Local spatial variation in the population dynamics of two tree species in a region of Atlantic Rainforest, SE Brazil

Autor(es)

Rosa, Lucas Benedito Gonsales ^[1] ; Sampaio, Mauricio Bonesso ^[2] ; Martins, Valeria Forni ^{[3, 4]}

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Programa Posgrad Agr & Ambiente, UFSCar Campus Araras, Rodovia Anhanguera SP 330, BR-13600970 Araras, SP - Brazil

^[2] Prefeitura Municipio Maringa, Secretaria Meio Ambiente & Bem Estar Anim, Ave 15 Novembro, 701, BR-87013230 Maringa, PR - Brazil

^[3] Univ Fed Sao Carlos, Dept Ciencias Nat, Ctr Ciencias Agr Matemat & Educ, UFSCar Campus Araras, Rodovia Anhanguera SP 330, BR-13600970 Araras, SP - Brazil

^[4] Univ Campinas UNICAMP, Dept Biol Vegetal, Inst Biol, POB 6109, BR-13083970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Rev. bras. Bot.; v. 42, n. 4, p. 671-680, DEC 2019.
• Citações Web of Science: 0

Resumo

The population dynamics of species with distinct geographic distribution ranges and local abundances can be differently influenced by environmental differences at both the regional and local scales. Here, we test for local spatial variation in the dynamics of different populations of two tree species with these distinct characteristics. We took advantage of one population census and carried out a new census of two populations of Faramea picinguabae M.Gomes (Rubiaceae) and Mollinedia schottiana (Spreng.) Perkins (Monimiaceae) at two non-contiguous, permanent 1-ha plots (B and E) located at a region of Atlantic Rainforest, SE Brazil. The plots differed in declivity and soil coverage by rocky boulders. The annual population growth rate (lambda) differed only for F. picinguabae (lambda(B) = 1.009, lambda(E) = 0.959), which presents restricted geographic distribution range and low local abundance in relation to M. schottiana (lambda(B) = 0.982, lambda(E) = 0.987). The decline in three out of four populations may result from a severe drought in SE Brazil in the last decade. The increase in F. picinguabae at plot B is likely a response to the lower soil coverage by rocky boulders at this plot. Even though we evaluated only two populations of two species, our conclusions open a new venue for the investigation of population dynamics. Within the same forest, some species might show spatial variation in population dynamics mediated by environmental differences at the local scale, while others might not. In the long term, differences among species are likely to result in important changes in community structure and dynamics, as well as in ecosystem functions. (AU)

• Processo FAPESP: 03/12595-7 - Composição florística, estrutura e funcionamento da Floresta Ombrófila Densa dos Núcleos Picinguaba e Santa Virgínia do Parque Estadual da Serra do Mar, estado de São Paulo, Brasil
• Beneficiário: Carlos Alfredo Joly
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático