43 Works

Data from: Bison body size and climate change

Jeff M. Martin, Jim I. Mead & Perry S. Barboza
The relationship between body size and temperature of mammals is poorly resolved, especially for large keystone species such as bison (Bison bison). Bison are well-represented in the fossil record across North America, which provides an opportunity to relate body size to climate within a species. We measured the length of a leg bone (calcaneal tuber, DstL) in 849 specimens from 60 localities that were dated by stratigraphy and 14C decay. We estimated body mass (M)...

Data from: Controls on yardang development and morphology II. Numerical modeling

Jon D. Pelletier
Here I present a set of mathematical modeling results, constrained by the results of the companion paper, aimed at improving our understanding of yardang development and controls on yardang morphology. The classic model for yardang development posits that yardangs evolve to an aspect ratio of ≈ 4 in order to minimize aerodynamic drag. Computational fluid dynamics (CFD) model results presented here, however, demonstrate that yardangs with an aspect ratio of 4 do not minimize drag....

Data from: Potential limits to the benefits of admixture during biological invasion

Brittany S. Barker, Janelle E. Cocio, Samantha R. Anderson, Joseph E. Braasch, F. Alice Cang, Heather D. Gillette & Katrina M. Dlugosch
Species introductions often bring together genetically divergent source populations, resulting in genetic admixture. This geographic reshuffling of diversity has the potential to generate favorable new genetic combinations, facilitating the establishment and invasive spread of introduced populations. Observational support for the superior performance of admixed introductions has been mixed, however, and the broad importance of admixture to invasion questioned. Under most underlying mechanisms, admixture’s benefits should be expected to increase with greater divergence among and lower...

Data from: A continent-scale test of multiple hypotheses on the abundances of Neotropical birds

David W. Kikuchi, Gustavo H. Kattan & Kimberly C. Navarro Velez
Explaining variation in the abundance of species remains a challenge in ecology. We sought to explain variation in abundance of Neotropical forest birds using a dataset of population densities of 596 species. We tested a priori hypotheses for the roles of species traits, environmental factors, and species interactions. Specifically, we focused on four factors: 1) body mass (trait); 2) habitat type (environmental factor), 3) net primary productivity (NPP; environmental factor); and 4) species richness of...

Data from: Bringing down the house: male widow spiders reduce the webs of aggressive females more

Nicholas DiRienzo, Charles T. Bradley, Connor A. Smith & A. Dornhaus
Theory suggests that males should adjust courtship in response to a variety of factors, including female quality, the risk of male-male competition, and often in spiders, the risk of sexual cannibalism. Male black widow spiders demonstrate a behavior during courtship whereby they tear down and bundle a female’s web in addition to providing other vibratory and contact sexual signals. This web reduction has been hypothesized to play a role in all three factors (sexual signaling,...

Data from: Environmentally-induced noise dampens and reddens with increasing trophic level in a complex food web

Anna Kuparinen, Tommi Perälä, Neo D. Martinez & Fernanda S. Valdovinos
Stochastic variability of key abiotic factors including temperature, precipitation and the availability of light and nutrients greatly influences species’ ecological function and evolutionary fate. Despite such influence, ecologists have typically ignored the effect of abiotic stochasticity on the structure and dynamics of ecological networks. Here we help to fill that gap by advancing the theory of how abiotic stochasticity, in the form of environmental noise, affects the population dynamics of species within food webs. We...

Data from: Genetic control of seed shattering during African rice domestication

Shuwei Lv, Wenguang Wu, Muhua Wang, Rachel S. Meyer, Marie-Noelle Ndjiondjop, Lubin Tan, Haiying Zhou, Jianwei Zhang, Yongcai Fu, Hongwei Cai, Chuanqing Sun, Rod A. Wing & Zuofeng Zhu
Domestication represents a unique opportunity to study the evolutionary process. The elimination of seed dispersal traits was a key step in the evolution of cereal crops under domestication. Here, we show that ObSH3, a YABBY transcription factor, is required for the development of the seed abscission layer. Moreover, selecting a genomic segment deletion containing SH3 resulted in the loss of seed dispersal in populations of African cultivated rice (Oryza glaberrima Steud.). Functional characterization of SH3...

Data from: Testing the role of climate in speciation: new methods and applications to squamate reptiles (lizards and snakes)

Tereza Jezkova & John J. Wiens
Climate may play important roles in speciation, such as causing the range fragmentation that underlies allopatric speciation (through niche conservatism) or driving divergence of parapatric populations along climatic gradients (through niche divergence). Here, we developed new methods to test the frequency of climate niche conservatism and divergence in speciation, and applied it to species pairs of squamate reptiles (lizards and snakes). We used a large-scale phylogeny to identify 242 sister-species pairs for analysis. From these,...

