Shredder colonization and decomposition of green and senescent leaves during summer in a headwater stream in northern Japan
Shredder colonization and decomposition of green and senescent leaves during summer in a headwater stream in northern Japan
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DOI：
10.1007/s11284-006-0149-y
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发表时间：
2006-02
影响因子：
2
通讯作者：
K. Kochi;S. Yanai
中科院分区：
文献类型：
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作者：
K. Kochi;S. Yanai
2000 年 6 月至 7 月，我们在日本北部北海道的沿海源头溪流中使用绿色和衰老的枫树和桤木叶子进行了分解实验。我们估计了实验期间绿色和衰老叶子在叶子上的粉碎机定植和叶子分解是否存在差异。晚龄Lepidostoma complicatum（Trichoptera）和Sternomoera rhyaca（Amphpoda）是在垃圾袋中定居的大型无脊椎动物中的主要粉碎类群。尽管我们发现枫叶和桤木叶之间存在显着差异，但绿色叶子和衰老叶子之间的碎纸机定植没有显着差异。 L.大型个体的定殖模式。复杂化和S. rhyacad 与小个体不同。绿叶和衰老叶的分解系数均较高。在实验过程中，枫树的分解速度明显快于桤木叶子，尽管绿色叶子和衰老叶子之间没有发现显着差异。然而，在实验过程中，绿叶中的碎片氮部分高于衰老叶。绿色叶子中的颗粒有机物释放的氮量比衰老叶子中的氮释放量高（2-2.5倍），这表明绿色叶子可能是其他大型无脊椎动物采集物种的潜在有价值的食物资源。
We conducted a decomposition experiment using green and senescent maple and alder leaves in a coastal headwater stream in Hokkaido, northern Japan, during June and July 2000. We estimated whether shredder colonization on the leaves and leaf breakdown differed between green and senescent leaves during the experimental period. Late-instarLepidostoma complicatum(Trichoptera) andSternomoera rhyaca(Amphipoda) were the predominant shredder taxa among the macroinvertebrates that colonized litterbags. There was no significant difference in shredder colonization between green and senescent leaves although we found a significant difference between maple and alder leaves. The colonization patterns of large individuals ofL. complicatumandS. rhyacadiffered from those of small individuals. All decomposition coefficients of green and senescent leaves were high. During the experiment, decomposition was significantly faster in maple than in alder leaves, although no significant difference was found between green and senescent leaves. However, the fragmented nitrogen portion was higher in green leaves than in senescent leaves during the experiment. Higher nitrogen release (2–2.5 times more) as particulate organic matter in green than in senescent leaves indicates that green leaves may be a potentially valuable food resource for other macroinvertebrate collector–gatherer species.