19 Works

Data from: Accurate estimates of age at maturity from the growth trajectories of fishes and other ectotherms

Andrew E. Honsey, David F. Staples & Paul A. Venturelli
Age-at-maturity (AAM) is a key life history trait that provides insight into ecology, evolution, and population dynamics. However, maturity data can be costly to collect or may not be available. Life history theory suggests that growth is biphasic for many organisms, with a change-point in growth occurring at maturity. If so, then it should be possible to use a biphasic growth model to estimate AAM from growth data. To test this prediction, we used the...

Data for Open water dreissenid mussel control projects: lessons learned from a retrospective analysis

Angelique Dahlberg, Diane L. Waller, David Hammond, Keegan Lund & Nicholas Phelps

Data and Code for: An index for measuring functional extension and evenness in trait space

Tao Zhang, Grant M. Domke, Matthew B. Russell & Jeremy W. Lichstein
Most existing functional diversity indices focus on single specific facet of functional diversity. Although they help scrutinize the details of functional diversity from their own angles, they often present some limitations in estimating functional diversity from a broad perspective. Here we presented a functional extension and evenness (FEE) index that encloses two important aspects of functional diversity. This index is based on a straightforward notion that a community has high diversity when its species are...

Relative reproductive phenology and synchrony affect neonate survival in a nonprecocial ungulate

Eric Michel, Bronson Strickland, Stephen Demarais, Jerrold Belant, Todd Kautz, Jared Duquette, Dean Beyer, Michael Chamberlain, Karl Miller, Rebecca Shuman, John Kilgo, Duane Diefenbach, Bret Wallingford, Justin Vreeland, Steve Ditchkoff, Christopher DePerno, Christopher Moorman, Michael Chitwood & Marcus Lashley
1. Degree of reproductive synchronization in prey is hypothesized as a predator defense strategy reducing prey risk via predator satiation or predator avoidance. Species with precocial young, especially those exposed to specialist predators, should be highly synchronous to satiate predators (predator satiation hypothesis), while prey with nonprecocial (i.e., altricial) young, especially those exposed to generalist predators, should become relatively asynchronous to avoid predator detection (predator avoidance hypothesis). The white-tailed deer (Odocoileus virginianus) in North America...

Microbial associations and spatial proximity predict North American moose (Alces alces) gastrointestinal community composition

Nicholas Fountain-Jones, Nicholas Clark, Amy Kinsley, Michelle Carstensen, James Forester, Johnson Timothy, Elizabeth Miller, Seth Moore, Tiffany Wolf & Meggan Craft
Microbial communities are increasingly recognised as crucial for animal health. However, our understanding of how microbial communities are structured across wildlife populations is poor. Mechanisms such as interspecific associations are important in structuring free-living communities, but we still lack an understanding of how important interspecific associations are in structuring gut microbial communities in comparison to other factors such as host characteristics or spatial proximity of hosts. Here we ask how gut microbial communities are structured...

Data from: The legacy of large regime shifts in shallow lakes

Joy M. Ramstack Hobbs, William O. Hobbs, Mark B. Edlund, Kyle D. Zimmer, Kevin M. Theissen, Natalie Hoidal, Leah M. Domine, Mark A. Hanson, Brian R. Herwig & James B. Cotner
Ecological shifts in shallow lakes from clear-water macrophyte-dominated to turbid-water phytoplankton-dominated are generally thought of as rapid short-term transitions. Diatom remains in sediment records from shallow lakes in the Prairie Pothole Region of North America provide new evidence that the long-term ecological stability of these lakes is defined by the legacy of large regime shifts. Here we examine the modern and historical stability of eleven shallow lakes. Currently, four of the lakes are in a...

Data from: Energy conserving thermoregulatory patterns and lower disease severity in a bat resistant to the impacts of white-nose syndrome

Marianne S. Moore, Kenneth A. Field, Melissa J. Behr, Gregory G. Turner, Morgan E. Furze, Daniel W. F. Stern, Paul R. Allegra, Sarah A. Bouboulis, Chelsey D. Musante, Megan E. Vodzak, Matthew E. Biron, Melissa B. Meierhofer, Winifred F. Frick, Jeffrey T. Foster, Daryl Howell, Joseph A. Kath, Allen Kurta, Gerda Nordquist, Joseph S. Johnson, Thomas M. Lilley, Benjamin W. Barrett & DeeAnn M. Reeder
The devastating bat fungal disease, white-nose syndrome (WNS), does not appear to affect all species equally. To experimentally determine susceptibility differences between species, we exposed hibernating naïve little brown myotis (Myotis lucifugus) and big brown bats (Eptesicus fuscus) to the fungus that causes WNS, Pseudogymnoascus destructans (Pd). After hibernating under identical conditions, Pd lesions were significantly more prevalent and more severe in little brown myotis. This species difference in pathology correlates with susceptibility to WNS...

