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Dynamics of allochthonous organic matter in a tropical Brazilian headstream BABT
Gonçalves Júnior,José Francisco; França,Juliana Silva; Callisto,Marcos.
The species composition of the riparian vegetation and the seasonal contribution of input and storage of fine and coarse particulate organic matter were assessed in a 3rd order stretch. Fourteen tree species in the riparian zone were identified, with 3 species contributing with 68% of total litter input: Miconia chartacea Triana (43%), Miconia cyathanthera Triana (16%) and Erythroxylum pelletarianum St. Hil (9%). The allochthonous input of coarse particulate organic matter (CPOM) was composed mainly by leaves (over 50%). Species composition and the contribution of each plant species biomass for vertical, lateral and soil inputs and benthic stocks varied along the study period. The maximum values found in September, November and December coincided with the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Riparian vegetation; Input; Standing stock; Cerrado; CPOM.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000700014
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Experimental assessment of temperature increase and presence of predator carcass changing the response of invertebrate shredders Biota Neotropica
Navarro,Fernanda Keley Silva Pereira; Rezende,Renan de Souza; Gonçalves Júnior,José Francisco.
The role of the invertebrate shredders in leaf decomposition process in tropical lotic ecosystems has been explored only recently. In addition to the influence of the quality of litter and the temperature, the risk of predation generally results in changes on the survival and behavior of invertebrate shredders. The aim of this study was to observe the responses of the invertebrate shredders to different species of leaf litters (Experiment 1: Talauma ovata and Inga laurina ; Experiment 2: Talauma ovata, Inga laurina and Richeria grandis ) under gradual temperature rise (24 °C, 26 °C, 28 °C, 30 °C, 32 °C), in the presence (Experiment 2) and absence (Experiment1) of fish (Astyanax sp.) carcasses, as well as to observe the possible consequences of the leaf...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Feeding activity; Global warming; Decomposition.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000400028
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