64 Works

Host heterogeneity mitigates virulence evolution

P. Signe White, Angela Choi, Rishika Pandey, Arthur Menezes, McKenna Penley, Amanda Gibson, Jacobus De Roode, Levi Morran & Amanda K. Gibson
Parasites often infect genetically diverse host populations, and the evolutionary trajectories of parasite populations may be shaped by levels of host heterogeneity. Mixed genotype host populations, compared to homogeneous host populations, can reduce parasite prevalence and potentially reduce rates of parasite adaptation due to tradeoffs associated with adapting to specific host genotypes. Here, we used experimental evolution to select for increased virulence in populations of the bacterial parasite Serratia marcescens exposed to either heterogenous or...

Data supporting Food web complexity weakens size-based constraints on the pyramids of life

C. Brock Woodson
Marine ecosystems are generally expected to have bottom-heavy trophic structure (more plants than animals) due to size-based constraints arising from increased metabolic requirements and inefficient energy transfer. However, size-based (allometric) approaches are often limited to confined trophic level windows where energy transfer is predicted by size alone, and are constrained to bottom-up control at steady state. In real food webs, energy flow is more complex and top-down processes can also shape trophic structure. We expand...

Data from: Cropland connectivity affects genetic divergence of Colorado potato beetle along an invasion front

Fangyuan Yang, Ning Liu, Michael S. Crossley, Pengcheng Wang, Zhuo Ma, Jianjun Guo & Runzhi Zhang
The population genetic structure of invasive species can be strongly affected by environmental and landscape barriers to dispersal. Disentangling the relative contributions of these factors to genetic divergence among invading populations is a fundamental goal of landscape genetics with important implications for invasion management. Here, we relate patterns of genetic divergence in a global invasive agricultural pest, Colorado potato beetle (CPB; Leptinotarsa decemlineata), to environmental and landscape factors along an invasion front in Northwestern China....

Social trematodes parasites increase standing army size in areas of greater invasion threat

Emlyn Resetarits, Mark Torchin & Ryan Hechinger
Organisms or societies are resource limited, causing important trade-offs between reproduction and defence. Given such trade-offs, optimal allocation theory predicts that, for animal societies with a soldier caste, allocation to soldiers should reflect local external threats. Although both threat intensity and soldier allocation can vary widely in nature, we currently lack strong evidence that spatial variation in threat can drive corresponding variation in soldier allocation. The diverse guild of trematode parasites of the California horn...

Reactivation of latent infections with migration shapes population-level disease dynamics

Daniel Becker, Ellen Ketterson & Richard Hall
Annual migration is common across animal taxa and can dramatically shape the spatial and temporal patterns of infectious disease. Although migration can decrease infection prevalence in some contexts, these energetically costly long-distance movements can also have immunosuppressive effects that may interact with transmission processes in complex ways. Here we develop a mechanistic model for the reactivation of latent infections driven by physiological changes or energetic costs associated with migration (i.e., “migratory relapse”) and its effects...

Nest survival, female survival, and average covariates used in modeling, along with metadata

Michael Chamberlain
Females must balance physiological and behavioral demands of producing offspring with associated expenditures, such as resource acquisition and predator avoidance. Nest success is an important parameter underlying avian population dynamics. Galliforms are particularly susceptible to low nest success due to exposure of ground nests to multiple predator guilds, lengthy incubation periods, and substantive reliance on crypsis for survival. Hence, it is plausible that nesting individuals prioritize productivity and survival differently, resulting in a gradient of...

Data from: Genomic evidence of prevalent hybridization throughout the evolutionary history of the fig-wasp pollination mutualism

Gang Wang, Xingtan Zhang, Edward Herre, Charles Cannon, Doyle McKey, Carlos Machado, Wen-Bin Yu, Michael Arnold, Rodrigo Pereira, Ray Ming, Yi-Fei Liu, Yibin Wang, Dongna Ma & Jin Chen
Ficus (figs) and their agaonid wasp pollinators present an ecologically important mutualism that also provides a rich comparative system for studying functional co-diversification throughout its coevolutionary history (~75 million years). We obtained entire nuclear, mitochondrial, and chloroplast genomes for 15 species representing all major clades of Ficus. Multiple analyses of these genomic data suggest that hybridization events have occurred throughout Ficus evolutionary history. Furthermore, cophylogenetic reconciliation analyses detect significant incongruence among all nuclear, chloroplast, and...

