Nonnative species often transform local communities to the detriment of native species. Much of the existing invasion ecology research focuses on the effects of a few extremely impactful species, and it is less clear how nonnative species which are not causing economic or ecological impacts alter closely related natives at risk of being displaced. Filling these knowledge gaps is critical because consequences of nonnative species are likely to vary depending on taxonomic scale, functional trait, and spatial or temporal niche. We conducted a meta-analysis to evaluate how biodiversity of native Formicidae (ants), Carabidae (ground beetles), and Scolytinae (bark and ambrosia beetles) species changes across a gradient of pressure from nonnative confamilials. We calculated Hill numbers for each group from data presented in literature and correlated native diversity metrics to proportion of nonnative species. Species richness of native ants was significantly negatively correlated with proportions of nonnative ants, whereas bark and ambrosia beetle metrics showed a nonsignificant negative correlation. Nonnative ground beetles had neutral effects on diversity of native ground beetles. Resulting contrasting patterns of invasive species effects on natives suggest complex biotic and abiotic factors driving effects of nonnative species in these groups. Our results suggest that a few extreme examples (e.g., red imported fire ants) drive most of the changes seen in native arthropod communities. To accurately assess impacts of invaders on native arthropod diversity, baseline data are needed, and community analyses must consider diverse functional traits of native taxa and improve the depth and breadth of community sampling.

中文翻译：

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非本地蚂蚁（膜翅目：甲虫），甲虫（鞘翅目：Carabidae）以及树皮和Ambrosia甲虫（鞘翅目：Curculionidae）对当地同伴的比较荟萃分析效果。

非本地物种通常会改变当地社区，从而损害本地物种。现有的大多数入侵生态学研究都集中在一些极具影响力的物种的影响上，尚不清楚的是，未引起经济或生态影响的非本地物种如何改变紧密相关的，有被迫流离失所风险的本地人。填补这些知识空白至关重要，因为非本地物种的后果可能会根据分类规模，功能特征以及时空生态位而变化。我们进行了一项荟萃分析，以评估本地甲虫（蚁），甲壳虫（地甲虫）和鞘翅目（树皮和失语甲虫）物种的生物多样性如何在非本地同居者的压力梯度范围内变化。我们根据文献中提供的数据计算了每组的希尔数，并将原生多样性指标与外来物种的比例相关联。本地蚂蚁的物种丰富度与非本地蚂蚁的比例呈显着负相关，而树皮和失落的甲虫指标则呈非显着负相关。非本土甲虫对本土甲虫的多样性具有中性影响。入侵物种对本地人的影响的结果形成了鲜明对比的模式表明，复杂的生物和非生物因素驱动了这些群体中非本地物种的影响。我们的结果表明，一些极端的例子（例如，红色的进口火蚁）驱动了本地节肢动物群落中发生的大多数变化。为了准确评估入侵者对本地节肢动物多样性的影响，需要基准数据，