Incubation temperature influences a suite of traits in avian offspring. However, the mechanisms underlying expression of these phenotypes are unknown. Given the importance of thyroid hormones in orchestrating developmental processes, we hypothesized that they may act as an upstream mechanism mediating the effects of temperature on hatchling phenotypic traits such as reduced growth and thermoregulation. We found that plasma T3, but not T4 concentrations, differed among newly-hatched wood ducks (Aix sponsa) from different embryonic incubation...
Data from: The rediscovery of a long described species reveals additional complexity in speciation patterns of poeciliid fishes in sulfide springsMaura Palacios, Lenin Arias-Rodrigues, Martin Plath, Constanze Eifert, Hannes Lerp, Anton Lamboj, Gary Voelker, Michael Tobler & Lenin Arias-Rodriguez
The process of ecological speciation drives the evolution of locally adapted and reproductively isolated populations in response to divergent natural selection. In Southern Mexico, several lineages of the freshwater fish species of the genus Poecilia have independently colonized toxic, hydrogen sulfide-rich springs. Even though ecological speciation processes are increasingly well understood in this system, aligning the taxonomy of these fish with evolutionary processes has lagged behind. While some sulfide spring populations are classified as ecotypes...
Data from: Gene transfer from bacteria and archaea facilitated evolution of an extremophilic eukaryoteGerald Schönknecht, Wei-Hua Chen, Chad M. Ternes, Guillaume G. Barbier, Roshan P. Shrestha, Mario Stanke, Andrea Bräutigam, Brett J. Baker, Jillian F. Banfield, R. Michael Garavito, Kevin Carr, Curtis Wilkerson, Stefan A. Rensing, David Gagneul, Nicholas E. Dickenson, Christine Oesterhelt, Martin J. Lercher & Andreas P. M. Weber
Some microbial eukaryotes, such as the extremophilic red alga Galdieria sulphuraria, can live in hot, toxic metal-rich, acidic environments. To elucidate the underlying molecular mechanisms of adaptation, we sequenced the 13.7 Mb genome of G. sulphuraria. This alga shows an enormous metabolic flexibility, growing either photoautotrophically or heterotrophically on more than 50 carbon sources. Environmental adaptation seems to have been facilitated by horizontal gene transfer from various bacteria and archaea, often followed by gene family...
Arbuscular mycorrhizal (AM) fungi are widespread root symbionts that often improve the fitness of their plant hosts. We tested whether local adaptation in mycorrhizal symbioses would shape the community structure of these root symbionts in a way that maximizes their symbiotic functioning. We grew a native prairie grass (Andropogon gerardii) with all possible combinations of soils and AM fungal inocula from three different prairies that varied in soil characteristics and disturbance history (two native prairie...
Data from: Genetic differentiation and selection against migrants in evolutionarily replicated extreme environmentsMartin Plath, Markus Pfenninger, Hannes Lerp, Rüdiger Riesch, Christoph Eschenbrenner, Patrick A. Slattery, David Bierbach, Nina Herrmann, Matthias Schulte, Lenin Arias-Rodriguez, Jeane Rimber Indy, Courtney N. Passow, Michael Tobler & Courtney Passow
We investigated mechanisms of reproductive isolation in livebearing fishes (genus Poecilia) inhabiting sulfidic and nonsulfidic habitats in three replicate river drainages. Although sulfide spring fish convergently evolved divergent phenotypes, it was unclear if mechanisms of reproductive isolation also evolved convergently. Using microsatellites, we found strongly reduced gene flow between adjacent populations from different habitat types, suggesting that local adaptation to sulfidic habitats repeatedly caused the emergence of reproductive isolation. Reciprocal translocation experiments indicate strong selection...
Oklahoma State University5
University of Michigan-Ann Arbor2
Goethe University Frankfurt2
Universidad Juárez Autónoma de Tabasco2
University of Greifswald1
Department of Plant Biology1
University of California, Berkeley1
Texas A&M University1
University of Freiburg1
Northern Arizona University1