Invasive species–species that have successfully overcome the barriers of transport, introduction, establishment, and spread—are a risk to biodiversity and ecosystem function. Introduction effort is one of the main factors underlying invasion success, but life history traits are also important as they influence population growth. In this contribution, we first investigated life history traits of the Barbary ground squirrel, Atlantoxerus getulus, a species with a very low introduction effort. We then studied if their invasion success was due to a very fast life history profile by comparing their life history traits to those of other successful invasive mammals. Next, we examined whether the number of founders and/or a fast life history influences the invasion success of squirrels. Barbary ground squirrels were on the fast end of the “fast-slow continuum”, but their life history was not the only contributing factor to their invasion success, as the life history profile is comparable to other invasive species that do not have such a low introduction effort. We also found that neither life history traits nor the number of founders explained the invasion success of introduced squirrels in general. These results contradict the concept that introduction effort is the main factor explaining invasion success, especially in squirrels. Instead, we argue that invasion success can be influenced by multiple aspects of the new habitat or the biology of the introduced species.

入侵物种（已成功克服运输，引进，建立和传播障碍的物种）对生物多样性和生态系统功能构成了威胁。引进努力是成功入侵的主要因素之一，但是生活史特征也很重要，因为它们会影响人口增长。在这项贡献中，我们首先研究了巴巴里地松鼠Atlantoxerus getulus的生活史特征，这是一种引进工作量非常小的物种。然后，我们通过将它们的生活史特征与其他成功的入侵哺乳动物的生活史特征进行比较，研究了它们的入侵成功是否归因于非常快速的生活史。接下来，我们检查了创始人的人数和/或快速的生活史是否会影响松鼠的入侵成功。巴氏地松鼠处于“快-慢连续体”的快端，但是它们的生活史并不是入侵成功的唯一因素，因为其生活史可与其他没有如此低的入侵物种相媲美。介绍工作。我们还发现，无论是生活史特征还是创建者人数，都无法总体上解释引入的松鼠的入侵成功。这些结果与引入努力是解释入侵成功的主要因素的概念相矛盾，尤其是在松鼠中。相反，我们认为入侵成功与否可能受到新栖息地或引入物种生物学的多个方面的影响。