Green leaves enhance the growth and development of a stream macroinvertebrate shredder when senescent leaves are available
Green leaves enhance the growth and development of a stream macroinvertebrate shredder when senescent leaves are available
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当有衰老叶子时，绿叶可促进大型无脊椎动物粉碎机的生长和发育
DOI：
10.1111/j.1365-2427.2005.01353.x
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发表时间：
2005
影响因子：
2.7
通讯作者：
T. Kagaya
中科院分区：
文献类型：
--
作者：
K. Kochi;T. Kagaya
总结
1.在春季和夏季，陆生植物刚落下的绿色叶子和花朵进入温带溪流，这时衰老的落叶通常很少。这些资源似乎提供了很好的补充食物的大型无脊椎动物切碎机，但有一些潜在的缺点作为食品或案件材料的石蛾。
2.为了比较绿色叶或花和衰老叶对溪流切碎机的生长和发育的适合性，我们在实验室中饲养了石蛾Lepidostoma complexatum，其处理分别为幼虫提供衰老（橡木）和绿色（橡木或枫树）叶，并且还一起提供，以防两种类型的叶的组合使用可能有益于切碎机。
3.单独提供绿色叶的幼虫的生长速率是单独提供衰老叶的幼虫的65%，这是由于它们的消耗速率较低。单独给予绿色叶子的个体没有发育成成虫，而单独给予衰老叶子的个体中有70%发育成成虫。由于酚含量高，绿色叶子可能会抑制幼虫的食用，或者它们可能不适合作为外壳材料，因为它们不如衰老的叶子坚韧。
4.幼虫提供了衰老和绿色叶（或花）有更高的生长速度和发展速度，比那些单独的衰老叶，而成功出现的个人的比例没有差异。当与衰老叶片一起使用时，鳞口藻可能受益于绿色叶片的较高氮含量。
5.这些结果表明，绿色叶（或花）不能作为一个替代的食物资源，衰老的叶子，但他们可以提高的生长和发展的鳞口流粉碎机，如果衰老的叶子也可用。
Summary
1. Freshly fallen green leaves and flowers of terrestrial plants enter temperate streams in spring and summer, when senescent leaf litter is often scarce. These resources appear to provide good supplementary food for macroinvertebrate shredders, but have some potential shortcomings as food or case material for caddisflies.
2. To compare suitability of green leaves or flowers and senescent leaves for the growth and development of stream shredders, we reared the caddisfly Lepidostoma complicatum in the laboratory with treatments that provided larvae with senescent (oak) and green (oak or maple) leaves separately, and also together, in case the combined use of both types of leaf may benefit the shredder.
3. Larvae supplied with green leaves alone grew at 65% of the rate of those provided with senescent leaves alone, due to their lower consumption rate. No individuals given green leaves alone developed into adults, whereas 70% of the individuals given senescent leaves alone did. Green leaves may inhibit larval consumption due to their high phenol content, or they may be unsuitable for case material because they are less tough than senescent leaves.
4. Larvae supplied with both senescent and green leaves (or flowers) had a higher growth rate and developed faster, than those given senescent leaves alone, whereas the proportions of successfully emerged individuals did not differ. Lepidostoma probably benefits from the higher nitrogen content of the green leaves when used together with senescent leaves.
5. These results suggest that green leaves (or flowers) cannot serve as an alternative food resource to senescent leaves, but that they can enhance the growth and development of a Lepidostoma stream shredder if senescent leaves are also available.