Data from: Environmental filtering and competitive exclusion drive biodiversity-invasibility relationships in shallow lake plant communities

Ranjan Muthukrishnan, Nicole Hansel-Welch & Daniel J. Larkin
1. Understanding the processes that influence the diversity of ecological communities and their susceptibility to invasion by exotic species remains a challenge in ecology. In many systems, a positive relationship between the richness of native species and exotic species has been observed at larger spatial (e.g., regional) scales, while a negative pattern has been observed at local (e.g., plot) scales. These patterns are widely attributed to (1) biotic interactions, particularly biotic resistance, limiting invasions in...

Artificial night light helps account for observer bias in citizen science monitoring of an expanding large mammal population

Mark Ditmer, Fabiola Iannarilli, Andrew Tri, David Garshelis & Neil Carter
1. The integration of citizen scientists into ecological research is transforming how, where, and when data are collected, and expanding the potential scales of ecological studies. Citizen-science projects can provide numerous benefits for participants, while educating and connecting professionals with lay audiences, potentially increasing acceptance of conservation and management actions. However, for all the benefits, collection of citizen-science data is often biased towards areas that are easily accessible (e.g. developments and roadways), and thus data...

Data from: Influence of drift and admixture on population structure of American black bears (Ursus americanus) in the Central Interior Highlands, U.S.A. 50 years after translocation

Emily E. Puckett, Thea V. Kristensen, Clay M. Wilton, Sara B. Lyda, Karen V. Noyce, Paula M. Holahan, , Jeff Beringer, Jerrold L. Belant, , Lori S. Eggert & David M. Leslie
Bottlenecks, founder events, and genetic drift often result in decreased genetic diversity and increased population differentiation. These events may follow abundance declines due to natural or anthropogenic perturbations, where translocations may be an effective conservation strategy to increase population size. American black bears (Ursus americanus) were nearly extirpated from the Central Interior Highlands, USA by 1920. In an effort to restore bears, 254 individuals were translocated from Minnesota, USA and Manitoba, Canada, into the Ouachita...

Data from: Watershed versus within-lake drivers of nitrogen: phosphorus dynamics in shallow lakes

Luke J. Ginger, Kyle D. Zimmer, Brian R. Herwig, Mark A. Hanson, William O. Hobbs, Gaston E. Small & James B. Cotner
Research on lake eutrophication often identifies variables affecting amounts of phosphorus (P) and nitrogen (N) in lakes, but understanding factors influencing N:P ratios is important given its influence on species composition and toxin production by cyanobacteria. We sampled 80 shallow lakes in Minnesota (USA) for three years to assess effects of watershed size, proportion of watershed as both row crop and natural area, fish biomass, and lake alternative state (turbid versus clear) on total N:...

Data from: Application of a Bayesian weighted surveillance approach for detecting chronic wasting disease in white-tailed deer

Christopher S. Jennelle, Daniel P. Walsh, Michael D. Samuel, Erik E. Osnas, Robert Rolley, Julia Langenberg, Jenny G. Powers, Ryan J. Monello, E. David Demarest, Rolf Gubler & Dennis M. Heisey
SUMMARY 1. Surveillance is critical for the early detection of emerging and re-emerging infectious diseases, and weighted surveillance uses heterogeneity in risk of infection to increase the sampling efficiency. 2. We apply a Bayesian approach to estimate weights for 16 surveillance classes of white-tailed deer in Wisconsin, USA, relative to hunter-harvested yearling males. We use these weights to conduct a surveillance program for detecting chronic wasting disease (CWD) in white-tailed deer at Shenandoah National Park...

