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Abstract Climate change and land use change are two main drivers of global biodiversity decline, decreasing the genetic diversity that populations harbour and altering patterns of local adaptation. Landscape genomics allows measuring the effect of these anthropogenic disturbances on the adaptation of populations. However, both factors have rarely been considered simultaneously. Based on a set of 3660 SNPs from which 130 were identified as outliers by a genome–environment association analysis (LFMM), we modelled the spatial turnover of allele frequencies in 19 localities ofPinus leiophyllaacross the Avocado Belt in Michoacán state, Mexico. Then, we evaluated the effect of climate change and land use change scenarios, in addition to evaluating assisted gene flow strategies and connectivity metrics across the landscape to identify priority conservation areas for the species. We found that localities in the centre‐east of the Avocado Belt would be more vulnerable to climate change, while localities in the western area are more threatened by land conversion to avocado orchards. Assisted gene flow actions could aid in mitigating both threats. Connectivity patterns among forest patches will also be modified by future habitat loss, with central and eastern parts of the Avocado Belt maintaining the highest connectivity. These results suggest that areas with the highest priority for conservation are in the eastern part of the Avocado Belt, including the Monarch Butterfly Biosphere Reserve. This work is useful as a framework that incorporates distinct layers of information to provide a more robust representation of the response of tree populations to anthropogenic disturbances.more » « less
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Free, publicly-accessible full text available June 20, 2026
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Free, publicly-accessible full text available May 15, 2026
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The number of arrivals at the U.S.-Mexico border has increased dramatically over the past five years. To accommodate this increased flow, the Biden administration introduced a new program that allows migrants from ‘non-deportable’ countries - Cuba, Haiti, Nicaragua, and Venezuela (CHNV) - the opportunity to apply for parole while still in their home countries and arrive for U.S. Customs and Border Protection (CBP) appointments at a given port of entry, alleviating the numbers of unsolicited arrivals along the border. In this article, we analyze CBP data to assess the program's effectiveness in reducing irregular migration along the southern U.S. border. Our results show that the CHNV parole program has demonstrated varying levels of success in reducing border encounters, with pronounced, long-term effects for Cuban and Nicaraguan nationals and only temporary for Venezuelan and Haitian individuals. We explore the potential causes for these different outcomes and recommend program adjustments to facilitate the growing number of individuals pursuing lawful entry into the United States.more » « less
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