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• W2394914511 abstract "espanolLa parte norte de la Isla Grande de Chiloe (41,8°S) ha sido vinculada a un quiebre biogeografico abrupto en el Pacifico Sudeste, lo que marca el limite norte de la Provincia Magallanica, una gran zona geografica caracterizada por tener una costa desmembrada en oposicion a la fisonomia de la costa Chilena ubicada mas al norte. Este estudio presenta una primera caracterizacion ecologica y biogeografica de la macrobiota intermareal rocosa de la zona noroeste de la Isla Grande de Chiloe, una linea costera de aproximadamente 50 km. En 5 sitios se aplico un muestreo sistematico (transectos perpendiculares a la costa usando cuadrantes de 0,25 m² en 4 niveles mareales), analizando los datos mediante metodos multivariados. Se registro un total de 38 especies cuya zonacion y dominancia fueron consistentes entre sitios, aunque con diferencias menores debidas a variaciones locales en abundancia y cobertura de especies particulares. Practicamente todos los taxa fueron organismos comunes de amplia distribucion en Chile, mostrando patrones comunitarios de composicion y estructura equivalentes a los documentados para la costa de Chile central. Se discute la necesidad de reevaluar el caracter biogeografico de las costas expuestas al Pacifico en la zona austral de Chile, y el rol de los procesos historicos en la costa noroeste de Chiloe considerando que el area de estudio no fue afectada por los avances glaciares a fines del Pleistoceno. EnglishThe northern part of the Chiloe Island (41.8°S) has been linked to an abrupt biogeographic break in the Southeastern Pacific; a break which represents the northern limit of the Magellanic Province, a large zone geographically characterized by a broken coastline as opposed to the Chilean coast further north. This study represents a first eco-biogeographical characterization of the rocky intertidal macrobiota along the northwest coast of Chiloe Island, a coastal line stretching nearly 50 km. Sampling was carried out at 5 sites using the same systematic design (transects perpendicular to the coast using 0.25 m² quadrats in 4 tidal levels), and the data were analyzed by using multivariate statistical methods. A total of 38 species were recorded, with a consistent zonation and dominance across sites, albeit minor differences due to local variations in abundance and cover of mobile and sessile species. Virtually all taxa were organisms widely distributed along the coast of Chile, showing patterns of community structure and composition similar to those documented for central Chile. We reinforce the need to reassess the biogeographic character of the coasts directly exposed to the Pacific in the austral zone of Chile, and the role of historical processes on the northwest coast of Chiloe having in mind that the study area was not affected by glacial advances in the late Pleistocene." @default.
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• W2394914511 date "2016-04-01" @default.
• W2394914511 modified "2023-10-18" @default.
• W2394914511 title "Biota del intermareal rocoso expuesto de la Isla Grande de Chiloé, Archipiélago de Chiloé, Chile: Patrones de diversidad e implicancias ecológicas y biogeográficas" @default.
• W2394914511 doi "https://doi.org/10.4067/s0718-19572016000100004" @default.
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