72 Works

Data from: New forms of structure in ecosystems revealed with the Kuramoto model

John Vandermeer
This is the general Mathematica code for the article, "New forms of structure in ecosystems revealed with the Kuramoto model" by Vandermeer, Hajian-Forooshani, Medina and Perfecto. All results presented in the article can be obtained by running the code with appropriate parameter settings.

Tuiteamos o pongamos un tuit? Investigating the Social Constraints of Loanword Integration in Spanish Social Media

Ian Stewart, Diyi Yang & Jacob Eisenstein

Real-Time Forecasts of the Real Price of Oil

Christiane Baumeister & Lutz Kilian
We construct a monthly real-time data set consisting of vintages for 1991.1-2010.12 that is suitable for generating forecasts of the real price of oil from a variety of models. We document that revisions of the data typically represent news, and we introduce backcasting and nowcasting techniques to fill gaps in the real-time data. We show that real-time forecasts of the real price of oil can be more accurate than the no-change forecast at horizons up...

Behavioural plasticity in a native species is related to foraging resilience in the presence of an aggressive invader

Marian Wong, Melinda Keiller, Laura Lopez & Kai Paijmans
Competition between invasive and native species can result in exploitation of resources by the invader, reducing foraging rates of natives. However, it is increasingly recognised that multiple factors can enhance the resilience of native species competing for limiting resources with invaders. Although extensively studied in terrestrial species, little research has focused on behavioural plasticity in the aquatic realm and how this influences native species resilience. Here we examined the role of behavioural plasticity in interactions...

Habitat structure mediates vulnerability to climate change through its effects on thermoregulatory behavior

Lauren Neel, Michael Logan, Daniel Nicholson, Christina Miller, Albert Chung, Inbar Maayan, Zach Degon, Madeline DuBois, John David Curlis, Q Taylor, Kaitlin Keegan, Owen McMillan, Jonathan Losos & Christian Cox
Tropical ectotherms are thought to be especially vulnerable to climate change because they are thermal specialists, having evolved in aseasonal thermal environments. However, even within the tropics, habitat structure can influence opportunities for behavioral thermoregulation. Open (and edge) habitats likely promote more effective thermoregulation due to the high spatial heterogeneity of the thermal landscape, while forests are thermally homogenous and may constrain opportunities for behavioral buffering of environmental temperatures. Nevertheless, the ways in which behavior...

Too Many Cooks Spoil the Broth: Toward a Theory for How the Tragedy of the Anticommons Emerges in Organizations

Matthew McCarter, Shirli Kopelman, Thomas Turk & Candace Ybarra

Data from: Long-term trends in the occupancy of ants revealed through use of multi-sourced datasets

Julie Sheard, Carsten Rahbek, Robert Dunn, Nathan Sanders & Nick Isaac
We combined participatory science data and museum records to understand long-term changes in occupancy for 29 ant species in Denmark over 119 years. Bayesian occupancy modelling indicated change in occupancy for 15 species: five increased, four declined and six showed fluctuating trends. We consider how trends may have been influenced by life-history and habitat changes. Our results build on an emerging picture that biodiversity change in insects is more complex than implied by the simple...

Phylogenomics, introgression, and demographic history of South American true toads (Rhinella)

Danielle Rivera, Ivan Prates, Thomas Firneno, Miguel Rodrigues, Janalee Caldwell & Matthew Fujita
The effects of genetic introgression on species boundaries and how they affect species’ integrity and persistence over evolutionary time have received increased attention. The increasing availability of genomic data has revealed contrasting patterns of gene flow across genomic regions, which impose challenges to inferences of evolutionary relationships and of patterns of genetic admixture across lineages. By characterizing patterns of variation across thousands of genomic loci in a widespread complex of true toads (Rhinella), we assess...

Works and Days as a Transittional Text

Ruth Scodel

Living in the concrete jungle: carnivore spatial ecology in urban parks

Siria Gámez & Nyeema C. Harris
People and wildlife are living in an increasingly urban world, replete with unprecedented human densities, sprawling built environments, and altered landscapes. Such anthropogenic pressures can affect multiple processes within an ecological community, from spatial patterns to interspecific interactions. We tested two competing hypotheses, human shields versus human competitors, to characterize how humans affect the carnivore community using multi-species occupancy models. From 2017-2020, we conducted the first camera survey of city parks in Detroit, Michigan, and...

