Graduate Program in Organismic and Evolutionary Biology, University of Massachusetts Amherst, Amherst, Massachusetts, USA.
Department of Environmental Conservation, University of Massachusetts Amherst, Amherst, Massachusetts, USA.
Ecol Lett. 2024 Aug;27(8):e14494. doi: 10.1111/ele.14494.
Introduction history, including propagule pressure and residence time, has been proposed as a primary driver of biological invasions. However, it is unclear whether introduction history increases the likelihood that a species will be invasive or only the likelihood that it will be established. Using a dataset of non-native species historically available as ornamental plants in the conterminous United States, we investigated how introduction history relates to these stages of invasion. Introduction history was highly significant and a strong predictor of establishment, but only marginally significant and a poor predictor of invasive success. Propagule pressure predicted establishment better than residence time, with species likely to be established if they were introduced to only eight locations. These findings suggest that ongoing plant introductions will lead to widespread establishment but may not directly increase invasive success. Instead, other characteristics, like plant traits and local scale processes, may better predict whether a species becomes invasive.
引言
历史引种，包括繁殖体压力和居留时间，被认为是生物入侵的主要驱动因素。然而，目前尚不清楚引种历史是增加了物种入侵的可能性，还是仅仅增加了其定殖的可能性。本研究利用了一个历史上作为观赏植物引入美国大陆的非本地物种数据集，调查了引种历史与入侵的这些阶段的关系。引种历史具有显著意义，是建立的有力预测因子，但仅具有边际意义，是入侵成功的不良预测因子。繁殖体压力比居留时间更能预测建立，若物种仅引入 8 个地点，则可能建立。这些发现表明，持续的植物引种将导致广泛的建立，但不一定直接增加入侵的成功。相反，其他特征，如植物特性和局部尺度过程，可能更好地预测一个物种是否会成为入侵种。
