7/31/2023 0 Comments Die bestimmung streamcloud![]() ![]() Queimadas é um distúrbio natural nas paisagens do Bioma Savana. Litter decomposition indirect fire effects allochthonous litter short-time scale Theses results indicate that fire can modify the relationships within decomposer communities in tropical stream ecosystems. The abundance of scrapers was found to be more important than fungal biomass or shredder abundance, probably due to their functioning in leaf fragmentation while consuming periphyton growing on leaf litter. Intermediate k values for all qualities of litter post-fire may indicate that fire is equalizing litter quality in the stream ecosystem. ![]() The pre-fire mean decomposition coefficient ( k = -0.012 day -1) was intermediate compared to that reported for other savannah streams, but post-fire it was lower ( k = -0.007 day -1), due to decreased allochthonous litter input and increased autochthones production. Disks were cut from leaves to determine ash-free dry mass, while the remaining material was oven-dried to determine dry mass. Replicate bags (n = 4 individually for each species, sampling time, fire event and mesh size) were then retrieved after 20 and 40 days and washed to separate the invertebrates before fire event and again immediately after fire. Senescent leaves of Inga laurina, Protium spruceanum and Rircheria grandis (2 ± 0.1 g dry mass) were individually placed in litter bags (30 × 30 cm: 10 mm coarse mesh and 0.5 mm fine mesh) and submerged in the study stream before and after fire. ![]() This study evaluates short-term post-fire effects on leaf litter breakdown, the invertebrate community and fungal biomass of litter from three different vegetal species in a tropical stream. Wildfire is a natural pulsed disturbance in landscapes of the Savannah Biome. Programa de Pós-graduação em Ciências Ambientais, Universidade Comunitária da Região de Chapecó – UNOCHAPECÓ, Rua Servidão Anjo da Guarda, 295-D, Efapi, CEP, Chapecó, SC, Brasil José Francisco Gonçalves-JúniorĪquaRiparia, Departamento de Ecologia, Universidade de Brasília – UnB, Asa Norte, Campus Universitário Darcy Ribeiro, CEP, Brasília, DF, Brasil About the authors Renato Figueiro Varella, s/n, Bairro Olaria, CEP, Nova Xavantina, MT, Brasil Paulino BambiĪquaRiparia, Departamento de Ecologia, Universidade de Brasília – UnB, Asa Norte, Campus Universitário Darcy Ribeiro, CEP, Brasília, DF, Brasil Natália GuedesĪquaRiparia, Departamento de Ecologia, Universidade de Brasília – UnB, Asa Norte, Campus Universitário Darcy Ribeiro, CEP, Brasília, DF, Brasil Cássia Alves Lima-Rezende Programa de Pós-graduação em Ecologia e Conservação, Universidade do Estado de Mato Grosso – UNEMAT, Av. Renato Figueiro Varella, s/n, Bairro Olaria, CEP, Nova Xavantina, MT, Brasil Helena Soares Ramos Cabette Renato Figueiro Varella, s/n, Bairro Olaria, CEP, Nova Xavantina, MT, Brasil Ricardo Keichi Umetsu ![]() Renato Figueiro Varella, s/n, Bairro Olaria, CEP, Nova Xavantina, MT, Brasil Paulo Fernandes Roges Souza Silva Francisco Mota, 572, Bairro Costa e Silva, CEP, Mossoró, RN, Brasil Andrezza Sayuri Victoriano Hirota Programa de Pós-graduação em Ecologia e Conservação, Universidade Federal Rural do Semi-Árido – UFERSA, Av. *e-mail: Cristiano Queiroz de Albuquerque ![]()
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