Patterns of species richness and beta diversity of vascular plants along elevation gradient in Brazilian páramo

作     者：CORDEIRO Anais de Almeida Campos KLANDERUD Kari VILLA Pedro Manuel NERI Andreza Viana CORDEIRO Anais de Almeida Campos;KLANDERUD Kari;VILLA Pedro Manuel;NERI Andreza Viana

作者机构：Federal University of ViçosaDepartment of Plant BiologyLaboratory of Ecology and Evolution of PlantsCampus Viçosa36570-900Viçosa-MGBrazil Faculty of Environmental Sciences and Natural Resource ManagementNorwegian University of Life SciencesP.O.Box 5003N-1432ÅsNorway Biodiversity Conservation Association7101Puerto AyacuchoEstado AmazonasVenezuela 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2023年第20卷第7期

页      面：1911-1920页

核心收录：

学科分类：07[理学] 0713[理学-生态学] 

基　　金：financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior-Brazil(CAPES)-Finance Code 001 

主　　题：High altitude grassland Species turnover Partitioning diversity Campo de altitude Tropical mountains 

摘      要：Understanding the relationships between plant diversity and the environment is an important step towards conservation of species and *** this study,we hypothesize that community species richness decreases and species composition change along the elevation gradient,with a greater contribution of species turnover than nestedness to beta *** surveyed plant species in 300 plots(1 m×1 m)in four elevational bands(2100 m,2300m,2500 m,and 2700 m)in the CaparaóNational Park,Southeastern *** samples presented a great number of species(97 spp.,59 genera,27families),however,74%of the species were considered rare with their relative abundance being1%.Among the four bands along the gradient,we detected two distinct communities with few species in *** transition between the two communities occurred at 2500 m,and this elevation band also had the highest species richness in total.A non-metric multidimensional scaling(NMDS)showed floristic differences between the bands even though they had similar *** 89%of the plot pairs,using pairwise comparison of species composition,only half of the species that occurred in one did occur in the other *** dissimilarity among the plots and elevational band reflects a significant contribution of spatial species turnover to the species richness and beta diversity on the Caparaó*** diversity increased with spatial scale(from plot to elevational-band).The dissimilarity(βSOR=0.907)in the area was due almost exclusively to spatial species turnover(βSIM=0.879),with very low contribution of species nestedness(βSNE=0.028).Our research showed that species richness does not decrease with elevation in the study area,but the floristic composition *** clear distinction of species along the gradient show that spatial species turnover is the major diversitygenerating process in the studied area.