Effect of biotic factors on plant succession of Govt. D.B. Girls P.G. College Campus Raipur (C.G.)
Aruna Shrivastava, V.L. Sharma
Department of Botany, Govt. D.B. P. G. Girls College, Raipur (C.G.) (India)
ABSTRACT
Vegetation is defined as organized plant cover of a region. Qualitative & quantitative approaches are being attempted for understanding the structural and functional aspect of vegetation. Both vegetation & soil are results of five groups of factors such as climate, parent rock, relief, organism & time. In a particular ecosystem soil & vegetation develop together & in the same direction. Succession direction & inter community change & can be considered as a progressive development from a simple to a more complex community .There are significant changes occurring both in soils & plant during the course of an ecological succession and these are related to time sequence of events and a parallelism is established between vegetation succession and the soils development in a given ecosystem. Secondary succession is a short term affair and usually gets submerged in primary succession. Disturbing agents such as grazing, trampling and fire building construction fore tells the characteristics of secondary succession which are typified by internal adjustment and orderly changes in primary succession. Grass land vegetation of college campus has been studied and all the lines of succession are observed leading to the same maximum developed stage in succession of weeds. The climatic climax is represented by a mixed deciduous type of forest of Acacia leucophloea, Delbergia sissoo, Caesalpinia pulcherrima, Cassia fistula, Casuarina, Delonix regia, Bauhinia purpurea etc. The weeds occur at every possible place during monsoon. The present paper is an attempt to reveal various probable lines of succession. After years of observation it is found that years after year the vegetation is in the same state of secondary succession due to biotic interferences, though number of species may vary with very little or no change in distribution of plant species and their numbers. within this vegetation.