Informatics Publishing Limited

Dhan Singh , Rajiv K. Srivastava , V. P. Khanduri

Abstract

Medicinal plants have attracted considerable interest in recent years. Commcrcial enterprises and local dwellers are regularly exploiting natural heritage of these mcdicinal plants. There is an urgent need of conservation of these valuable medicinal plants through cultivation. Poor marketing structure in the country is the primary challenge towards its promotion and cultivation. In Uttaranchal, attention has been given to conservation/cultivation and its open trading system by the government. The present paper highlights the cultivation and opcn trading aspects of medicinal plants in the State.

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Dhan Singh , V. P. Khanduri

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No abstract

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Dhan Singh , H. B. Vasistha

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The impact of silvi-pastoral measures on water conservation particularly on soil moisture, water holding capacity and infiltration rate were studied in limestone mined rehabilitated areas at lambidhar near Mussoorie, Garhwal Himalaya. Appreciable changes have been recorded for these parameters after 7 years of rehabilitation. A significant increase was recorded in soil moisture percentage, from 6.63 in un-rehabilitated control site to 26.55 in rehabilitated site. Similar trend was also observed in water holding capacity, which has increased from 18.33% (in control site) to 32.26% (in rehabilitated site). A significant reduction in infiltration rate was observed from 27.0 cm/hr in control site to 15.22 cm/hr in rehabilitated site. The pronounced impact on these hydrological parameters may be attributed to the combined effect of grasses, shrubs and trees used in silvi-pastoral measures.

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Dhan Singh , Y. P. S. Pundir

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The paper reports fifty wild medicinal plants used by the natives of Jaunsar-Bawar , Western Himalayas , Uttaranchal.

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Vijay Rawat , Dhan Singh , Pankaj Kumar

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No abstract

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Rajiv K. Srivastava , Dhan Singh

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Forest ecosystems are influenced by a variety of factors , both natural and human induced , which ultimately led to change in biodiversity and consequently changes the climate of existing system. Climate warming due to anti-environmental human activities has resulted a threat to biodiversity. Forest fire is one of the major factors , which influence the forest ecosystem and climate of the entire region. One factor may not solely responsible for any change in climate. This is a complex system in which biota; plants in particular , interact with climate and with atmospheric gases. Forests play an important role in sequestration of carbon globally. The study of impact of forest fire on existing forest ecosystem is inevitably required for the further mitigation to the problem. The present paper examines the impact of forest fire on climate change and forest biodiversity.

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Vijay Rawat , Dhan Singh , Pankaj Kumar

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Climate change is a phenomenon of completing over time scale of hundred , thousands and millions of years. The features like increased flooding , landslide and storm damage , increased death from heat strokes , failure of traditional agricultural system through drought are all scenarios , which could be due to climate change. Global warming may also have serious implications for forest ecosystems , especially for plantations and the matching of tree species with sites , which may be affected by changed climatic conditions. Forests play an important role in sequestration of carbon globally. The study of potential impact of climate change on existing forest ecosystem is inevitably required for the further mitigation to the problem. The present paper examines the impact of global climate change on forest biodiversity.

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Rajiv K. Srivastava , Dhan Singh , V. P. Khanduri

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Biological transformation of carbon is a primary mechanism for removing carbon from the atmosphere. Standing stock of vegetation plays a major role in carbon sequestration at present as well as in the future. This biospheric carbon sequestration is essentially a huge natural biological scrubber for all emission sources of carbon. An estimated value of 2GtC is removed from the atmosphere each year by the earth's mantle of vegetation. Forest fires the world over due to ever increasing population pressure, release stored carbon into the atmosphere in large quantities every year. Forest fires not only damage the forest wealth but also release huge amount of the secured storage of carbon in the form of forests into the atmosphere. The present paper examines the carbon sequestration and consequences of forest fire carbon emission to the climate.

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V. P. Khanduri , Dhan Singh , Sumer Chandra , C. M. Sharma

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Y. P. S. Pundir , Dhan Singh

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The paper reports forty wild edible food plants used by the natives of Jaunsar - Bawar tribal area. A list of 137 more wild food plants already reported from this area by the authors is also given.

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