1,171 Works

Data from: Hybridization, species collapse, and species reemergence after disturbance to premating mechanisms of reproductive isolation

Robert Tucker Gilman & Jocelyn Elyssa Behm
There are now a number of well-studied cases in which hybridization between closely related sympatric species has increased, sometimes resulting in the replacement of species pairs by hybrid swarms. Many of these cases have been linked to anthropogenic environmental change, but the mechanisms leading from environmental change to species collapse, and the long-term effects of hybridization on species pairs, remain poorly understood. We used an individual-based stochastic simulation model to explore the conditions under which...

Governmental Units Analysis Data, 1960: Urban Racial Disorders, 1961-1968

Seymour Spilerman

Study of American Families, 1994

Robert M. Hauser & Robert D. Mare

Wisconsin consumer attitudes regarding acceptance of food-related biotechnology, 1990

Robin Douthitt

Political Elites in Mexico, 1900-1971

Peter H. Smith

Slave Movement During the Eighteenth and Nineteenth Centuries

National Health Measurement Study (NHMS), 2005-2006

Dennis G. Fryback

Puerto Rican Elderly: Health Conditions (PREHCO) Wave 2, 2006-2007

Alberto Palloni

B0 and B1 inhomogeneities in the liver at 1.5T and 3.0T

Scott B. Reeder, Nathan T. Roberts, Diego Hernando, Louis A. Hinshaw, Timothy J. Colgan & Takanori Ii

Medicaid Waiver Dataset: Coverage for Childless Adults 1996 – 2014

Marguerite Burns & Laura Dague

National Survey of Families and Households (NSFH), Wave 1 (1987-1988)

Larry L. Bumpass, Vaughn Call & James A. Sweet

National Survey of Families and Households (NSFH), Wave 2 (1992-1994)

Larry L. Bumpass & James A. Sweet

The Paris Climate Agreement and future sea level rise from Antartica

Robert M. DeConto, David Pollard, Richard B. Alley, Isabella Velicogna, Edward Gasson, Natalya Gomez, Shaina Sadai, Alan Condron, Daniel M. Gilford, Erica L. Ashe, Robert E. Kopp, Dawei Li & Andrea Dutton

Data from: Gobbling across landscapes: Eastern wild turkey distribution and occupancy-habitat associations

Christopher Pollentier, Michael Hardy, R. Scott Lutz, Scott Hull & Benjamin Zuckerberg
Extensive restoration and translocation efforts beginning in the mid-20th century helped to reestablish eastern wild turkeys (Meleagris gallopavo silvestris) throughout their ancestral range. The adaptability of wild turkeys resulted in further population expansion in regions that were considered unfavorable during initial reintroductions across the northern United States. Identification and understanding of species distributions and contemporary habitat associations are important for guiding effective conservation and management strategies across different ecological landscapes. To investigate differences in wild...

Data from: Two-phase increase in the maximum size of life over 3.5 billion years reflects biological innovation and environmental opportunity

Jonathan L. Payne, Alison G. Boyer, James H. Brown, Seth Finnegan, Michal Kowaleski, , S. Kathleen Lyons, Craig R. McClain, Daniel W. McShea, Phillip M. Novack-Gottshall, Felisa A. Smith, Jennifer A. Stempien, Steve C. Wang, M. Kowalewski & R. A. Krause
NOTE: See also http://bodysize.nescent.org. ABSTRACT: The maximum size of organisms has increased enormously since the initial appearance of life >3.5 billion years ago (Gya), but the pattern and timing of this size increase is poorly known. Consequently, controls underlying the size spectrum of the global biota have been difficult to evaluate. Our period-level compilation of the largest known fossil organisms demonstrates that maximum size increased by 16 orders of magnitude since life first appeared in...

