Data/hora: 23/06/2024 13:04:42

Biblioteca(s): | Embrapa Pantanal; Embrapa Rondônia.
Data corrente: | 13/02/1997
Data da última atualização: | 13/02/1997
Autoria: | FRANKIE, G. W.; BAKER, H. G.; OPLER, P. A.
Afiliação: | Organization for Tropical Studies, South Miami, Florida, U.S.A.
Título: | Comparative phenological studies of trees in tropical wet and dry forests in the Lowlands of Costa Rica.
Ano de publicação: | 1974
Fonte/Imprenta: | Journal of Ecology, v.62, n.3, p.881-919, 1974.
Idioma: | Inglês

Conteúdo:

During 1969-70, 185 tree species at a Wet forest site and 113 species at a Dry forest site in Costa Rica were systematically observed for changes in leafing, flowering and fruiting. 
(1) At the Wet Forest site, the greatest amount of leaf fall in the overstorey and understorey trees occurred primarily during the first (more severe) dry season. At that time, 17% of the tree species from both storeys lost leaves.
(2) At the Dry forest site, the period of greatest leaf fall coincided with the long dry period; at that time 75% of the species los leaves.
(3) Most Wet forest species flushed large quantities of new leaves during the first dry season. This was in contrast to the Dry forest site where most species flushed leaves at the onset of the first rainy season.
(4) Two apparent flowering peaks in the overstorey tree species and three apparent flowering peak in the understorey tree species were recorded during the year at the Wet forest site. These major flowering periods in both layers occurred during wet as well as dry seasons, and two of the peak periods of the overstorey appeared to be out of phase with two of the understorey. The species at the Wet forest site were well represented by both 'seasonal' and 'extended' flowering species.
(5) At the Dry forewst site, two peak periods of flowering activity were recognized. One extensive period occurred during the long dry season and a second peak period was recorded at the onset of the rainy season. Most species were of a 'seasonal' rather than 'extended' flowering nature.
(6) With regard to Wet forest fruiting, substantial numbers of species (at least 37) from both storeys were in mature fruit during each month, but a peak in fruiting occurred in both layers during the second dry season (August-October); the fruiting peaks of the two storeys were separated by one month. The sisseminules of most Wet forest species were not adapted for wind dispersal.
(7) A peak period in the production of mature fruit occurred during the latter part of the long dry season at the Dry forest site. A significant proportion (31%) of the Dry forest species had disseminules adapted for wind dispersal.
(8) When phenological patterns of vicarious species of the two forests were compared, only flowering patterns showed similarity (11/27 species). Leafing and fruiting patterns of vicarious species tended to follow the general trends of the respective forest ecosystems.
(9) Periodicity patterns of most species in common between the two forest sites were similar.
(10) The phenological patterns recorded are discussed in relation to climatic 'triggers' (proximate factors) and plant-animal interactions (ultimate factors).

Palavras-Chave: | Dry forest; Estudo fenológico; Phenological study; Seca tropical; Tree; Tropical wet.
Thesagro: | Árvore; Floresta.
Thesaurus Nal: | Costa Rica; lowlands.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)

Exemplares:

CPAF-RO - (11181-1) - ADM - SP - -- - SP-3240 -  - SP-3240 - DIS
CPAP - (33813-1) - ADD - SP - -- - SP3436 -  - 3436 - DIS