A global assessment of terrestrial alien ferns (Polypodiophyta): species’ traits as drivers of naturalisation and invasion
A global assessment of terrestrial alien ferns (Polypodiophyta): species’ traits as drivers of naturalisation and invasion
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对陆地外来蕨类植物（水龙藻）的全球评估：作为归化和入侵驱动因素的物种特征
DOI：
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发表时间：
2018
影响因子：
2.9
通讯作者：
D. Moodley
中科院分区：
文献类型：
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作者：
E. J. Jones;T. Kraaij;H. Fritz;D. Moodley
外来入侵植物带来的全球威胁促使人们进行清单编制和筛选，目的是了解不同分类群的入侵性。不同的性状影响物种的入侵性，但并不适用于所有的植物分类群。蕨类植物很少或不存在，但确实存在显著的蕨类入侵。我们利用已发表的文献和在线清单，开发了一个包括157种陆地外来真蕨类植物（水足植物）的全球清单。我们的目的是确定哪些特征会影响陆地外来蕨类植物归化或入侵的可能性。以过渡阶段为响应变量的广义线性模型用于评估各种人为、生物和分布特征对入侵的影响。我们的模型解释了与入侵相关的30-40%的差异，并表明地面生活形式，生殖可塑性，对干扰和不同光照条件的耐受性，以及广泛的引入范围（解释为高环境耐受性和在园艺中受欢迎）是外来蕨类入侵的重要决定因素。我们强调了哪些地理区域和蕨类植物的外来蕨类发病率最高，并确定了特别值得关注的物种。本研究有助于了解外来蕨类植物的入侵机制，并为今后对外来蕨类植物作为入侵物种的研究提供参考。
The global threat posed by invasive alien plants has prompted inventory compilations and screening exercises that aim to understand invasiveness in various taxa. Various traits influence the invasiveness of a species but do not apply to all plant taxa. Ferns are rare or absent from such inventories, but notable fern invasions do exist. We developed a global inventory of terrestrial alien true ferns (Polypodiophyta) comprising 157 species, using published literature and online inventories. We aimed to determine which traits influence the probability that a terrestrial alien fern will become naturalised or invasive. Generalised linear models with transition stages as response variables, were used to assess the effects of various anthropogenic, biological and distributional traits on invasiveness. Our model explained 30–40% of the variance associated with invasiveness and showed that a ground-dwelling life form, reproductive plasticity, tolerance for disturbance and varied light conditions, and a broad introduced range (interpreted as high environmental tolerance and popularity in horticulture) were important determinants of invasiveness in alien ferns. We highlighted which geographic regions and fern families had the highest incidences of alien ferns and identified particular species of concern. This study aids in the understanding of the mechanisms underlying invasiveness in alien ferns and the findings can inform future research on this understudied taxon as invasive species.