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Abundance and habitat-suitability relationship deteriorate in fragmented forest landscapes:a case of Adinandra griffithii Dyer,a threatened endemic tree from Meghalaya in northeast India

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Ecological Processes 2018年第1期7卷 23-31页

作者： Dibyendu Adhikari Aabid Hussain Mir Krishna Upadhaya Viheno Iralu Dilip Kumar Roy Department of Botany North-Eastern Hill UniversityShillong 793022India Department of Environmental Studies North-Eastern Hill UniversityShillong 793022India Department of Basic Sciences and Social Sciences North-Eastern Hill UniversityShillong 793022India Botanical Survey of India Eastern Regional CentreShillong 793003India

Introduction:A strong positive‘abundance and habitat-suitability’relationship is crucial for conservation of ***,anthropogenic alteration of natural landscapes leading to land use and land cover change,habitat loss,and species extinctions(may)have putatively disturbed this ***,it is important to study the nature of the relationship in such human influenced ***:In this study,we endeavored to understand the consistency of the relationship in the fragmented natural landscapes in the Khasi,Garo,and Jaintia hills of Meghalaya in northeast India,with Adinandra griffithii(an endangered endemic tree)as a model *** reconstructed the distribution of its suitable habitats as a function of the remotely sensed vegetation phenology(i.e.,EVI data),using point occurrence data and ecological niche modeling(ENM)*** of the abundance and habitat characterization was done through field surveys following standard ***:The study revealed that remotely sensed landscape-level vegetation phenology could effectively discriminate the suitable and unsuitable habitats of threatened *** regression model showed a weak positive correlation between abundance and predicted habitat suitability for adult trees indicating(plausible)deterioration in the ***,sapling and seedling populations did not show a precise trend in this ***-based studies revealed that removal of the species from the suitable habitats because of anthropogenic disturbances possibly weakened the abundance-suitability ***:The findings of the study enjoin the need for re-establishment of the species in the suitable areas for its conservation and perpetuation.

关键词： abundant-center hypothesis Species abundance Habitat suitability EVI ENM

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