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Deterended correspondence analysis of vegetation in district tor ghar, Westrn Himalaya

Azhar Mehmood, Abbas Hussain Shah, Azhar Hussain Shah, Shuja Ulmulk Khan, Habib Ahmad

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J. Bio. Env. Sci.9(2), 1-16, August 2016

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Abstract

District Tor Ghar is phytosocilogically unexplored region in the western Himalaya. Field survey was carried out during the summers of 2012 and 2013 to study floristic diversity in the region. The vegetation data collected from whole district was analyzed using DECORANA, computer programs. Species abundance data were used in CANOCO version 4.5 for DCA. Deterended correspondence analysis (DCA) identified three vegetation zones in the study area on the basis of ecological amplitude. The results were interpreted with major environmental gradients. Ordination of the site and species for herbs, shrubs and trees reported from study area by DCA indicated that the 1st two axes showed best correlation and eigenvalues from 3rd and 4rth axes revealed less representation. The distribution of plant species on DCA axis 1 indicated that altitude was the main gradient affecting the distribution of most of the plant species. Some species showed no correlation with other plants which was indication of specific locality. The Ordination diagram revealed that the plants of habitats located at the left side of the DCA diagram representing humid subtropical habitat which were more influenced by anthropogenic disturbances. The plant species located at right side of the ordination diagram showing moist temperate and sub alpine habitats. The results of the present research also revealed that elevation, temperature and slope were the main factor affecting the distribution of plant species. These results will be used as base line to study vegetation analysis in future with reference to different ecological conditions.

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Deterended correspondence analysis of vegetation in district tor ghar, Westrn Himalaya

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