Darwin's naturalization hypothesis does not explain the spread of nonnative weed species naturalized in Mexico.

ABSTRACT:

Background

Despite numerous tests of Darwin's naturalization hypothesis (DNH) evidence for its support or rejection is still contradictory. We tested a DNH derived prediction stating that nonnative species (NNS) without native congeneric relatives (NCR) will spread to a greater number of localities than species with close relatives in the new range. This test controlled the effect of residence time (Rt) on the spread of NNS and used naturalized species beyond their lag phase to avoid the effect of stochastic events in the establishment and the lag phases that could obscure the NCR effects on NNS.

Methods

We compared the number of localities (spread) occupied by NNS with and without NCR using 13,977 herbarium records for 305 NNS of weeds. We regressed the number of loc

SUBMITTER: Sanchez-Blanco J 

PROVIDER: S-EPMC6100849 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature