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Effects of environmental conditions and space on species turnover for three plant functional groups in Brazilian savannas

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Journal of Plant Ecology 2019年第6期12卷 1047-1058页

作者： Hélio Menegat Divino Vicente Silvério Henrique A.Mews Guarino R.Colli Ana Clara Abadia Leonardo Maracahipes-Santos Lorrayne A.Gonçalves Jhany Martins Eddie Lenza Universidade do Estado de Mato Grosso Campus Universitário de Nova XavantinaRua Prof.Dr.Renato Figueiro VarellaCaixa Postal0878690-000Nova XavantinaMTBrazil Instituto de Pesquisa Ambiental da Amazônia Rua Horizontina 10478640-000CanaranaMTBrazil Centro de Ciências Biológicas e da Natureza Universidade Federal do AcreCaixa Postal 50069920-900Rio BrancoACBrazil Departamento de Zoologia Universidade de Brasília70910-900BrasíliaDFBrazil

Aims Different plant functional groups display diverging responses to the same environmental ***,we assess the effects of environmental and spatial predictors on species turnover of three functional groups of Brazilian savannas(Cerrado)plants—trees,palms and lianas—across the transition zone between the Cerrado and Amazon biomes in central *** We used edaphic,climatic and plant composition data from nine one-hectare plots to assess the effects of the environment and space on species turnover using a Redundancy Analysis and Generalized Dissimilarity Modeling(GDM),associated with variance *** Findings We recorded 167 tree species,5 palms and 4 liana *** variation was most important in explaining species turnover,relative to geographic distance,but the best predictors differed between functional groups:geographic distance and silt for lianas;silt for palms;geographic distance,temperature and elevation for *** distances alone exerted little influence over species turnover for the three functional *** pure environmental variation explained most of the liana and palm turnover,while tree turnover was largely explained by the shared spatial and environmental *** effects of geographic distance upon species turnover leveled off at about 300 km for trees,and 200 km for lianas,whereas they were unimportant for palm species *** results indicate that environmental factors that determine floristic composition and species turnover differ substantially between plant functional groups in ***,we recommend that studies that aim to investigate the role of environmental conditions in determining plant species turnover should examine plant functional groups separately.

关键词： environmental gradient spatial gradient neotropical savannas ecological tension zone life forms ecological groups

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