006216 Negi H R (Biodiversity Div, Institute of Himalayan Bioresource Technology (Council of Scientific &, Post Box No. 6, Palampur-176 061) : Abundance and diversity of moss communities of Chopta-Tunganath in the Garhwal Himalaya. J Bombay Nat Hist Soc 2002, 99(3), 418-33.
A total of 8,155 colonies of moss from 12 plots of 50 m x 10 m, from four vegetation (macrohabitat) types along gradients of disturbance and elevation (1,400-3,700 m) in the Chopta-Tunganath landscape of the Garhwal Himalaya, yielded 34 families with 87 genera and 177 species. Thuidium cymbifolium, Entodon rubicundus, and Racomitrium subsecundum were wide-niche species, occupying all the three major substrates (microhabitats), namely rock, soil and wood, whereas Tetraplodon mnioides and Timmia megapolitana were rare, encountered only once during the survey. Macrohabitats and microhabitats were compared with respect to alpha- and beta-diversity of the moss flora. Amongst the macrohabitats, the high altitude (2,900-3,200 m) Rhododendron forest had the richest moss communities followed by the middle altitude (2,500-2,800 m) Quercus forest. Amongst the microhabitats, soil was richer than wood and rock substrates. Species, genus and family level, alpha- as well as beta-diversities were significantly correlated with each other, implying that the higher taxonomic ranks such as genera may be used as surrogates of species for effective periodic monitoring and assessment of moss biodiversity. While unregulated human activities such as excessive fuel wood collection, tourism and fire may adversely affect the diversity of moss, seasonally regulated livestock grazing seems to have no marked impact.
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