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Abiotic drivers shape seed inputs and outputs in a tropical wetland on Croton trinitatis population

Ecological Processes 2022年第1期11卷 65-77页

作者： Francielli Bao arnildo pott Pedro Manuel Villa Centro de Avaliação da Biodiversidade Pesquisa e Conservação do Cerrado(CBC)Instituto Chico Mendes de Conservação da Biodiversidade(ICMBio)BrasíliaDF 70670-350Brazil Programa de Pós-Graduação em Biologia Vegetal Instituto de BiociênciasUniversidade Federal de Mato Grosso do SulCampo GrandeMS 79070-900Brazil Programa de Pós-Graduacão em Botânica Departamento de Biologia VegetalUniversidade Federal de ViçosaViçosaMG 36570-900Brazil Fundación para la Conservación de la Biodiversidad Mérida 7101Venezuela

Background:Predicting how natural and anthropogenic drivers shape different ecological indicators,such as plant populations along environmental gradients,can be a relevant tool for establishing management and conservation criteria of tropical *** aimed to assess the effects of seasonal flood disturbance,type of grasslands and topographical conditions on Croton trinitatis population distribution in a tropical ***:The study was carried out in a seasonally flooded grassland(Central-West Brazil).We conducted samplings of soil on the dry and flood hydrophases of the *** took the samples in eight seasonal ponds,with 1 km interval between *** were marked during the flood period,observing the water level,one in the lowest zone,in the middle of the pond=low(ca.60 cm deep),one at the pond edge=mid(ca.30 cm deep)and one in the higher zone,on the external part=high(ca.1 cm deep).Results:The results showed that the topography,seasonality,and types of grassland determine differences in the abundance patterns of adult plants and seedlings,and seed bank and seed *** abiotic factors can shape plant population-related ecological processes and patterns,with outputs(germination and predation)and inputs(local dispersion and from neighbouring areas)of proportional seeds for the population maintenance in this ***:We emphasize the importance of these findings,to show that abiotic factors are not the only ones to be considered in ecological studies of distribution and structuring of populations in habitats with extreme seasonal events.

关键词： Environmental filter Flood disturbance Pantanal Population ecology Seasonal change Seed predation Seedling Soil seed bank

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Differences between species in seed bank and vegetation helps to hold functional diversity in a floodable Neotropical savanna

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Journal of Plant Ecology 2021年第4期14卷 605-615页

作者： Evaldo Bde Souza Francielli Bao Geraldo A.Damasceno Junior arnildo pott Programa de Pos-graduacao em Ecologia e Conservacao Instituto de BiocienciasUniversidade Federal de Mato Grosso do SulCampo GrandeBrazil Programa de Pos-graduacao em Biologia Vegetal Instituto de BiocienciasUniversidade Estadual PaulistaRio ClaroSPBrazil Programa de Pos-graduacao em Biologia Vegetal Instituto de BiociênciasUniversidade Federal de Mato Grosso do SulCampo GrandeBrazil

Aims Our objective was to quantify the contributions of the seed bank and the established vegetation to the species composition,functional composition and diversity,and discuss the implications of these differences in regeneration and persistence of floodplain plant *** We sampled all ground cover vegetation up to 1.5 m height and seed bank in 25 plots(10 m×1 m)distributed across five sites in dry and rainy seasons in a periodically flooded savanna in the Pantanal wetland,*** evaluated the soil seed bank by seedling emergence *** Findings The seed bank species had traits that conferred regeneration to the communities,while persistence traits characterized the *** seed bank had higher functional richness and lower functional evenness than the *** existence of different plant traits between seed bank and vegetation allowed the coexistence of species with functionally contrasting persistence and regeneration traits,which may help maintain functional *** may allow the community to be more resilient when dealing with different environmental filters such as drought,fire and flood.

关键词： environmental filters functional diversity hydrochoric dispersal Pantanal wetland persistence regeneration

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