as a consequence of the multiple geographic, geologic, oceanographic and climatic factors interacting in this extended region. In general, the area was characterized by exhibiting a high biological diversity reflected through the diversity of observed biotopes, which demonstrated the presence of highly productive ecosystem.
Notas
Indexación: Web of Science; Scielo
Palabras clave
Macroalgas, Eulitoral, Patagonia, Fiordos, Macroalgae, Eulittoral, Fjords
Citación
Revista de Biología Marina y Oceanografía, Vol. 47, Nº 2, pp. 177-191, 2012.