Data/hora: 03/06/2024 18:13:34

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 03/04/1995
Data da última atualização: | 04/04/2017
Autoria: | BRIGGS, J. M.; GIBSON, D. J.
Título: | Effect of fire on tree spatial patterns in a tallgrass prairie landscape.
Ano de publicação: | 1992
Fonte/Imprenta: | Bulletin of the Torrey Botanical Club, v.119, n.3, p.300-307, 1992.
Idioma: | Inglês
Conteúdo: | Spatial patterns of trees invading a tallgrass prairie in NE Kansas, USA were examnined using a Geographical Information System. Without burning and with adeqaute moisture levels, the number of trees increased over a five year period by over 60% while in an area burned annualy the number of trees decreased. Under a variety of burning regimes Juniperus virgiana and Celtis occidentalis were significantly more uniform in their distribution pattern than Populus deltoides and Gleditsia triacanthos. In addition, three tree species (G. triacanthos, J virginiana and U. americana) had a significant increase in the degree of aggregation with increasing tree height, while C. occidentalis showed no relationship between aggregation and  tree height. There were significant association between adult and juvenile trees at various scales, with bird dispersed J. virginiana having a higher critical distance (39 m) than wind-dispersed G. triacanthos and U. americana. The spatial pattern of tree species appears to be affected by the means of dispersion; trees with wind-dispersed seeds had clumped distributions, whereas most trees with bird-dispersed seeds were regular to random in their dispersion patterns. The spatial pattern of trees invading tallgrass prairie is a function of the burning regime, dispersal vectors, habitat availability and reproductive mode.
Palavras-Chave: | Padrao especial; SGI; Spatial patterns; Talgrass prairie; Tree.
Thesagro: | Árvore; Gramínea; Queimada.
Thesaurus Nal: | burning.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (27879-1) - ADC - SP - PP - SP14186 -  - 14186 - DIS