Data from: Adaptive diversification of growth allometry in the plant Arabidopsis thaliana

François Vasseur, Moises Exposito-Alonso, Oscar J. Ayala-Garay, George Wang, Brian J. Enquist, Denis Vile, Cyrille Violle & Detlef Weigel
Seed plants vary tremendously in size and morphology. However, variation and covariation between plant traits may at least in part be governed by universal biophysical laws and biological constants. Metabolic Scaling Theory (MST) posits that whole-organismal metabolism and growth rate are under stabilizing selection that minimizes the scaling of hydrodynamic resistance and maximizes the scaling of resource uptake. This constrains variation in physiological traits and in the rate of biomass accumulation, so that they can...

Data from: Dispersal is associated with morphological innovation, but not increased diversification, in Cyphostemma (Vitaceae)

David J. Hearn, Margaret Evans, Ben Wolf, Michael McGinty & Jun Wen
Multiple processes - including dispersal, morphological innovation, and habitat change - are frequently cited as catalysts for increased diversification. We investigate these processes and the causal linkages among them in the genus Cyphostemma (Vitaceae), a clade comprising ~200 species that is unique in the Vitaceae for its diversity of growth habits. We reconstruct time-calibrated evolutionary relationships among 64 species in the genus using five nuclear and chloroplast markers, and infer the group’s morphological and biogeographic...

Data from: Structural and defensive roles of angiosperm leaf venation network reticulation across an Andes-Amazon elevation gradient

Benjamin Blonder, Norma Salinas, Lisa Patrick Bentley, Alexander Shenkin, Percy Orlando Chambi Porroa, Yolvi Valdez Tejeira, Tatiana Erika Boza Espinoza, Gregory R. Goldsmith, Lucas Enrico, Roberta Martin, Gregory P. Asner, Sandra Díaz, Brian J. Enquist & Yadvinder Malhi
1.The network of minor veins of angiosperm leaves may include loops (reticulation). Variation in network architecture has been hypothesized to have hydraulic and also structural and defensive functions. 2.We measured venation network trait space in eight dimensions for 136 biomass-dominant angiosperm tree species along a 3,300 m elevation gradient in southeastern Peru. We then examined the relative importance of multiple ecological, and evolutionary predictors of reticulation. 3.Variation in minor venation network reticulation was constrained to...

Data from: Personality links with lifespan in chimpanzees

Drew M Altschul, William D Hopkins, Elizabeth S Herrelko, Miho Inoue-Murayama, Tetsuro Matsuzawa, James E King, Stephen R Ross & Alexander Weiss
Life-history strategies for optimizing individual fitness fall on a spectrum between maximizing reproductive efforts and maintaining physical health over time. Strategies across this spectrum are viable and different suites of personality traits have evolved to support these strategies. Using personality and survival data from 538 captive chimpanzees (Pan troglodytes) we tested whether any of the dimensions of chimpanzee personality - agreeableness, conscientiousness, dominance, extraversion, neuroticism, and openness - were associated with longevity, an attribute of...

Data from: What caused over a century of decline in general intelligence? Testing predictions from the genetic selection and neurotoxin hypotheses

Michael A. Woodley Of Menie, Matthew A. Sarraf, Mateo Peñaherrera-Aguirre, Heitor B.F. Fernandes & David Becker
Several converging lines of evidence indicate that general intelligence (g) has declined in Western populations. The causes of these declines are debated. Here, two hypotheses are tested: (1) selection acting against genetic variants that promote g causes the decline and (2) the presence of neurotoxic pollution in the environment causes the decline. A linear mixed model was devised to test (1) and (2), in which the secular decline in a “heritable g” (g.h) chronometric factor...

Data from: An evaluation of transferability of ecological niche models

Huijie Qiao, Xiao Feng, Luis E. Escobar, A. Townsend Peterson, Jorge Soberon, Gengping Zhu & Monica Papeș
Ecological niche modeling (ENM) is used widely to study species’ geographic distributions. ENM applications frequently involve transferring models calibrated with environmental data from one region to other regions or times that may include novel environmental conditions. When novel conditions are present, transferability implies extrapolation, whereas, in absence of such conditions, transferability is an interpolation step only. We evaluated transferability of models produced using 11 ENM algorithms from the perspective of interpolation and extrapolation in a...

