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Biological colonization and leaf decomposition in a subtropical stream Ecología austral
Biasi,Cristiane; Cerezer,Cristina; Santos,Sandro.
In small streams, aquatic community obtains energy mainly from leaves of the riparian vegetation. Processing these leaves involves physical, chemical and biological factors that may difer among leaf species. We assessed the efects of litter quality on leaf decomposition and colonization by aquatic invertebrates in a subtropical stream. Leaves from two native, highly represented tree species common in subtropical riparian areas, Ficus luschnathiana and Gasearía sylvestris, were incubated in coarse mesh bags in a stream. Bags were sampled weekly during an incubation of 28 days. The decomposition rates were higher in leaves of F. luschnathiana than in those of C. sylvestris. In the frst seven days of the experiment, leaves of F. luschnathiana lost ~60% of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Shredders; Chironomidae; Leaf-toughness; Fungal biomass.
Ano: 2016 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2016000200008
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Leaf litter as a possible food source for chironomids (Diptera) in Brazilian and Portuguese headwater streams Zoologia
Callisto,Marcos; Gonçalves Jr,José F.; Graça,Manuel A. S..
Our objective was to evaluate the potential use of leaf detritus by chironomid larvae. Field and laboratory experiments were performed using leaves and chironomid species collected in Portugal and Brazil. Laboratory experiments under controlled conditions were done using microbial conditioned senescent leaves of Alnus glutinosa (L.) Gaertn, Neriumoleander L., Protium heptaphilum (Aubl.) March, Protium brasiliense (Spreng) Engl., Myrcia guyanensis(Aubl.) DC and Miconia chartacea Triana. Laboratory experiments were performed using specimens collected from leaf litter in local streams. Whenever possible, after the experiments, chironomids were allowed to emerge as adults and identified. In Portugal the following taxa were identified: Micropsectra apposita...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Leaf feeding; Shredders; Tropical and temperate experiments.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000200023
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Cultivable cellulolytic fungi isolated from the gut of Amazonian aquatic insects Acta Amazonica
BELMONT-MONTEFUSCO,Enide Luciana; NACIF-MARÇAL,Lorena; ASSUNÇÃO,Enedina Nogueira de; HAMADA,Neusa; NUNES-SILVA,Carlos Gustavo.
ABSTRACT Filamentous fungi have been targeted by bioprospecting studies because they are effective producers of extracellular enzymes that can potentially be used by the bioindustry. In this study, we isolated filamentous fungi from the guts of Amazonian aquatic insect larvae to evaluate their cellulolytic activity. We collected 69 larvae of shredder insects of three genera: Phylloicus (Trichoptera: Calamoceratidae), Triplectides (Trichoptera: Leptoceridae) and Stenochironomus (Diptera: Chironomidae) in ten streams from a protected area in the central Brazilian Amazon. Production of mycelia was elaborated in PDA (Potato Dextrose Agar) medium. The isolates were transferred to a synthetic medium with carboxymethyl cellulose, and Congo red was used to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cellulase; Enzymatic hydrolysis; Phylloicus; Shredders; Amazonia.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000400346
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Immature life cycle of laboratory-reared Phylloicus elektoros and Phylloicus amazonas (Trichoptera: Calamoceratidae) from a central Amazonian stream Acta Amazonica
MARTINS,Renato Tavares; SOARES,Kleicy Maciel; HAMADA,Neusa.
ABSTRACT We reared field-collected egg masses of the caddisflies Phylloicus amazonas (n = 2) and Phylloicus elektoros (n = 7) to adulthood. First instar larvae of both species hatched up to five days after field collection. Median development time from first larval instar to adult was 229 days for P. amazonas and 275 for P. elektoros, including the pupal development time (median of 13.5 and 16 days, respectively). Shredder organisms have been used frequently in studies related to organic matter processing in freshwater ecosystems. The biological information reported in here may be useful for the design of experimental studies in the field or under laboratory conditions.
Tipo: Info:eu-repo/semantics/report Palavras-chave: Aquatic insects; Development time; Life stages; Organic matter; Shredders.
Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672021000100067
Registros recuperados: 4
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