Unveiling tree diversity and carbon density of homegarden in the Thodupuzha urban region of Kerala, India: a contribution towards urban sustainability

Tropical Ecology - Tập 62 - Trang 508-524 - 2021
Babu Padmakumar1, N. P. Sreekanth2, V. Shanthiprabha2, Joby Paul3, K. Sreedharan4, Toms Augustine5, K. K. Jayasooryan4, M. Rameshan6, V. Arunbabu1, Mahesh Mohan1, V. P. Sylas1, E. V. Ramasamy1, A. P. Thomas2
1School of Environmental Sciences, Mahatma Gandhi University, Kottayam, India
2Advanced Centre of Environmental Studies and Sustainable Development, Mahatma Gandhi University,Kottayam,India
3St Thomas’ College, Thrissur, India
4Centre for Water Resources Development and Management, Calicut, India
5The Directorate of Environment and Climate Change (DoECC), Thiruvananthapuram, India
6UNDP, LLPMU, Office of Wildlife Warden, Munnar, India

Tóm tắt

The present study aimed to assess the role of homegarden (HG) in safeguarding the tree diversity and carbon (C) density or storage in the Thodupuza urban region of Idukki district in Kerala, India. A stratified random approach was used for selecting the four homegardens (HGs) with a size of 1hectare (ha). The study mainly focused on species richness, diversity, above ground biomass, carbon, correlation and distribution of carbon with various variables, species and group wise carbon storage of the system. A total of 992 trees from 66 species belonging to 31 families were enumerated with representation of 4 endemic, 1 vulnerable, 1 endangered and 23 exotics. The diversity indices obtained were closer to those of the forest ecosystem. Above ground biomass and carbon density were estimated to be 67.06 t/ha (tonne/hectare) and 31.85 6 t/ha respectively. Species Tectona grandis showed dominancy in carbon and Important Value Index. Correlation analysis among species revealed that carbon exhibited a strong positive trend with basal area and tree density, but in the case of plot (HG)-wise examination only basal area had a strong positive relationship. The diametric class analysis showed skewed type of distribution for carbon and tree density while diversity had reverse j-shaped curve. Among the two plant groups, cultivated species had an edge over native in storing carbon. Overall, this assessment shows the potential of using homegardens as a socio-ecological systems for sustainable development particularly in terms of land availability and climate mitigation options in the face of rapid urbanization.

Tài liệu tham khảo

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