Unravelling tree diversity patterns and responses to environmental gradients in a tropical forest landscape of the Western GhatsOA
Understanding spatial patterns of plant species diversity and the factors(e.g.,climate and human)that drive these patterns is essential for biodiversity conservation.We used data from 1700.1-ha forest plots in the Shettihalli tropical forest landscape of the Western Ghats biodiversity hotspot,India,to analyse tree community composition and the drivers of α-diversity(Shannon)andβ-diversity(LCBD).Compositional patterns were visualized using Non-Metric Multidimensional Scaling(NMDS),and hybrid feature selection with structural equation modeling(SEM)was employed to evaluate the direct and indirect effects of environmental variables on diversity.NMDS identified four distinct forest types in the Shettihalli landscape:semi-evergreen,dry deciduous,moist deciduous,and plantation forests,each with distinct plant composition.Shannon diversity and ecological uniqueness was significantly higher in semi-evergreen forest than in deciduous forest plots.The SEMs explained about 79%and 39–45%of the variation in α-diversity andβ-diversity.Our analysis indicated that current diversity patterns result from multiple processes,with structure,disturbance,and edaphic parameters exerting the strongest direct and indirect effects onα-diversity.β-diversity,in contrast,was largely influenced by climate,topography,stand structure,and edaphic factors.Overall,our findings indicate that various factors(e.g.,climate,topography,and human disturbance)interact to shape tree diversity patterns in tropical forests.These findings will help develop unique conservation and management strategies for distinct forest types in tropical forest ecosystems.
Naveen Babu Kanda;Ashaq Ahmad Dar;Kurian Ayushi;Ayyappan Narayanan;Narayanaswamy Parthasarathy
Department of Ecology and Environmental Sciences,School of Life Sciences,Pondicherry University,Puducherry 605014,India Department of Ecology,French Institute of Pondicherry,11 Saint Louis Street,Puducherry 605001,India National Biobank of Thailand,National Science and Technology Development Agency,Pathum Thani 12120,ThailandDepartment of Ecology and Environmental Sciences,School of Life Sciences,Pondicherry University,Puducherry 605014,India Division of Natural Resource Management,Faculty of Forestry,Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir,Benhama Ganderbal,J&K 191201,IndiaDepartment of Ecology,French Institute of Pondicherry,11 Saint Louis Street,Puducherry 605001,India Department of Agriculture,Ecotrophology,and Landscape Development,National and International Nature Conservation,Anhalt University of Applied Sciences,06406 Bernburg,GermanyDepartment of Ecology,French Institute of Pondicherry,11 Saint Louis Street,Puducherry 605001,IndiaDepartment of Ecology and Environmental Sciences,School of Life Sciences,Pondicherry University,Puducherry 605014,India
农业科技
Alpha diversityBeta diversityMachine learningStructural equation modelingVegetation patternsWestern Ghats
《Plant Diversity》 2026 (1)
P.92-106,15
supported by the Department of Biotechnology,Ministry of Science and Technology,Govt.India,under grant No.BT/Coord.II/10/02/2016/22.03.2018the Indian Council of Social Science Research,New Delhi,India,for providing a short-term doctoral fellowship(RFD/Short-Term/2022-23/ENV/ST/66).
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