Where Is Garlic Mustard? Understanding the Ecological Context for Invasions of <i>Alliaria petiolata</i>.

Although there is an encouraging trend toward multisite studies over the last 13 years, many of these studies are not occurring across enough sites and regions.

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There was a slight trend toward sampling more sites per study in 2016–2017 (median = 6) and in 2018–2019 (median = 5), but the median number of sites per study remained close to 1 from 2008 to 2021 overall (figure 1 c), and the majority of the 111 studies (n = 76, 68%) sampled fewer than five sites.

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