Phylogenetic conflicts, combinability, and deep phylogenomics in plants

Stephen Smith, Joseph Walker, Joseph Brown & Nathanael Hale
Studies have demonstrated that pervasive gene tree conflict underlies several important phylogenetic relationships where different species tree methods produce conflicting results. Here, we present a means of dissecting the phylogenetic signal for alternative resolutions within a dataset in order to resolve recalcitrant relationships and, importantly, identify what the dataset is unable to resolve. These procedures extend upon methods for isolating conflict and concordance involving specific candidate relationships and can be used to identify systematic error...

Comparison of adult census size and effective population size support the need for continued protection of two Solomon Island endemics

Sarah A. Cowles, Brian C. Weeks, Lindsey Perrin, Nancy Chen & J. Albert C. Uy
Because a population’s ability to respond to rapid change is dictated by standing genetic variation, we can better predict a population’s long-term viability by estimating and then comparing adult census size (N) and effective population size (Ne). However, most studies only measure N or Ne, which can be misleading. Using a combination of field and genomic sequence data, we here estimate and compare N and Ne in two range-restricted endemics of the Solomon Islands. Two...

Density, parasitism, and sexual reproduction are strongly correlated in lake Daphnia populations

Meghan A. Duffy, Camden D. Gowler, Mary A. Rogalski, Clara L. Shaw & Katherine K. Hunsberger
Many organisms can reproduce both asexually and sexually. For cyclical parthenogens, periods of asexual reproduction are punctuated by bouts of sexual reproduction, and the shift from asexual to sexual reproduction has large impacts on fitness and population dynamics. We studied populations of Daphnia dentifera to determine the amount of investment in sexual reproduction as well as the factors associated with variation in investment in sex. To do so, we tracked host density, infections by nine...

Dynamics in perioperative neutrophil-to-lymphocyte*platelet ratio as a predictor of early acute kidney injury following cardiovascular surgery

Yang Li, Zhouping Zou, Yunlu Zhang, Bowen Zhu, Yichun Ning, Bo Shen, Chunsheng Wang, Zhe Luo, Jiarui Xu & Xiaoqiang Ding
In this study, we applied a composite index of neutrophil-lymphocyte * platelet ratio (NLPR), and explore the significance of the dynamics of perioperative NLPR in predicting cardiac surgery-associated acute kidney injury (CSA-AKI). During July 1st and December 31th 2019, participants were prospectively derived from the ‘Zhongshan Cardiovascular Surgery Cohort’. NLPR was determined using neutrophil counts, lymphocyte and platelet count at the two-time points. Dose-response relationship analyses were applied to delineate the non-linear odds ratio (OR)...

Alternative Trading Systems: Does One Shoe Fit All?

Nicolas Audet, Toni Gravelle & Jing Yang
This paper examines the factors that lead liquidity-motivated investors to choose the type of market structure they prefer. We assume that investors can choose between a dealership and a limit-order-book market. This study builds a theoretical model for both the dealership and order-book markets and develops a numerical method to solve the Nash equiibrium strategies of heterogeneous market participants. We find that a dealership market would be preferred by investors in an environment where customer...

A Data-driven Approach to Crosslinguistic Structural Biases

Alex Kramer & Zoey Liu

Data from: A test for rate-coupling of trophic and cranial evolutionary dynamics in New World bats

Jeff Shi, Erin Westeen & Daniel Rabosky
Data supporting article Shi et al. 2021, Evolution: https://doi.org/10.1111/evo.14188 Morphological evolution is often assumed to be causally related to underlying patterns of ecological trait evolution. However, few studies have directly tested whether evolutionary dynamics of and major shifts in ecological resource use are coupled with morphological shifts that may facilitate trophic innovation. Using diet and multivariate cranial (microCT) data, we tested whether rates of trophic and cranial evolution are coupled in the radiation of New...

Migration distance is a fundamental axis of the slow-fast continuum of life history in boreal birds

Benjamin Winger & Teresa Pegan
Seasonal migration is intrinsically connected to the balance of survival and reproduction, but whether migratory behavior influences species’ position on the slow-fast continuum of life history is poorly understood. We found that boreal-breeding birds that migrate long distances exhibit higher annual adult survival and lower annual reproductive investment relative to co-distributed boreal species that migrate shorter distances to winter closer to their breeding grounds. Our study uses “vital rates” data on reproductive output and survivorship...

