Evaluating the Effecst of Soil Ph and Moisture on the Plant Species of Changa Manga Forest Using Van Dobben Circles

2 Abstract: Diversity entails variation in the species having large number.There always a difficulty in the interpretation of the data yielded by the community samples because of the noisy data. And magnificent means are provided by the Multivariate methods for structuring such data. Changamanga forest was divided into four zones. Total 200 quadrats of 1m x 1m were laid down in whole of the forest. Species richness/abundance response to environmental gradients was investigated by using Van Dobben circles for a selected variable i.e. soil moisture and soil pH. Result shows that Rumexcrispis, Sonchusoleoraceous, Prosopis cineraria, Desmostachyabipinnata, cynodondactylon, Malvastrumcoromendialinum, Ageratum conyzoid, Sonchusarvensisand Conyza Canadensis hold high positive response towards the positive circle of moisture while Conyzabonariensis, Menthaspicata, Partheniumhysterophorous, Suaedafruiticosa, Prosopis cineraria, Chenopodium album, Ranunculasmuricatus, Stelleria media and Taraxacumofficinaleshow negative response toward the soil moisture. Prosopis cineraria.Conyzabonariensisshows the higher response towards the pH.Menthaspicataand Partheniumhysterophorus, Suaedafruiticosa, Tarxacumofficinale, Cenchrusagrimonioides, Convolulusarensisand Cirsiumarvense, Oxalis cornuculatashows high negative response towards the pH variable. pH does not produce greatly effect on the plant present in the Zone-I and zone-III. The specie richness and pH relationship is monotonic positive. many species remain uneffected by the pH 3-7. That is why pH not showing much effect towards the species abundance as CMF pH lies in the range of 7.