20 Works

Data from: Can the genomics of ecological speciation be predicted across the divergence continuum from host races to species? A case study in Rhagoletis

Meredith M. Doellman, Peter J. Meyers, Gregory J. Ragland, Glen R. Hood, Scott P. Egan, Thomas H. Q. Powell, Patrik Nosil & Jeffrey L. Feder
Studies assessing the predictability of evolution typically focus on short-term adaptation within populations or the repeatability of change among lineages. A missing consideration in speciation research is to determine whether natural selection predictably transforms standing genetic variation within populations into differences between species. Here, we test whether host-related selection on diapause timing anticipates genome-wide differentiation during ecological speciation by comparing ancestral hawthorn and newly formed apple-infesting host races of Rhagoletis pomonella to their sibling species...

Data from: Zooming in on mechanistic predator-prey ecology: integrating camera traps with experimental methods to reveal the drivers of ecological interactions

Justine Smith, Justin Suraci, Jennifer Hunter, Kaitlyn Gaynor, Carson Keller, Meredith Palmer, Justine Atkins, Irene Castañeda, Michael Cherry, Patrick Garvey, Sarah Huebner, Dana Morin, Lisa Teckentrup, Martijn Weterings & Lydia Beaudrot
1. Camera trap technology has galvanized the study of predator-prey ecology in wild animal communities by expanding the scale and diversity of predator-prey interactions that can be analyzed. While observational data from systematic camera arrays have informed inferences on the spatiotemporal outcomes of predator-prey interactions, the capacity for observational studies to identify mechanistic drivers of species interactions is limited. 2. Experimental study designs that utilize camera traps uniquely allow for testing hypothesized mechanisms that drive...

Ant community dynamics in the Big Thicket National Preserve of east Texas

Thomas Miller & Scott Solomon
Rare and extreme climatic events can leave important but difficult-to-study legacies for ecological communities. Theory suggests that the relative abundance and even presence of species in communities may be driven as much by historical contingencies associated with rare events as by filtering from average environmental conditions. Much of what we know about the consequences of extreme events comes from opportunistic studies, where ecologists were in the right place at the right time. Climate change forecasts...

Data-driven models reveal mutant cell behaviors important for myxobacterial aggregation

Oleg Igoshin, Zhaoyang Zhang, Christopher R. Cotter, Lawrence J. Shimkets & Zhe Lyu
Single mutations frequently alter several aspects of cell behavior but rarely reveal whether a particular statistically significant change is biologically significant. To determine which behavioral changes are most important for multicellular self-organization, we devised a new methodology using Myxococcus xanthus as a model system. During development, myxobacteria coordinate their movement to aggregate into spore-filled fruiting bodies. We investigate how aggregation is restored in two mutants, csgA and pilC, that cannot aggregate unless mixed with wild...

Within-host priority effects and epidemic timing determine outbreak severity in coinfected populations

Patrick Clay, Meghan Duffy & Volker Rudolf
Coinfections of hosts by multiple pathogen species are ubiquitous, but predicting their impact on disease remains challenging. Interactions between coinfecting pathogens within hosts can alter pathogen transmission, with the impact on transmission typically dependent on the relative arrival order of pathogens within hosts (within-host priority effects). However, it is unclear how these within-host priority effects influence multi-pathogen epidemics, particularly when the arrival order of pathogens at the host population scale varies. Here we combined models...

Herbivory of a biocontrol agent on a native plant causes an indirect trait-mediated non-target effect on a native insect

Minyan He, Jialiang Zhang, Evan Siemann, Jiahui Yi, Wenchao Qin, Xiao Sun, Jianqing Ding & Wei Huang
Identifying food web linkages between biocontrol agents of invasive plants and native species is crucial for predicting indirect non-target effects. Biocontrol insects can integrate into food webs within recipient habitats and influence native insects through apparent competition (altering shared natural enemies) or density-mediated exploitation competition (changing density of native plants). However, whether and how trait-mediated exploitation competition (modifying native plant chemical defenses and volatiles profiles) can produce indirect non-target effects remains largely overlooked, despite plant...

Data from: Genotype-by-genotype epistasis for exploratory behavior in D. simulans

Julia Saltz, Allison Jaffe & Madeline Burns
Social interactions can influence the expression and underlying genetic basis of many traits. Yet, empirical investigations of indirect genetic effects (IGEs) and genotype-by-genotype epistasis—quantitative genetics parameters representing the role of genetic variation in a focal individual and its interacting partners in producing the observed trait values—are still scarce. Studying this social plasticity is notoriously challenging when individuals interact in groups, rather than (simpler) dyads. Here, we investigate the genetic architecture of social plasticity for exploratory...

