Fungos associados ao processo de decomposição foliar: 2 anos de estudo

Marques, Anelise Kappes; Silva, Jéssica Barros Aguiar; Armiato, Amaraina Maia; Santos, Laciene Marinho; Morais, Paula Benevides de

doi:10.18067/jbfs.v2i4.58

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“…In contrast, in the Cerrado stream, the fungal community produced no major change in the substrate within 10 days. Marques et al (2015) show that fungal colonization in streams of that Cerrado region, including Buritizal stream occurs more effectively in 30 days of conditioning, when the fungal counts reach maximum values and then decays. During conditioning, the leaves lose 10-30% of its original mass, becoming softer as the polymers are attacked by fungal enzymes (Suberkropp and Klug, 1980;Chamier, 1985).…”

Section: Discussionmentioning

confidence: 90%

Feeding preference of the shredder Phylloicus sp. for plant leaves of Chrysophyllum oliviforme or Miconia chartacea after conditioning in streams from different biomes

et al. 2019

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Macroinvertebrate shredders consume preferably leaves conditioned by fungi and bacteria which offer greater palatability to them. Plant species in Cerrado present high concentration of chemical elements such as lignin and cellulose, phenols and tanins thus making them less attractive for shredders consumption and limiting the palatability. This study aimed to evaluate the feeding preference of a macroinvertebrate shredder of the genus Phylloicus for plant material from two different biomes (Cerrado and Mata Atlântica), after conditioning in a stream of Mata Atlântica and observing their physical and chemical characteristics. Senescent leaves were collected, monthly from the litterfall of riparian vegetation in a 500 m stretch of a stream in each biome from August 2014 to January 201. The most abundant species in each stream was selected for the experiment. The experimental design consisted in with two treatments. The first (T1) comprised leaf discs from Chrysophyllum oliviforme (Cerrado species) together with leaf discs of Miconia chartacea (Atlantic Forest species) which were conditioned in the Atlantic Forest stream. The second treatment (T2) involved leaf discs of Miconia chartacea conditioned in Mata Altlântica and Cerrado streams. Both tests had showed significant differences between the two treatments (T1 and T2). For T1, there was consumption of M. chartacea leaf discs by Phylloicus sp., but there was no consumption of C. oliviforme discs. For T2, there was preference for M. chartaceae leaves conditioned in a stream of Mata Atlântica than in Cerrado stream. The results showed that Phylloicus sp., had presented preference for food detritus of the Mata Antlântica biome and rejection to the one from Cerrado biome.

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Section: Discussionmentioning

confidence: 90%