Data from: The E3 ubiquitin ligase MARCH1 regulates glucose-tolerance and lipid storage in a sex-specific manner

Candida Bhagwandin, Erin L. Ashbeck, Michael Whalen, Joanna Bandola-Simon, Paul A. Roche, Adam Szajman, Sarah Mai Truong, Betsy C. Wertheim, Yann C. Klimentidis, Satoshi Ishido, Benjamin J. Renquist & Lonnie Lybarger
Type 2 diabetes is typified by insulin-resistance in adipose tissue, skeletal muscle, and liver, leading to chronic hyperglycemia. Additionally, obesity and type 2 diabetes are characterized by chronic low-grade inflammation. Membrane-associated RING-CH-1 (MARCH1) is an E3 ubiquitin ligase best known for suppression of antigen presentation by dendritic and B cells. MARCH1 was recently found to negatively regulate the cell surface levels of the insulin receptor via ubiquitination. This, in turn, impaired insulin sensitivity in mouse...

Data from: Inferring introgression using RADseq and DFOIL: power and pitfalls revealed in a case study of spiny lizards (Sceloporus)

Shea M. Lambert, Jeffrey W. Streicher, M. Caitlin Fisher-Reid, Fausto R. Mendez De La Cruz, Norberto Martínez‐Méndez, Uri Omar García Vázquez, Adrián Nieto Montes De Oca & John J. Wiens
Introgression is now commonly reported in studies across the Tree of Life, aided by recent advancements in data collection and analysis. Nevertheless, researchers working with non‐model species lacking reference genomes may be stymied by a mismatch between available resources and methodological demands. In this study, we demonstrate a fast and simple approach for inferring introgression using RADseq data, and apply it to a case study involving spiny lizards (Sceloporus) from northeastern México. First, we find...

Data from: Juvenile social experience generates differences in behavioral variation but not averages

Nicholas DiRienzo, J. Chadwick Johnson & Anna Dornhaus
Developmental plasticity is known to influence the mean behavioral phenotype of a population. Yet, studies on how developmental plasticity shapes patterns of variation within populations are comparatively rare and often focus on a subset of developmental cues (e.g. nutrition). One potentially important but understudied developmental experience is social experience, as it is explicitly hypothesized to increase variation among individuals as a way to promote ‘social niches.’ To test this we exposed juvenile black widow spiders...

Data from: Crop pests and predators exhibit inconsistent responses to surrounding landscape composition

Daniel S. Karp, Rebecca Chaplin-Kramer, Timothy D. Meehan, Emily A. Martin, Fabrice DeClerck, Heather Grab, Claudio Gratton, Lauren Hunt, Ashley E. Larsen, Alejandra Martínez-Salinas, Megan E. O’Rourke, Adrien Rusch, Katja Poveda, Mattias Jonsson, Jay A. Rosenheim, Nancy A. Schellhorn, Teja Tscharntke, Stephen D. Wratten, Wei Zhang, Aaron L. Iverson, Lynn S. Adler, Matthias Albrecht, Audrey Alignier, Gina M. Angelella, Muhammad Zubair Anjum … & Yi Zou
The idea that noncrop habitat enhances pest control and represents a win–win opportunity to conserve biodiversity and bolster yields has emerged as an agroecological paradigm. However, while noncrop habitat in landscapes surrounding farms sometimes benefits pest predators, natural enemy responses remain heterogeneous across studies and effects on pests are inconclusive. The observed heterogeneity in species responses to noncrop habitat may be biological in origin or could result from variation in how habitat and biocontrol are...

Data from: Age‐dependent leaf physiology and consequences for crown‐scale carbon uptake during the dry season in an Amazon evergreen forest

Loren P. Albert, Jin Wu, Neill Prohaska, Plinio Barbosa De Camargo, Travis E. Huxman, Edgard S. Tribuzy, Valeriy Y. Ivanov, Rafael S. Oliveira, Sabrina Garcia, Marielle N. Smith, Raimundo Cosme Oliveira Junior, Natalia Restrepo-Coupe, Rodrigo Da Silva, Scott C. Stark, Giordane A. Martins, Deliane V. Penha & Scott R. Saleska
* Satellite and tower-based metrics of forest-scale photosynthesis generally increase with dry season progression across central Amazônia, but the underlying mechanisms lack consensus. * We conducted demographic surveys of leaf age composition, and measured age-dependence of leaf physiology in broadleaf canopy trees of abundant species at a central eastern Amazon site. Using a novel leaf-to-branch scaling approach, we used this data to independently test the much-debated hypothesis—arising from satellite and tower-based observations—that leaf phenology could...