Asimina triloba georeferenced occurrence data and genetic data

Dorset Trapnell, Graham Wyatt & James Hamrick
Aim: Predictions of species’ responses to accelerating global climate change require an understanding of historical range shifts. However, large-scale phylogeographic studies of Eastern North American understory plant taxa are relatively scarce. Here we employ ecological niche modelling and genetic analyses for inference of optimal pawpaw habitat in the past and future. Location: Twenty-six states in the eastern United States Taxon: Asimina triloba (L.) Dunal (Annonaceae) Methods: The present-day niche of Asimina triloba was modelled in...

Data from: The multispecies coalescent model outperforms concatenation across diverse phylogenomic

Xiaodong Jiang, Scott Edwards & Liang Liu
A statistical framework of model comparison and model validation is essential to resolving the debates over concatenation and coalescent models in phylogenomic data analysis. A set of statistical tests are here applied and developed to evaluate and compare the adequacy of substitution, concatenation, and multispecies coalescent (MSC) models across 47 phylogenomic data sets collected across tree of life. Tests for substitution models and the concatenation assumption of topologically concordant gene trees suggest that a poor...

Warmer nights offer no respite for a defensive mutualism

Clesson Higashi, Brandon Barton & Kerry Oliver
1. Ecologically-relevant symbioses are widespread in terrestrial arthropods but based on recent findings these specialized interactions are likely to be especially vulnerable to climate warming. Importantly, empirical data and climate models indicate that warming is occurring asynchronously, with nighttime temperatures increasing faster than daytime temperatures. Daytime (DTW) and nighttime warming (NTW) may impact ectothermic animals and their interactions differently as DTW results in greater daily temperature variation and moves organisms nearer to their thermal limits,...

Data from: Joint phylogenetic estimation of geographic movements and biome shifts during the global diversification of Viburnum

Michael Landis, Deren Eaton, Wendy Clement, Brian Park, Elizabeth Spriggs, Patrick Sweeney, Erika Edwards & Michael Donoghue
Phylogeny, molecular sequences, fossils, biogeography, and biome occupancy are all lines of evidence that reflect the singular evolutionary history of a clade, but they are most often studied separately, by first inferring a fossil-dated molecular phylogeny, then mapping on ancestral ranges and biomes inferred from extant species. Here we jointly model the evolution of biogeographic ranges, biome affinities, and molecular sequences, incorporating fossils to estimate a dated phylogeny for all of the 163 extant species...

Deep evolutionary analysis reveals the design principles of fold A glycosyltransferases

Rahil Taujale, Aarya Venkat, Liang-Chin Huang, Zhongliang Zhou, Wayland Yeung, Khaled Rasheed, Sheng Li, Arthur Edison, Kelley Moremen & Natarajan Kannan
Glycosyltransferases (GTs) are prevalent across the tree of life and regulate nearly all aspects of cellular functions. The evolutionary basis for their complex and diverse modes of catalytic functions remain enigmatic. Here, based on deep mining of over half million GT-A fold sequences, we define a minimal core component shared among functionally diverse enzymes. We find that variations in the common core and emergence of hypervariable loops extending from the core contributed to GT-A diversity....

Data from: Spatial and temporal variation in nest temperatures forecasts sex ratio skews in a crocodilian with environmental sex determination

Samantha L. Bock, Russell H. Lowers, Thomas R. Rainwater, Eric Stolen, John M. Drake, Philip M. Wilkinson, Stephanie Weiss, Back Brenton, Louis Guillette & Benjamin B. Parrott
Species displaying temperature-dependent sex determination (TSD) are especially vulnerable to the effects of a rapidly changing global climate due to their profound sensitivity to thermal cues during development. Predicting the consequences of climate change for these species, including skewed offspring sex ratios, depends on understanding how climatic factors interface with features of maternal nesting behavior to shape the developmental environment. Here, we measure thermal profiles in 86 nests at two geographically distinct sites in the...

