Conservation Genetics of Jacquemontia reclinata (Convolvulaceae), an Endangered Species from Southern Florida: Implications for Restoration Management
2008
Thornton, Hannah E.B. | Roncal, Julissa | Lewis, Carl E. | Maschinski, Joyce | Francisco-Ortega, Javier
Guidelines designed to aid in the restoration of rare species have been previously proposed using two primary strategies to select individuals for augmentation and reintroduction: mixing progeny from different populations or separating individuals from different populations. Understanding the genetic structure and diversity of an endangered species can offer insights into conservation management strategies. We used random amplified polymorphic DNA markers to assess the genetic structure and diversity of Jacquemontia reclinata, a federally endangered species endemic to Southeastern Florida. We sampled 20 percent of total number of individuals from eight of the ten known wild populations. Across individuals high levels of polymorphic loci (94.7%) were found and larger populations had greater genetic diversity. Cluster and ordination analyses found that one population was genetically differentiated from all the others; this population grows in a unique habitat. Most genetic variation (77.5%) was found within populations, and genetic distances between populations were not explained by their geographic distances. We recommend the use of two management units in restoration programs for J. reclinata, one consisting of the genetically differentiated population and the second consisting of the other seven populations sampled.
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