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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
22/05/2023 |
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Autoria: |
LAUENROTH, W. K.; DODD, J. L.; SIMS, P. L. |
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Título: |
The effects of water and nitrogen-induced stresses on plant community structure in a Semiarid grassland. |
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Ano de publicação: |
1978 |
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Fonte/Imprenta: |
Oecologia, v. 36, n. 2, p. 211-222, Jan. 1978. |
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DOI: |
10.1007/BF00349810 |
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Idioma: |
Inglês |
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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. |
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Thesagro: |
Água; Ecologia; Nitrogênio; Pastagem Nativa. |
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Thesaurus Nal: |
Grasslands; Nitrogen; Plant communities; Plant ecology; Semiarid soils. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 01964naa a2200265 a 4500
001 1521927
005 2023-05-22
008 1978 bl uuuu u00u1 u #d
024 7 $a10.1007/BF00349810$2DOI
100 1 $aLAUENROTH, W. K.
245 $aThe effects of water and nitrogen-induced stresses on plant community structure in a Semiarid grassland.$h[electronic resource]
260 $c1978
520 $aAbstract: 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.
650 $aGrasslands
650 $aNitrogen
650 $aPlant communities
650 $aPlant ecology
650 $aSemiarid soils
650 $aÁgua
650 $aEcologia
650 $aNitrogênio
650 $aPastagem Nativa
700 1 $aDODD, J. L.
700 1 $aSIMS, P. L.
773 $tOecologia$gv. 36, n. 2, p. 211-222, Jan. 1978.
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