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首页> 外文期刊>The Science of the Total Environment >Decadal post-fire succession of soil invertebrate communities is dependent on the soil surface properties in a northern temperate forest
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Decadal post-fire succession of soil invertebrate communities is dependent on the soil surface properties in a northern temperate forest

机译：北部温带森林土壤无脊椎动物群落的十年蜕变后继生取决于土壤表面特性

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Although fires are common disturbances in North American forests, the extent to which soil invertebrate assemblages recover from burning remains unclear. Here, we examine long-term (14- to 101-yr) recoveries of soil invertebrate communities from common cut and burn treatments conducted at 6 to 26-yr intervals since 1911 in a deciduous forest in the upper Great Lakes region (USA). We characterize soil surface macro-invertebrate communities during both fall and spring across a long-term, experimental fire chronosequence to characterize invertebrate community recovery at decadal time-scales and community changes between seasons. We posited that changes in invertebrate community structure might, in turn, impact decomposition process. We sampled active organisms at the soil surface using pitfall traps. We described understory vegetation, measured soil properties, and conducted a 4-year litter bag study with big-toothed aspen leaves (Populus grandidentata). Invertebrate community responses followed a habitat accommodation model of succession showing that invertebrate succession is dependent on the soil surface properties. The fall and spring measures revealed that the densities of active invertebrates were highest 101 years after fire. For a given pair of stands, a pattern of sharing higher percentage of taxa was denoted when stands were of similar age. Some species such as the beetle Stelidota octomaculata appeared to be indicator of the chronosequence succession stage because it tracks the successional increase of Quercus and acorn production at the study site. We also found a significant positive correlation between leaf decomposition of soil macrofaunal accessible leaves and millipedes density across the chronosequence. We show that vegetation cover changes and related shifts in habitat structure occurring during post-fire succession are important in shaping communities assemblages. This finding highlights the importance of simultaneously considering abiotic-biotic factors together with above- and belowground measurements to better characterize controls on successional community dynamics after disturbance. (C) 2018 Elsevier B.V. All rights reserved.
机译：尽管火灾是北美森林中的常见干扰，但尚不清楚土壤无脊椎动物组合从燃烧中恢复的程度。在这里，我们研究了自1911年以来在美国大湖区上游的落叶林中以6至26年的间隔进行的普通砍伐和焚烧处理对土壤无脊椎动物群落的长期恢复（14至101年）。我们在长期和实验性的火灾时序上表征了秋季和春季的土壤表面大型无脊椎动物群落，以表征年代际尺度上无脊椎动物群落的恢复以及季节之间群落的变化。我们认为无脊椎动物群落结构的变化可能反过来影响分解过程。我们使用陷阱陷阱对土壤表面的活性生物进行了采样。我们描述了林下植被，测量了土壤的性质，并用大齿白杨树叶（Populus grandidentata）进行了为期四年的垃圾袋研究。无脊椎动物群落反应遵循生境适应演替模型，该模型表明无脊椎动物演替取决于土壤表面特性。秋季和春季措施表明，活动无脊椎动物的密度在火灾后101年最高。对于给定的一对看台，当它们具有相似的年龄时，将指示一种共享更高比例的分类单元的模式。一些物种（例如甲虫Stelidota octomaculata）似乎是时序序列继承阶段的指标，因为它跟踪了研究地点的栎类和橡子产量的连续增加。我们还发现土壤大型真菌可及叶片的叶片分解与整个时序序列的千足虫密度之间存在显着的正相关。我们表明，火灾后演替期间发生的植被覆盖变化和栖息地结构的相关变化对于塑造社区聚集非常重要。这一发现凸显了同时考虑非生物生物因素以及地上和地下测量的重要性，以更好地表征扰动后对演替社区动态的控制。 （C）2018 Elsevier B.V.保留所有权利。

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