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| 1 | Plant diversity and community structure of Brazilian Páramos显示文摘In Eastern South America, high altitude grasslands represent a mountain system that has a high number of endemic species. However, studies on the ecology of plant communities in these environments remain scarce. We aimed to evaluate the patterns of biodiversity and structure of plant communities from rocky outcrops in high altitude grasslands of three areas at the Caparaó National Park, southeastern Brazil, by sampling 300 randomly distributed plots. Then, we compared the floristic composition, relative abundance, and biological and vegetation spectra among areas. We classified species as endemic and non-endemic and verified the occurrence of endangered species. Species richness was evaluated by rarefaction analysis on the sampling units. The importance value and species abundance distribution(SAD) models were assessed. We also performed an indicator species analysis. We sampled 58 species belonging to 49 genera and 32 families. The number of species decreased with increasing altitude, with significant differences being observed among areas regarding richness, abundance, and cover. Of the total number of species, 10 are endemic to the Caparaó National Park and 17 are listed on the Brazilian Red List of endangered species. The dominant families on all peaks were Asteraceae and Poaceae. The SAD models showed lognormal and geometric distributions, corroborating the fact that 10 species that were common to all three areas were also the most dominant ones in the communities and showed the highest importance values, which ranged between 35% and 60%. Indicator species analysis revealed that 28 species(48.27%) were indicators. Of these, 42.85% had maximum specificity, meaning that they occurred only in one area. Thus, the number of species per life form ratio was similar among areas, yet vegetation spectra differed, especially for hemicryptophytes. The altimetric difference among the areas showed to be a very important driver in the community assembly, influencing the evaluated variables, however, other drivers as soil depth, slope and water could also influence the community structure on a smaller and local spatial scale. | prímula viana campos pedro manuel villa jaquelina alves nunes carlos e.g.r.schaefer stefan porembski andreza viana neri | 2018 | Journal of Mountain Science2018，15，6： | 2 |
| 2 | Relationship between the recurrent laryngeal nerve and the inferior thyroid artery: a study in corpses 显示文摘 | Campos BA Henriques PR | 2000 | Rev Hosp Clin Fac Med Sao Paulo2000，55，6： | 1 |
| 3 | Stenosis in he- modialysis arteriovenous fistula evaluation and treatment显示文摘 | Campos PR Do Nascinento MM Chula DC | 2006 | He modial Int2006，10，2： | 1 |
| 4 | Improving the waiting list by using 75-year-old donors for recipients with hepatocellular carcinoma 显示文摘 | Cascales Campos PA Romero PR Gonzalez R | 2010 | Transplant Proc2010，42，2： | 1 |
| 5 | Brazilian propolis: correlation between chemical composition and antimicrobial activity 显示文摘 | Salomao K Pereira PR Campos LC | 2008 | Evid Based Complement Altemat Med2008，5，3： | 1 |
| 6 | Stenosis in hemodialysis arteriovenous fistula evaluation and treatment显示文摘 | Campos PR Do Nascinento MM Chula DC | 2006 | Hemodial Int2006，10，： | 1 |
| 7 | Brazilian propolis: Correlation between chemical composition and antimicrobial activity 显示文摘 | Salomao K Pereira PR Campos LC | 2008 | Evid Based Complement Alternat Med2008，5，3： | 1 |
| 8 | Altitude as environmental filtering influencing phylogenetic diversity and species richness of plants in tropical mountains显示文摘Elucidating how multiple factors affect biodiversity and plant community assembly is a central issue in ecology,especially in vulnerable ecosystems such as tropical mountains.These studies are more relevant in global warming scenarios that induce the upward displacement of plant species towards reduced habitats and hostile environments in tropical mountains.This study aimed to analyze how altitude affects taxonomic and phylogenetic diversity in plant communities of tropical mountains.Thus,we tested if(i)increased altitude works as an environmental filtering promoting decreased species richness,decreased phylogenetic diversity,and increased phylogenetic clustering in these tropical mountains;and if(ii)plant communities of high altitude in tropical mountains are also result of recent diversification with plant species recently split shortening phylogenetic distances between closest related species.We tested effects of altitude on species richness and phylogenetic metrics using linear mixed-effects models.Mount Haleakala presented 114 species,Mount Kilimanjaro presented 231 species and Mount Purace presented 280 species.We found an environmental filtering effect with increasing altitude causing phylogenetic clustering,decreased phylogenetic diversity and decreased species richness.The decreasing phylogenetic distances between closest relatives are congruent with neo-endemics,suggesting recent plant diversification in high altitudes of tropical mountains,possibly driven by geographic isolation and environmental heterogeneity.Consequences of global warming should be monitored in tropical mountains focusing on distribution shifts. | GALVÁN-CISNEROS Carlos M. VILLA Pedro M. COELHO Alex J.P. CAMPOS Prímula V. MEIRA-NETO João A.A. | 2023 | Journal of Mountain Science2023，20，2： | 0 |
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