40 Works

Price-Level Targeting and Inflation Expectations: Experimental Evidence

Robert Amano, Engle-Warnick Jim & Malik Shukayev
In this paper, we use an economics decision-making experiment to test a key assumption underpinning the efficacy of price-level targeting relative to inflation targeting for business cycle stabilization and mitigating the effects of the zero lower bound on nominal interest rates. In particular, we attempt to infer whether experimental participants understand the stationary nature of the price level under price-level targeting by observing their inflation forecasting behaviour in a laboratory setting. This is an important...

Data from: Northwest range shifts and shorter wintering period of an Arctic seabird in response to four decades of changing ocean climate

Allison Patterson, Grant Gilchrist, Anthony Gaston & Kyle Elliott
Climate change is altering the marine environment at a global scale, with some of the most dramatic changes occurring in Arctic regions. These changes may affect the distribution and migration patterns of marine species throughout the annual cycle. Species distribution models have provided detailed understanding of the responses of terrestrial species to climate changes, often based on observational data; biologging offers the opportunity to extend those models to migratory marine species that occur in marine...

Data: the complex ecology of genitalia: gonopodium length and allometry in the Trinidadian guppy

José Jonathas P R De Lira
Male genitalia present an extraordinary pattern of rapid divergence in animals with internal fertilization, which is usually attributed to sexual selection. However, the effect of ecological factors on genitalia divergence could also be important, especially so in animals with non-retractable genitalia because of their stronger interaction with the surrounding environment in comparison to animals with retractable genitalia. Here we examine the potential of a pervasive ecological factor (predation) to influence the length and allometry of...

Synchronized file of allele frequencies for: Using seasonal genomic changes to understand historical adaptation to new environments: parallel selection on stickleback in highly-variable estuaries

Alan Garcia-Elfring, Rowan Barrett, Andrew Hendry, Timothy Thurman, Eric Palkovacs, Ben Wasserman & Antoine Paccard
Parallel evolution is considered strong evidence for natural selection. However, few studies have investigated the process of parallel selection as it plays out in real time. The common approach is to study historical signatures of selection in populations already well adapted to different environments. Here, to document selection under natural conditions, we study six populations of threespine stickleback (Gasterosteus aculeatus) inhabiting bar-built estuaries that undergo seasonal cycles of environmental changes. Estuaries are periodically isolated from...

High tree diversity enhances light interception in tropical forests

Marina Melo Duarte, Caroline Isaac Ferreira Zuim, Taísi Bech Sorrini, Luís Eduardo Bernardini, Rafael De Andrade Moral, Joannes Guillemot, Catherine Potvin, Wagner Hugo Bonat, José Luiz Stape & Pedro Henrique Santin Brancalion
We used two forest plantation experiments, the Sardinilla site in Panama (containing monocultures, 2-, 3- and 5-species mixtures in the main plantation, established in 2001, and 6-, 9- and18-species mixtures in the high-diversity plantation, established in 2003), and the Anhembi site in Brazil (established in 2006, containing 20-, 58- and 114-species mixtures), to investigate the effects of forest tree richness on the amount and distribution (horizontal, vertical and temporal) of intercepted ligh (red:far-red ratio -...

Source pool diversity and proximity shape the compositional uniqueness of insular mammal assemblages worldwide

Katherine Hébert, Virginie Millien & Jean-Philippe Lessard
Islands have been the test bed of several theories in community ecology, biogeography, and evolutionary biology. Progress within these disciplines has given a more comprehensive and mechanistic understanding of the processes governing variation in species richness among islands. However, it remains unclear whether these same processes also explain variation in species and phylogenetic composition among islands. Integrating theory from ecology and biogeography, we infer the roles of dispersal, selection, and stochasticity on the composition of...

The cell adhesion molecule Sdk1 shapes assembly of a retinal circuit that detects localized edges

Pierre-Luc Rochon, Catherine Theriault, Aline Giselle Rangel Olguin & Arjun Krishnaswamy
Nearly 50 different mouse retinal ganglion cell (RGC) types sample the visual scene for distinct features. RGC feature selectivity arises from its synapses with a specific subset of amacrine (AC) and bipolar cell (BC) types, but how RGC dendrites arborize and collect input from these specific subsets remains poorly understood. Here we examine the hypothesis that RGCs employ molecular recognition systems to meet this challenge. By combining calcium imaging and type-specific histological stains we define...

Association of fluorescent protein pairs and its significant impact on fluorescence and energy transfer - data

Jacob R Pope, Rachel L Johnson, W David Jamieson, Harley L Worthy, Senthilkumar Kailasam, Rochelle D Ahmed, Ismail Taban, Husam Sabah Auhim, Daniel W Watkins, Pierre J Rizjallah, Oliver K Castell & D Dafydd Jones
Data set for the above titled paper. Protein crystal structure data has been deposited seperately in the PDB under the accession code 5ni3. The data set includes the data that comprise the absorbance and fluoresence spectra and various in silico models.

