The species composition, dominance and regeneration status of tree species were studied in two blocks of Achanakmar-Amarkantak Biosphere Reserve (AABR) namely [Block II (periphery) and Block I (interior)]. The tree density, sapling density and seedling density was higher in Block I as compared to Block II.

Plant resources are naturally occurring substances that are considered valuable in their relatively unmodified (natural) form. The value of such resources rest in the amount of the material available and the demand for it.

Long term ecological monitoring of biodiversity is practicable with an inventory of its floral and faunal diversity. With this view, the documentation of biodiversity of the two fenced areas of Dhanolti reserve forest of Mussoorie forest division has been prepared.

It is a well-known fact, that worldwide thousands of plant species are endangered and facing extinction with the
current trend of their exploitation and destruction. In recent years, there is a growing awareness concerning the impact
of temperature rise, industrialization, desertification and shift in the growing seasons of plants, loss of pollinators,
seed dispersers and increasing frequency of intense weather events such as drought, storms and floods making several valuable plants extinct.
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This correspondence refers to a recent note about monitoring alpine treeline in the Western Himalaya and few other
recent studies on the same aspect. Alpine zones in the Himalayas are the highest vegetation zones where seedbearing plants are found, but tree growth is excluded. Upper and lower boundaries of alpine zones are traditionally set as

Although recent and projected increases in atmospheric carbon dioxide can alter plant phenological development, these changes have not been quantified in terms of floral outcrossing rates or gene transfer. Could differential phenological development in response to rising CO2 between genetically modified crops and wild, weedy relatives increase the spread of novel genes, potentially altering evolutionary fitness?