G. S. Rajwar , Subodh K. Gupta

Abstract

The vegetation of Garhwal Siwalik hills between the rivers Khoh and Ganges has been studied for various phytosociological parameters. The forests on sites 1 to 5 consisted of Holoptelea - Terminalia, Adina - Schleichera. Shorea - Mallotus, Bischofia - holoptelea and Acacia Dalbergia communities respectively. The total tree density and the hasal cover of the forests have heen compared with those of certain tropical and temperate forests of the world. These forests are the extension of Himalayan temperate forests.

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Anil P. Joshi , Subodh K. Gupta , Arun K. Agrawal , A. Chaudhary

Abstract

A tolal of 30 species were found in the forest floor of Pinus roxburghil Sarg. Grasses dominating over dicots, dominating species being Eragrostis brachyphylla. E. pilosa and Eriophorum gracile. Nineteen out of 30 species were found associated. The association coefficient for significantly associated species varied from + 0.63 to + 0.98 for positive and −0.466 to − 0.777 for negative associations. Densities of species pairs correlated significantly. These species were further analysed for regression equation.

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G. S. Rajwar , Subodh K. Gupta

Abstract

The biological spectrum of Garhwal Siwalik has been studied in relation to the environment. Life forms in the order of importance recorded were therophytes (62.8%), phanerophytes (26.8%), chamaephytes (5.7%), geophytes (4.5%) and hemlcryptophytes (0.2%). The vegetation appears to be predominating by phanerophytes except the river banks and other disturbed areas where therophytes are dominating.

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