PhD Theses (WII)

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Author: search.filters.author.Uniyal, V.P.Subject: search.filters.subject.Community structure

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    Community Structure of Dung Beetles in Kailash Sacred Landscape, Pithoragarh, Uttarakhand, India
    (wildlife Institute of India, Dehradun, 2020) Chauhan, Mona; Uniyal, V.P.; Chandra, Kailash
    Due to the recent wave of urbanization, mountain areas are being transferred into urban and agriculture land at alarming rates. The Kailash Sacred Landscape, Pithoragarh, Uttarakhand, India is highly vulnerable due to fragmentation and urbanization, including increased anthropogenic disturbance, reduced area, loss of habitats, invasion of new species and ecological transformations. Therefore, it is important to document the status of biodiversity prevailing in these areas to identify the level of biodiversity still left in forest fragments. No records exist about the community structure of dung beetles in the landscape and hence we lack crucial historical documentation of the natural communities in landscape which would remain as an important source of information for measuring species extinctions in the area. This study provides basic inventory and diversity pattern of dung beetles from the undiscovered area of the Kailash Sacred Landscape, Pithoragarh, India. This study also suggested bioindicator based ecological monitoring and excellent insight for future conservation and management planning which will help the managers to set priority areas for habitat improvement or restrict areas to deteriorate any further. The study area is Kailash Sacred Landscape (KSL), Pithoragarh, India part exhibits great variability and heterogeneity in altitude and topography, due to this ecosystems of this region vary widely from subtropical to temperate, alpine, and cold high altitude desert types. Similarly, the landscape harbors a high diversity of flora and fauna of both regional and global significance.
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    Soil Nematode community structure along elevational Gradient in Bhagirathi Basin, Uttarakhand - A Morphological and Molecular approach.
    (Wildlife Institute of India, Dehradun, 2021) Kashyap, Priyanka; Uniyal, V.P.
    Gangotri National Park (GNP) is a protected area and has fewer human disturbances, allowing soil nematodes to diversify. However, it has harsh climatic conditions at high altitudes, which may hinder the nematode community structure. Systematic study of the soil inhabiting nematodes associated with forest vegetation of Gangotri National Park is discussed in this thesis. A compiled inventory of the soil nematode genera recorded from GNP during this study has also been provided in this thesis. A total of 62 nematode genera and fifteen species were identified from high altitude region of GNP. vegetation type is a significant factor for soil nematode diversity as every vegetation type has a different local environment and physicochemical properties that affect the soil biota, specifically soil nematodes being present at various trophic levels in the soil food web. Among the various vegetation types in Gangotri National Park's high-altitude areas, there are substantial differences in the taxonomic composition, the energy flow channels, and nematode community structures, which provide actual examples for understanding the role of soil nematodes in key soil ecological processes in the region. This study is a pioneer study in the region evaluating the effect of vegetation type on soil nematode diversity therefore, more similar studies are required to comprehend the relationship between nematode diversity and soil ecosystems of high altitude vegetations.
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    Systematics and diversity of spiders (Araneae) in Nanda Devi Biosphere Reserve
    (Wildlife Institute of India, Dehradun, 2011) Quasin, Shazia; Uniyal, V.P.
    The present study was carried out in Nanda Devi Biosphere Reserve (NDBR), Uttarakhand, India, which is located in the northern part of the Western Himalaya in India, one of the important sites of wilderness and biodiversity in the Himalayan region. This study was selected for its conservation value, representation of biome and little existing information. The present study was conducted from January 2008 to July 2011. The study aimed to investigate the spider community structure along the altitudinal gradient and the influence of habitat covariates like vegetation types, ph, litter depth, humidity and temperature, on spider assemblages in the intricate landscape of the NDBR. The pattern of species diversity was explored using a set of standard methods and ecological indices. This study obtained the first comprehensive representation of the spider fauna in NDBR, which would help in assessing the status of spider diversity in the region keeping in mind its conservational value. This study revealed the relative importance of diverse habitat types on diversity and composition of spider assemblages in NDBR.