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Tolerance of two invasive thistles to repeated disturbance

机译：两种入侵蓟草对反复干扰的耐受性

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摘要

Many invasive species have short life cycles, high reproduction, and easily dispersed offspring that make them good ruderal species under disturbance. However, the tolerance of such ruderal species to disturbance is often overlooked. In a 2-year mowing study, we applied frequent intense disturbances to examine the tolerance of two congeneric invasive thistles, Carduus acanthoides and Carduus nutans, and potential differences in their responses. Our results show that both species can survive multiple mowing events, with C. acanthoides surviving repeated intense mowing through a whole season. Furthermore, C. acanthoides was found to adjust its growth form to the disturbance regime, and successfully overwintered and reproduced in the subsequent growing season if the disturbance was terminated. Our results support the idea that tolerance to disturbance should be considered when examining invasions by short-lived monocarpic species, since avoidance of disturbance via rapid life cycle completion and seed production, and tolerance of disturbance via regrowth can co-occur in these species. Consequently, management of short-lived invasives should take both life history strategies into account.
机译：许多入侵物种的生命周期短，繁殖力强并且后代易于分散，这使其成为受到干扰的优良good属物种。但是，这种族对干扰的耐受性常常被忽略。在一项为期2年的割草研究中，我们应用了频繁的强烈干扰来检查两种同类侵袭性蓟马刺a（Carduus acanthoides）和Card蒲（Carduus nutans）的耐受性以及它们的反应潜力。我们的结果表明，这两个物种都可以在多个割草事件中幸存下来，而刺。在整个季节中经过反复的激烈割草也可以幸存。此外，发现棘皮衣藻将其生长形式调整为干扰状态，如果干扰被终止，则其成功越冬并在随后的生长季节繁殖。我们的结果支持这样的想法，即在检查短寿命的单果类物种的入侵时应考虑对干扰的耐受性，因为在这些物种中可能同时发生通过快速生命周期完成和种子生产来避免干扰以及通过再生长来进行干扰的耐受性。因此，短命侵入性药物的治疗应同时考虑两种生活史策略。

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  • 来源
    《Ecological research》 |2011年第3期|p.575-581|共7页
  • 作者

    Rui Zhang; J. Mason Heberling; Emily Haner; Katriona Shea;

  • 作者单位

    Department of Biology, The Pennsylvania State University,208 Mueller Laboratory, University Park, PA 16802, USA;

    Department of Biology, The Pennsylvania State University,208 Mueller Laboratory, University Park, PA 16802, USA;

    Department of Biology, The Pennsylvania State University,208 Mueller Laboratory, University Park, PA 16802, USA;

    Department of Biology, The Pennsylvania State University,208 Mueller Laboratory, University Park, PA 16802, USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    disturbance; tolerance; invasive; carduus nutans; carduus acanthoides;

    机译：干扰;耐受性;侵袭性;坚果类;棘皮类;

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