Long-lasting effects of unplanned logging on the seed rain of mixed conifer-hardwood forests in southern South America

作     者：Alexandre F.Souza Angela Luciana deÁvila Maristela M.Araújo Solon Jonas Longhi Alexandre F.Souza;Angela Luciana deávila;Maristela M.Araújo;Solon Jonas Longhi

作者机构：Departament of EcologyCBRio Grande Do Norte Federal UniversityCentral CampusLagoa NovaNatal 59072-970RNBrazil Forest Growth DepartmentFreiburg Im BreisgauBaden-Vurtemberga Forest Research InstituteWonnhaldestraße 4Freiburg im Breisgau 79104Germany Forest Engineering Postgraduate ProgramForestry DepartmentSanta Maria Federal UniversityRoraima Av.s/nCamobiSanta Maria 97105-900RSBrazil 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2021年第32卷第4期

页      面：1409-1418页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 

基　　金：supported by the Brazilian National Council of Technological and Scientific Development(CNPq)through the"ProjetoEcológico de Longa Duração Conservação e Manejo Sustentávelde Ecossistemas Florestais—Bioma Araucária e suas Transições "(1999–2009)and through a Master degree scholarship to Angela Luciana de Avila 

主　　题：Arrested succession Brazil Logging Long-lived pioneers Seed rain 

摘      要：Understanding the effects of disturbance on seed rain is critical to predict changes in forest species composition and *** effects on seed rain in a mixed conifer-hardwood forest complex in southern Brazil were *** year of seed rain data were collected from a large-scale observational experiment in logged and protected forests and quantity and average seed size weighted by species abundance(CWM)were compared between old-growth and logged stands 55 years after logging *** these data,variations in frequency of functional groups of species in the seed rain were examined to see if they could be attributed to *** show that the number of seeds per trap was highly right-skewed,ranging from 13 to 12,788 seeds per trap in one *** rain was affected by logging history,with seed traps in old-growth plots receiving significantly less seeds than traps in logged *** species included mean seed size weighted by species abundance were significantly smaller in logged than in old-growth *** difference persisted after the exclusion of Arawcaria a large-seeded pioneer which was intensively logged,although the difference of seed size between the two forest classes was greatly *** abundance in the seed rain differed significantly from the established tree community,between logged and oldgrowth *** composition of the seed rain was much more variable than the composition of the established tree community and its points more scattered over the ordination space than the points corresponding to the protected *** number of collected seeds across different functional groups of species significantly differed between logged and old-growth *** seed rain of logged forests reflects their arrested succes sion as indicated by reduced abundance of functional groups such as pioneers,large seeded pioneers and A raucaria,as well as reduced functional diversity.S eed rain differences between logged and old-