Abstract
Understanding community structure together with regeneration and disturbance provides a holistic purview of forest health and the necessary management implications essential for conservation. These aspects were studied independently or under specific elevational zone in Central Himalayas; therefore, this study was undertaken to understand the key relations and to access the status of major protected Central Himalayan forest types. The parameters were accessed using standard quadrat technique in eight major reserved and protected forest types along an elevational gradient (333–3375 m). Tropical moist deciduous forest had the highest stem density (457 tree ha−1), species richness (21 species), richness index (Margalef’s index: 3.67) and diversity index (Shannon-Wiener index: 2.63). Quercus semecarpifolia-Rhododendron arboreum association forest had the highest total basal area (94.75 m2 ha−1). Species predominantly showed clumped dispersion pattern. Climax Himalayan species viz. Shorea robusta, Quercus oblongata, and Abies spectabilis have poor regeneration which have modified the community into decreasing to unimodal distribution. Total basal area explained 71.9% (p < 0.001) of the total variation in species dominance. Species richness, diversity, and evenness indices showed strong significant positive correlations which are also evident in the species-sequence curves with species diverse sites having wider spread. Anthropogenic surface fires in sub-tropical Pine forest while grazing and lopping for fuelwood requirements in temperate and sub-alpine forests are major disturbance parameters. The results signify that these forests have not yet attained maximum diversity. Monitoring the regeneration of important native and climax species along with co-operation from local communities is key for efficient management of these forests.
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Acknowledgements
Authors acknowledge the assistance and necessary field permissions from the Principal Chief Conservator of Forest (Chief Wildlife Warden), Uttarakhand; Director Rajaji National Park, DFOs for Kedarnath Wildlife Sanctuary, Chakrata and Dehradun forest division. The authors are thankful to the Head, Department of Botany, University of Delhi for providing the necessary facilities to conduct the study. The authors also acknowledge the assistance by Ravi Kumar and Aakash Goswami in the field. We duly acknowledge the cartographic help from Sharanjeet Kaur. The authors also thank the anonymous reviewers whose constructive comments helped to shape this manuscript to its present form.
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The authors are thankful to the Science and Engineering Research Board (SERB), Government of India for providing complete financial assistance through the research Project No. EEQ/2016/000164. The first author also thanks the University Grants Commission (UGC), New Delhi for providing Junior Research Fellowship. The corresponding author also acknowledges and thanks the Institution of Eminence (IoE), University of Delhi for providing Faculty Research Programme (FRP) grant for the year 2020–21.
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Kaushal, S., Siwach, A. & Baishya, R. Diversity, regeneration, and anthropogenic disturbance in major Indian Central Himalayan forest types: implications for conservation. Biodivers Conserv 30, 2451–2480 (2021). https://doi.org/10.1007/s10531-021-02203-w
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DOI: https://doi.org/10.1007/s10531-021-02203-w