Functional diversity and redundancy of tropical forest mammals over time

Daniel Gorczynski & L. Beaudrot.
Globally, tropical rain forests comprise some of the most diverse and functionally rich ecosystems but are increasingly degraded by human impacts. Protected areas have been shown to conserve species diversity, but their effectiveness at maintaining functional diversity over time is less well known, despite the fact that functional diversity likely reveals more ecological information than taxonomic diversity. By extension, the degree to which species loss decreases functional diversity within protected areas is also unknown; functional...

Genomic evidence for correlated trait combinations and antagonistic selection contributing to counterintuitive genetic patterns of adaptive diapause divergence in Rhagoletis flies

McCall Calvert, Meredith Doellman, Jeffrey Feder, Glenn Hood, Peter Meyers, Scott Egan, Thomas Powell, Mary Glover, Cheyenne Tait, Hannes Schuler, Stewart Berlocher, James Smith, Patrik Nosil, Dan Hahn & Gregory Ragland
Adaptation to novel environments often results in unanticipated genomic responses to selection. Here, we illustrate how multifarious, correlational selection helps explain a counterintuitive pattern of genetic divergence between the recently derived apple- and ancestral hawthorn-infesting host races of Rhagoletis pomonella (Diptera: Tephritidae). The Apple host race terminate diapause and emerge as adults earlier in the season than the hawthorn host race to coincide with the earlier fruiting phenology of their apple hosts. However, alleles at...

Asymmetric, but opposing reductions in immigrant viability and fecundity promote reproductive isolation among host-associated populations of an insect herbivore

Linyi Zhang, Glen Hood, Amy Roush, Shihan Shzu, Mattheau Comerford, James Ott & Scott Egan
Immigrant inviability can contribute to reproductive isolation (RI) during ecological speciation by reducing the survival of immigrants in non-native environments. However, studies that assess the fitness consequence of immigrants moving from native to non-native environments typically fail to explore the potential role of concomitant reductions in immigrant fecundity despite recent evidence suggesting its prominent role during local adaptation. Here, we evaluate the directionality and magnitude of both immigrant viability and fecundity to RI in a...

Context-dependent variability in the population prevalence and individual fitness effects of plant-fungal symbiosis

Marion Donald, Teresa Bohner, Kory Kolis, Alan Shadow, Jennifer Rudgers & Tom Miller
1. Heritable symbionts, found within a diverse array of flora and fauna, are often observed at intermediate prevalence within host populations, despite expectations that positive fitness feedbacks should drive beneficial symbionts to fixation. Intermediate prevalence may reflect neutral dynamics of symbionts with weak fitness effects, transient dynamics of symbionts trending toward fixation (or elimination), or a stable intermediate outcome determined by the balance of fitness effects and failed symbiont transmission. Theory suggests these outcomes should...

Interview between Lesli Vollrath and Salise Shuttlesworth

Lesli Vollrath

Increasing flavonoid concentrations in root exudates enhance associations between arbuscular mycorrhizal fungi and an invasive plant

Baoliang Tian, Yingchun Pei, Wei Huang, Jianqing Ding & Evan Siemann
Many invasive plants have enhanced mutualistic arbuscular mycorrhizal (AM) fungal associations, however, mechanisms underlying differences in AM fungal associations between introduced and native populations of invasive plants have not been explored. Here we test the hypothesis that variation in root exudate chemicals in invasive populations affects AM fungal colonization and then impacts plant performance. We examined flavonoids (quercetin and quercitrin) in root exudates of native and introduced populations of the invasive plant Triadica sebifera and...

Data from: Evidence for spatial clines and mixed geographic modes of speciation for North American cherry-infesting Rhagoletis (Diptera:Tephritidae) flies

Meredith Doellman, Gilbert Saint Jean, Scott Egan, Thomas Powell, Glen Hood, Hannes Schuler, Daniel Bruzzese, Mary Glover, James Smith, Wee Yee, Robert Goughnour, Juan Rull, Martin Aluja & Jeffrey Feder
An important criterion for understanding speciation is the geographic context of population divergence. Three major modes of allopatric, parapatric, and sympatric speciation define the extent of spatial overlap and gene flow between diverging populations. However, mixed modes of speciation are also possible, whereby populations experience periods of allopatry, parapatry, and/or sympatry at different times as they diverge. Here, we report clinal patterns of variation for 21 nuclear-encoded microsatellites and a wing spot phenotype for cherry-infesting...

