Data/hora: 15/06/2024 07:58:45

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 25/04/1995
Data da última atualização: | 04/04/2017
Autoria: | MASUDA, M.; WASHITANI, I.
Título: | A comparative ecology of the seasonal schedules for reproduction by seeds'in a moist tall grassland community.
Ano de publicação: | 1990
Fonte/Imprenta: | Functional Ecology, v.4, n.2, p.169-182, 1990.
Idioma: | Inglês
Conteúdo: | Seasonal patterns of seedling emergence and seed dispersal as well as their spatial patterns were measured for several dozen component species of a species-rich moist tall grassland comunity in warm temperate Japan. Although extremely hjgh spatial heterogeneity of seedling emergence was observed for most of the species, which would have resulted from both the spatial heterogeneites of seed rain and safe-site distribution, the seasonal pattern of seedling emergence was less varied within a species over space and between years. Yearly seedling emergence in the community starded when the accumulated daily air temperature (on a base temperature of 5C) reached around 30 degree days (Kd) and the spring flush of emergence began when daily mean temperatures of warmer days rose above 10C. Emergence seasons in the comunity were concentrated in spring and early summer. Autumn emergence was recorded for only one species. Mean seed weight significantly and linearly dependend on the mean date of emergence of yearly recorded seedling for individual species, i.e. the greater the seed mass of the species, the later the seedling emergence season was. Upright annuals had a significantly earlier mean date of emergence than perennial and annual lianas. Since seed dispersal time varied greatly from species to species, ranging from mid-spring to early winter, there was a great variety of relative timings of seed dispersal and seedling emergence among the co-occurring species in the community.
Palavras-Chave: | Community; Comparative ecology; Comunidade; Ecologia comparativa; Grassland.
Thesagro: | Dispersão de Semente; Fenologia; Pastagem; Reprodução.
Thesaurus Nal: | phenology; reproduction; seed dispersal; seedling emergence.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (27958-1) - ADC - SP - PP - SP14252 -  - 14252 - DIS