59 Works

Data from: Evaluating consumptive and nonconsumptive predator effects on prey density using field times series data

, Scott D. Peacor, David B. Bunnell, Henry A. Vanderploeg, Steve A. Pothoven, Ashley K. Elgin, James R. Bence, Jing Jiao, Edward L. Ionides, D.B. Bunnell, J.A. Marino, E.L. Ionides, S.A. Pothoven, A.K. Elgin, H.A. Vanderploeg, S.D. Peacor & J.R. Bence
Determining the degree to which predation affects prey abundance in natural communities constitutes a key goal of ecological research. Predators can affect prey through both consumptive effects (CEs) and nonconsumptive effects (NCEs), although the contributions of each mechanism to the density of prey populations remain largely hypothetical in most systems. Common statistical methods applied to time series data cannot elucidate the mechanisms responsible for hypothesized predator effects on prey density (e.g., differentiate CEs from NCEs),...

Data from: A whole methylome study of ethanol exposure in brain and blood: an exploration of the utility of peripheral blood as proxy tissue for brain in alcohol methylation studies

Shaunna L. Clark, Blair N. Costin, Robin F. Chan, Alexander W. Johnson, Linying Xie, Jessica L. Jurmain, Gaurav Kumar, Andrey A. Shabalin, Ashutosh K. Pandey, Karolina A. Aberg, Michael F. Miles & Edwin Van Den Oord
Background: Recent reviews have highlighted the potential use of blood‐based methylation biomarkers as diagnostic and prognostic tools of current and future alcohol use and addiction. Due to the substantial overlap that often exists between methylation patterns across different tissues, including blood and brain, blood‐based methylation may track methylation changes in brain; however, little work has explored the overlap in alcohol‐related methylation in these tissues. Methods: To study the effects of alcohol on the brain methylome...

Data from: Organic matter loading by hippopotami causes subsidy overload resulting in downstream hypoxia and fish kills

Christopher L. Dutton, Amanda L. Subalusky, Stephen K. Hamilton, Emma J. Rosi & David M. Post
Organic matter and nutrient loading into aquatic ecosystems affects ecosystem structure and function and can result in eutrophication and hypoxia. Hypoxia is usually attributed to anthropogenic pollution and is rarely documented in unpolluted systems, particularly in rivers. Here we show that organic matter loading from hippopotami causes the repeated occurrence of hypoxia in the Mara River, East Africa. We documented 49 high flow events over three years that caused dissolved oxygen decreases, including 13 events...

Data from: Space use by 4 strains of laying hens to perch, wing flap, dust bathe, stand and lie down

Elizabeth R. Riddle, Ahmed B. A. Ali, Dana L. M. Campbell & Janice M. Siegford
The laying hen industry is implementing aviary systems intended to improve welfare by providing hens with more space and resources to perform species-specific behaviors. To date, limited research has examined spatial requirements of various strains of laying hens for performing key behaviors and none has been conducted within an alternative housing system. This study investigated the amount of space used by 4 strains of laying hens (Hy-Line Brown [HB], Bovans Brown [BB], DeKalb White [DW],...

Data from: Tropical bird species have less variable body sizes

Quentin D. Read, Benjamin Baiser, John M. Grady, Phoebe L. Zarnetske, Sydne Record & Jonathan Belmaker
Ecologists have often predicted that species’ niche breadths should decline toward the equator. Dan Janzen arrived at this prediction based on climatic constraints, while Robert MacArthur argued that a latitudinal gradient in resource specialization drives the pattern. This idea has some support when it comes to thermal niches, but has rarely been explored for other niche dimensions. Body size is linked to niche dimensions related to diet, competition, and environmental tolerance in vertebrates. We identified...

Data from: Field-scale experiments reveal persistent yield gaps in low-input and organic cropping systems

Alexandra N. Kravchenko, Sieglinde S. Snapp & G. Philip Robertson
Knowledge of production-system performance is largely based on observations at the experimental plot scale. Although yield gaps between plot-scale and field-scale research are widely acknowledged, their extent and persistence have not been experimentally examined in a systematic manner. At a site in southwest Michigan, we conducted a 6-y experiment to test the accuracy with which plot-scale crop-yield results can inform field-scale conclusions. We compared conventional versus alternative, that is, reduced-input and biologically based–organic, management practices...

Data from: The evolution of floral signals in relation to range overlap in a clade of California Jewelflowers (Streptanthus s.l.)

