13 Works

Data from: Root responses to elevated CO2, warming, and irrigation in a semi-arid grassland: integrating biomass, length, and life span in a 5‐year field experiment

Kevin E. Mueller, Daniel R. LeCain, M. Luke McCormack, Elise Pendall, Mary Carlson & Dana M. Blumenthal
1.Plant roots mediate the impacts of environmental change on ecosystems, yet knowledge of root responses to environmental change is limited because few experiments evaluate multiple environmental factors and their interactions. Inferences about root functions are also limited because root length dynamics are rarely measured. 2.Using a five‐year experiment in a mixed‐grass prairie, we report the responses of root biomass, length, and lifespan to elevated carbon dioxide (CO2), warming, elevated CO2 and warming combined, and irrigation....

Data from: Soil organic carbon stability in forests: distinct effects of tree species identity and traits

Gerrit Angst, Kevin E. Mueller, David M. Eissenstat, Susan Trumbore, Katherine H. Freeman, Sarah E. Hobbie, Jon Chorover, Jacek Oleksyn, Peter B. Reich & Carsten W. Mueller
Rising atmospheric CO2 concentrations have increased interest in the potential for forest ecosystems and soils to act as carbon (C) sinks. While soil organic C contents often vary with tree species identity, little is known about if, and how, tree species influence the stability of C in soil. Using a 40‐year‐old common garden experiment with replicated plots of eleven temperate tree species, we investigated relationships between soil organic matter (SOM) stability in mineral soils and...

Water availability dictates how plant traits predict demographic rates

Alice Stears, Peter Adler, Dana Blumenthal, Julie Kray, Kevin Mueller, Troy Ocheltree, Kevin Wilcox & Daniel Laughlin
A major goal in ecology is to make generalizable predictions of organism responses to environmental variation based on their traits. However, straightforward relationships between traits and fitness are rare and likely vary with environmental context. Characterizing how traits mediate demographic responses to the environment may enhance predictions of organism responses to global change. We synthesized 15 years of demographic data and species-level traits in a shortgrass steppe to determine whether the effects of leaf and...

Reproducibility Paper Data: Data and analysis package for the draft manuscript that assesses reporting and reproducibility across a cohort of literature-based knee modeling studies. The package contains the raw data, which are the reviews performed by the KneeHub team members, and the corresponding statistical analysis.

Jason Halloran, Neda Abdollahi Nohouji, Mhd Ammar Hafez, Thor Besier, Snehal Chokhandre, Shady Elmasry, Donald Hume, Carl Imhauser, Nynke Rooks, Marco Schneider, Ariel Schwartz, Kevin Shelburne, William Zaylor & Ahmet Erdemir
Reproducible research serves as a pillar of the scientific method and is a foundation for scientific advancement. However, estimates for irreproducibility of preclinical science range from 75% to 90%. The importance of reproducible science has not been assessed in the context of mechanics-based modeling of human joints such as the knee, despite this being an area that has seen dramatic growth. Framed in the context of five experienced teams currently documenting knee modeling procedures, the...

Data from: Trading water for carbon in the future: effects of elevated CO2 and warming on leaf hydraulic traits in a semiarid grassland

Kevin Mueller, Dana Blumenthal, Troy Ocheltree & Julie Kray
The effects of climate change on plants and ecosystems are mediated by plant hydraulic traits, including interspecific and intraspecific variability of trait phenotypes. Yet, integrative and realistic studies of hydraulic traits and climate change are rare. In a semiarid grassland, we assessed the response of several plant hydraulic traits to elevated CO2 (+200 ppm) and warming (+1.5 to 3℃; day to night). For leaves of five dominant species (three graminoids, two forbs), and in replicated...

Data from: Mek1 down regulates Rad51 activity during yeast meiosis by phosphorylation of Hed1

Tracy L. Callender, Raphaelle Laureau, Lihong Wan, Xiangyu Chen, Rima Sandhu, Saif Laljee, Sai Zhou, Ray T. Suhandynata, Evelyn Prugar, William A. Gaines, YoungHo Kwon, G. Valentin Börner, Alain Nicolas, Aaron M. Neiman & Nancy M. Hollingsworth
During meiosis, programmed double strand breaks (DSBs) are repaired preferentially between homologs to generate crossovers that promote proper chromosome segregation at Meiosis I. In many organisms, there are two strand exchange proteins, Rad51 and the meiosis-specific Dmc1, required for interhomolog (IH) bias. This bias requires the presence, but not the strand exchange activity of Rad51, while Dmc1 is responsible for the bulk of meiotic recombination. How these activities are regulated is less well established. In...

