13 Works

Data from: A test of genomic modularity among life-history adaptations promoting speciation with gene flow

Gregory Ragland, Meredith M. Doellman, Peter J. Meyers, Glen R. Hood, Scott P. Egan, Thomas H. Q. Powell, Daniel A. Hahn, Patrik Nosil, Jeffrey L. Feder & Gregory J. Ragland
Speciation with gene flow may require adaptive divergence of multiple traits to generate strong ecologically based reproductive isolation. Extensive negative pleiotropy or physical linkage of genes in the wrong phase affecting these diverging traits may therefore hinder speciation, while genetic independence or “modularity” among phenotypic traits may reduce constraints and facilitate divergence. Here, we test whether the genetics underlying two components of diapause life history, initial diapause intensity and diapause termination timing, constrain differentiation between...

Data from: Queen presence mediates the relationship between collective behavior and disease susceptibility in ant colonies

Carl N. Keiser, Svjetlana Vojvodic, Imani O. Butler, Elizabeth Sartain, Volker H. W. Rudolf & Julia B. Saltz
The success of social living can be explained, in part, by a group's ability to execute collective behaviors unachievable by solitary individuals. However, groups vary in their ability to execute these complex behaviors, often because they vary in their phenotypic composition. Group membership changes over time due to mortality or emigration, potentially leaving groups vulnerable to ecological challenges in times of flux. In some societies, the loss of important individuals (e.g., leaders, elites, queens) may...

Data from: Tales from the crypt: a parasitoid manipulates the behaviour of its parasite host

Kelly L. Weinersmith, Sean M. Liu, Andrew A. Forbes & Scott P. Egan
There are many examples of apparent manipulation of host phenotype by parasites, yet few examples of hypermanipulation—where a phenotype-manipulating parasite is itself manipulated by a parasite. Moreover, few studies confirm manipulation is occurring by quantifying whether the host's changed phenotype increases parasite fitness. Here we describe a novel case of hypermanipulation, in which the crypt gall wasp Bassettia pallida (a phenotypic manipulator of its tree host) is manipulated by the parasitoid crypt-keeper wasp Euderus set,...

Data from: Coestimating reticulate phylogenies and gene trees from multilocus sequence data

Dingqiao Wen & Luay Nakhleh
The multispecies network coalescent (MSNC) is a stochastic process that captures how gene trees grow within the branches of a phylogenetic network. Coupling the MSNC with a stochastic mutational process that operates along the branches of the gene trees gives rise to a generative model of how multiple loci from within and across species evolve in the presence of both incomplete lineage sorting (ILS) and reticulation (e.g., hybridization). We report on a Bayesian method for...

Data from: Can't live with them, can't live without them? Balancing mating and competition in two-sex populations

Aldo Compagnoni, Kenneth Steigman & Tom E. X. Miller
Two-sex populations are usually studied through frequency-dependent models that describe how sex ratio affects mating, recruitment, and population growth. However, in two-sex populations, mating and recruitment should also be affected by density and by its interactions with sex ratio. Density may have positive effects on mating (Allee effects) but negative effects on other demographic processes. In this study, we quantified how positive and negative inter-sexual interactions balance in two-sex populations. Using a dioecious grass (Poa...

Data from: Edge effects on components of diversity and above-ground biomass in a tropical rainforest

Onja H. Razafindratsima, Kerry A. Brown, Fabio Carvalho, Steig E. Johnson, Patricia C. Wright & Amy E. Dunham
1. Edge effects are among the most significant consequences of forest fragmentation. Therefore, understanding the impacts of edge creation on biodiversity is crucial for forest management and biological conservation. 2. In this study, we used trait-based and phylogenetic approaches to examine the effects of fragmentation on components of diversity and above-ground biomass of rainforest tree communities in Madagascar in forest edge vs. interior habitats. 3. Tree communities in forest edges showed lower phylogenetic diversity relative...

Data from: Reconstructing Asian faunal introductions to eastern Africa from multi-proxy biomolecular and archaeological datasets

Mary E. Prendergast, Michael Buckley, Alison Crowther, Heidi Eager, Laurent Frantz, Ophélie Lebrasseur, Rainer Hutterer, Ardern Hulme-Beaman, Wim Van Neer, Katerina Douka, Margaret-Ashley Veall, Eréndira M. Quintana Morales, Verena J. Schuenemann, Ella Reiter, Richard Allen, Evangelos A. Dimopoulos, Richard M. Helm, Ceri Shipton, Ogeto Mwebi, Christiane Denys, Mark C. Horton, Stephanie Wynne-Jones, Jeffrey Fleisher, Chantal Radimilahy, Henry Wright … & Mark Horton
Human-mediated biological exchange has had global social and ecological impacts. In sub-Saharan Africa, several domestic and commensal animals were introduced from Asia in the pre-modern period; however, the timing and nature of these introductions remain contentious. One model supports introduction to the eastern African coast after the mid-first millennium CE, while another posits introduction dating back to 3000 BCE. These distinct scenarios have implications for understanding the emergence of long-distance maritime connectivity, and the ecological...

