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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP
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    Abstract - Issue Jan 2026, 47 (1)                                     Back


nstantaneous and historical temperature effects on a-pinene

Carbon stock and tree diversity across land-use systems in the heterogeneous landscapes of the GKVK biodiversity heritage site

 

T.S. Sumanth1*, R. Krishnamurthy2 and H.B. Raghu1     

1Department of Forestry and Environmental Science, UAS, Gandhi Krishi Vignana Kendra, Bengaluru-560 065, India

2Department of Soil Science and  Agricultural Chemistry, UAS, Gandhi Krishi Vignana Kendra, Bengaluru-560 065, India

 

Received: 31 January 2025                   Revised: 21 April 2025                   Accepted: 15 October 2025

*Corresponding Author Email : suman64logia@gmail.com                       *ORCiD: https://orcid.org/0000-0001-7204-0915

 

 

 

Abstract

 

Aim: This study aims to evaluate tree diversity and carbon stocks across diverse land-use systems within the heterogeneous landscape of the GKVK Biodiversity Heritage Site, Bengaluru.

Methodology: A random quadrat sampling method (135 quadrats of 20 m2) was used to measure tree diversity (Shannon (H´), Simpson (1-D), species richness) and population structure (basal area, stem density, girth class). Carbon stocks were estimated using non-destructive allometric equations based on tree diameter and wood density.

Results: During the course of study, 1,611 individuals from 75 species were reported. Gardens exhibited the highest biodiversity (H´ = 3.35; 1-D = 0.95; species richness = 56) and stem density (370 individuals ha-1) whereas agricultural lands showed the lowest diversity (H´ = 1.46;1-D: 0.61; species richness =13) and stem density (67.19 individuals ha-1). Plantations with the highest stem density (488.89 individuals ha-1) contributed significantly to carbon sequestration, boasting the maximum average basal area (12.38 m2 ha-1) and carbon stock (49.39 Mg ha-1). A strong correlation (r=0.985, p<0.0001) between basal area and carbon stock underscores the role of forest structure in carbon storage. Medium- and large-diameter trees were identified as key contributors to carbon stock.

Interpretation: This study revealed that tree diversity and carbon stocks vary significantly across land-use systems, with gardens exhibiting the highest biodiversity and plantations contributing the most to carbon sequestration. Medium- and large-diameter trees are crucial for carbon storage, highlighting the importance of conserving mature trees and improving biodiversity. These findings offer insights for promoting sustainable land management and enhancing carbon capture.

Key words: Carbon stock, Diversity, Heterogenous landscapes, land use systems

 

 

 

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