12 Works

Data from: Lincoln estimates of mallard (Anas platyrhynchos) abundance in North America

Ray T. Alisauskas, Todd W. Arnold, James O. Leafloor, David L. Otis & James S. Sedinger
Estimates of range-wide abundance, harvest, and harvest rate are fundamental for sound inferences about the role of exploitation in the dynamics of free-ranging wildlife populations, but reliability of existing survey methods for abundance estimation is rarely assessed using alternative approaches. North American mallard populations have been surveyed each spring since 1955 using internationally coordinated aerial surveys, but population size can also be estimated with Lincoln's method using banding and harvest data. We estimated late summer...

Data from: Forest restoration and parasitoid wasp communities in montane Hawai'i

Rachelle K. Gould, Liba Pejchar, Sara G. Bothwell, Berry Brosi, Stacie Wolny, Chase D. Mendenhall & Gretchen Daily
Globally, most restoration efforts focus on re-creating the physical structure (flora or physical features) of a target ecosystem with the assumption that other ecosystem components will follow. Here we investigate that assumption by documenting biogeographical patterns in an important invertebrate taxon, the parasitoid wasp family Ichneumonidae, in a recently reforested Hawaiian landscape. Specifically, we test the influence of (1) planting configurations (corridors versus patches), (2) vegetation age, (3) distance from mature native forest, (4) surrounding...

Data from: Cross-biome metagenomic analyses of soil microbial communities and their functional attributes

Noah Fierer, Jonathan W. Leff, Byron J. Adams, Uffe N. Nielsen, Scott Thomas Bates, Christian L. Lauber, Sarah Owens, Jack A. Gilbert, Diana H. Wall & J. Gregory Caporaso
For centuries ecologists have studied how the diversity and functional traits of plant and animal communities vary across biomes. In contrast, we have only just begun exploring similar questions for soil microbial communities despite soil microbes being the dominant engines of biogeochemical cycles and a major pool of living biomass in terrestrial ecosystems. We used metagenomic sequencing to compare the composition and functional attributes of 16 soil microbial communities collected from cold deserts, hot deserts,...

Data from: Current approaches using genetic distances produce poor estimates of landscape resistance to interindividual dispersal

Tabitha A. Graves, Paul Beier & Jeffrey Andrew Royle
Landscape resistance reflects how difficult it is for genes to move across an area with particular attributes (e.g., land cover, slope). An increasingly popular approach to estimate resistance uses Mantel and partial Mantel tests or causal modeling to relate observed genetic distances to effective distances under alternative sets of resistance parameters. Relatively few alternative sets of resistance parameters are tested, leading to relatively poor coverage of the parameter space. Although this approach does not explicitly...

Data from: Hybridization of an invasive shrub affects tolerance and resistance to defoliation by a biological control agent

Wyatt I. Williams, Jonathan M. Friedman, John F. Gaskin & Andrew P. Norton
Evolution has contributed to the successful invasion of exotic plant species in their introduced ranges, but how evolution affects particular control strategies is still under evaluation. For instance, classical biological control, a common strategy involving the utilization of highly specific natural enemies to control exotic pests, may be negatively affected by host hybridization because of shifts in plant traits, such as root allocation or chemical constituents. We investigated introgression between two parent species of the...

Data from: Plasticity of parental care under the risk of predation: how much should parents reduce care?

Cameron K. Ghalambor, Susana I. Peluc & Thomas E. Martin
Predation can be an important agent of natural selection shaping parental care behaviours, and can also favor behavioural plasticity. Parent birds often decrease the rate that they visit the nest to provision offspring when perceived risk is high. Yet the plasticity of such responses may differ among species as a function of either their relative risk of predation, or the mean rate of provisioning. Here, we report parental provisioning responses to experimental increases in the...

Data from: Diffuse symbioses: roles of plant–plant, plant–microbe and microbe–microbe interactions in structuring the soil microbiome

Matthew G. Bakker, Daniel C. Schlatter, Lindsey Otto-Hanson & Linda L. Kinkel
A conceptual model emphasizing direct host–microbe interactions has dominated work on host-associated microbiomes. To understand plant–microbiome associations, however, broader influences on microbiome composition and functioning must be incorporated, such as those arising from plant–plant and microbe–microbe interactions. We sampled soil microbiomes associated with target plant species (Andropogon gerardii, Schizachyrium scoparium, Lespedeza capitata, Lupinus perennis) grown in communities varying in plant richness (1-, 4-, 8- or 16-species). We assessed Streptomyces antagonistic activity and analysed bacterial and...

