Abstract
The present investigation was carried out on distribution of soil types, vegetation and tree species diversity in Eastern Ghats of Srikakulam District, Andhra Pradesh, India. The inventory of tree species was done in 40 different forest areas of Srikakulam district. All the sample plots are tropical and moist thorny forest and dry thorny scrub forests of Srikakulam district. The soils of the study area are compressed red soils, loamy soils, sandy loams, with varying proportions of sand and clay and it constitute 96% of the total area; red sandy soil is the common type. Tree species richness varied according to the disturbance gradient in the different stands, a total of 4744 individuals, belonging to 129 species, 96 genera among 46 families from 40 line transects were recorded in the study area. Species richness ranging from 47 to 9 in a transect was recorded in the present study. Highest species richness of sizes 47 for 65-N/14 (SW-3, 65N-14 NW-3) was seen at Haddubanghi and lowest diversity 9 was seen at Korasanda 74-B/1(SE-1). Key words: Soil types, vegetation, tree species diversity, Srikakulam district.
Highlights
Biodiversity is used in describing the diversity of life on earth, it includes all life forms and the ecosystem of which they are part
Studies from forest survey of India showed that an average of 54% of forest is effected by fire and 72% of forest area is subjected to grazing annually, 3.73 million hectors of forest area are burnt resulting in economic losses of approximately 440 crores (MOE,1999)
The inventory of tree species was done in 40 different forest areas in Srikakulam district
Summary
Biodiversity is used in describing the diversity of life on earth, it includes all life forms and the ecosystem of which they are part. Dry deciduous forests are among the most exploited and endangered ecosystems of the biosphere (Murphy and Lugo, 1986; Gentry, 1992). Dry deciduous forests are among the most exploited and endangered ecosystems of the biosphere (Janzen, 1988; Gentry, 1992). Over exploitation is to severely reduce the population sizes below the critical level and the survival of the species. Distribution and population structure of tropical forests of Eastern Ghats are poorly understood. We analyzed the structure of tropical deciduous forests in Srikakulam district of Eastern Ghats, Andhra Pradesh, India
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