Population structure of Rudgea parquioides (Rubiaceae), a shade-tolerant shrub species, in Southern Brazil

Anais da Academia Brasileira de Ciências

Fernanda C.g. Cardoso¹  Ana P.b. Salvalaggio¹  Márcia C.m. Marques¹ 

[1] ,Universidade Federal do Paraná Laboratório de Ecologia Vegeta Departamento de BotânicaCuritiba PR ,Brasil

关键词: allometry;    Araucaria forest;    size distribution;    subtropical forest;    understorey;    alometria;    floresta com Araucária;    distribuição de tamanho;    floresta subtropical;    sub-bosque;   

DOI  :  10.1590/S0001-37652010000300011

来源: SciELO

【 摘 要 】

The expectations that shade-tolerant forest species show 1) a population structure composed by a high amount of small individuals, and 2) biomass allocation for diameter higher than for height growth, were tested for Rudgea parquioides, a typical shrub in Southern Brazil. We described the size structure (height and stem diameter) and allometrical relations of a R. parquioides population by counting and measuring all the individuals in a 725m² area in the municipality of Curitiba (25"25'S; 49"19'W). A total of 916 individuals (12,634 ind.ha-1) were recorded in the area. The firstexpectation was supported, since distribution by height and diameter classes showed a predominance of small individuals (skewness coefficients > 1). On the other hand, the regression between height and stem base diameter showed slope β < 1, which indicates that growth in height is higher than in diameter, not supporting the second expectation. These results show that life strategies in shade-tolerant species may imply in more trade-off combinations than previously described.

【 授权许可】

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