Darwin’s naturalization conundrum disentangled: the role of phylogenetic relatedness depends on the invasion stages

We collected data on 5,091 alien angiosperm species that have been introduced to Southern Africa for cultivation. Then combined with lists of the global flora non-native to Southern Africa (n= 24,974 species), the naturalized and native species within the region of Southern Africa, and the species that have become invasive within the country of South Africa. This novel combination of datasets was used to test the Darwin’s naturalization conundrum at the different stages of the invasion process. Specifically, we showed how phylogenetic relatedness to native species is correlated with the subsequent stages of introduction, naturalization and invasiveness of alien species.我们收集了5091种被引入南部非洲用于栽培的外来被子植物（angiosperm）的数据。随后结合了三类数据清单：全球范围内非本土分布于南部非洲的植物区系（共24974种）、南部非洲区域内的归化物种与本土物种，以及南非共和国境内已成为入侵物种的类群。本研究借助这一全新整合的数据集，在入侵过程的不同阶段验证了达尔文归化之谜（Darwin's naturalization conundrum）。具体而言，我们阐明了外来物种与本土物种的系统发育亲缘关系，如何与其后续的引入、归化及入侵阶段相关联。