Phyto-regeneration and diversity indices of West Rajabhatkhawa Range of Buxa Tiger Reserve of West Bengal, India

Q4 Environmental Science

Ecology, Environment and Conservation Pub Date : 2023-01-01 DOI:10.53550/eec.2023.v29i01.040

D. Pradhan, Amarendra Nath Dey, S. Chakravarty, D. Mukhopadhyay, Arup Sarkar, Aranava Ghosh

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Abstract

The present study was carried out to investigate tree species diversity, population dynamics, and tree species regeneration patterns at Rajabhatkhawa Range of Buxa Tiger Reserve of West Bengal to better understand the regeneration dynamics and population structure of tree species. A total of 140 quadrats (size 2m × 2 m) were set with the sampling intensity 0.1% for regeneration survey of the area by following random quadrat sampling method. This study documented about ”106" regenerating tree species, representing “74” genera and “40” families from the study area from which about “47” percent of tree species showed “good” regeneration status. Monoon simiarum had highest seedlings density with 8125.00 seedlings ha-1 followed by Aglaia spectabilis (4642.86 seedlings ha-1). Monoon simiarum showed highest IVI index of 15.19, followed by Aglaia spectabilis (10.41). About 9 percent of the species had “fair” regeneration status and 8 percent had “poor” regeneration status, the fair or poor regeneration might be due to insufficient seed dispersal that limits native species colonisation. However, it was observed that a total of 18 percent of tree species were classified as “not regenerating” and again 18 percent of tree species that were present in either sapling or seedling stage but no adult stage were categorized as new regeneration.

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印度西孟加拉邦Buxa老虎保护区西Rajabhatkhawa山脉植物再生及多样性指数

本研究对西孟加拉邦Buxa老虎保护区Rajabhatkhawa Range的树种多样性、种群动态和树种更新模式进行了调查，以更好地了解树种更新动态和种群结构。采用随机样方抽样法，设置140个样方(大小2m × 2m)，采样强度为0.1%，对该地区进行再生调查。本研究共记录了研究区40科74属106种再生树种，其中约47%的树种表现出良好的再生状态。单叶茅(monon simium)的幼苗密度最高，为8125.00株ha-1，其次是Aglaia spectabilis(4642.86株ha-1)。单叶茅(monon simium)的IVI指数最高，为15.19，其次是Aglaia spectabilis(10.41)。大约9%的物种具有“一般”的再生状态，8%的物种具有“较差”的再生状态，一般或较差的再生可能是由于种子传播不足，限制了本地物种的定植。然而，共有18%的树种被归类为“不再生”，18%的树种在树苗期和幼苗期都存在，但没有成虫期被归类为新再生。

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Ecology, Environment and Conservation Environmental Science-Nature and Landscape Conservation

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期刊介绍： Published Quarterly Since 1995. Ecology, Environment and Conservation is published in March, June, September and December every year. ECOLOGY, ENVIRONMENT AND CONSERVATION is one of the leading International environmental journal. It is widely subsribed in India and abroad by Institutions and Individuals in education and research as well as by Industries, Govt. Departments and Research Institutes.