Plant community on a volcano mountaintop reveals unique high-altitude vegetation in southeastern Brazil  

作　　者：Igor Musauer KESSOUS Ruy JoséValka ALVES Nílber Gonçalves da SILVA Amilcar Walter SAPORETTI JUNIOR 

机构地区：[1]Biodiversity Laboratory,Federal Institute of Education,Science and Technology of Southern Minas Gerais(IFSULDEMINAS),Av.Dirce Pereira Rosa,300-Jardim Esperança,37713-100,Poços de Caldas,MG,Brazil [2]Department of Botany,National Museum,Federal University of Rio de Janeiro,Quinta da Boa Vista s.n.,São Cristóvão,20949-040,Rio de Janeiro,RJ,Brazil [3]Gothenburg Global Biodiversity Centre,Carl Skottsbergs Gata 22B,SE 41319,Gothenburg,Sweden

出　　处：《Journal of Mountain Science》2024年第9期3018-3030,共13页山地科学学报（英文）

基　　金：IFSULDEMINAS-Campus Poços de Caldas for supporting the research.

摘　　要：Mountains exhibit a high degree of endemism and diversity,however,quantifying their biodiversity can be challenging.Similar to islands,species isolation in mountainous regions results in comparable patterns of evolution and extinction,rendering their biodiversity unique and highly susceptible to anthropogenic threats.The topographic relief in mountains plays a crucial role in creating habitat complexity,which in turn contribute to high plant diversity.Here,we investigated plant diversity in the volcano mountaintop vegetation on the Poços de Caldas Plateau,a region situated in the ecotone between the Atlantic Forest and Cerrado,characterized by natural radiation and significant anthropogenic intervention.We employed an automated approach through the filtering of georeferenced and non-georeferenced data to obtain a list of plant species in the region.Additionally,we statistically investigated the similarity among different high-altitude vegetations belonging to the campos de altitude from the Atlantic Forest and campos rupestres from the Cerrado.The plateau exhibits high plant diversity,including 1,659 specific and infraspecific taxa,especially belonging to Asteraceae and Poaceae.Our analyses suggest that geographical distance is a strong predictor of dissimilarity and that the Poços de Caldas Plateau is more floristically related to the campos rupestres,despite being associated with campos de altitude.The region possesses a unique set of biodiversity,indicating that it may be a distinct formation.Additionally,we hypothesize that Pleistocene events likely influenced the conformation of the current floristic composition in the region through species interchange between the Cerrado and Atlantic Forest.Our study also highlights the few taxa assessed for conservation status and anthropogenic threats that this habitat is facing.

关 键 词：Atlantic Forest BIOGEOGRAPHY CERRADO Community ecology GRASSLAND 

分 类 号：Q948[生物学—植物学]