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<p>An understanding of the genetic diversity and structure of endangered plant species can be vital for their management and recovery, especially in annual species with small, fragmented populations where the mating strategies and seed bank dynamics are largely unknown. Here, we investigated the population genetics of <i>Warea amplexifolia</i> (Brassicaceae), an endangered Florida annual, to help guide recovery strategies. We genotyped ten microsatellite loci to examine the nine remaining extant populations (<i>N</i> = 173). Overall genetic diversity was low. All populations showed some degree of selfing, with inbreeding and genetic clustering evident in many of the populations. The populations were probably historically connected through gene flow but have become isolated by distance. Establishing new populations on protected lands will be important for species recovery, as most of the extant populations are on private lands. Augmentations are recommended for the protected populations to enhance genetic resilience, and should be done using the nearest local population, except for the southernmost population which will likely require genetic rescue to persist.</p>

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Habitat fragmentation influences the population genetics of a Florida endemic: implications for recovery of a critically endangered plant

  • 期刊论文

  • 发表日期：

    2025年6月4日

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  • Christin L. Pruett,
  • Joseph Stroupe,
  • Cheryl L. Peterson

摘要

An understanding of the genetic diversity and structure of endangered plant species can be vital for their management and recovery, especially in annual species with small, fragmented populations where the mating strategies and seed bank dynamics are largely unknown. Here, we investigated the population genetics of Warea amplexifolia (Brassicaceae), an endangered Florida annual, to help guide recovery strategies. We genotyped ten microsatellite loci to examine the nine remaining extant populations (N = 173). Overall genetic diversity was low. All populations showed some degree of selfing, with inbreeding and genetic clustering evident in many of the populations. The populations were probably historically connected through gene flow but have become isolated by distance. Establishing new populations on protected lands will be important for species recovery, as most of the extant populations are on private lands. Augmentations are recommended for the protected populations to enhance genetic resilience, and should be done using the nearest local population, except for the southernmost population which will likely require genetic rescue to persist.