Population and Community Structure Pattern of Juniperous polycarpos K. Koch with Climate Change Effect in the Cold Desert Trans Himalayan Region, India

摘要

Juniperus polycarpos L. is one of the most threatened and livelihood plant species of the Himalayan region. The present study provides information about monitoring of its populations and proliferation rate in high altitude regions of Trans-Himalaya. The survey revealed comprehensive information on J. polycarpos such as distribution range, habitat characteristics, composition, structural pattern, population size, uses and diversity status. Its distribution and density were maximum in pure forest habitats as compared to mixed habitats recorded. Middle forest altitudinal zone (3100-3500 m for dominant J. polycarpos community and 2710-3100 m for mixed communities) showed suitability for its growth and high density. The occurrence of species above treeline altitudinal zone (4000 m) indicates effect by climate change. A total 281 species (158 genera, 48 families, 37.04% native, 2.06% endemic, 23.87% near-endemic, 74.44% economically important and 20.28% threatened species) were recorded within its populations. Frequent monitoring of populations under climate change scenarios is suggested.