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Optimized grid representation of plant species richness in India—Utility of an existing national database in integrated ecological analysis

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  • Poonam Tripathi
  • Mukund Dev Behera
  • Partha Sarathi Roy

Abstract

Data on the distribution of plant species at spatial (grid) scales are required as input for integrative analysis along with related climate, environment, topography and soil data. Although the world’s scientific community is increasingly generating data on plant species at various spatial grids and statistically interpolating and extrapolating the available information, data on plant diversity from the Asian continent are scant. Such data are unavailable for India, the mainland of which has part of three of the world’s 36 biodiversity hotspots. Although sufficient field sampling is always impossible and impractical, it is essential to utilize fully any available database by adjudging the sampling sufficiency at a given scale. In this work, we used an exhaustive database of the plant species of the Indian mainland that was sufficient in terms of sampling vegetation types. We transformed the data, obtained the distribution at the 1° and 2° spatial grid levels and evaluated the sampling sufficiency at acceptable threshold limits (60% to 80%). The greatest species richness values recorded in the 0.04 ha quadrant, 1° grid and 2° grid were 59, 623 and 1244, respectively.Clench model was significantly (p value 0.95). At an acceptable threshold limit of 70%, almost all the grids at the 2° level and more than 80% of the grids at the 1° level were found to be sufficiently sampled. Sampling sufficiency was observed to be highly scale-dependent as a greater number of 2° grids attained asymptotic behaviour following the species–area curve. Grid-level sampling insufficiency was attributed to lower numbers of sampling quadrats in forests with poor approachability, which coincided with the world biodiversity hotspots’, suggesting that additional sampling was required. We prescribe the use of the 1° and 2° spatial grids with sufficient sampling for any ecological analysis in conjunction with other data and thereby offer grid-level plant species richness data for the Indian mainland for the first time.

Suggested Citation

  • Poonam Tripathi & Mukund Dev Behera & Partha Sarathi Roy, 2017. "Optimized grid representation of plant species richness in India—Utility of an existing national database in integrated ecological analysis," PLOS ONE, Public Library of Science, vol. 12(3), pages 1-13, March.
    • Handle: RePEc:plo:pone00:0173774
    DOI: 10.1371/journal.pone.0173774
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    1. Dany A. Cotrina Sánchez & Elgar Barboza Castillo & Nilton B. Rojas Briceño & Manuel Oliva & Cristóbal Torres Guzman & Carlos A. Amasifuen Guerra & Subhajit Bandopadhyay, 2020. "Distribution Models of Timber Species for Forest Conservation and Restoration in the Andean-Amazonian Landscape, North of Peru," Sustainability, MDPI, vol. 12(19), pages 1-20, September.

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