6 Works

Phenotypic divergence among threespine stickleback that differ in nuptial coloration

Clara Jenck, Whitley Lehto, Brian Ketterman, Lukas Sloan, Aaron Sexton & Robin Tinghitella
By studying systems in their earliest stages of differentiation, we can learn about the evolutionary forces acting within and among populations and how those forces could contribute to reproductive isolation. Such an understanding would help us better discern and predict how selection leads to the maintenance of multiple morphs within a species, rather than speciation. The postglacial adaptive radiation of the threespine stickleback (Gasterosteus aculeatus) is one of the best-studied cases of evolutionary diversification and...

Small fish, large river: surprisingly minimal genetic structure in a dispersal-limited, habitat specialist fish

Brooke Washburn
Genetic connectivity is expected to be lower in species with limited dispersal ability and a high degree of habitat specialization (intrinsic factors). Also, gene flow is predicted to be limited by habitat conditions such as physical barriers and geographic distance (extrinsic factors). We investigated the effects of distance, intervening pools, and rapids on gene flow in a species, the Tuxedo Darter (Etheostoma lemniscatum), a habitat specialist that is presumed to be dispersal-limited. We predicted that...

Data from: The ecological stage changes benefits of mate choice and drives preference divergence

Robin Tinghitella, Alycia Lackey, Catherine Durso, Jennifer Koop & Janette Boughman
Preference divergence is thought to contribute to reproductive isolation. Ecology can alter the way selection acts on female preferences, making them most likely to diverge when ecological conditions vary among populations. We present a novel mechanism for ecologically dependent sexual selection, termed ‘the ecological stage’ to highlight its ecological dependence. Our hypothesized mechanism emphasizes that males and females interact over mating in a specific ecological context, and different ecological conditions change the costs and benefits...

Data from: Anthropogenic noise reduces male reproductive investment in an acoustically signaling insect

Robin Tinghitella, Anne Bowen & Gabrielle Gurule-Small
Rapidly changing environments impose novel selection pressures on organisms, and sometimes adaptive phenotypic plasticity allows organisms to survive and reproduce in the face of environmental change. However, plastic responses can also be maladaptive. In this study, we investigate whether male reproductive investment responds plastically to varied experience with traffic noise. We exposed male crickets chronically to one of three noise treatments from the 2nd-3rdinstar until their natural death: masking traffic noise (including noise that overlaps...

Predator population size structure alters consumption of prey from epigeic and grazing food webs

Shannon Murphy, Danny Lewis & Gina Wimp
Numerous studies have found that predators can suppress prey densities and thereby impact important ecosystem processes such as plant productivity and decomposition. However, prey suppression by spiders can be highly variable. Unlike predators that feed on prey within a single energy channel, spiders often consume prey from asynchronous energy channels, such as grazing (live plant) and epigeic (soil surface) channels. Spiders undergo few life cycle changes and thus appear to be ideally suited to link...

Isotopic evidence for long-distance connections of the AD thirteenth century Promontory caves occupants

Jessica Metcalfe, John Ives, Sabrina Shirazi, Kevin Gilmore, Jennifer Hallson, Fiona Brock, Bonnie Clark & Beth Shapiro
The Promontory caves (Utah) and Franktown Cave (Colorado) contain high-fidelity records of short-term occupations by groups with material culture connections to the Subarctic/Northern Plains. This research uses Promontory and Franktown bison dung, hair, hide, and bone collagen to establish local baseline carbon isotopic variability and identify leather from a distant source. The ankle wrap of one Promontory Cave 1 moccasin had a δ13C value that indicates a substantial C4 component to the animal’s diet, unlike...

Registration Year

  • 2020

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