publication . Doctoral thesis . 2009

Borneo: a quantitative analysis of botanical richness, endemicity and floristic regions based on herbarium records

Raes, Niels;
Open Access English
  • Published: 11 Feb 2009
  • Publisher: National Herbarium of the Netherlands (NHN), Leiden University Branch
  • Country: Netherlands
Abstract
Based on the digitized herbarium records housed at the National Herbarium of the Netherlands I developed high spatial resolution patterns of Borneo's botanical richness, endemicity, and the floristic regions. The patterns are derived from species distribution models which predict a species occurrence based on the identified relationships between species recorded presences and the ecological circumstances at those localities. A new statistical method was developed to test the species distribution models. Several areas of high richness and endemicity were added to the list of previous known ones. Furthermore, the lowland rain forest of Borneo, previously recognize...
Subjects
Medical Subject Headings: parasitic diseases
free text keywords: Biodiversity, Biogeography, Borneo, Endemicity, Floristic region, Niche model, Null model, Phytogeography, Species distribution model
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Doctoral thesis . 2009
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Most frequently we used the Landsat 7 images, Our results showed that for low prevalence values very high AUC values can be expected from randomly drawn points (Fig. 3.1; Table S3.1). Olden et al. (2002) too reported such high accuracy values for low (and high) prevalence.

The 95% C.I. AUC value of the bias corrected null-model for 15 records (prevalence = 1.48%) was as high as 0.9622 (Fig. 3.1; Table S3.1).

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