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The roles of biotic resistance and nitrogen deposition in regulating non-native understory plant diversity

机译：生物抗性和氮沉降在调控非原生林下植物多样性中的作用

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摘要

Understanding the mechanisms that allow for plant invasions is important for both ecologists and land managers, due to both the environmental and economic impacts of native biodiversity losses. We conducted an observational field study in 2008 to examine the relationship between native and non-native forest understory plant species and to investigate the influence of soil nitrogen (N) on plant community richness and diversity. In 2009, we conducted a companion fertilization experiment to investigate how various forms of N deposition (inorganic and organic) influenced native and non-native species richness and diversity. We found that native species richness and diversity were negatively correlated with 1) non-native species richness and diversity and 2) higher total soil inorganic N. In the deposition experiment, adding organic N fertilizers decreased native richness and diversity compared to inorganic N fertilizers. Together, these results indicate that increasing soil N can be detrimental to native species; however, native species richness and diversity may counteract the N-stimulation of non-native species. Furthermore, the negative effects of organic N deposition on native plants may be just as strong, if not stronger, than the effects of inorganic N deposition.
机译：由于本地生物多样性丧失的环境和经济影响，了解允许植物入侵的机制对生态学家和土地管理者都非常重要。我们在2008年进行了一项观察性实地​​研究，以调查原生林林和非原生林林下植物物种之间的关系，并调查土壤氮（N）对植物群落丰富度和多样性的影响。在2009年，我们进行了一项伴随施肥实验，以调查各种形式的氮沉降（无机和有机）如何影响本地和非本地物种的丰富度和多样性。我们发现，本地物种的丰富度和多样性与1）非本地物种的丰富度和多样性和2）土壤无机氮总量较高呈负相关。在沉积实验中，与无机氮肥相比，添加有机氮肥降低了本地物种的丰富度和多样性。总之，这些结果表明，增加土壤中的氮可能对本地物种有害。然而，本地物种的丰富性和多样性可能会抵消非本地物种对氮的刺激。此外，有机氮沉积对本地植物的负面影响可能与无机氮沉积的影响一样强，甚至更大。

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  • 来源
    《Plant and Soil》 |2011年第2期|p.257-269|共13页
  • 作者

    Rachel O. Jones; Samantha K. Chapman;

  • 作者单位

    Department of Natural Resources and Environmental Science, Ecology, Evolution, and Conservation Biology Graduate Group, University of Nevada, Reno, 1000 Valley Road, Reno, NV, 89512, USA;

    Department of Biology, Villanova University, 800 Lancaster Avenue, Villanova, PA, 19085, USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Invasion; Soil nitrogen; Non-native; Richness; Native; Diversity;

    机译：入侵;土壤氮;非本地;丰富度;本地;多样性;

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