Data from: Advancing risk assessment: mechanistic dose–response modelling of Listeria monocytogenes infection in human populations

Ashrafur Rahman, Daniel Munther, Aamir Fazil, Ben Smith & Jianhong Wu
The utility of characterizing the effects of strain variation and individual/subgroup susceptibility on dose-response outcomes has motivated the search for new approaches beyond the popular use of the exponential dose-response model for listeriosis. While descriptive models can account for such variation, they have limited power to extrapolate beyond the details of particular outbreaks. In contrast, this study exhibits dose-response relationships from a mechanistic basis, quantifying key biological factors involved in pathogen-host dynamics. An efficient computational...

Data from: Abandoning sex: multiple origins of asexuality in the ciliate Tetrahymena

F Paul Doerder
Background: By segregating somatic and germinal functions into large, compound macronuclei and small diploid micronuclei, respectively, ciliates can explore sexuality in ways other eukaryotes cannot. Sex, for instance, is not for reproduction but for nuclear replacement in the two cells temporarily joined in conjugation. With equal contributions from both conjugants, there is no cost of sex which theory predicts should favor asexuality. Yet ciliate asexuality is rare. The exceptional Tetrahymena has abandoned sex through loss...

Shortgrass steppe and northern mixedgrass prairie plant species traits

Dana Blumenthal, Julie Kray, Kevin Mueller & Troy Ocheltree
Despite progress in trait-based ecology, there is limited understanding of the plant traits that structure semiarid grasslands. In particular, it remains unclear how traits that enable plants to cope with water limitation are related to traits that influence other key functions such as herbivore defense and growth. The hypothesis that drought and herbivory exert convergent selection pressures is supported for morphological traits, but largely untested for struct­ural, physiological, and phenological traits. Drought and economic traits...

Data from: A synopsis of the genus Cypholoba Chaudoir (Coleoptera, Carabidae, Anthiini) known to occur in the Republic of South Africa

Jonathan R. Mawdsley, Terry L. Erwin, Hendrik Sithole, Alice S. Mawdsley, Jonathan Mawdsley, Terry Erwin & Alice Mawdsley
Nearly one third of the described species of Cypholoba Chaudoir (Coleoptera: Carabidae) are known to inhabit the Republic of South Africa. A key and diagnostic notes are provided for their identification, as well as notes about way of life for some of the species based on observations in the Kruger National Park. Fifteen species and subspecies of the genus are recorded from the Republic of South Africa; adult specimens of each species and subspecies are...

Data from: A tale of two studies: detection and attribution of the impacts of invasive plants in observational surveys

Kevin E. Mueller, Alexandra G. Lodge, Alexander M. Roth, Timothy J. S. Whitfeld, Sarah E. Hobbie & Peter B. Reich
1.Short-term experiments cannot characterize how long-lived, invasive shrubs influence ecological properties that can be slow to change, including native diversity and soil fertility. Observational studies are thus necessary, but often suffer from methodological issues. 2.To highlight ways of improving the design and interpretation of observational studies that assess the impacts of invasive plants, we compare two studies of nutrient cycling and earthworms along two separate gradients of invasive shrub abundance. By considering the divergent sampling...

Data from: Elevated CO2 and water addition enhance nitrogen turnover in grassland plants with implications for temporal stability

Feike A. Dijkstra, Yolima Carrillo, Dana M. Blumenthal, Kevin E. Mueller, Daniel R. LeCain, Jack A. Morgan, Tamara J. Zelikova, David G. Williams, Ronald F. Follett, Elise Pendall & Dan R. LeCain
Temporal variation in soil nitrogen (N) availability affects growth of grassland communities that differ in their use and reuse of N. In a seven-year-long climate change experiment in a semiarid grassland, the temporal stability of plant biomass production varied with plant N turnover (reliance on externally acquired N relative to internally recycled N). Species with high N turnover were less stable in time compared to species with low N turnover. In contrast, N turnover at...

Data from: Development of circadian oscillators in neurosphere cultures during adult neurogenesis

Astha Malik, Roudabeh J. Jamasbi, Roman V. Kondratov & Michael E. Geusz
Circadian rhythms are common in many cell types but are reported to be lacking in embryonic stem cells. Recent studies have described possible interactions between the molecular mechanism of circadian clocks and the signaling pathways that regulate stem cell differentiation. Circadian rhythms have not been examined well in neural stem cells and progenitor cells that produce new neurons and glial cells during adult neurogenesis. To evaluate circadian timing abilities of cells undergoing neural differentiation, neurospheres...

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  • Cleveland State University
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  • University of Minnesota
  • United States Department of Agriculture
  • Colorado State University
  • University of Wyoming
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  • Utah State University
  • Polish Academy of Sciences
  • Texas A&M University