Data from: Diflunisal inhibits prestin by chloride-dependent mechanism

Guillaume Duret, Fred A. Pereira & Robert M. Raphael
The motor protein prestin is a member of the SLC26 family of anion antiporters and is essential to the electromotility of cochlear outer hair cells and for hearing. The only direct inhibitor of electromotility and the associated charge transfer is salicylate, possibly through direct interaction with an anion-binding site on prestin. In a screen to identify other inhibitors of prestin activity, we explored the effect of the non-steroid anti-inflammatory drug diflunisal, which is a derivative...

Data from: Resolving biological impacts of multiple heat waves: interaction of hot and recovery days

Chun-Sen Ma, Lin Wang, Wei Zhang & Volker H. W. Rudolf
Heat waves are increasing with global warming and have more dramatic biological effects on organisms in natural and agricultural ecosystems than mean temperature increase. However, predicting the impact of future heat waves on organisms and ecosystems is challenging because we still have a limited understanding of how the different components that characterize heat waves interact. Here we take an experimental approach to examine the individual and combine consequences of two important features that characterize heat...

Data from: Density dependence in demography and dispersal generates fluctuating invasion speeds

Lauren L. Sullivan, Bingtuan Li, Tom E. X. Miller, Michael G. Neubert & Allison K. Shaw
Density dependence plays an important role in population regulation and is known to generate temporal fluctuations in population density. However, the ways in which density dependence affects spatial population processes, such as species invasions, are less understood. Although classical ecological theory suggests that invasions should advance at a constant speed, empirical work is illuminating the highly variable nature of biological invasions, which often exhibit nonconstant spreading speeds, even in simple, controlled settings. Here, we explore...

Data from: The palaeogenetics of cat dispersal in the ancient world

Claudio Ottoni, Wim Van Neer, Bea De Cupere, Julien Daligault, Silvia Guimaraes, Joris Peters, Nikolai Spassov, Mary E. Prendergast, Nicole Boivin, Arturo Morales-Muñiz, Adrian Bălăşescu, Cornelia Becker, Norbert Benecke, Adina Boroneant, Hijlke Buitenhuis, Jwana Chahoud, Alison Crowther, Laura Llorente, Nina Manaseryan, Hervé Monchot, Vedat Onart, Marta Osypińska, Olivier Putelat, Eréndira M. Quintana Morales, Jacqueline Studer … & Eva-Maria Geigl
The cat has long been important to human societies as a pest-control agent, object of symbolic value and companion animal, but little is known about its domestication process and early anthropogenic dispersal. Here we show, using ancient DNA analysis of geographically and temporally widespread archaeological cat remains, that both the Near Eastern and Egyptian populations of Felis silvestris lybica contributed to the gene pool of the domestic cat at different historical times. While the cat’s...

Data from: Top predators determine how biodiversity is partitioned across time and space

Benjamin G. Van Allen, Nick L. Rasmussen, Christopher J. Dibble, Patrick A. Clay, Volker H.W. Rudolf & Volker H. W. Rudolf
Natural ecosystems are shaped along two fundamental axes, space and time, but how biodiversity is partitioned along both axes is not well understood. Here, we show that the relationship between temporal and spatial biodiversity patterns can vary predictably according to habitat characteristics. By quantifying seasonal and annual changes in larval dragonfly communities across a natural predation gradient we demonstrate that variation in the identity of top predator species is associated with systematic differences in spatio-temporal...

Data from: The index case is not enough: variation among individuals, groups, and social networks modify bacterial transmission dynamics

Carl N. Keiser, Noa Pinter-Wollman, Michael J. Ziemba, Krishna S. Kothamasu & Jonathan N. Pruitt
1.The traits of the index case of an infectious disease outbreak, and the circumstances for their etiology, potentially influence the trajectory of transmission dynamics. However, these dynamics likely also depend on the traits of the individuals with whom the index case interacts. 2.We used the social spider Stegodyphus dumicola to test how the traits of the index case, group phenotypic composition, and group size interact to facilitate the transmission of a GFP-labeled cuticular bacterium. We...

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  • Rice University
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