Title:	Benthic macroinvertebrates and degradation of phytomass as indicators of ecosystem functions in flooded rice cropping.
Authors:	WINCKLER, L. T. GUTHS, A. K. GAYER, P. R.
Affiliation:	LILIAN TEREZINHA WINCKLER, CPACT ANGÉLICA KONRADT GUTHS, UFPel PÂMELA RODRIGUES GAYER, Instituto Federal Sul-rio-grandense.
Date Issued:	2017
Citation:	Pesquisa Agropecuária Brasileira, Brasília, DF, v. 52, n. 4, p. 261-270, abr. 2017.
Description:	The objective of this work was to evaluate the ecosystem functions of a natural wetland and of artificially flooded rice areas, managed under organic and conventional systems, by phytomass degradation and by the colonization of this material by benthic macroinvertebrates. The experiment was carried out in a natural wetland area, and in two flooded rice areas managed under organic and conventional systems. Twenty-five decomposition bags filled with 10 g of dry vegetation were installed in each site. At 14, 28, 42, 56, and 70 days after the beginning of the experiment, five bags from each site were collected. Macroinvertebrates were identified and classified by functional trophic group. The number of species of benthic macroinvertebrates increased: natural wetland > organic system > conventional system. The Chironomidae group was present in all areas, confirming its food plasticity and adaptability to different substrates and environmental stress situations. The Amphipoda group was present only in the artificially flooded rice area, and the Acari, only in the natural wetland. The diversity of species in the natural wetland area was higher than in the artificially flooded rice area. Nutrient cycling, provided by phytomass decomposition, is affected by the management system, and the delay in this process causes a reduction of the ecosystem functions in the conventional system.
Thesagro:	Planossolo Oryza Sativa
NAL Thesaurus:	Aqualfs Ecosystem services Biogeochemical cycles Paddy soils
Keywords:	Degradação da biomassa Serviço ecossistêmico Ciclagem de nutriente Solo de várzea
Notes:	Título em português: Macroinvertebrados betônicos e degradação da fitomassa como indicadores de funções ecossistêmicas em arroz irrigado por inundação.
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CPACT)