Genotypic variation in an ecologically important parasite is associated with host species, lake, and spore size

Clara Shaw, Rebecca Bilich, Bruce O'Brien, Carla Cáceres, Spencer Hall, Timothy James & Meghan Duffy
Genetic variation in parasites has important consequences for host-parasite interactions. Prior studies of the ecologically important parasite Metschnikowia bicuspidata have suggested low genetic variation in the species. Here, we collected M. bicuspidata from two host species (Daphnia dentifera and Ceriodaphnia dubia) and two regions (Michigan and Indiana, USA). Within a lake, outbreaks tended to occur in one host species but not the other. Using microsatellite markers, we identified six parasite genotypes grouped within three distinct...

Is the Discretionary Income Effect of Oil Price Shocks a Hoax?

Christiane Baumeister, Lutz Kilian & Xiaoqing Zhou
The transmission of oil price shocks has been a question of central interest in macroeconomics since the 1970s. There has been renewed interest in this question after the large and persistent fall in the real price of oil in 2014–16. In the context of this debate, Ramey (2017) makes the striking claim that the existing literature on the transmission of oil price shocks is fundamentally confused about the question of how to quantify the effect...

Data for Concordance-based approaches in phylogenomics

Joseph Walker, Stephen Smith, Edwige Moyroud & Richard Hodel
Gene tree conflict is common and finding methods to analyze and alleviate the negative effects that conflict has on species tree analysis is a crucial part of phylogenomics. This study aims to expand the discussion of inferring species trees and molecular branch lengths when conflict is present. Conflict is typically examined in two ways: inferring its prevalence, and inferring the influence of the individual genes (how strongly one gene supports any given topology compared to...

Supplement to: Sex and race differences in the risk of ischemic stroke associated with fasting blood glucose in REGARDS

Tracy Madsen, D. Leann Long, April P. Carson, George Howard, Dawn O. Kleindorfer, Karen L. Furie, JoAnn E. Manson, Simin Liu & Virginia J. Howard
Background: To investigate sex and race differences in the association between fasting blood glucose (FBG) and risk of ischemic stroke (IS). Methods: This prospective longitudinal cohort study included adults age ≥45 years at baseline in the Reasons for Geographic And Racial Differences in Stroke Study, followed for a median of 11.4 years. The exposure was baseline FBG (mg/dL); suspected IS events were ascertained by phone every 6 months and were physician-adjudicated. Cox proportional hazards were...

Is the age of plant communities predicted by the age, stability and soil composition of the underlying landscapes? An investigation of OCBILs

Maria Beatriz De Cortez, Ryan A Folk, Charles J Grady, Jonathan P Spoelhof, Stephen A Smith, Douglas E Soltis & Pamela S Soltis
Old, climatically buffered, infertile landscapes (OCBILs) have been hypothesized to harbour an elevated number of persistent plant lineages and are predicted to occur across different parts of the globe, interspersed with other types of landscapes. We tested whether the mean age of a plant community is associated with occurrence on OCBILs, as predicted by climatic stability and poor soil environments. Using digitized occurrence data for seed plants occurring in Australia (7033 species), sub-Saharan Africa (3990...

Functional traits reveal the dominant drivers of long‐term community change across a North American Great Lake

James Sinclair, Michael Fraker, James Hood, Kenneth Frank, Mark DuFour, Ann Marie Gorman & Stuart Ludsin
The datasets here were used to determine annual sentinel fish species and trait composition in Lake Erie's western and central basins during 1969-2018 in relation to multiple anthropogenic stressors. Here, we provide three datasets, which are used in the paper by Sinclair et al. titled: "Functional traits reveal the dominant drivers of long-term community change across a North American Great Lake". Each dataset is provided as a separate tab in a single Excel worksheet. The...

Individual recognition and individual identity signals in Polistes fuscatus wasps vary geographically

Elizabeth Tibbetts, Michelle Fearon, Meagan Simons, L. Lacey Knowles, Christian Cely Ortiz & Giorgia Auteri
Geographic variation in animal phenotypes is common, yet we know surprisingly little about how communication varies across populations. Instead, most communication research focuses on one or a few populations and assumes recognition behavior is consistent across a species’ range. Here, we show that individual identity signals and individual recognition vary across the geographic range of Polistes fuscatus wasps. P. fuscatus in MI and NY have variable facial patterns that signal individual identity and are used...

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Affiliations

  • University of Michigan-Ann Arbor
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  • University of Michigan–Ann Arbor
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  • Bank of Canada
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  • Minzu University of China
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