Data/hora: 08/06/2024 06:20:33

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 21/05/1996
Data da última atualização: | 21/05/1996
Autoria: | PHILLIPS, J. F.
Título: | Fire: its influence on biotic communities and physical factors in South and East Africa.
Ano de publicação: | 1930
Fonte/Imprenta: | South African Journal of Science, v.27, p.352-367, Nov.1930.
Idioma: | Inglês
Conteúdo: | In South and East Africa the influences of the age-old practice of firing vegetation are of the first biological and economic importance. Despite the popular interest exhibited in the effects of burning vegetation, our scientific information requires augmenting considerably. An attempt is made to ouline the more important, more easily discernible changes in the vegetation following firing, in (i) Climax Grassland, (ii) Tree-and-Grass Savanna developing to either Deciduous or Evergreen Scrub Climaxes, (iii) Macchia or "Fijnbosch," (iv) Sub- tropical and Tropical Evergreen Forest. That vast stretches of Southern and Eastern Afri- ca have their vegetation kept in an "open" or non-climax condition, by annual and perio- dic fires seems plain from the evidence upon the ground. It is held that fire in the Tree-and Grass Savannas has played no little part in the development of certain growth-forms in plants. Firing in the Savanna regions profoundly affects the behaviour of the animals asso- ciated with the vegetation. From the relatively small amount of intensive work that has be- en accomplished, no matter what portion of the world is considered, it seems that firing, according to climate, soil and vegetational conditions obtaining within a region, brings about changes of far-reaching consequences in the physical, chemical and biological conditions in soils. Suggestions regarding probable fruitful lines for future research include quadrat and experimental studies in various climatic, soil and vegetational types, investiga- tion of certain fundamentally important soil characteristics, collection of data upon "fire" plant-indicators, and application of all information won to practical problems in vegetation management.In reviewing the state of our knowledge as to the influences of firing, it is held that neither those who consider firing as having no evil effects nor yet those who state it to have no merits are correct. Controlled firing is a useful and oftentimes necessary agent in veld management and in Tsetse-fly control. It is urged that generalisations regar- ding the influences of firing should be made only after the local circumstances have been examined.
Palavras-Chave: | Biotic communities; Comunidade biotica; Fator fisico; Fire; Influences; Influencia; Physical factors; South and East Africa.
Thesagro: | Fogo.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (31911-1) - ADC - SP - -- - SP2393 -  - 2393 - DIS