Supplemental material: Astrocyte biomarkers in Alzheimer’s disease: a systematic review and meta-analysis

Bruna Bellaver, João Pedro Ferrari-Souza, Lucas Uglione Da Ros, Stephen F. Carter, Elena Rodriguez-Vieitez, Agneta Nordberg, Luc Pellerin, Pedro Rosa-Neto, Douglas Teixeira Leffa & Eduardo R. Zimmer
Objective: To perform a systematic review and meta-analysis to determine whether fluid and imaging astrocyte biomarkers are altered in Alzheimer's disease (AD). Methods: PubMed and Web of Science databases were searched for articles reporting fluid or imaging astrocyte biomarkers in AD. Pooled effect sizes were determined with mean differences (SMD) using the Hedge’s G method with random-effects to determine biomarker performance. Adapted questions from QUADAS-2 were applied for quality assessment. A protocol for this study...

DNA sequences of transgenes detected via environmental DNA (raw ABI files, processed FASTA files, and reference alignments)

Charles Xu, Claire Ramsay, Mitra Cowan, Mehrnoush Dehghani, Paul Lasko & Rowan Barrett
We demonstrate that simple, non-invasive environmental DNA (eDNA) methods can detect transgenes of genetically modified (GM) animals from terrestrial and aquatic sources in invertebrate and vertebrate systems. We detected transgenic fragments between 82-234 bp through targeted PCR amplification of environmental DNA extracted from food media of GM fruit flies (Drosophila melanogaster), feces, urine, and saliva of GM laboratory mice (Mus musculus), and aquarium water of GM tetra fish (Gymnocorymbus ternetzi). With rapidly growing accessibility of...

Data to Prior exposure to stress allows the maintenance of an ecosystem cycle following severe acidification

Sofia Van Moorsel, Justin Marleau, Andrew Gonzalez, Owen Petchey, Charles Bazerghi & Jorge Negrin Dastis
This freshwater mesocosm study was conducted in 19 out of 110 mesocosms at the Large Experimental Array of Ponds (LEAP) at the Gault Nature Reserve in Mont-St-Hilaire, QC, Canada (45°32' N, 73°08' W, 122 m a.s.l.) between May and October 2018 for a total of 147 days. On 24 May 2018, the mesocosms (1100L stock tanks, Rubbermaid, Huntersville, NC, USA) were filled with approximately 1000 liters of unfiltered lake water via a pipeline from oligotrophic...

Mass spectrometry of natively decorated doublet microtubule from Tetrahymena thermophila WT and mutants

Khanh Huy Bui, Daniel Dai, Ichikawa Muneyoshi, Kubo Shintaroh & Shun Kai Yang
Cilia are thin microtubule-based protrusions of eukaryotic cells. The swimming of ciliated protists and sperm cells is propelled by the beating of cilia. Cilia propagate the flow of mucus in the trachea and protect the human body from viral infections. The main force generators of ciliary beating are the outer dynein arms (ODAs) which attach to the doublet microtubules. The bending of cilia is driven by the ODAs' conformational changes caused by ATP hydrolysis. Here,...

Data for: Environmental and anthropogenic constraints on animal space use drive extinction risk worldwide

Myriam R. Hirt, Andrew D. Barnes, Alessandro Gentile, Laura J. Pollock, Benjamin Rosenbaum, Wilfried Thuiller, Marlee A. Tucker & Ulrich Brose
Animals require a certain amount of habitat to persist and thrive, and habitat loss is one of the most critical drivers of global biodiversity decline. While habitat requirements have been predicted by relationships between species traits and home range size, little is known about constraints imposed by environmental conditions and human impacts on a global scale. Our meta-analysis of 395 vertebrate species shows that global climate gradients in temperature and precipitation exert indirect effects via...

Data & R code for: Paquette & Hargreaves 'Biotic interactions are more often important at species' warm vs. cool range edges'

Anna Hargreaves
Predicting which ecological factors constrain species distributions is a fundamental ecological question and critical to forecasting geographic responses to global change. Darwin hypothesized that abiotic factors generally impose species’ high-latitude and high-elevation (typically cool) range limits, whereas biotic interactions more often impose species’ low-latitude/low-elevation (typically warm) limits, but empirical support has been mixed. Here, we clarify three predictions arising from Darwin’s hypothesis, and show that previously mixed support is partially due to researchers testing different...

Data from: Does pollen limitation limit plant ranges? Evidence and implications

Emma Dawson-Glass & Anna Hargreaves
Sexual reproduction often declines towards range edges, reducing fitness, dispersal, and adaptive potential at range edges. For plants, sexual reproduction is frequently limited by inadequate pollination. While case studies show that pollen limitation can limit plant distributions, the extent to which pollination commonly declines toward plant range edges is unknown. Here, we leverage global databases of pollen-supplementation experiments and plant occurrence data to test whether pollen limitation increases toward plant range edges, using a phylogenetically...

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