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首页> 美国卫生研究院文献>Ecology and Evolution >Leaf litter quality drives the feeding by invertebrate shredders in tropical streams
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Leaf litter quality drives the feeding by invertebrate shredders in tropical streams

机译：叶子垃圾质量通过热带溪流中的无脊椎碎纸机送饲料

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Amazon and Cerrado‐forested streams show natural fluctuations in leaf litter quantity along the time and space, suggesting a change on litter quality input. These natural fluctuations of leaf litter have repercussion on the organic matter cycling and consequently effects on leaf decomposition in forested streams. The effects of the quantity of leaf litter with contrasting traits on consumption by larvae of shredder insects from biomes with different organic matter dynamics have still been an understudied question. The Trichoptera spp. is a typical shredder in tropical headwater streams and keep an important role in leaf litter decomposition. Here, we assessed the consumption by shredder spp., from Amazonia and Cerrado biomes, on higher ( ) and lower quality leaves ( ) in different proportions and quantities. Experiments were performed concomitantly in microcosms approaches, simulating Cerrado and Amazonian streams. Higher leaf consumption occurred in Cerrado microcosms. Litter quantity influenced negatively leaf consumption by shredders in Cerrado, in opposition to Amazonia, where consumption was not affected by leaf quantity. In both sites, we observed higher consumption by shredders in treatment with only and no difference between other treatments with mixture of leaves. In treatment with litter of we noted the use of substrate for case building (due to the higher leaf toughness) affecting the fragmentation process. Therefore, our results indicate that leaf litter quality drives the preference of consumption by larvae in Cerrado and Amazonia streams.
机译：亚马逊和森林植物溪流沿着时间和空间展示叶垃圾量的自然波动，表明垃圾质量输入的变化。这些叶片的自然波动对有机物质循环产生影响，从而对森林流中的叶片分解作用。叶片凋落物量对粉碎器昆虫幼虫与不同有机物质动态的生物群岛幼虫的影响仍然是一个被解读的问题。 Trichoptera SPP。是热带地下水流的典型碎纸机，在叶凋落物分解中保持重要作用。在这里，我们评估了Shredder SPP的消费。，来自Amazonia和Cerrado Biomes，更高（）和较低质量的叶子（）以不同的比例和数量。实验在微科学方法，模拟Cerrado和Amazonian流中均匀地进行。在Cerrado Microcosms发生更高的叶片消耗。垃圾量影响了Cerrado的粉碎剂，反对亚马逊，消费不受叶子量的影响。在这两个地方，我们观察到粉碎机在治疗中的较高消耗，其余其他治疗与叶子的混合物无差异。在用垃圾处理的情况下，我们注意到基板用于案例建筑物（由于叶片韧性较高）影响碎片过程。因此，我们的结果表明，叶子垃圾质量推动了幼虫在Cerrado和Amazonia Streams中消耗的偏好。

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