Data/hora: 22/06/2024 02:21:51

Biblioteca(s): | Embrapa Amazônia Oriental.
Data corrente: | 07/03/2009
Data da última atualização: | 22/11/2022
Autoria: | VASCONCELOS, S. S.; ZARIN, D. J.; ARAÚJO, M. M.; RANGEL-VASCONCELOS, L. G. T.; CARVALHO, C. J. R. de; STAUDHAMMER, C. L.; OLIVEIRA, F. de A.
Afiliação: | STEEL SILVA VASCONCELOS, CPATU; Daniel Jacob Zarin, Universidade da Flórida; Maristela Machado Araújo, Universidade Federal de Santa Maria; Livia Gabrig Turbay Rangel-Vasconcelos, UFRA; CLAUDIO JOSE REIS DE CARVALHO, CPATU; Christina Lynn Staudhammer, Universidade da Flórida; Francisco de Assis Oliveira, UFRA.
Título: | Effects of seasonality, litter removal and dry-season irrigation on litterfall quantity and quality in eastern Amazonian forest regrowth, Brazil.
Ano de publicação: | 2008
Fonte/Imprenta: | Journal of Tropical Ecology, v. 24, p. 27-38, 2008.
DOI: | 10.1017/S0266467407004580.
Idioma: | Inglês
Conteúdo: | Litterfall quantity and quality may respond to alterations in resource availability expected with ongoing land-use and climate changes. Here, we quantify the effects of altered resource availability on non-woody litterfall quantity and quality (nitrogen and phosphorus concentrations) in easternAmazonian forest regrowth (Brazil) through twomulti-year experimentalmanipulations: (1) daily irrigation (5mmd?1) during the dry season; and (2) fortnightly litter removal. Consistentwith other tropical forest data litterfall exhibited seasonal patterns, increasingwith the onset of the dry season and declining with the onset of the rainy season. Irrigation did not affect litterfall mass and had little impact on nitrogen (N) or phosphorus (P) concentrations and return, except for decreasing litter P concentration at the end of two irrigation periods. Litter removal did not alter litterfall mass or P concentration, but progressively reduced litterfall N during the course of the experiment. Overall, these results suggest signi?cant resistance to altered resource availabilitywithin the bounds of our experimental treatments; our ?ndingsmay help to constrain carbon and nutrient cycling predictions for tropical forests in response to land-use and climate changes
Palavras-Chave: | Brasil.
Thesagro: | Floresta Secundaria; Irrigação.
Thesaurus Nal: | Amazonia.
Categoria do assunto: | --
Registro original: | Embrapa Amazônia Oriental (CPATU)
Exemplares: | CPATU - (40657-1) - UPC - AP - DD -  -  -  - DIS