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Modelling critical patches of connectivity for invasive Maling bamboo (Yushania maling) in Darjeeling Himalayas using graph theoretic approach

Author

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  • Roy, Arijit
  • Bhattacharya, Sudeepto
  • Ramprakash, M.
  • Senthil Kumar, A.

Abstract

Graph theoretic network approach has been used to model the potential connectivity of the natural areas in Darjeeling Himalayas which provide connectivity to the invasive species Maling bamboo (Yushania maling). Centrality indices are a tool for quantifying the intuitive notion of relative importance of the elements of a graph. The probability of connectivity (PC) index which takes into account the impact of functional connectivity among the patches like seed dispersal potential was used to identify the natural patches which can act as stepping stone for the spread of the invasive species. The potential niche map of Maling bamboo modelled using species niche model, MaxEnt have been used as the potential areas of its spread from the regions of its current infestations. An open source software (Confer) has been used to model the various graph indices in the spatial domain. Using areas weighted nodes (forest patches) the extent of connectivity among the various patches in the Darjeeling Himalayas have been computed to identify the critical patches responsible for the spread of Maling bamboo. It has been observed that 3 critical forest patches in the Darjeeling Himalaya Singalilla NP in the west, Senchal WLS in the central region and Neora Valley NP are the key vertices for the spread of Maling bamboo.

Suggested Citation

  • Roy, Arijit & Bhattacharya, Sudeepto & Ramprakash, M. & Senthil Kumar, A., 2016. "Modelling critical patches of connectivity for invasive Maling bamboo (Yushania maling) in Darjeeling Himalayas using graph theoretic approach," Ecological Modelling, Elsevier, vol. 329(C), pages 77-85.
    • Handle: RePEc:eee:ecomod:v:329:y:2016:i:c:p:77-85
    DOI: 10.1016/j.ecolmodel.2016.02.016
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    References listed on IDEAS

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    1. Bodin, Örjan & Saura, Santiago, 2010. "Ranking individual habitat patches as connectivity providers: Integrating network analysis and patch removal experiments," Ecological Modelling, Elsevier, vol. 221(19), pages 2393-2405.
    2. Léo Berline & Anna-Maria Rammou & Andrea Doglioli & Anne Molcard & Anne Petrenko, 2014. "A Connectivity-Based Eco-Regionalization Method of the Mediterranean Sea," PLOS ONE, Public Library of Science, vol. 9(11), pages 1-9, November.
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    Cited by:

    1. Upadhyay, Shashankaditya & Roy, Arijit & Ramprakash, M. & Idiculla, Jobin & Kumar, A. Senthil & Bhattacharya, Sudeepto, 2017. "A network theoretic study of ecological connectivity in Western Himalayas," Ecological Modelling, Elsevier, vol. 359(C), pages 246-257.
    2. Srivastava, Vivek & Griess, Verena C. & Padalia, Hitendra, 2018. "Mapping invasion potential using ensemble modelling. A case study on Yushania maling in the Darjeeling Himalayas," Ecological Modelling, Elsevier, vol. 385(C), pages 35-44.

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