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Tree succession across a seasonally dry tropical forest and forest-savanna ecotone in northern Minas Gerais,Brazil

Journal of Plant Ecology 2017年第5期10卷 859-868页

作者： polyanne a.coelho Paola Ferreira Santos Eduardo de Paiva Paula Deborah M.G.Apgaua Bruno Gini Madeira Gisele Cristina de Oliveira Menino Yule Roberta Ferreira Nunes Rubens M.Santos David Y.P.Tng Department of Forest Sciences Federal University of LavrasC.P.3037CEP 37200-000LavrasMinas GeraisBrazil Department of General Biology State University of Montes ClarosC.P.126CEP 39401-089Montes ClarosMinas GeraisBrazil Instituto Federal Goiano C.P.66CEP 75901-970Rio VerdeGoiâniaBrazil Centre for Tropical Environmental and Sustainability Sciences College of Marine and Environmental SciencesJames Cook University14-88 McGregor RdSmithfield QLD 4878CairnsQueenslandAustralia

Aims Understanding succession in tropical forest is an important aspect of vegetation science,but to date,successional processes in sea-sonally dry tropical forests(SDtFs)have received much less atten-tion than evergreen humid tropical *** aim to fill this knowledge *** We investigated vegetation succession in SDtF areas consisting of three different successional stages(early,intermediate,late),and a SDtF-savanna ecotone in the municipal district of Juramento,north of Minas Gerais State,*** twelve 400 m2 plots in each area,we compared vegetation parameters and structural variables(absolute density and basal area)and examined the floristic composition of the tree component to find gradients of *** Findings We found evidence of species turnover along a successional gradi-ent,with the intermediate stage showing the highest species rich-ness and *** was accompanied with a significant increase in the number of tree individuals and basal area from the early to intermediate successional ***,the intermediate and late SDtF successional stages were more similar in structure and *** ecotone was the most species rich and was similar to the intermediate SDtF and early successional stage in species richness and floristic composition *** results will have implications for guiding SDtF management and recovery programs.

关键词： caatinga floristic Similarity ecotone forest succession resilience.

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Small-scale edaphic heterogeneity as a floristic-structural complexity driver in Seasonally Dry Tropical Forests tree communities

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Journal of Forestry Research 2020年第6期31卷 2347-2357页

作者： Cle´ber Rodrigo de Souza Jean Daniel Morel Alisson Borges Miranda Santos Wilder Bento da Silva Vinı´cius Andrade Maia polyanne Aparecida.coelho Vanessa Leite Rezende Rubens Manoel dos Santos Forest Sciences Departament Federal University of LavrasCx.P.3037Lavras 37200-000Brazil Biology Department Federal University of LavrasCx.P.3037Lavras 37200-000Brazil

Our work aimed to test the hypothesis that soil microscale heterogeneity act as a community ecological driver,increasing diversity and promoting structural shifts on the Seasonally Dry Tropical Forest(SDTF)tree *** evaluated the relationship between microscale edaphic variations and floristic–structural patterns of tree communities in a SDTF fragment located in the southern end of the Brazilian Caatinga *** and soil data were obtained through 27 sample units of 400 m2(20 m 920 m),within each one we measured and identified at species level all arboreal individuals with Circumference at the Breast Height greater or equal to 10 cm,and also collected the soil *** the data we evaluated soil variation influence on the tree community structural and floristic patterns trough generalized linear *** explained the small-scale structural and floristic variations,contributing significantly to biomass,sprouting and to floristic relationships between sample *** was also observed a possible relation of the result with the Caatinga domain biogeographic history,due the presence of Sedimentary Caatinga species,which are not expected for the study *** plays an important role in driving small-scale complexity and diversity of SDTF,but we also suggest that Caatinga biogeographic events have influence on the high heterogeneity patterns.

关键词： Caatinga domain Edaphic variables Sprouting Sedimentary Caatinga

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