Sarkar and Mazumder Int. J. Pure App. Biosci. 4 (5): 133-143 (2016) ISSN: 2320 – 7051 Copyright © October, 2016; IJPAB 133 A Surveillance to Evaluate the Diversity, Dominance and Community Structure of Tree Species in Nagrakata Forest Beat of Chalsa Forest Range, West Bengal, India Anup Kumar Sarkar * and Mallika Mazumder Department of Botany, Prasanna Deb Women’s College, Jalpaigui,West Bengal, 735101, India *Corresponding Author E-mail: anupsarkar.jpg@gmail.com Received: 16.10.2016 | Revised: 25.10.2016 | Accepted: 26.10.2016 INTRODUCTION Forests are the repositories of natural wealth that support the ecological balance of the earth. They are regarded as one of the most species rich terrestrial ecosystems. They are distinguished from all other terrestrial ecosystems by a very high diversity in many levels (species, life forms, etc). Each forest is also an impotant natural resource that plays several important roles in nature. As a whole it is a repository of biodiversity. The forest biodiversity of the world is now getting depleted alarmingly as a result of various factors like habitat loss, pollution, introduction of exotic species, over exploitation and other anthropogenic activities. Biodiversity is a short form for biological diversity which is to describe the total number, variety and variability of living organisms as well as the diversity of the ecosystem they are living in. Biological diversity implies the variety of living organisms and includes diversity within species, between species and of ecosystems and the ecological processes of which they are a part 1 . It also provides essential services including nutrient cycling, air and water purification, drought mitigation and soil recuperation. It provides the raw materials for medicine, food and house holding things. Thus conserving of forest biodiversity is really a critical task. Measuring of community is one of the central issues in ecological studies because of its importance in devising biodiversity conservation strategies. Available online at www.ijpab.com DOI: http://dx.doi.org/10.18782/2320-7051.2395 ISSN: 2320 – 7051 Int. J. Pure App. Biosci. 4 (5): 133-143 (2016) ABSTRACT For better understand of forest ecosystems it is important to study the Phytosociological aspects and diversity pattern of plants in these ecosystems. Phytosociology deals with plant communities, their composition, development, and the relationships between the species within the ecosystem. The structure of a community is determined mainly by the dominating plant species and not by other characteristics. The quantitative characters with reference to density, diversity and frequency distribution could well act as indicators of disturbances that are affecting the various forest types and such studies would help in understanding the threats that are being faced by the forests and would help in deriving conservation policies. The present research is an attempt to assess the phytosociology of tree species in Nagrakata forest beat. Key words: Biodiversity, Phytosociology, Quadrate, Dominance, IVI, Community indices. Research Article Cite this article: Sarkar, A.K. and Mazumder, M., A Surveillance to Evaluate the Diversity, Dominance and Community Structure of Tree Species in Nagrakata Forest Beat, Chalsa Forest Range, West Bengal, India, Int. J. Pure App. Biosci. 4(5): 133-143 (2016). doi: http://dx.doi.org/10.18782/2320-7051.2395