caa a22 4500 475751027 CHVBK 20180406123523.0 cr unu---uuuuu 170329e20000801xx s 000 0 eng 10.1023/A:1026500710274 doi (NATIONALLICENCE)springer-10.1023/A:1026500710274 Kessler Michael Albrecht-von-Haller-Institut für Pflanzenwissenschaften, Abteilung Systematische Botanik, Untere Karspüle 2, D-37073, Göttingen, Germany aut Elevational gradients in species richness and endemism of selected plant groups in the central Bolivian Andes [Elektronische Daten] [Michael Kessler] I analyzed the distribution of Acanthaceae, Araceae, Bromeliaceae, Cactaceae, Melastomataceae, and Pteridophyta in 62 vegetation plots of 400m2 along an elevational transect between 500m and 2450m, and at a nearby lowland site in western Santa Cruz department, Bolivia. These groups were selected because they are physiognomically distinctive, have high species numbers, are comparatively easy to identify, adequately reflect overall floristic relationships, include a wide range of life forms, and are small. The transect was located in the Tucumano-Boliviano biogeographic zone and included drought-deciduous (<850-1000m), mixed evergreen (850-1000 m to 1800m), and evergreen Podocarpus-dominated (>1800m) forests. Elevational patterns of species richness were group-specific and probably related to the ecophysiological properties of each group. Species richness in Pteridophyta and Melastomataceae was correlated with moss cover (i.e., humidity), with elevation (i.e., temperatures) in Acanthaceae and epiphytic Bromeliaceae, with potential evapotranspiration (i.e., ecosystem productivity) in Araceae, and with light availability at ground level in terrestrial Bromeliaceae and Cactaceae. Community endemism generally increased with elevation, but showed a maximum at 1700m for terrestrial Pteridophyta, and a nonsignificant decline for epiphytic Bromeliaceae and Cactaceae. Endemism was higher for terrestrial than for epiphytic taxa, and was lower among Pteridophyta compared to all other groups, reflecting different dispersal ability among taxonomic and ecological groups. Elevational zonation, tested against a null-model of random distribution of elevational limits, revealed a significant accumulation of upper and lower elevational range boundaries at 900-1050m and at 1500-1850m, corresponding to the elevational limits of the main physiognomic vegetation types. Kluwer Academic Publishers, 2000 Diversity nationallicence Endemism nationallicence Tucumano-Boliviano zone nationallicence Plant Ecology Kluwer Academic Publishers 149/2(2000-08-01), 181-193 1385-0237 149:2<181 2000 149 11258 https://doi.org/10.1023/A:1026500710274 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1026500710274 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Kessler Michael Albrecht-von-Haller-Institut für Pflanzenwissenschaften, Abteilung Systematische Botanik, Untere Karspüle 2, D-37073, Göttingen, Germany aut NATIONALLICENCE 773 0- Plant Ecology Kluwer Academic Publishers 149/2(2000-08-01), 181-193 1385-0237 149:2<181 2000 149 11258 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer