4 Works

Context-dependent reproductive isolation: host plant variability drives fitness of hybrid herbivores

Linyi Zhang, Glen Hood, Isaac Carroo, James Ott & Scott Egan
The role of divergent selection between alternative environments is well-recognized to promote reproductive isolation (RI) between lineages. However, most studies view each divergent environment as homogenous, thereby overlooking the potential role of within environment variation on RI between differentiating lineages. Here we test the importance of microenvironmental variation on RI using individual trees of two host plants each harboring locally adapted populations of the cynipid wasp, Belonocnema treatae. We compared the fitness surrogate (survival) of...

Repeated genetic and adaptive phenotypic divergence across tidal elevation in a foundation plant species

Robyn Zerebecki, Erik E Sotka, Torrance C Hanley, Katherine L. Bell, Catherine Gehring, Chris C. Nice, Christina L. Richards & A Randall Hughes
Microgeographic genetic divergence can create fine-scale trait variation. When such divergence occurs within foundation species, then it might impact community structure and ecosystem function, and cause other cascading ecological effects. We tested for parallel microgeographic trait and genetic divergence in Spartina alterniflora , a foundation species that dominates salt marshes of the US Atlantic and Gulf coasts. Spartina is characterized by tall-form (1-2m) plants at lower tidal elevations and short-form (<0.5m) plants at higher tidal...

Genotype and individual data for genetic structure in Louisiana Iris species reveals patterns of recent and historical admixture

Alexander Zalmat, Alex Sotola, Chris Nice & Noland Martin
Premise: When divergent lineages come into secondary contact reproductive isolation may be incomplete, thus providing an opportunity to investigate how speciation is manifested in the genome. The Louisiana Irises (Iris, series Hexagonae) comprise a group of three or more ecologically and reproductively divergent lineages that can produce hybrids where they come into contact. In this study we sought to estimate standing genetic variation to understand the current distribution of population structure in the Louisiana Irises....

Geographic patterns of genomic variation in the threatened Salado salamander, Eurycea chisholmensis

Chris Nice, James Fordyce, V. Alex Sotola, Justin Crow & Peter Diaz
Aquatic, karst and spring endemic organisms have become a focus of conservation efforts as human population densities and demand for groundwater increase. This is especially true of Texas salamanders in the genus Eurycea that have been the subject of investigations of patterns of genetic differentiation in order to understand their systematics and to inform conservation planning. Here we quantify patterns of population differentiation in the northern most species, Eurycea chisholmensis, the Salado salamander, which is...

Registration Year

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