Data and code from: Vector demography, dispersal, and the spread of disease: Experimental epidemics under elevated resource supply

Alexander Strauss, Jeremiah Henning, Anita Porath-Krause, Ashley Asmus, Allison Shaw, Elizabeth Borer & Eric Seabloom
1. The spread of many diseases depends on the demography and dispersal of arthropod vectors. Classic epidemiological theory typically ignores vector dynamics and instead makes the simplifying assumption of frequency-dependent transmission. Yet vector ecology may be critical for understanding the spread of disease over space and time and how disease dynamics respond to environmental change. 2. Here, we ask how environmental change shapes vector demography and dispersal, and how these traits of vectors govern the...

Relationships between a common Caribbean corallivorous snail and protected area status, coral cover, and predator abundance

Elizabeth Shaver, Julianna Renzi, Maite Bucher & Brian Silliman
As coral populations decline across the Caribbean, it is becoming increasingly important to understand the forces that inhibit coral survivorship and recovery. Predation by corallivores, such as the short coral snail Coralliophila abbreviata,are one threat to the health of reefs worldwide, but understanding of the factors controlling corallivore populations, and therefore corallivore predation pressure, remains limited. To examine the extent to which bottom-up (i.e., coral prey) and top-down (i.e., predators) forces relate to C. abbreviata...

St Kitts Mosquito Survey and Model November 2017 to March 2019

Matthew Valentine, Courtney Murdock, Brenda Ciraola, Greg Jacobs, Patrick Kelly & Charlie Arnot
Background: High quality mosquito surveys that collect fine resolution local data on mosquito species’ abundances provide baseline data to help us understand potential host-pathogen-mosquito relationships, accurately predict disease transmission, and target mosquito control efforts in areas at risk of mosquito borne diseases. Methods: As part of an investigation into arboviral sylvatic cycles on the Caribbean island of St. Kitts, we carried out an island wide mosquito survey from November 2017 to March 2019. Using Biogents...

Climate manipulations differentially affect plant population dynamics within versus beyond northern range limits

Paul Reed, Megan Peterson, Laurel Pfeifer-Meister, William Morris, Daniel Doak, Bitty Roy, Bart Johnson, Graham Bailes & Aaron Nelson
Predicting species’ range shifts under future climate is a central goal of conservation ecology. Studying populations within and beyond multiple species’ current ranges can help identify whether demographic responses to climate change exhibit directionality, indicative of range shifts, and whether responses are uniform across a suite of species. We quantified the demographic responses of six native perennial prairie species planted within and, for two species, beyond their northern range limits to a three-year experimental manipulation...

Lunar rhythms in growth of larval fish

Jeffrey S. Shima, Craig W. Osenberg, Erik G. Noonburg, Suzanne H. Alonzo & Stephen E. Swearer
Growth and survival of larval fishes is highly variable and unpredictable. Our limited understanding of this variation constrains our ability to forecast population dynamics and effectively manage fisheries. Here we show that daily growth rates of a coral reef fish (the sixbar wrasse, Thalassoma hardwicke) are strongly lunar-periodic and predicted by the timing of nocturnal brightness: growth was maximized when the first half of the night was dark and the second half of the night...

Urban specialization reduces habitat connectivity by a highly mobile wading bird

Claire Teitelbaum, Hepinstall-Cymerman Jeffrey, Kidd-Weaver Anjelika, Hernandez Sonia, Altizer Sonia & Hall Richard
Background Mobile animals transport nutrients and propagules across habitats, and are crucial for the functioning of food webs and for ecosystem services. Human activities such as urbanization can alter animal movement behavior, including site fidelity and resource use. Because many urban areas are adjacent to natural sites, mobile animals might connect natural and urban habitats. More generally, understanding animal movement patterns in urban areas can help predict how urban expansion will affect the roles of...

