Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1007/s10531-010-9785-1
Title (Primary) Reassessing Neotropical angiosperm distribution patterns based on monographic data: a geometric interpolation approach
Author Raedig, C.; Dormann, C.F.; Hildebrandt, A.; Lautenbach, S.
Source Titel Biodiversity and Conservation
Year 2010
Department CLE; CHS
Volume 19
Issue 6
Page From 1523
Page To 1546
Language englisch
Keywords Angiosperm distribution patterns; Broad-scale ecology; Conservation biogeography; Interpolation; Leave-one-out-cross-validation; Monographic data; Narrow endemic species; Neotropics; Sampling effort; Species geographic ranges
Abstract Monographic data rely on specimens deposited in herbaria and museums, which have been thoroughly revised by experts. However, monographic data have been rarely used to map species richness at large scale, mainly because of the difficulties caused by spatially heterogeneous sampling effort. In this paper we estimate patterns of species richness and narrow endemism, based on monographic data of 4,055 Neotropical angiosperm species. We propose a geometric interpolation method to derive species ranges at a 1° grid resolution. To this we apply an inverse distance-weighted summation scheme to derive maps of species richness and endemism. In the latter we also adjust for heterogeneous sampling effort. Finally, we test the robustness of the interpolated species ranges and derived species richness by applying the same method but using a leave-one-out-cross-validation (LOOCV). The derived map shows four distinct regions of elevated species richness: (1) Central America, (2) the Northern Andes, (3) Amazonia and (4) the Brazilian Atlantic coast ('Mata Atlântica'). The region with the highest estimated species richness is Amazonia, with Central America following closely behind. Centers of narrow endemism are located over the entire Neotropics, several of them coinciding with regions of elevated species richness. Sampling effort has a minor influence on the interpolation of overall species richness, but it substantially influences the estimation of regions of narrow endemism. Thus, in order to improve maps of narrow endemism and resulting conservation efforts, more collection and identification activity is required.
Persistent UFZ Identifier
Raedig, C., Dormann, C.F., Hildebrandt, A., Lautenbach, S. (2010):
Reassessing Neotropical angiosperm distribution patterns based on monographic data: a geometric interpolation approach
Biodivers. Conserv. 19 (6), 1523 - 1546 10.1007/s10531-010-9785-1