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首页> 外文期刊>Pedobiologia >Manipulating earthworm abundance using electroshocking in deciduous forests
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Manipulating earthworm abundance using electroshocking in deciduous forests

机译：在落叶林中使用电击处理earth的丰度

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Earthworms influence the biotic and abiotic characteristics of soils, but studying these effects in situ is challenging. Secondary forests in the Mid-Atlantic have abundant earthworm communities. To investigate the interaction of earthworms with the below- and aboveground part of the ecosystem, we manipulated earthworm densities in 1m~2 enclosures located at 12 study sites within four different-aged forest stands at the Smithsonian Environmental Research Center (SERC) in Maryland, USA. The treatment plots were created by trenching around the perimeter and lining the trenches with fiberglass mesh before backfilling. Two types of untrenched plots served as control and leaf litter treatment plots. Enclosures were electroshocked between four and nine times over a two-year period to remove earthworms and to compare densities among treatment and untrenched plots. Earthworms were weighed and identified to determine whether removal by electroshocking varied depending on body size or ecological grouping. Earthworm abundances were 30-50% lower in reduced-density enclosures than in high density enclosures; however, the efficiency of the exclusion treatments varied by earthworm size and ecological group. Manipulating earthworm populations in temperate forests to assess their influence on ecological functions is feasible using electroshocking, but careful planning is essential given the amount of effort required to set up and maintain the desired experimental conditions.
机译：influence会影响土壤的生物和非生物特征，但就地研究这些影响具有挑战性。大西洋中部的次生林拥有丰富的earth群落。为了研究earth与生态系统地下和地面之间的相互作用，我们在位于马里兰州史密森尼环境研究中心（SERC）的四个不同年龄的林分中的12个研究地点的1m〜2个围墙中操纵了den的密度，美国。通过在周界周围开槽并在回填之前用玻璃纤维网衬里来创建处理区。两种类型的未打结土地用作对照和叶子凋落物处理土地。在两年的时间里，将外壳电击四到九次，以去除earth并比较处理和未打ren的地块之间的密度。 worm被称重并被鉴定以确定通过电击的去除是否根据体型或生态学分组而变化。密度较低的机柜中than的密度比高密度机柜中的要低30-50％。但是，the处理的效率因earth大小和生态群而异。使用电震处理温带森林中的worm种群以评估其对生态功能的影响是可行的，但是考虑到建立和维持所需实验条件所需的大量工作，精心规划是必不可少的。

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