Data from: Associations between testosterone and immune activity in alligators depend on bacteria species and temperature

Ashley A. LaVere, Heather J. Hamlin, Russell H. Lowers, Benjamin B. Parrott & Vanessa O. Ezenwa
Males often use elaborate sexual traits to enhance reproduction, but can experience trade-offs between investment in these traits and other physiological needs. The immunocompetence handicap hypothesis (ICHH) postulates that testosterone supports development of sexual traits while also suppressing immunity. While the ICHH implicates testosterone-mediated immunosuppression as a key mechanism of honest signaling in males, conflicting patterns across studies suggest that testosterone-immunity interactions are complex. In this study, we test the ICHH in free-ranging alligators and...

Dead litter of resident species first facilitates and then inhibits sequential life stages of range-expanding species

Rachel Smith, Julie Blaze & James Byers
1. Resident species can facilitate invading species (biotic assistance) or inhibit their expansion (biotic resistance). Species interactions are often context-dependent and the relative importance of biotic assistance versus resistance could vary with abiotic conditions or the life stage of the invading species, as invader stress tolerances and resource requirements change with ontogeny. In northeast Florida salt marshes, the abundant dead litter (wrack) of the native marsh cordgrass, Spartina alterniflora, could influence the expansion success of...

Effects of social structure and management on risk of disease establishment in wild pigs

Anni Yang, Peter Schlichting, Bethany Wight, Wesley Anderson, Sarah Chinn, Mark Wilber, Ryan Miller, James Beasley, Raoul Boughton, Kurt VerCauteren, George Wittemyer & Kim Pepin
1. Contact heterogeneity among hosts determines invasion and spreading dynamics of infectious disease, thus its characterization is essential for identifying effective disease control strategies. Yet, little is known about the factors shaping contact networks in many wildlife species and how wildlife management actions might affect contact networks. 2. Wild pigs in North America are an invasive, socially-structured species that pose a health concern for domestic swine given their ability to transmit numerous devastating diseases such...

Implementation and adherence of routine pertussis vaccination (DTP) in a low-resource urban birth cohort

Christian Gunning, Lawrence Mwananyanda, William MacLeod, Magdalene Mwale, Donald Thea, Rachel Pieciak, Pejman Rohani & Christopher Gill
Introduction: Reliable information on rates of up-to-date coverage and timely administration of routine childhood immunizations is critical for guiding public health efforts worldwide, yet prospective observation of vaccination programs within individual communities is rare. Here we provide a longitudinal analysis of the directly-observed administration of a 3-dose primary vaccination series to infants in a low-resource community in Lusaka, Zambia. Methods: Throughout 2015, we recruited a longitudinal birth cohort of mother/infant pairs (initial enrollment, 1,981 pairs;...

Fruit preferences by fishes in a Neotropical floodplain

Joisiane Mendes Araujo, Sandra Bibiana Correa, Jill Anderson & Jerry Penha.
The diets of frugivorous animals result from the interaction between feeding preference and ecological factors such as availability of alternative resources and interactions with other frugivores. A better understanding of frugivore diets will enable predictions about the vulnerability of plant populations to anthropogenic or natural environmental changes. In addition, frugivores with greater variation in diet (generalists) are potentially more resilient to habitat changes than specialists. Here, we combined data on diets of frugivorous fishes with...

The target of selection matters: an established resistance – development-time negative genetic trade-off is not found when selecting on development time.

Lewis Bartlett, Elisa Visher, Yazmin Haro, Katherine Roberts & Mike Boots
Trade-offs are fundamental to evolutionary outcomes and play a central role in eco-evolutionary theory. They are often examined by experimentally selecting on one life-history trait and looking for negative correlations in other traits. For example, populations of the moth Plodia interpunctella selected to resist viral infection show a life-history cost with longer development times. However, we rarely examine whether the detection of such negative genetic correlations depends on the trait on which we select. Here...

Registration Year

  • 2020

Resource Types

  • Dataset


  • University of Georgia
  • Duke University
  • University of California, Berkeley
  • University of California, Davis
  • United States Geological Survey
  • University of British Columbia
  • University of Montana
  • Stanford University
  • The Nature Conservancy
  • Columbia University