Marjorie G. Weber, N. Ivalu Cacho, Martin J. Q. Phan, Caprice Disbrow, Santiago R. Ramirez & Sharon Y. Strauss
Because of their function as reproductive signals in plants, floral traits experience distinct selective pressures related to their role in speciation, reinforcement, and prolonged coexistence with close relatives. However, few studies have investigated whether population-level processes translate into detectable signatures at the macroevolutionary scale. Here, we ask whether patterns of floral trait evolution and range overlap across a clade of California Jewelflowers reflect processes hypothesized to shape floral signal differentiation at the population level. We...

Data from: Evolution of increased Medicaco polymorpha size during invasion does not result in increased competitive ability

Zoe L. Getman-Pickering, Casey P. TerHorst, Susan M. Magnoli & Jennifer A. Lau
Species invading new habitats experience novel selection pressures that can lead to rapid evolution, which may contribute to invasion success and/or increased impact on native community members. Many studies have hypothesized that plants in the introduced range will be larger than those in the native range, leading to increases in competitive ability. There is mixed support for evolution of larger sizes in the introduced range, but few studies have explicitly tested whether evolutionary changes result...

Data from: Local interactions and self-organized spatial patterns stabilize microbial cross-feeding against cheaters

Simon Maccracken Stump, Evan Curtis Johnson & Christopher A. Klausmeier
Mutualisms are ubiquitous, but models predict they should be susceptible to cheating. Resolving this paradox has become relevant to synthetic ecology: cooperative cross-feeding, a nutrient exchange mutualism, has been proposed to stabilize microbial consortia. Previous attempts to understand how cross-feeders remain robust to non-producing cheaters have relied on complex behavior (e.g., cheater punishment) or group selection. Using a stochastic spatial model, we demonstrate two novel mechanisms that can allow cross-feeders to outcompete cheaters, rather than...

Data from: Necrobiome framework for bridging decomposition ecology of autotrophically and heterotrophically derived organic matter

Mark Eric Benbow, Philip S. Barton, Michael D. Ulyshen, James C. Beasley, Travis L. DeVault, Michael S. Strickland, Jeffery K. Tomberlin, Heather R. Jordan & Jennifer L. Pechal
Decomposition contributes to global ecosystem function by contributing to nutrient recycling, energy flow and limiting biomass accumulation. The decomposer organisms influencing this process form diverse, complex, and highly dynamic communities that often specialize on different plant or animal resources. Despite performing the same net role, there is a need to conceptually synthesize information on the structure and function of decomposer communities across the spectrum of dead plant and animal resources. A lack of synthesis has...

Data from: Early accumulation of active fraction soil carbon in newly established cellulosic biofuel systems

Christine D. Sprunger & G. Philip Robertson
We examined relative changes in soil C pools shortly after the establishment of six perennial and two annual bioenergy cropping systems that differed in diversity (monoculture vs. polyculture). Perennial systems included two monocultures (switchgrass, Panicum virgatum; and miscanthus, Miscanthus × giganteus) and four polycultures including hybrid poplar (Populus sp.) + herbaceous understory; mixed native grasses, successional vegetation, and restored prairie. Two annual systems included no-till continuous corn (Zea mays) and rotational corn (corn-soybean (Glycine max)-canola...

Data from: Analysis of bacterial genomes from an evolution experiment with horizontal gene transfer shows that recombination can sometimes overwhelm selection

Rohan Maddamsetti & Richard E. Lenski
Few experimental studies have examined the role that sexual recombination plays in bacterial evolution, including the effects of horizontal gene transfer on genome structure. To address this limitation, we analyzed genomes from an experiment in which Escherichia coli K-12 Hfr (high frequency recombination) donors were periodically introduced into 12 evolving populations of E. coli B and allowed to conjugate repeatedly over the course of 1000 generations. Previous analyses of the evolved strains from this experiment...

Data from: Assessing impact of exogenous features on biotic phenomena in the presence of strong spatial dependence: a lake sturgeon case study in natural stream settings

Andrew O. Finley, Patrick S. Forsythe, James A. Crossman, Edward A. Baker & Kim T. Scribner
Modeling spatially explicit data provides a powerful approach to identify the effects of exogenous features associated with biological processes, including recruitment of stream fishes. However, the complex spatial and temporal dynamics of the stream and the species' reproductive and early life stage behaviors present challenges to drawing valid inference using traditional regression models. In these settings it is often difficult to ensure the spatial independence among model residuals---a key assumption that must be met to...