Data from: Climate change surpasses land use change in the contracting range boundary of a winter-adapted mammal

Sean M. Sultaire, Jonathan N. Pauli, Karl J. Martin, Michael W. Meyer, Michael Notaro & Benjamin Zuckerberg
The effects of climate change on biodiversity has emerged as a dominant theme in conservation biology, possibly eclipsing concern over habitat loss in recent years. The extent to which this shifting focus has tracked the most eminent threats to biodiversity is not well documented. We investigated the mechanisms driving shifts in the southern range boundary of a forest and snow cover specialist, the snowshoe hare, to explore how its range boundary has responded to shifting...

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: The influence of topography and soil phosphorus on the vegetation of Korup Forest Reserve, Cameroun

Duncan W. Thomas, David M. Newbery, P. G. Waterman & J. S. Gartlan
All living trees (≥ 30 cm gbh) were enumerated in 135 80×80 m plots, each subdivided into four 40×40 m subplots, and arranged along four 5 km transect lines in the Korup Forest Reserve, Cameroun. For each plot altitude, slope and the extent of permanent and seasonal swamps were recorded. Four hundred and eleven taxa were recognized of which 66% were identified to species. Mean tree density was 471 ha−1, basal area 27.6 m2 ha−1...

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: 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: Unifying concepts of biological function from molecules to ecosystems

Keith D. Farnsworth, Larissa Albantakis & Tancredi Caruso
The concept of function arises at all levels of biological study and is often loosely and variously defined, especially within ecology. This has led to ambiguity, obscuring the common structure that unites levels of biological organisation, from mol- ecules to ecosystems. Here we build on already successful ideas from molecular biology and complexity theory to create a precise definition of biological function which spans levels of biological organisation and can be quantified in the unifying...

Data from: Are attractive male crickets better able to pay the costs of an immune challenge?

Clint D. Kelly, Melissa S. C. Telemeco, Lyric C. Bartholomay & Melissa S.C. Telemeco
Reproduction and immunity are fitness-related traits that trade-off with each other. Parasite-mediated theories of sexual selection suggest, however, that higher-quality males should suffer smaller costs to reproduction-related traits and behaviours (e.g., sexual display) from an immune challenge because these males possess more resources with which to deal with the challenge. We used Gryllus texensis field crickets to test the prediction that attractive males should better maintain the performance of fitness-related traits (e.g., calling effort) in...

Data from: Long-term avian community response to housing development at the boundary of U.S. protected areas: effect size increases with time

Eric M. Wood, Anna M. Pidgeon, Volker C. Radeloff, David P. Helmers, Patrick D. Culbert, Nicholas S. Keuler & Curtis H. Flather
1. Biodiversity conservation is a primary function of protected areas. However, protected areas also attract people, and therefore, land use has intensified at the boundaries of these lands globally. In the USA, since the 1970s, housing growth at the boundaries (<1 km) of protected areas has increased at a rate far higher than on more distant private lands. Here, we designed our analyses to address our central hypothesis that increasing housing density in and near...

Data from: Assessing faculty professional development in STEM higher education: sustainability of outcomes

Terry L. Derting, Heather A. Passmore, Timothy P. Henkel, Bryan Arnold, Jessica Middlemis Maher & Diane Ebert-May
We tested the effectiveness of Faculty Institutes for Reforming Science Teaching IV (FIRST), a professional development program for postdoctoral scholars, by conducting a study of program alumni. Faculty professional development programs are critical components of efforts to improve teaching and learning in the STEM (Science, Technology, Engineering, and Mathematics) disciplines, but reliable evidence of the sustained impacts of these programs is lacking. We used a paired design in which we matched a FIRST alumnus employed...

Data from: Managing individual nests promotes population recovery of a top predator

Jennyffer Cruz, Steve K. Windels, Wayne E. Thogmartin, Shawn M. Crimmins, Leeland H. Grim & Benjamin Zuckerberg
Threatened species are managed using diverse conservation tactics implemented at multiple scales ranging from protecting individuals, to populations, to entire species. Individual protection strives to promote recovery at the population- or species-level, although this is seldom evaluated. After decades of widespread declines, bald eagles, Haliaeetus leucocephalus, are recovering throughout their range due to legal protection and pesticide bans. However, like other raptors, their recovery remains threatened by human activities. Bald eagle nests are commonly managed...

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