Data from: Grazing effect on grasslands escalated by abnormal precipitations in Inner Mongolia

Maowei Liang, Jiquan Chen, Elise S. Gornish, Zhiyong Li, Xue Bai & Cunzhu Liang
1. Grazing effects on arid and semi-arid grasslands can be constrained by aridity. Plant functional groups (PFGs) are the most basic component of community structure (CS) and biodiversity & ecosystem function (BEF). They have been suggested as identity-dependent in quantifying the responses to grazing intensity and drought severity. Here we examine how the relationships among PFGs, CS, BEF, and grazing intensity are driven by climatic drought. 2. We conducted a manipulative experiment with three grazing...

Data from: Hydrological niche segregation defines forest structure and drought tolerance strategies in a seasonal Amazon forest

Mauro Brum, Matthew A. Vadeboncoeur, Valeriy Ivanov, Heidi Asbjornsen, Scott Saleska, Luciana F. Alves, Deliane Penha, Jadson D. Dias, Luiz E.O.C. Aragão, Fernanda Barros, Paulo Bittencourt, Luciano Pereira & Rafael S. Oliveira
1) Understanding if and how trees coordinate rooting depth and aboveground hydraulic traits to define drought-resistance strategies in seasonal Amazon forests is a major gap to model parametrization aimed at predicting the effects of climate change in these ecosystems. 2) We assessed the rooting depth of 12 dominant tree species (representing ~ 42% of the forest basal area) in a seasonal Amazon forest, using the stable isotope ratios (δ18O and δ²H) of water collected from...

Data from: Experimental warming in the field delays phenology and reduces body mass and survival: implications for the persistence of a pollinator under climate change

Paul J. CaraDonna, James L. Cunningham & Amy M. Iler
1. Climate change is rapidly altering thermal environments across the globe. The effects of increased temperatures in already warm environments may be particularly strong because organisms are likely to be near their thermal safety margins, with limited tolerance to additional heat stress. 2. We conduct an in situ field experiment over two years to investigate the direct effects of temperature on an early-season solitary bee in a warm, arid region of the Southwestern USA. Our...

Data from: Extensive phenotypic diversification coexists with little genetic divergence and a lack of population structure in the White Wagtail subspecies complex (Motacilla alba)

Georgy A. Semenov, Evgeniy A. Koblik, Yaroslav A. Red'kin & Alexander V. Badyaev
Geographically clustered phenotypes often demonstrate consistent patterns in molecular markers, particularly mitochondrial DNA (mtDNA) traditionally used in phylogeographic studies. However distinct evolutionary trajectories among traits and markers can lead to their discordance. First, geographic structure in phenotypic traits and nuclear molecular markers can be co-aligned but inconsistent with mtDNA (mito-nuclear discordance). Alternatively, phenotypic variation can have little to do with patterns in neither mtDNA nor nuclear markers. Disentangling between these distinct patterns can provide insight...

Data from: Why are some plant—nectar robber interactions commensalisms?

Jacob M. Heiling, Trevor A. Ledbetter, Sarah K. Richman, Heather K. Ellison, Judith L. Bronstein & Rebecca E. Irwin
Many plants that bear hidden or recessed floral nectar experience nectar robbing, the removal of nectar by a floral visitor through holes pierced in the corolla. Although robbing can reduce plant reproductive success, many studies fail to find such effects. We outline three mechanistic hypotheses that can explain when interactions between plants and nectar-robbers should be commensilistic rather than antagonistic: the non-discrimination (pollinators do not avoid robbed flowers), visitor prevalence (robber visitation is rare relative...

Data from: Predictable gene expression related to behavioral variation in parenting

Kyle M. Benowitz, Elizabeth C. McKinney, Christopher B. Cunningham & Allen J. Moore
Differential gene expression has been associated with transitions between behavioral states for a wide variety of organisms and behaviors. Heterochrony, genetic toolkits, and predictable pathways underlying behavioral transitions have been hypothesized to explain the relationship between transcription and behavioral changes. Less studied is how variation in transcription is related to variation within a behavior, and if the genes that are associated with this variation are predictable. Here we adopt an evolutionary systems biology perspective to...

Registration Year

  • 2018

Resource Types

  • Dataset


  • University of Arizona
  • University of Michigan-Ann Arbor
  • Virginia Tech
  • University of Sao Paulo
  • University of California Los Angeles
  • University of Kansas
  • Duke University
  • University of Georgia
  • National Institute for Environmental Studies
  • Arizona State University