Data from: Linking genotype, ecotype, and phenotype in an intensively managed large carnivore

Aaron B. A. Shafer, Scott E. Nielsen, Joseph M. Northrup & Gordon B. Stenhouse
Numerous factors influence fitness of free-ranging animals, yet often these are uncharacterized. We integrated GPS habitat use data and genetic profiling to determine their influence on fitness proxies (mass, length, and body condition) in a threatened population of grizzly bears (Ursus arctos) in Alberta, Canada. We detected distinct genetic and habitat use (ecotype) clusters, with individual cluster assignments, or genotype/ecotype, being correlated (Pearson r = 0.34, P < 0.01). Related individuals showed evidence of similar...

Data from: Comparative genomics reveals insight into virulence strategies of plant pathogenic oomycetes

Bishwo N. Adhikari, John P. Hamilton, Marcelo M. Zerillo, Ned Tisserat, C. André Lévesque & C. Robin Buell
The kingdom Stramenopile includes diatoms, brown algae, and oomycetes. Plant pathogenic oomycetes, including Phytophthora, Pythium and downy mildew species, cause devastating diseases on a wide range of host species and have a significant impact on agriculture. Here, we report comparative analyses on the genomes of thirteen straminipilous species, including eleven plant pathogenic oomycetes, to explore common features linked to their pathogenic lifestyle. We report the sequencing, assembly, and annotation of six Pythium genomes and comparison...

Data from: Aridity Modulates N Availability in Arid and Semiarid Mediterranean Grasslands

Manuel Delgado-Baquerizo, Fernando T. Maestre, Antonio Gallardo, José L. Quero, Victoria Ochoa, Miguel García-Gómez, Cristina Escolar, Pablo García-Palacios, Miguel Berdugo, Enrique Valencia, Beatriz Gozalo, Zouhaier Noumi, Mchich Derak, Matthew D. Wallenstein & Matteo Convertino
While much is known about the factors that control each component of the terrestrial nitrogen (N) cycle, it is less clear how these factors affect total N availability, the sum of organic and inorganic forms potentially available to microorganisms and plants. This is particularly true for N-poor ecosystems such as drylands, which are highly sensitive to climate change and desertification processes that can lead to the loss of soil nutrients such as N. We evaluated...

Data from: Allometric convergence in savanna trees and implications for plant scaling models in variable ecosystems

Andrew T. Tredennick, Lisa Patrick Bentley & Niall P. Hanan
Theoretical models of allometric scaling provide frameworks for understanding and predicting how and why the morphology and function of organisms vary with scale. It remains unclear, however, if the predictions of ‘universal’ scaling models for vascular plants hold across diverse species in variable environments. Phenomena such as competition and disturbance may drive allometric scaling relationships away from theoretical predictions based on an optimized tree. Here, we use a hierarchical Bayesian approach to calculate tree-specific, species-specific,...

Data from: Vascular plants mediate the effects of aridity and soil properties on ammonia-oxidizing bacteria and archaea

Manuel Delgado-Baquerizo, Antonio Gallardo, Matthew D. Wallenstein & Fernando T. Maestre
An integrated perspective of the most important factors driving the abundance of ammonia-oxidizing bacteria (AOB) and archaea (AOA) in natural ecosystems is lacking, especially in drylands. We evaluated how different climatic, abiotic, and nutrient-related factors determine AOA and AOB abundance in bare and vegetated microsites from grasslands throughout the Mediterranean Basin. We found a strong negative relationship between the abundance of AOA genes and soil fertility (availability of C, N, and P). Aridity and other...

Registration Year

  • 2013
    12

Resource Types

  • Dataset
    12

Affiliations

  • Colorado State University
    12
  • University of Minnesota
    2
  • King Juan Carlos University
    2
  • Pablo de Olavide University
    2
  • University of Montana
    1
  • Stanford University
    1
  • South Dakota State University
    1
  • University of Alberta
    1
  • University of Nevada Reno
    1
  • Alberta Environment and Sustainable Resource Development
    1