Data from: Long-term population dynamics of dreissenid mussels (Dreissena polymorpha and D. rostriformis): a cross-system analysis

David L. Strayer, Boris V. Adamovich, Rita Adrian, David C. Aldridge, Csilla Balogh, Lyubov E. Burlakova, Hannah B. Fried-Petersen, László G.‐Tóth, Amy L. Hetherington, Thomas S. Jones, Alexander Y. Karatayev, Jacqueline B. Madill, Oleg A. Makarevich, J. Ellen Marsden, Andre L. Martel, Dan Minchin, Thomas F. Nalepa, Ruurd Noordhuis, Timothy J. Robinson, Lars G. Rudstam, Astrid N. Schwalb, David R. Smith, Alan D. Steinman & Jonathan M. Jeschke
Dreissenid mussels (including the zebra mussel Dreissena polymorpha and the quagga mussel D. rostriformis) are among the world's most notorious invasive species, with large and widespread ecological and economic effects. However, their long‐term population dynamics are poorly known, even though these dynamics are critical to determining impacts and effective management. We gathered and analyzed 67 long‐term (>10 yr) data sets on dreissenid populations from lakes and rivers across Europe and North America. We addressed five...

Data from: Optimizing techniques to capture and extract environmental DNA for detection and quantification of fish

Jessica J. Eichmiller, Loren M. Miller & Peter W. Sorensen
Few studies have examined capture and extraction methods for environmental DNA (eDNA) to identify techniques optimal for detection and quantification. In this study, precipitation, centrifugation and filtration eDNA capture methods and six commercially available DNA extraction kits were evaluated for their ability to detect and quantify common carp (Cyprinus carpio) mitochondrial DNA using quantitative PCR in a series of laboratory experiments. Filtration methods yielded the most carp eDNA, and a glass fibre (GF) filter performed...

Data from: American black bears perceive the risks of crossing roads

Mark A. Ditmer, Spencer J. Rettler, John R. Fieberg, Paul A. Iaizzo, Timothy G. Laske, Karen V. Noyce & David L. Garshelis
Roadways may negatively impact wildlife species through vehicular-related mortality and spatial displacement or obstruction. Here we investigated physiological responses, which provide insights into the animal’s perception of its environment. We deployed GPS-collars in combination with cardiac biologgers on American black bears (Ursus americanus; 18 bear-years) in areas with differing road densities across Minnesota, USA. We tested whether bears exhibited acute stress responses, as defined by significant increases in heart rate (HR), associated with road crossings....

Data from: First discovery of the charophycean green alga Lychnothamnus barbatus (Charophyceae) extant in the New World

Kenneth G. Karol, Paul M. Skawinski, Richard M. McCourt, Michelle E. Nault, Reesa Evans, Martha E. Barton, Matthew S. Berg, Donna J. Perleberg, John Hall & John D. Hall
Premise of the study: Although some species of Characeae, known as stoneworts, can be found on every continent except Antarctica, many species and some genera have limited geographic distributions. The genus Lychnothamnus, represented by a single extant species L. barbatus, was known only from scattered localities in Europe and Australasia until it was recently discovered in North America. Methods: Morphological identifications were made from specimens collected in Minnesota and Wisconsin, U.S.A. DNA sequences were obtained...

Inland walleye genotypes

Matthew Bootsma, Kristen Gruenthal, Garrett McKinney, Levi Simmons, Loren Miller, Greg Sass & Wes Larson
Targeted amplicon sequencing methods, such as genotyping-in-thousands by sequencing (GT-seq), facilitate rapid, accurate, and cost-effective analysis of hundreds of genetic loci in thousands of individuals. Development of GT-seq panels is non-trivial, but studies describing trade-offs associated with different steps of GT-seq panel development are rare. Here, we construct a dual-purpose GT-seq panel for walleye (Sander vitreus), discuss trade-offs associated with different development and genotyping approaches, and provide suggestions for researchers constructing their own GT-seq panels....

Data assessing survival variation between capture methods in white-tailed deer

Eric Michel, Katherine Brackel, Bailey Gullikson, Jonathan Jenks & William Jensen
Understanding what variables affect ungulate neonate survival is imperative to successful conservation and management of the species. Predation is commonly cited as a cause-specific source of mortality and ecological covariates often influence neonate survival. However, variation in survival estimates related to capture methodology has been documented with opportunistically captured neonates generally displaying greater survival than those captured via aid of vaginal implant transmitters (VITs), likely because of increased left truncation observed in the opportunistically captured...

Survival data of Martes Americana and landscape variables associated with mortality events

Matthew Smith, John Erb & Jonathan Pauli
To test the effects of seasonal heterogeneity on a reintroduced carnivore, American martens (Martes americana), we compared metrics of local and season-specific heterogeneity to traditional forest metrics on the survival of 242 individuals across 8 years and predicted a survival landscape for 13 reintroduction sites. We identified a set of variables that characterized potentially important drivers of marten survival, allowing for a comparison between heterogeneity metrics (i.e., complexity of vegetation, land cover, and abiotic conditions)...

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