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Tree Structure and Diversity in Human-Impacted Littoral Forests, Madagascar

Author

Listed:
  • J. Carter Ingram

    (University of Oxford, Biodiversity Research GroupSchool of Geography and the Environment)

  • Robert J. Whittaker

    (University of Oxford, Biodiversity Research GroupSchool of Geography and the Environment)

  • Terence P. Dawson

    (University of Oxford, Biodiversity Research GroupSchool of Geography and the Environment)

Abstract

This research surveyed human-impacted littoral forests in southeastern Madagascar to determine (i) how forest structural features, indicative of human impact, are related to total, utilitarian, and endemic tree diversity; (ii) the distribution, abundance, and demographics of tree species groups (i.e., total, useful, endemic) across the landscape; and (iii) the amount of basal area available per human use category. We also use these data to consider issues of sustainable use and how human impact may influence littoral forest tree community composition across the landscape. Within 22 transects of 400 m2 each, we recorded a total of 135 tree species and 2155 individuals. Seventy-nine species (58%) were utilitarian and 56 (42%) were nonutilitarian species. Of the 2155 individuals, 1827 (84%) trees were utilitarian species. We recorded 23 endemic species (17% of the total species) and 17 (74%) of these were utilitarian species. Basal area was significantly correlated with Shannon Weiner Index values for total (r = 0.64, P

Suggested Citation

  • J. Carter Ingram & Robert J. Whittaker & Terence P. Dawson, 2005. "Tree Structure and Diversity in Human-Impacted Littoral Forests, Madagascar," Environmental Management, Springer, vol. 35(6), pages 779-798, June.
    • Handle: RePEc:spr:envman:v:35:y:2005:i:6:d:10.1007_s00267-004-0079-9
    DOI: 10.1007/s00267-004-0079-9
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