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A latitudinal gradient in Darwin's naturalization conundrum at the global scale for flowering plants.


ABSTRACT: Darwin's naturalization conundrum describes two seemingly contradictory hypotheses regarding whether alien species closely or distantly related to native species should be more likely to naturalize in regional floras. Both expectations have accumulated empirical support, and whether such apparent inconsistency can be reconciled at the global scale is unclear. Here, using 219,520 native and 9,531 naturalized alien plant species across 487 globally distributed regions, we found a latitudinal gradient in Darwin's naturalization conundrum. Naturalized alien plant species are more closely related to native species at higher latitudes than they are at lower latitudes, indicating a greater influence of preadaptation in harsher climates. Human landscape modification resulted in even steeper latitudinal clines by selecting aliens distantly related to natives in warmer and drier regions. Our results demonstrate that joint consideration of climatic and anthropogenic conditions is critical to reconciling Darwin's naturalization conundrum.

SUBMITTER: Fan SY 

PROVIDER: S-EPMC10570376 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature

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A latitudinal gradient in Darwin's naturalization conundrum at the global scale for flowering plants.

Fan Shu-Ya SY   Yang Qiang Q   Li Shao-Peng SP   Fristoe Trevor S TS   Cadotte Marc W MW   Essl Franz F   Kreft Holger H   Pergl Jan J   Pyšek Petr P   Weigelt Patrick P   Kartesz John J   Nishino Misako M   Wieringa Jan J JJ   van Kleunen Mark M  

Nature communications 20231012 1


Darwin's naturalization conundrum describes two seemingly contradictory hypotheses regarding whether alien species closely or distantly related to native species should be more likely to naturalize in regional floras. Both expectations have accumulated empirical support, and whether such apparent inconsistency can be reconciled at the global scale is unclear. Here, using 219,520 native and 9,531 naturalized alien plant species across 487 globally distributed regions, we found a latitudinal gradi  ...[more]

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