Reis D F, Machado M M D, Coutinho N P, Rangel J V, Moretti M S, Morais P B
Laboratório de Microbiologia Ambiental e Biotecnologia, Programa de Doutorado em Biodiversidade e Biotecnologia da Rede Bionorte, Universidade Federal do Tocantins - UFT, Campus Universitário de Palmas, ALCNO 14, NS 15, Bloco II, sala 5, CEP 77001-923, Palmas, TO, Brasil.
Laboratório de Microbiologia Ambiental e Limnologia, Curso de Engenharia Ambiental, Universidade Federal do Tocantins - UFT, Campus Universitário de Palmas, ALCNO 14, NS 15, Prédio de Coleções Biológicas II, CEP 77001-923, Palmas, TO, Brasil.
Braz J Biol. 2019 Jan-Mar;79(1):22-28. doi: 10.1590/1519-6984.170644. Epub 2018 Apr 23.
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.
大型无脊椎动物碎食者更喜欢食用经真菌和细菌预处理的树叶，这些树叶对它们更具适口性。塞拉多地区的植物物种含有高浓度的化学元素，如木质素、纤维素、酚类和单宁，因此对碎食者的吸引力较小，适口性也较差。本研究旨在评估叶蝉属大型无脊椎动物碎食者对来自两个不同生物群落（塞拉多和大西洋森林）的植物材料的取食偏好，这些植物材料在大西洋森林的一条溪流中预处理后，观察其物理和化学特征。从2014年8月至2015年1月，每月从每个生物群落中一条500米长的溪流沿岸植被的凋落物中收集衰老叶片。选择每条溪流中数量最多的物种进行实验。实验设计包括两种处理。第一种处理（T1）包括来自油橄榄金叶树（塞拉多物种）的叶盘以及来自圆锥花紫金牛（大西洋森林物种）的叶盘，它们在大西洋森林溪流中进行预处理。第二种处理（T2）涉及在大西洋森林和塞拉多溪流中预处理的圆锥花紫金牛叶盘。两项测试均显示两种处理（T1和T2）之间存在显著差异。对于T1，叶蝉属对圆锥花紫金牛叶盘有取食，但对油橄榄金叶树叶盘没有取食。对于T2，叶蝉属更喜欢在大西洋森林溪流中预处理的圆锥花紫金牛叶片，而不是在塞拉多溪流中预处理的。结果表明，叶蝉属对大西洋森林生物群落的食物碎屑表现出偏好，而对塞拉多生物群落的食物碎屑则有排斥。
