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Hitting a moving target: Microbial evolutionary strategies in a dynamic ocean [article]

Nathan G. Walworth, Emily J. Zakem, John P. Dunne, Sinead Collins, Naomi M. Levine
2019 bioRxiv   pre-print
Here we investigated the interplay between physical and biological timescales using a model of adaptation and an eddy-resolving ocean circulation climate model.  ...  Our results suggest that organisms with faster growth rates are better positioned to adapt to rapidly changing ocean conditions and that more variable environments will favor a bet-hedging, low-beta-strategy  ...  A faster tHT would increase the fraction with a >1.  ... 
doi:10.1101/637272 fatcat:26js3f4aznh63bxuqqikzkrk3u


Richard A. Dunn, Nathan W. Tefft
2013 Health Economics  
We develop a model of alcohol consumption that incorporates the negative biological relationship between body mass and inebriation conditional on total alcohol consumption.  ...  We also thank seminar participants at Texas A&M University and Sam Houston State University. This research was supported by the National Institutes of Health under Ruth L.  ...  ¼ Wrp U qx þ U xx ∂x ∂q ∂A=∂W Wr À A W 2 r ! þ U x rp so that ∂A=∂W Wr À A W 2 r !  ... 
doi:10.1002/hec.2991 pmid:24038409 pmcid:PMC4135023 fatcat:hsdzwjgpfrexrddbfxua56jphi

Reproductive phenologies in a diverse temperate ant fauna

2007 Ecological Entomology  
This study examined the timing of nuptial flights, the synchronicity of nuptial flights (as a potential index of mating strategy), and variation in nuptial flights with elevation and among years in a diverse  ...  Flights were relatively synchronous within species for nearly all species considered, but synchronicity did not appear to be a robust estimate of overall mating strategy. 4.  ...  R.R.D. and N.J.S. were supported by the University of Tennessee and by a Discover Life in America Grant.  ... 
doi:10.1111/j.1365-2311.2006.00839.x fatcat:esh72zrm5bbireguoishuml5ae

Ant-mediated seed dispersal in a warmed world

Katharine L. Stuble, Courtney M. Patterson, Mariano A. Rodriguez-Cabal, Relena R. Ribbons, Robert R. Dunn, Nathan J. Sanders
2014 PeerJ  
A. Ellison and N. Gotelli were integral in 318 developing and improving this project.  ...  Temperature at which seeds were removed as a function of a species' ).  ...  For the purposes 115 of this study we are combining A. rudis, A. picea, and A. carolinensis into the A. rudis complex 116 due to the difficultly of identifying these closely related species in the field  ... 
doi:10.7717/peerj.286 pmid:24688863 pmcid:PMC3961163 fatcat:mm55dwlmuzcdral2tzfdxr7rby

Dog Ownership and Dog Walking

Susan L. Dunn, Michael Sit, Holli A. DeVon, Devynn Makidon, Nathan L. Tintle
2018 Journal of Cardiovascular Nursing  
This is a simple and potentially effective way to increase physical activity in a high-risk population. patients who do not own dogs?  ...  The STHS is a 23-item (10 state, 13 trait) instrument measured on a 4-point Likert-type scale (1 = strongly disagree, 4 = strongly agree).  ... 
doi:10.1097/jcn.0000000000000418 pmid:28489725 fatcat:msme6l4tdralzdonetgytx26t4

Microbial communities respond to experimental warming, but site matters

Melissa A. Cregger, Nathan J. Sanders, Robert R. Dunn, Aimée T. Classen
2014 PeerJ  
DOE PER award (DEFG02-08ER64510) and a National Science Foundation Dimensions of Biodiversity grant (NSF-1136703) to NJ Sanders and RR Dunn.  ...  M Cregger was supported by a DOE GREF Fellowship and the Department of Ecology and Evolutionary Biology at the University of Tennessee.  ...  Each chamber has a ±20 cm oak tree in the center of the chamber to serve as a thermal storage mass in order to avoid a cold core in the middle of the chamber.  ... 
doi:10.7717/peerj.358 pmid:24795850 pmcid:PMC4006228 fatcat:5dldeqveozfvvmwarr5vyhnuhm

Protein Kinase A: A Master Kinase of Granulosa Cell Differentiation

Pawan Puri, Lynda Little-Ihrig, Uma Chandran, Nathan C. Law, Mary Hunzicker-Dunn, Anthony J. Zeleznik
2016 Scientific Reports  
Activation of protein kinase A (PKA) by follicle stimulating hormone (FSH) transduces the signal that drives differentiation of ovarian granulosa cells (GCs) .  ...  We compared signaling pathways and gene expression profiles of GCs stimulated with FSH or expressing PKA-CQR, a constitutively active mutant of PKA.  ...  Nathan Law was supported by National Institute of Health Training Grant T32GM083864.  ... 
doi:10.1038/srep28132 pmid:27324437 pmcid:PMC4914995 fatcat:rld63qgyj5dtxlaszyn3zzp52u

Alcohol-Related Motor Vehicle Crash Risk and the Location of Alcohol Purchase

Chad Cotti, Richard A. Dunn, Nathan Tefft
2013 Social Science Research Network  
Thus, policies that shift consumption away from bars and restaurants could lead to a decline in the number of motor vehicle crashes. 3  ...  In this study, we examine how the probability of driving after a binge-drinking episode varies with the location of consumption and type of alcohol consumed.  ...  a couple of hours after this occasion?".  ... 
doi:10.2139/ssrn.2323001 fatcat:xq5pgyx4lzftfcj3a7wjg37y5u

