Data/hora: 04/06/2024 18:21:52

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 01/08/1992
Data da última atualização: | 22/05/2023
Autoria: | LAUENROTH, W. K.; DODD, J. L.; SIMS, P. L.
Título: | The effects of water and nitrogen-induced stresses on plant community structure in a Semiarid grassland.
Ano de publicação: | 1978
Fonte/Imprenta: | Oecologia, v. 36, n. 2, p. 211-222, Jan. 1978.
DOI: | 10.1007/BF00349810
Idioma: | Inglês
Conteúdo: | Abstract: A replicated factorial experiment was designed to test the hypothesis that manipulating inputs of water and mineral nitrogen to a semiarid grassland would disrupt existing interactions resulting in alteration of the structure of the primary producer community. Alteration of community structure was measured as either changes in growing season average biomass of 6 functional groups of plants or their relative contribution to total biomass. Additions of water greatly increased total biomass and resulted in the replacement of one of the dominant functional groups by a subordinate group. The water plus nitrogen treatment resulted in large biomass increases in two of the dominant functional groups, elimination of succulents as an important component of community structure, and establishment of several introduced weedy species. Continuation of the experiment will likely result in complete dominance of the water plus nitrogen treatment by these introduced species. Despite the large changes in community structure observed as a result of water- and nitrogen-induced stresses we conclude that the shortgrass prairie in northcentral Colorado is asymptotically stable with respect to these influences.
Thesagro: | Água; Ecologia; Nitrogênio; Pastagem Nativa.
Thesaurus Nal: | Grasslands; Nitrogen; Plant communities; Plant ecology; Semiarid soils.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (8056-1) - ADD - AP - DD -  -  -  - DIS