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首页> 外文期刊>Mycologia >Species-abundance distribution patterns of soil fungi: contribution to the ecological understanding of their response to experimental fire in Mediterranean maquis (southern Italy)
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Species-abundance distribution patterns of soil fungi: contribution to the ecological understanding of their response to experimental fire in Mediterranean maquis (southern Italy)

机译：土壤真菌的物种-丰富度分布模式：对地中海鼠对实验火的响应的生态理解的贡献

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摘要

Experimental fires, of both low and high intensity, were lit during summer 2000 and the following 2 y in the Castel Volturno Nature Reserve, southern Italy. Soil samples were collected Jul 2000-Jul 2002 to analyze the soil fungal community dynamics. Species abundance distribution patterns (geometric, logarithmic, log normal, broken-stick) were compared. We plotted datasets with information both on species richness and abundance for total, xerotolerant and heat-stimulated soil microfungi. The xerotolerant fungi conformed to a broken-stick model for both the low- and high intensity fires at 7 and 84 d after the fire; their distribution subsequently followed logarithmic models in the 2 y following the fire. The distribution of the heat-stimulated fungi changed from broken-stick to logarithmic models and eventually to a log-normal model during the post-fire recovery. Xerotolerant and, to a far greater extent, heat-stimulated soil fungi acquire an important functional role following soil water stress and/or fire disturbance; these disturbances let them occupy unsaturated habitats and become increasingly abundant over time.
机译：在2000年夏季以及随后的2年内，意大利南部的Castel Volturno自然保护区点燃了高强度和低强度的实验性大火。 2000年7月至2002年7月收集土壤样品，以分析土壤真菌群落动态。比较了物种的丰度分布模式（几何，对数，对数正态，折断条形）。我们绘制了有关物种丰富度和丰度信息的数据集，包括总的，耐旱的和热刺激的土壤微真菌。火灾后7和84天，低强度和高强度火灾的耐旱真菌均符合折断模型。火灾发生后的2年内，它们的分布随后遵循对数模型。在火后恢复过程中，热刺激真菌的分布从折断模型变为对数模型，最终变为对数正态模型。在土壤水分胁迫和/或火势干扰之后，耐旱的以及在更大程度上受热刺激的土壤真菌起着重要的功能作用;这些干扰使它们占据了不饱和的栖息地，并随着时间的推移变得越来越丰富。

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