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首页> 外文期刊>Ecological research >The effect of dense understory dwarf bamboo [Sasa senanensis) on soil respiration before and after clearcutting of cool temperate deciduous broad-leaved forest
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The effect of dense understory dwarf bamboo [Sasa senanensis) on soil respiration before and after clearcutting of cool temperate deciduous broad-leaved forest

机译：低温下温带落叶阔叶林开垦前后茂密的林下矮竹[Sasa senanensis]对土壤呼吸的影响

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摘要

To evaluate the effect of understory dwarf bamboo (Sasa senanensis) on soil respiration in forest ecosystems, we compared soil respiration rates between four deciduous broad-leaved forest sites representing two levels of understory Sasa (with and without) and two levels of forest stand age (50-year-old stand and l-year-old stand after clearcut). The understory Sasa enhances the soil respiration rate both before and after the clearcutting of deciduous broad-leaved forest. The Sasa sites had larger total belowground biomass compared with the non-Sasa sites, which could be attributed to Sasa presence. Our results also suggest that clearcutting decreases temperature-normalized soil respiration rates (Ris) and temperature sensitivity (Q10) in both Sasa and non-Sasa ecosystems. Clearcutting significantly reduced the fine root biomass of trees and Sasa. The fine roots of trees and Sasa had high specific respiration rates compared with larger roots and rhizomes at Sasa and non-Sasa sites, respectively. Therefore, we hypothesize that the loss of fine roots after clearcutting is responsible for the reduction in soil respiration rate. A comparison with other studies revealed a positive linear relationship between total (tree and Sasa) fine root biomass and R_(15), suggesting that fine root biomass controls soil respiration at the landscape scale. The Q_(10) value is also likely to be related to fine root biomass, although the relationship was not significant. We conclude that understory Sasa increases belowground biomass, especially fine roots, and the spatial variation in soil respiration at the landscape scale.
机译：为了评估林下矮竹（Sasa senanensis）对森林生态系统土壤呼吸的影响，我们比较了代表两个林下Sasa水平（有和没有）和两个林分年龄的四个落叶阔叶林站点之间的土壤呼吸速率（清除后为50岁的支架和l年的支架）。落叶林阔叶林砍伐之前和之后，林下莎莎都能提高土壤呼吸速率。与非Sasa站点相比，Sasa站点的地下总生物量更大，这可以归因于Sasa的存在。我们的结果还表明，在Sasa和非Sasa生态系统中，清除均会降低温度标准化的土壤呼吸速率（Ris）和温度敏感性（Q10）。砍伐明显减少了树木和Sasa的细根生物量。与分别位于Sasa和非Sasa站点的较大根和根茎相比，树木和Sasa的细根具有较高的比呼吸率。因此，我们假设清除后细根的损失是造成土壤呼吸速率降低的原因。与其他研究的比较表明，总（树木和Sasa）细根生物量与R_（15）之间呈正线性关系，表明细根生物量在景观尺度上控制土壤呼吸。 Q_（10）值也可能与细根生物量有关，尽管这种关系并不明显。我们得出的结论是，地下Sasa会增加地下生物量（尤其是细根），并增加景观尺度下土壤呼吸的空间变化。

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  • 来源
    《Ecological research》 |2012年第3期|p.577-586|共10页
  • 作者

    Y. Yashiro; Y. Shizu; T. Adachi; T. Ohtsuka; Y. Iimura; N. Lee; H. Koizumi;

  • 作者单位

    River Basin Research Center, Takayama Experimental Field Station, Gifu University, 919-47 Iwaicho,Takayama, Gifu 506-0815, Japan;

    River Basin Research Center, Takayama Experimental Field Station, Gifu University, 919-47 Iwaicho,Takayama, Gifu 506-0815, Japan;

    River Basin Research Center, Gifu University,1-1 Yanagido, Gifu 501-1193, Japan;

    River Basin Research Center, Gifu University,1-1 Yanagido, Gifu 501-1193, Japan;

    River Basin Research Center, Gifu University,1-1 Yanagido, Gifu 501-1193, Japan;

    National Park Research Institute, Korea National Park,16-1 Hogyeong-ri, Jucheon-myeon, Namwon-si,Jeonllabuk-do 590-811, South Korea;

    Department of Biology, Faculty of Education and Integrated Arts and Sciences, Waseda University,2-2 Wakamatsu, Shinjuku, Tokyo 162-8480, Japan;

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  • 关键词

    soil respiration; dwarf bamboo; understory; clearcutting; deciduous broad-leaved; forest;

    机译：土壤呼吸筱;底层清除落叶阔叶;森林;

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