Impacts of anthropogenic disturbance gradients on vegetation dynamics in the hyper-arid desert environment

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  • Understanding vegetation patterns along anthropogenic disturbances is critical for conserving and managing woodland habitats. This research focuses on floristic diversity, plant functional groups, and the factors that influence vegetation structure in arid open woodland vegetation. For this purpose, the floristic diversity of 24 releves from three habitat types distinguished by varying levels of disturbance (high, low, and medium disturbed) was examined in connection with anthropogenic variables. This study aimed to: (i) characterize species composition, distributions and diversity patterns in the woodland habitats, (ii) study the plant functional groups based on growth form, life span and Raunkiaer plant life-form, and (iii) investigate most influencing anthropogenic factors that affect vegetation dynamics, in the arid open woodland vegetation. The results indicated that diversity decreases with increasing levels of anthropogenic stress. The assessment of plant diversity utilized various metrics, including the Shannon index for diversity, evenness, and species richness. To gauge plant species richness, rarefaction curves were employed, and their outcomes were juxtaposed with Renyi diversity profile values. Our findings elucidated that the distribution of perennial abundance and the relative prevalence of weedy species serve as reliable proxies for discerning the impact of grazing on vegetation. The results depicted that the maximum species were unique to low-disturbed habitat types, and 8 species were common in all habitat types. Specifically, human campsites and livestock grazing emerged as influential factors. We emphasize that identifying threats to ecological processes and ecosystem functioning is essential for effective longterm conservation interventions. Comprehending these relationships could offer insights conducive to sustainable woodland management practices and advancing biodiversity conservation efforts in such delicate arid regions.