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Altitudinal change in plant endemism and species turn-over and diversity on Isla Santa Cruz, the Galapagos Island

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Title: Altitudinal change in plant endemism and species turn-over and diversity on Isla Santa Cruz, the Galapagos Island
Other Titles: ガラパゴス諸島サンタクルス島における植物の固有性、種の交代および種多様性の標高変化
Authors: Itow, Syuzo
Authors (alternative): 伊藤, 秀三
Issue Date: Apr-1992
Publisher: University of Hawaii Press
Citation: Pacific Science. 46(2) p.251-268 1992
Abstract: Vegetation zones of Isla Santa Cruz in the Galapagos Islands range from the lowland dry zone, through transition and moist zones, to the highland zone, reflecting the precipitation pattern. The zones are deflected upward on the leeward north side, as compared with the windward south side. The brown subzone and Miconia robinsoniana scrub of the moist zone are absent on the north side. Zonation and species distribution patterns are also related to altitude and substrate. Floristic and phytosociological endemisms for woody species increase with higher altitude, while those of herbaceous species are low in high elevations because of low endemism in pteridophytes. Species turnover rate along the altitudinal gradient is three times higher on the windward south side than on the leeward north side. Species diversity is low in Scalesia pedunculata forest, where stand-level dieback has occurred as a consequence of the species-poor constitution.
URI: http://hdl.handle.net/10069/6479
ISSN: 00308870
Rights: © by University of Hawaii Press
Type: Journal Article
Text Version: publisher
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/6479

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