Soil faunal and structural responses to the settlement of a semi-sedentary earthworm Lumbricus terrestris in an arable clay field
Soil faunal and structural responses to the settlement of a semi-sedentary earthworm Lumbricus terrestris in an arable clay field
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耕地粘土田中半定居蚯蚓 Lumbricus terrestris 沉降的土壤动物和结构响应
DOI：
10.1016/j.soilbio.2017.09.001
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发表时间：
2017
影响因子：
9.7
通讯作者：
J. Mikola
中科院分区：
文献类型：
--
作者：
V. Nuutinen;K. Butt;J. Hyväluoma;E. Ketoja;J. Mikola
我们研究了将深穴、定居生活方式的蚯蚓 Lumbricus terrestris（露蠕虫）引入可耕种的零耕粘土后对土壤群落和栖息地的影响。引入17年后，最初的目的是提高重粘土的大孔隙度和渗透性，我们又回到了L梯度。 terrestrisdispersal（充分成立，较新且无定居），并调查了生态系统工程对不同动物群（蚯蚓、enchytraeids和线虫）和土壤孔隙度影响的时间发展。动物群的反应在 L 处进行了检查。 terrestrismidden 尺度（个人居住地）和田野尺度。我们发现L. terrestrismiddens 维持了所有三个动物群密度的升高。就蚯蚓而言，有证据表明工程影响的时间发展，因为中部和非中部区域之间的差异在成熟区域比靠近扩散前沿的区域更为明显。蚯蚓群落组成在L时没有改变。 地球中间的地点。 L 的定居点。 terrestris 对田间规模的蚯蚓和线虫丰度没有明显影响，但在扩散的前沿之外几乎不存在 enchytraeids。然而，这种效应的部分原因可能是粘土含量增加的梯度。土壤大孔隙度 L. 陆地中心位点并没有随着L年龄的增长而增加。 陆地定居。我们的结果表明 L. 粘土中的陆地沉降可以显着增加土壤动物的空间斑块性，但除了 enchytraeids 之外，可能不会影响其田间规模的丰度或 L 附近土壤的大孔隙度。 陆地生活场所。
We studied the soil community and habitat consequences of introducing a deep-burrowing, sedentary life-style earthworm,Lumbricus terrestris(dew-worm) into arable zero-till clay. Seventeen years after introduction, which was originally aimed at improving the macroporosity and permeability of the heavy clay soil, we returned to the gradient ofL. terrestrisdispersal (well established, more recent and no settlement) and investigated the temporal development of the ecosystem engineering impacts on different faunal groups (earthworms, enchytraeids and nematodes) and soil porosity. The faunal responses were examined both atL. terrestrismidden scale (individual living site) and field scale. We found thatL. terrestrismiddens sustained elevated densities of all three faunal groups. In the case of earthworms, there was evidence for temporal development of the engineering impact as the difference between the midden and non-midden areas was more pronounced in the well-established areas than close to the leading edge of dispersal. The earthworm community composition was not altered atL. terrestrismidden sites. The settlement ofL. terrestrishad no discernible effects on field-scale earthworm and nematode abundances, but enchytraeids were practically absent beyond the leading edge of the dispersal. This effect might, however, be partly explained by a gradient of increasing clay content. Soil macroporosity atL. terrestrismidden sites did not increase with the age ofL. terrestrissettlement. Our results suggest thatL. terrestrissettlement in a clay soil can significantly increase the spatial patchiness of soil fauna, but may not, except in the case of enchytraeids, affect their field-scale abundances or the macroporosity of the soil in the vicinity ofL. terrestrisliving sites.