Data from: Limited phenological and dietary overlap between bee communities in spring flowering crops and herbaceous enhancements.

Thomas J. Wood, Jason Gibbs, Nikki Rothwell, Julianna K. Wilson, Larry Gut, Julia Brokaw & Rufus Isaacs
Wild bee populations have undergone declines in recent years across much of the Western world, and these declines have the potential to limit yield in pollination-dependent crops. Highbush blueberry, Vaccinium corymbosum, and tart cherry, Prunus cerasus, are spring-blooming crops that rely on the movement of pollen by bees and other insects for pollination. Wild bee populations can be increased on farmland by providing floral resources, but whether the addition of these plants translates into increased...

Data from: The effects of agent hybridization on the efficacy of biological control of tansy ragwort at high elevations

Marianna Szucs, Patricia E. Salerno, Brittany J. Teller, Urs Schaffner, Jeffrey L. Littlefield & Ruth A. Hufbauer
The success rate of weed biological control programs is difficult to evaluate and the factors affecting it remain poorly understood. One aspect which is still unclear is whether releases of multiple, genetically distinct populations of a biological control agent increase the likelihood of success, either by independent colonization of different environmental niches or by hybridization that may increase the agent’s fitness and adaptive ability. Since hybridization is often invoked to explain the success of unintentionally...

Data from: Genetic variation in mutualistic and antagonistic interactions in an invasive legume

Casey P. TerHorst, Camdilla Wirth & Jennifer A. Lau
Mutualists may play an important role in invasion success. The ability to take advantage of novel mutualists or survive and reproduce despite a lack of mutualists may facilitate invasion by those individuals with such traits. Here, we used two greenhouse studies to examine how soil microbial communities in general and mutualistic rhizobia in particular affect the performance of a legume species (Medicago polymorpha) that has invaded five continents. We performed two plant growth experiments with...

Data from: Inferring continuous and discrete population genetic structure across space

Gideon S. Bradburd, Graham M. Coop & Peter L. Ralph
A classic problem in population genetics is the characterization of discrete population structure in the presence of continuous patterns of genetic differentiation. Especially when sampling is discontinuous, the use of clustering or assignment methods may incorrectly ascribe differentiation due to continuous processes (e.g., geographic isolation by distance) to discrete processes, such as geographic, ecological, or reproductive barriers between populations. This reflects a shortcoming of current methods for inferring and visualizing population structure when applied to...

Data from: Falcons using orchard nest boxes reduce fruit-eating bird abundances and provide economic benefits for a fruit-growing region

Megan E. Shave, Stephanie A. Shwiff, Julie L. Elser & Catherine A. Lindell
1. Suppression of pest species via a native predator is a regulating ecosystem service that has the potential to limit crop damage and produce economic benefits. American kestrels (Falco sparverius) are widespread, highly-mobile, generalist predators that hunt in human-dominated habitats and potentially provide previously undocumented ecosystem services in agricultural landscapes. 2. We hypothesized that kestrel activity associated with nest boxes and artificial perches acts to increase perceived predation risk that, in combination with direct predation,...

Data from: Associative nitrogen fixation (ANF) in switchgrass (Panicum virgatum) across a nitrogen input gradient

Sarah S. Roley, David S. Duncan, Di Liang, Aaron Garoutte, Randall D. Jackson, James M. Tiedje & G. Philip Robertson
Associative N fixation (ANF), the process by which dinitrogen gas is converted to ammonia by bacteria in casual association with plants, has not been well-studied in temperate ecosystems. We examined the ANF potential of switchgrass (Panicum virgatum L.), a North American prairie grass whose productivity is often unresponsive to N fertilizer addition, via separate short-term 15N2 incubations of rhizosphere soils and excised roots four times during the growing season. Measurements occurred along N fertilization gradients...

Data from: Genomic differentiation during speciation-with-gene-flow: comparing geographic and host-related variation in divergent life history adaptation in Rhagoletis pomonella

Meredith M. Doellman, Gregory J. Ragland, Glen R. Hood, Peter J. Meyers, Scott P. Egan, Thomas H.Q. Powell, Peter Lazorchak, Mary M. Glover, Cheyenne Tait, Hannes Schuler, Daniel A. Hahn, Stewart H. Berlocher, James J. Smith, Patrik Nosil, Jeffrey L. Feder, Daniel Hahn, Stewart Berlocher, Peter Meyers, Scott Egan, Jeffrey Feder, Glen Hood, Thomas Powell & Gregory Ragland
A major goal of evolutionary biology is to understand how variation within populations gets partitioned into differences between reproductively isolated species. Here, we examine the degree to which diapause life history timing, a critical adaptation promoting population divergence, explains geographic and host-related genetic variation in ancestral hawthorn and recently derived apple-infesting races of Rhagoletis pomonella. Our strategy involved combining experiments on two different aspects of diapause (initial diapause intensity and adult eclosion time) with a...