Data from: Maximum parsimony inference of phylogenetic networks in the presence of polyploid complexes

Luay Nakhleh, Zhi Yan, Zhen Cao & Yushu Liu
Phylogenetic networks provide a powerful framework for modeling and analyzing reticulate evolutionary histories. While polyploidy has been shown to be prevalent not only in plants but also in other groups of eukaryotic species, most work done thus far on phylogenetic network inference assumes diploid hybridization. These inference methods have been applied, with varying degrees of success, to data sets with polyploid species, even though polyploidy violates the mathematical assumptions underlying these methods. Statistical methods were...

Data from: Probing the ecology and climate of the Eocene Southern Ocean with sand tiger sharks Striatolamia macrota

Sora Kim, Sarah Zeichner, Albert Colman, Howie Scher, Jürgen Kriwet & Thomas Mörs
During the Eocene, the Earth climate system transitioned from greenhouse to icehouse conditions. Central to many explanations is the Southern Ocean—where tectonic configurations influenced oceanic gateways, ocean circulation reduced heat transport, and/or greenhouse gas declines prompted glaciation. To date, few studies have explored the implications of this climate transition on high latitude, marine vertebrates. Seymour Island near the Antarctic Peninsula preserves a rich, diverse fossil assemblage in the Tertiary Eocene La Meseta (TELM) Formation (Fm)....

Habitat complexity dampens selection on prey activity level

Carl Keiser, Spencer Ingley, Benjamin Toscano, Inon Scharf & Jonathan Pruitt
Conspecific prey individuals often exhibit persistent differences in behavior (i.e., animal personality) and consequently vary in their susceptibility to predation. How this form of selection varies across environmental contexts is essential to predicting ecological and evolutionary dynamics, yet remains currently unresolved. Here, we use three separate predator–prey systems (sea star–snail, wolf spider–cricket, and jumping spider–cricket) to independently examine how habitat structural complexity influences the selection that predators impose on prey behavioral types. Prior to conducting...

Host identity and symbiotic association affects the genetic and taxonomic diversity of the clownfish-hosting sea anemone microbiome

Benjamin Titus, Robert Laroche, Estafania Rodriguez, Herman Wirshing & Christopher Meyer
All eukaryotic life engages in symbioses with a diverse community of bacteria that are essential for performing basic life functions. In many cases, eukaryotic organisms form additional symbioses with other macroscopic eukaryotes. The tightly-linked physical interactions that characterize many macroscopic symbioses creates opportunities for microbial transfer, which likely affects the diversity and function of individual microbiomes, and may ultimately lead to microbiome convergence between distantly related taxa. Here, we sequence the microbiomes of five species...

Local extinction risk under climate change in a neotropical asymmetrically dispersed epiphyte

Miguel Acevedo, Lydia Beaudrot, Elvia Melendez-Ackerman & Raymond Tremblay
1. The long-term fate of populations experiencing disequilibrium conditions with their environment will ultimately depend on how local colonization and extinction dynamics respond to abiotic conditions (e.g. temperature and rainfall), dispersal limitation and biotic interactions (e.g. competition, facilitation, or interactions with natural enemies). Understanding how these factors influence distributional dynamics under climate change is a major knowledge gap, particularly for small ranged and dispersal-limited plant species, which are at higher risk of extinction. Epiphytes are...

Trade-off between fecundity and survival generates stabilizing selection on gall size

Scott Egan, Amanda Weaver, Glen Hood & Michael Foster
Complex interactions within multi-trophic communities are fundamental to the evolution of individual species that reside within them. One common outcome of species interactions are fitness trade-offs, where traits adaptive in some circumstances are maladaptive in others. Here, we identify a fitness trade-off between fecundity and survival in the cynipid wasp Callirhytis quercusbatatoides that induces multi-chambered galls on the stem of its host plant Quercus virginiana. We first quantified this trade-off in natural populations by documenting...

Registration Year

  • 2020
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Resource Types

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Affiliations

  • Rice University
    20
  • Wayne State University
    5
  • Binghamton University
    3
  • University of Notre Dame
    3
  • University of Florida
    3
  • Henan University
    2
  • Free University of Bozen-Bolzano
    2
  • United States Department of Agriculture
    2
  • University of Colorado Denver
    2
  • Michigan State University
    2