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首页> 外文期刊>Limnology >Input, retention, and invertebrate colonization of allochthonous litter in streams bordered by deciduous broadleaved forest, a conifer plantation, and a clear-cut site in southwestern Japan
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Input, retention, and invertebrate colonization of allochthonous litter in streams bordered by deciduous broadleaved forest, a conifer plantation, and a clear-cut site in southwestern Japan

机译：在日本西南部以落叶阔叶林，针叶树人工林和明确地点为边界的溪流中，异源垃圾的输入，保留和无脊椎动物定殖

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摘要

In headwater streams, conifer plantation forestry may affect stream communities through the quantity and quality of basal resources (allochthonous litter). We compared (1) the seasonal patterns of litter input from the riparian canopy, (2) those for the abundance of benthic and drifting litter in streams, and (3) the density of litter-associated invertebrates among streams bordered by deciduous broadleaved forest, a plantation of Japanese cedar (Cryptomeria japonica), and a clear-cut site, to extract the characteristics of conifer-plantation streams in terms of litter dynamics and benthic invertebrates. The results illustrate differences in litter input and in-stream processes between the broadleaved and plantation sites, although the total annual inputs from canopy were similar. In the broadleaved site, high litter storage was limited to winter, probably because pulsed inputs of litter in autumn were retained on the streambed but rapidly processed. In contrast, litter input was more constant at the plantation site, and litter was stored throughout the year. Although the litter-patch-specific density of total invertebrates was similar between the broadleaved and plantation sites, estimates of the reach-scale, habitat-weighted density considering differences in the coverage area of litter patches revealed considerable differences. Although the habitat-weighted density of total invertebrates was lower at the plantation site than at the broadleaved site in winter, it was noticeably higher at the plantation site in summer, owing to the seasonal stability of benthic litter abundance. Our results emphasized the importance of considering the spatiotemporal availability of benthic litter when assessing the effects of conifer plantations on stream ecosystems.
机译：在源头溪流中，针叶林人工林可能会通过基础资源（无用凋落物）的数量和质量影响溪流社区。我们比较了（1）沿河冠层输入的凋落物的季节性模式，（2）溪流中底栖和漂流垃圾的丰富度，以及（3）与落叶阔叶林接壤的溪流中与垃圾相关的无脊椎动物的密度，日本雪松（Cryptomeria japonica）人工林和明确的地点，以从凋落物动态和底栖无脊椎动物的角度提取针叶树人工林的特征。结果表明，阔叶林和人工林立地的凋落物输入量和溪流过程有所不同，尽管来自冠层的年总输入量相似。在阔叶林地，高凋落物的储存仅限于冬季，这可能是因为秋天的脉冲式凋落物保留在河床中，但处理速度很快。相比之下，在人工林中的凋落物输入更为稳定，并且一年四季都存储着凋落物。尽管阔叶林和人工林之间总无脊椎动物的斑块特定密度相似，但考虑到斑块覆盖面积的差异，对触角规模，生境加权密度的估计显示出相当大的差异。尽管冬季人工林的总无脊椎动物生境加权密度要比阔叶林的低，但由于底栖凋落物的季节性稳定，夏季人工林的栖息地加权密度明显高于夏季。我们的结果强调了在评估针叶树人工林对河流生态系统的影响时，应考虑底栖垃圾的时空可用性。

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  • 来源
    《Limnology》 |2012年第2期|p.207-219|共13页
  • 作者

    Mikio Inoue; Sei-ichi Shinotou; Yusuke Maruo; Yo Miyake;

  • 作者单位

    Graduate School of Science and Engineering, Ehime University, Bunkyo-cho 2-5, Matsuyama, 790-8577, Japan;

    Graduate School of Science and Engineering, Ehime University, Bunkyo-cho 2-5, Matsuyama, 790-8577, Japan;

    Faculty of Science, Ehime University, Bunkyo-cho 2-5, Matsuyama, 790-8577, Japan;

    Graduate School of Science and Engineering, Ehime University, Bunkyo-cho 2-5, Matsuyama, 790-8577, Japan;

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  • 正文语种 eng
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  • 关键词

    Coarse particulate organic matter; Cryptomeria japonica; Forestry; Needle litter; Shredder;

    机译：粗颗粒有机物;柳杉;林业;针叶;切碎机;

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