Towards Custom-topology Tracks For Probing Myosin Motor Dynamics

Hendrik Dietz, Nathan D. Derr, Alex Dunn, James A. Spudich, William M. Shih
2009 Biophysical Journal  
Prostate apoptosis response-4 (Par-4) is a protein that has primarily been connected with apoptotic processes. Recently, we have shown that Par-4 also plays a role in smooth muscle contractility.  ...  LC20 phosphorylation assays using the proximity ligation assay revealed that overexpression of Par-4 and a phosphorylation site mutant of Par-4 (T155A), but not a leucine-zipper defective mutant (L3A),  ...  Derr 1 , Alex Dunn 2 , James A. Spudich 2 , William M.  ... 
doi:10.1016/j.bpj.2008.12.588 fatcat:47wr6w64brdi5pzf436mbdksgu

Effects of Treefall Gap Disturbances on Ant Assemblages in a Tropical Montane Cloud Forest

Margaret Patrick, David Fowler, Robert R. Dunn, Nathan J. Sanders
2012 Biotropica  
We sampled leaf litter ant assemblages and estimated a suite of abiotic parameters in 12 large (>80-m 2 ) treefall gaps across a chronosequence and in 12 paired adjacent intact forest sites in the Monteverde  ...  While most studies have focused on the responses of plant species and communities to gap formation, in this study, we consider the effects of treefall gap disturbances on leaf litter ant assemblages in a  ...  assemblages (Dunn 2004 , Palladini et al. 2007 .  ... 
doi:10.1111/j.1744-7429.2012.00855.x fatcat:4vl65tix5bfaddqmqel4o5tr6m

Predicting future coexistence in a North American ant community

Sharon Bewick, Katharine L. Stuble, Jean-Phillipe Lessard, Robert R. Dunn, Frederick R. Adler, Nathan J. Sanders
2014 Ecology and Evolution  
Specifically, we consider a well-studied ant community in North America. First, we use historical data to parameterize a basic model for species coexistence.  ...  For example, in the context of a community, it is not necessarily the most heatsensitive species that are most at risk.  ...  over the summer (Talbot 1943b; Tschinkel 1987; Dunn et al. 2007 hierarchy in the community (Lynch et al. 1980; Lessard et al. 2009; Stuble et al. 2013a) , and many of the necessary rate parameters can  ... 
doi:10.1002/ece3.1048 pmid:24963378 pmcid:PMC4063477 fatcat:6et466aaxnaw5ftrzgtctzmsu4

The Dow is Killing Me: Risky Health Behaviors and the Stock Market

Chad D. Cotti, Richard A. Dunn, Nathan Tefft
2013 Social Science Research Network  
Cotti, Dunn, and Tefft (2012) report that total monthly household expenditures in the NHCPD are lower for higher levels of the unemployment rate, consistent with a negative income effect.  ...  We follow Cotti, Dunn, and Tefft (2012) in using household-level clustering since they demonstrate that the relationship between household-level alcohol purchases and the business cycle are nearly identical  ... 
doi:10.2139/ssrn.2202418 fatcat:xk3jmwvh3zemdjyv5qemyjzkvm

Interactions in a warmer world: effects of experimental warming, conspecific density, and herbivory on seedling dynamics

Melissa A. Burt, Robert R. Dunn, Lauren M. Nichols, Nathan J. Sanders
2014 Ecosphere  
Dunn and N. J. Sanders. M. A. Burt received additional support from the Department of Ecology and Evolutionary Biology at the University of Tennessee.  ...  ACKNOWLEDGMENTS We thank A. T. Classen, D. Simberloff, and D. Buckley for comments on earlier versions of this manuscript. We also thank E. Boller, L. Bostic, C. Hirsch, J. Markham, K. Stuble, and S.  ...  Additionally, a study on the relative effects of mosquito larvae in a pitcher plant community shows a similar positive relationship between temperature and top-down processes (Hoekman 2010) .  ... 
doi:10.1890/es13-00198.1 fatcat:yfzzzw7rzrfvjava2bhkqhcuwe

Circuit Optimization Predicts Dynamic Network for Chemosensory Orientation in the Nematode C. elegans

Nathan A. Dunn, John S. Conery, Shawn R. Lockery
2003 Neural Information Processing Systems  
Here, we used an optimization algorithm to search for patterns of connectivity sufficient to compute the sensorimotor transformation underlying C. elegans chemotaxis, a simple form of spatial orientation  ...  neuron with a self-connection: τ i dA i (t) dt = w ii A i (t) − A i (t) + h(t) (5) where h(t) represents a generic external input (sensory or synaptic).  ...  = w ij A i (t) − A j (t) (7) We solved this system for the case where the external input h(t) = M sin(Ωt).  ... 
dblp:conf/nips/DunnCL03 fatcat:2gnefptworchpnub4xo7ncvqia

Tigecycline for Treatment of Pneumonia and Empyema Caused by Carbapenemase-ProducingKlebsiella pneumoniae

Michael W Daly, David J Riddle, Nathan A Ledeboer, W. Michael Dunne, David J Ritchie
2007 Pharmacotherapy  
., Nathan A. Ledeboer, Ph.D., W. Michael Dunne, Ph.D., and David J. Ritchie, Pharm.D.  ...  Ledeboer and Dunne), Washington University School of Medicine, St. Louis, Missouri. Address reprint requests to David J.  ... 
doi:10.1592/phco.27.7.1052 pmid:17594211 fatcat:5rivfblh2jdxfgwcyrklgw5exa
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