Theses and Dissertations
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Item Distribution of major alien invasive plants and impact assessment of Ageratina adenophora (Spreng.) K & R. in Kailash Sacred Landscape, Uttarakhand(Wildlife Institute of India, Dehradun, 2022) Chaudhary, Alka; Adhikari, B.S.; Rawat, G.S.The study was conducted to assess the spread, distribution, impact of invasion in Indian part of Kailash Sacred Landscape (KSL) characterized by interspersion of human habitations, extensive forest managed by the State Forest Department and local community institutions (Van Panchayat). The objectives of the study were (i) To model spatial distribution of selected plant invasive species using distribution modeling technique. (2) To assess the impacts of IAPs on native flora and relationship with habitat parameters (3) To analyze people's perception towards the spread of IAPs in KSL India landscape (4) Experimental trials on Eco restoration of habitats and prediction of future spread for better managementItem Ecology of alpine arid pastures with special reference to livestock grazing in upper Dhauli valley, Nanda Devi Biosphere Reserve, Western Himalaya.(2018) Mitra, Monideepa; Adhikari, B.S.; Rawat, G.S.Pastoral practices have been in existence in the alpine region of the Himalaya since millennia.The region is characterized by the presence of diverse pastoral practices such as sedentary, nuclear trans-humane, semi-nomadic, and nomadic pastoralism. These practices have strongly influenced the vegetation and ecology of the alpine rangelands, including local biodiversity. The region is broadly divisible into two distinct eco-climatic zones, viz., a moistal pine zone of Greater Himalaya and cold arid zone of Trans-Himalaya. These zones differ considerably in terms of physiognomy, species composition, history of livestock grazing and their ability to withstand grazing pressure. The objectives of the study were (i) To study the patterns of livestock grazing in the study area, (ii) To assess resource use by livestock, (iii) To assess the pasture quality (floristic) and quantity (biomass) in the study area, and (iv) to assess overlap in resource use between wild ungulates and livestock. The study was conducted in Upper Dhauli valley, situated in the cold arid region of Nanda Devi Biosphere Reserve (hereafter NDBR; 30º 08’-31º 02’N, 79º 12’- 80º 19’E) in Uttarakhand. The study was conducted in 2012 and 2014Item A study on floristic diversity and plant functional types across various landforms in upper Dhauli valley, Nanda Devi Biosphere Reserve, Western Himalaya.(Wildlife Institute of India, Dehradun, 2016) Kumar, Amit; Adhikari, B.S.; Rawat, G.S.In ecological systems, vegetation communities are shaped by various physiographic and edaphic factors which determine their structural and functional attributes. In Trans- Himalayan region of the state of Uttarakhand, limited studies on linkages of floristics, patterns of diversity in various vegetation communities and landforms are available. The region faces disturbances due to various natural and anthropogenic causes. The present research work attempts to assess the diversity of vascular plants, plant community structure and plant functional types (PFTs) in various landforms and physiognomic units in Upper Dhauli Valley, a cold-arid region and buffer of Nanda Devi Biosphere Reserve. This research work has not only generated information on the baseline ecological characteristics of various plant species and communities but also provides valuable management implications. The study is summarized in the following paragraphs. The Upper Dhauli Valley (UDV; ca. 727.7 km2; 30°46-54’N and 79°45-51’E) in Nanda Devi Biosphere Reserve was selected for intensive study. The UDV was added as a part of buffer zone of NDBR in 2002 and among the least studied valleys of the region with respect to floristics, floral assemblages and vegetation structure. It has three major watersheds namely, Amrit Ganga, Satyagad and Ganesh Ganga. The present study is based on the extensive surveys of various landscape features, landforms and physiognomic units. Reconnaissance survey in the entire valley was conducted in the year 2011. The field work comprised of floristic survey, systematic collection and record of plant specimens, vegetation quantification and collection of soil samples followed by laboratory analysisItem Systematics and ecology of Berberidaceae in Uttarakhand state.(Wildlife Institute of India, Dehradun, 2011) Tiwari, Umesh Kumar L.; Rawat, G.S.; Adhikari, B.S.