Data from: Phylogenomics clarifies repeated evolutionary origins of inbreeding and fungus farming in bark beetles (Curculionidae, Scolytinae)

Andrew Johnson, McKenna, Bjarte H. Jordal, Anthony I. Cognato, Sarah M. Smith, Alan R. Lemmon, Emily L. Moriarty Lemmon & Jiri Hulcr
Bark and ambrosia beetles (Curculionidae, Scolytinae) display a conspicuous diversity of unusual genetic and ecological attributes and behaviors. Reconstructing the evolution of Scolytinae, particularly the large and ecologically significant tribe Cryphalini (pygmy borers), has long been problematic. These challenges have not adequately been addressed using morphological characters, and previous research has used only DNA sequence data from small numbers of genes. Through a combination of anchored hybrid enrichment, low-coverage draft genomes, and transcriptomes, we addressed...

Data from: Candidate variants for additive and interactive effects on bioenergy traits in switchgrass (Panicum virgatum L.) identified by genome-wide association analyses

Guillaume P. Ramstein, Joseph Evans, Aruna Nandety, Malay C. Saha, E. Charles Brummer, Shawn M. Kaeppler, C. Robin Buell & Michael D. Casler
Switchgrass is a promising herbaceous energy crop, but further gains in biomass yield and quality must be achieved to enable a viable bioenergy industry. Developing DNA markers can contribute to such progress, but depiction of genetic bases should be reliable, involving not only simple additive marker effects but also interactions with genetic backgrounds, e.g., ecotypes, or synergies with other markers. We analyzed plant height, carbon content, nitrogen content, and mineral concentration in a diverse panel...

Data from: Evapotranspiration is resilient in the face of land cover and climate change in a humid temperate catchment

Stephen K. Hamilton, MIr Zaman Hussain, Christopher Lowrie, Bruno Basso & G. Philip Robertson
In temperate humid catchments, evapotranspiration returns more than half of the annual precipitation to the atmosphere, thereby determining the balance available to recharge groundwaters and support stream flow and lake levels. Changes in evapotranspiration rates and therefore catchment hydrology could be driven by changes in land use or climate. Here we examine the catchment water balance over the past 50 y for a catchment in southwest Michigan covered by cropland, grassland, forest, and wetlands. Over...

Data from: When mutualisms matter: Rhizobia effects on plant communities depend on host plant population and soil nitrogen availability

Kane R. Keller & Jennifer A. Lau
1.Mutualistic interactions, such as the relationship between legumes and rhizobia, can affect community properties, yet there needs to be greater understanding of when these interactions may be most important to communities. Resource mutualism theory provides predictions based on variation in abiotic and biotic factors. First, there is substantial intraspecific genetic variation in how legumes interact with rhizobia, including variation in legume growth response to rhizobia, number of rhizobia-housing nodules, and nitrogen fixation. Rhizobia likely have...

Data from: Evaluation of acoustic telemetry grids for determining aquatic animal movement and survival

Richard T. Kraus, Christopher M. Holbrook, Christopher S. Vandergoot, Taylor R. Stewart, Matthew D. Faust, Douglas A. Watkinson, Colin Charles, Mark Pegg, Eva C. Enders & Charles C. Krueger
1. Acoustic telemetry studies have frequently prioritized linear configurations of hydrophone receivers, such as perpendicular from shorelines or across rivers, to detect the presence of tagged aquatic animals. This approach introduces unknown bias when receivers are stationed for convenience at geographic bottlenecks (e.g., at the mouth of an embayment or between islands) as opposed to deployments following a statistical sampling design. 2. We evaluated two-dimensional acoustic receiver arrays (grids: receivers spread uniformly across space) as...

Registration Year

  • 2018

Resource Types

  • Dataset


  • Michigan State University
  • University of Wisconsin-Madison
  • Cornell University
  • University of Michigan-Ann Arbor
  • University of Notre Dame
  • University of Vermont
  • United States Department of Agriculture
  • University of Florida
  • Great Lakes Science Center
  • California State University, Northridge