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Abstract <p>The present study investigates the community structure, composition, and carbon sequestration potential of eastern Himalayan mixed coniferous forests, highlighting their role in climate change mitigation. The study was carried out in Talley Valley Wildlife Sanctuary of Arunachal Pradesh, a part of the eastern Himalayan biodiversity hotspot, using a random quadrat (10 × 10 m) sampling approach. The results revealed a total of 99 tree species from 50 genera and 32 families. The calculated tree density of 1028 ± 17 individuals/ha and basal area of 54.79 ± 1.07 m<sup>2</sup>/ ha emphasize the ecological importance of these forests. Diversity indices further highlighted the ecosystem’s complexity, with a high Shannon-Wiener diversity index (3.9), low Simpson’s index (0.03), Margalef’s species richness index of 15.1, and an evenness index of 0.84. Importantly, the study estimated that the tree carbon density was 157.29 ± 2.49 t/ha, equivalent to sequestering 256.52 ± 4.94 t/ha of CO<sub>2</sub> and the total carbon stock (TCS) was estimated to be 274.4 ± 8.42 t/ha. Among the species, <i>Cedrus deodara</i> was the largest contributor to carbon stock potential. Population structure revealed an expanding tree population in lower girth classes, following a reverse J-shaped pattern. Positive associations were observed between tree structural attributes and carbon stock, emphasizing the importance of forest structure in influencing carbon sequestration potential. Therefore, for appropriate potential carbon stocking in a forest, heterogeneity in both species diversity and stand structure must be considered.</p>

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Tree Species Diversity, Distribution Patterns and Carbon Stock Potential of the Mixed Coniferous Forest of Arunachal Pradesh, India

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • Bijay Thakur,
  • Bidya Sagar Deka,
  • Bidyut Sarania,
  • Awadhesh Kumar,
  • Ashalata Devi

摘要

Abstract

The present study investigates the community structure, composition, and carbon sequestration potential of eastern Himalayan mixed coniferous forests, highlighting their role in climate change mitigation. The study was carried out in Talley Valley Wildlife Sanctuary of Arunachal Pradesh, a part of the eastern Himalayan biodiversity hotspot, using a random quadrat (10 × 10 m) sampling approach. The results revealed a total of 99 tree species from 50 genera and 32 families. The calculated tree density of 1028 ± 17 individuals/ha and basal area of 54.79 ± 1.07 m2/ ha emphasize the ecological importance of these forests. Diversity indices further highlighted the ecosystem’s complexity, with a high Shannon-Wiener diversity index (3.9), low Simpson’s index (0.03), Margalef’s species richness index of 15.1, and an evenness index of 0.84. Importantly, the study estimated that the tree carbon density was 157.29 ± 2.49 t/ha, equivalent to sequestering 256.52 ± 4.94 t/ha of CO2 and the total carbon stock (TCS) was estimated to be 274.4 ± 8.42 t/ha. Among the species, Cedrus deodara was the largest contributor to carbon stock potential. Population structure revealed an expanding tree population in lower girth classes, following a reverse J-shaped pattern. Positive associations were observed between tree structural attributes and carbon stock, emphasizing the importance of forest structure in influencing carbon sequestration potential. Therefore, for appropriate potential carbon stocking in a forest, heterogeneity in both species diversity and stand structure must be considered.