Vol17 No.5: 1045-1057
【Title】How do altitude and soil properties influence the taxonomic and phylogenetic structure and diversity of Brazilian páramo vegetation?
【Author】Markus GASTAUER1,2*, Jan THIELE3, Stefan POREMBSKI4, Andreza Viana NERI5*
【Addresses】1 Instituto Tecnológico Vale, R. Boaventura da Silva, 955, CEP 66055-090, Bairro Nazaré, Belém, PA, Brazil; 2 Universidade Federal do Pará, Programa de pós-graduação em Ecologia, Rua Augusto Corrêa, 01, CEP 66075-110, Guamá, Belém, Brazil; 3 Thünen Institute, Institute of Biodiversity, Bundesallee 65, 38116 Braunschweig, Germany; 4 University of Rostock, Institute of Bioscience, Department of Botany and Botanical Garden, Wismarsche Str. 44/45, D-18051 Rostock, Germany; 5 Universidade Federal de Viçosa, Department of Plant Biology, Laboratory of Ecology and Evolution of Plants, Campus Universitário s/n, 36570-900, Viçosa, Minas Gerais, Brazil
【Corresponding author】Markus GASTAUER; Andreza Viana NERI
【Citation】Gastauer M, Thiele J, Porembski S, et al. (2020) How do altitude and soil properties influence the taxonomic and phylogenetic structure and diversity of Brazilian páramo vegetation?. Journal of Mountain Science 17(5). https://doi.org/10.1007/s11629-019-5403-1
【Abstract】Altitude and environmental variables such as edaphic properties are considered determinants of species distribution and community composition in mountain ecosystems. Here, we aimed to outline the effects of distinct mountain peaks, altitude and soil properties on community composition, species density, phylogenetic structure and diversity of angiosperm páramo communities from the Serra do Brigadeiro State Park, Minas Gerais, southeastern Brazil. For that, we identified all angiosperm species found in 300 plots (1 m × 1 m) from three mountain peaks, measured soil depth and analyzed soil fertility and texture in each plot. To reduce the number of soil variables and species composition, we computed principal coordinates based on soil properties and principal coordinates based on species-plot matrix for each plot. Furthermore, we computed the standard effect sizes of the mean phylogenetic pairwise distance and the mean nearest phylogenetic taxon distance for each plot to investigate differences in the degree of relatedness among coexisting species. We compared differences in response variables between peaks and modelled them in function of altitude and principle components of soil properties using mixed effect models. Species density and phylogenetic diversity differed between peaks, but, contrary to the previous findings, no relationships between species richness or phylogenetic diversity and altitude or soil properties were found, indicating that further investigations are necessary to understand the altitude-biodiversity relationship in Brazilian páramo vegetation. Community composition differed between peaks and depended on altitude, soil properties and interactions between them, indicating that upward shifting of bioclimatic conditions due to climate changes may alter communities of this ecosystem. Phylogenetic structure differed between peaks and was influenced by altitude and soil properties. As phylogenetic clustering increased with altitude, eventual upward movements of species in Brazilian páramo vegetation due to climate change may alter community composition and the degree of relatedness among coexisting species, increasing the risk of species from higher altitudes to disappear. Therefore, conservation priorities arise for higher landscape portions, where these high altitude species may find refuges.
【Keywords】Mountainous ecosystems; Altitude-biodiversity relationship; High altitude grasslands; Phylogenetic diversity; Community assemblage; Conservation