Data from: Temporal population-genetic structure of eastern mosquitofish in a dynamic aquatic landscape

We analyzed the effect of periodic drying in the Florida Everglades on spatio-temporal population genetic structure of eastern mosquitofish (Gambusia holbrooki). Severe periodic drying events force individuals from disparate sources to mix in dry-season relatively deep-water refuges. In 1996 (a wet year) and 1999 (a dry year), we sampled mosquitofish at 20 dry-season refuges distributed in three water-management regions and characterized genetic variation for 10 allozyme and 3 microsatellite loci. In 1996, most of the ecosystem did not dry, while in 1999, many of our sampling locations were isolated by expanses of dried marsh surface. In 1996, most spatial genetic variation was attributed to heterogeneity within regions. In 1999, spatial genetic variation within regions was not significant. In both years, a small but significant amount of variation (less than 1% of the total variation) was partitioned among regions. Variance was consistently greater than zero among long-hydroperiod sites within a region, but not among short-hydroperiod sites within a region, where hydroperiod was measured as time since last marsh surface dry-down forcing fishes into local refuges. In 1996, all sites were in Hardy-Weinberg equilibrium. In 1999, we observed fewer heterozygotes than expected for most loci and sites suggesting a Wahlund effect arising from fish leaving areas that dried and mixing in deep-water refuges

Data from: Temporal population-genetic structure of eastern mosquitofish in a dynamic aquatic landscape

We analyzed the effect of periodic drying in the Florida Everglades on spatio-temporal population genetic structure of eastern mosquitofish (Gambusia holbrooki). Severe periodic drying events force individuals from disparate sources to mix in dry-season relatively deep-water refuges. In 1996 (a wet year) and 1999 (a dry year), we sampled mosquitofish at 20 dry-season refuges distributed in three water-management regions and characterized genetic variation for 10 allozyme and 3 microsatellite loci. In 1996, most of the ecosystem did not dry, while in 1999, many of our sampling locations were isolated by expanses of dried marsh surface. In 1996, most spatial genetic variation was attributed to heterogeneity within regions. In 1999, spatial genetic variation within regions was not significant. In both years, a small but significant amount of variation (less than 1% of the total variation) was partitioned among regions. Variance was consistently greater than zero among long-hydroperiod sites within a region, but not among short-hydroperiod sites within a region, where hydroperiod was measured as time since last marsh surface dry-down forcing fishes into local refuges. In 1996, all sites were in Hardy-Weinberg equilibrium. In 1999, we observed fewer heterozygotes than expected for most loci and sites suggesting a Wahlund effect arising from fish leaving areas that dried and mixing in deep-water refuges

Additional Information Data_Dryad

This Excel file contains the site information including hydrological, management area, and latitude and longitude information

allgambusia data JOH_Dryad

This Excel file contains the microsatellite data and the allozyme data for the 40 sampled sites

Winter mortality in the green anole, Anolis carolinensis (Lacertilia: Polychridae)

Volume: 25Start Page: 140End Page: 14

Meeting Society\u27s Needs for Education and Discovery: A Survey of Eight Field Stations and Marine Laboratories in the Southeastern United States

Field stations and marine laboratories (FSMLs) are essential institutions for natural history education and research. Recently, the National Research Council suggested goals for FSMLs and that a metric be administered for their evaluation. We surveyed a non-random cross-section of 8 southeastern US FSMLs in different ecosystems to evaluate how they provide educational opportunities in accordance with National Research Council recommendations pertaining to convergence, STEM education, and interdisciplinary education. Survey responses were provided as narrative responses and through the completion of a rubric. FSML representatives reported generally high mean scores in categories addressed in the rubric. We observed the greatest variation in responses regarding the number of interdisciplinary programs offered across FSMLs. Rubric responses associated with convergence across programs, station culture, and facilities were relatively uniform. Although the FSMLs surveyed exhibited variations in ecosystems serviced and programs offered, all of the institutions provide a collaborative environment for individuals from multiple ages and backgrounds