Invasive alien species that is non-indigenous to an area, and which may have harmful effect on human, animal, plant health as habitat destruction, degradation and fragmentation of ecosystems. During the study observed the present status of plant diversity of invasive alien species (IAS) in Tehri District of Garhwal Himalaya, Uttarakhand. Data were collected through extensive field survey and quadrat method. Result observed that 75 Forest Invasive Species (FIS) and 47 weed species documented from the area. Among the 75 FIS, 12 species belonging from Asteraceae, 7 species from Poaceae, 7 species of Solanaceae, 5 species of Lamiaceae, followed by four species of each Ranunculaceae and Polygonaceae while the other belongs to Papilionaceae, Cyperacea, Euphorbiaceae and various other angiospermic families were recorded. Weed Species from 5 different angiospermic families were recorded. The highest diversity was reported for Asteraceae family. Species diversity of IAS indicated that study area was distinctly dissimilar or unlike in diversity and unhealthy. An investigation of the habitat depicts that herbs prevail (11 species) followed by shrubs (8 species) and trees (2 species). However, major impact of these species on the indigenous flora, change in hydrology and function of ecosystems is yet to be studied. There is an urgent need to develop regional data, information on their ecology, morphology, reproductive biology, phenology and physiology for effective management and control of IAS. Present Study will helpful in further study on developing effective management and control protocol of IAS on spreading outside their natural habitat and most prominent menaces to biodiversity.
Aootract. The pi.rer presents results of a revegetation programme to stabilize on excavated rock j:hospnte mine area. The programme ellljXlB.Sized on using ecologically, economically and sociaJJ;y viable plant si:;ecies which resulted in "Green revolution" of the degraded mined area within a short spi.n of six years.Details of reclaims.tion methcds adopted, results of ecological monitoring of floral and faunal density and diversity in revegetated areas have been presented.
The present study was undertaken to understand the community behaviour of Nardostachys jatamansi in three different sub sites viz., maximum, moderate and minimum density levels in the alpine areas of Kedarnath region of Rudraprayag district in Uttarakhand. The results reveal that the density was highest in the maximum sub site followed by in the moderate and minimum sub sites. Analysis of vegetation revealed that between different densities the community composition did not vary much. Although between various sub sites the density varied significantly between maximum, moderate and minimum categories, comparison of mean density of the area. Maximum density was represented by a total of fifteen plant species, while moderate and minimum densities showed twelve and thirteen plant species respectively.
Litter fall and nutrient return was studied in four different age stands (11years, 8 yrs, 6 yrs & 4yrs old plantation) of Kiyarkuli catchment of Doon Valley of Garhwal Himalaya around Mussoorie hills(300 25’ to 300 30’ N lat. and 780 0’ to 780 5’ E long., 1700 to 1850 m above MSL). Maximum litter fall was estimated in Site I and minimum in Site IV. The trend of annual nutrient return was in order of Ca > N > K > Mg > P for all sites.
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