184 Works

Astrometry with MCAO at Gemini and at ELTs

Tobias Fritz, Nitya Kallivayalil, Eleazar R. Carrasco, Benoit Neichel, Richard Davies, Rachael Beaton, Dylan Angell, Sean Linden, Paul Zivick, Steve Majewski, Gulliermo Damke, Mike Boylan-Kolchin, Roeland Van Der Marel & Tony Sohn

Maximum Likelihood Estimate of Payoffs from Time Series

Jacopo Magnani, Daniel Friedman & Barry Sinervo
We fit the data to a structural model estimated via maximum likelihood (ML) techniques. The model in the matlab code joins discrete time replicator dynamics with a stochastic structure, given by the Dirichlet distribution or, alternatively, by the logistic distribution.

Fumigant use on California strawberry fields, 2004-2013

Julie Guthman
This dataset contains an analysis of chemical fumigant usage for nine major strawberry producing counties in California from 2004 to 2013. Five counties are production counties; four are nursery counties. Raw data on all pesticide applications on a county basis was collected from California's Pesticide Use Reporting System and filtered by pesticide category (fumigant) and commodity (strawberry). These data are geo-coded by Township-Range-Section. The data set also contains pivot tables and charts that show trend...

Microsatellite genotypes and extraction plate positions from publication: Genetic structure across urban and agricultural landscapes reveals evidence of resource specialization and philopatry in the Eastern carpenter bee, Xylocopa virginica L.

Kimberly Ballare & Shalene Jha
Human activity continues to impact global ecosystems, often by altering the habitat suitability, persistence, and movement of native species. It is thus critical to examine the population genetic structure of key ecosystem-service providers across human-altered landscapes to provide insight into the forces that limit wildlife persistence and movement across multiple spatial scales. While some studies have documented declines of bee pollinators as a result of human-mediated habitat alteration, others suggest that some bee species may...

Data from: Krill hotspot formation and phenology in the California Current Ecosystem

Jerome Fiechter
In the California Current Ecosystem (CCE), krill represent a key link between primary production and higher trophic level species owing to their central position in the food web and tendency to form dense aggregations. However, the strongly advective circulation associated with coastal upwelling may spatiotemporally decouple the occurrence and persistence of krill hotspots from phytoplankton biomass and nutrient sources. Results from a physical-biological model provide insights into fundamental mechanisms controlling the phenology of krill hotspots...

Ant-scale mutualism increases scale infestation, decreases folivory, and disrupts biological control in restored tropical forests

Andy Kulikowski
Ant-hemipteran mutualisms can have positive and negative effects on host plants depending on the level of hemipteran infestation and plant protection conferred by ants against folivory. Differential effects of such mutualisms on plant survival are well documented in undisturbed and ant-invaded systems, but few have explored how anthropogenic disturbance affects interactions between hemipterans and native ant species and what the consequences may be for recovering ecosystems. Within a fragmented landscape in Costa Rica, restored tropical...

Walruses produce intense impulse sounds by clap-induced cavitation during breeding displays

Colleen Reichmuth & Ole Næsbye Larsen
Male walruses produce the longest continuous reproductive displays known in the animal kingdom to convey their individual fitness to potential rivals, and possibly to potential mates. Here we document the ability of a captive walrus to produce intense, rhythmic sounds through a non-vocal pathway involving deliberate, regular collision of the fore flippers. High-speed videography linked to an acoustic onset marker revealed sound production through cavitation, with the acoustic impulse generated by each forceful clap exceeding...

Winter-run Chinook salmon resource selection function 2020

Peter Dudley
We use historic aerial redd surveys of Sacramento River winter-run Chinook salmon, coupled with 2D hydraulic modeling, and apply multivariable polynomial, logistic regression to calculate spawning resource selection functions (RSFs) based on water velocity and depth, and examine their interactions with water temperature. Our methods resulted in univariate and multivariate resource selection functions with interactions between both velocity and depth preference with changing temperature. Preferred depth increased and preferred velocity decreased with increasing temperature.

Exploring the effects of invasion on plant morphology of purple loosestrife (Lythrum salicaria)

Alexander Krohn, Caroline DeVan, Lizz Waring & Liz Shea
This dataset is for use in the Couse-based Undergraduate Research Experience (CURE) titled Effects of Invasion on Plant Morphology of Purple Loosestrife (Lythrum salicaria). The dataset is meant to be used as a practice, or ready-to-use dataset for instructors so that all instructors can start from the same point with the same data. If you would like to download additional data, or use a species other than L. salicaria, please visit the CUREnet website and...

Data from: Leaf litter arthropod responses to tropical forest restoration

Rebecca J. Cole, Karen D. Holl, Rakan A. Zahawi, Philipp Wickey & Alan R. Townsend
Soil and litter arthropods represent a large proportion of tropical biodiversity and perform important ecosystem functions, but little is known about the efficacy of different tropical forest restoration strategies in facilitating their recovery in degraded habitats. We sampled arthropods in four 7‐ to 8‐year‐old restoration treatments and in nearby reference forests. Sampling was conducted during the wet and dry seasons using extractions from litter and pitfall samples. Restoration treatments were replicated in 50 × 50‐m...

Data from: Scale-dependent effects of forest restoration on Neotropical fruit bats

J. Leighton Reid, Chase D. Mendenhall, Rakan A. Zahawi & Karen D. Holl
Neotropical fruit bats (family Phyllostomidae) facilitate forest regeneration on degraded lands by dispersing shrub and tree seeds. Accordingly, if fruit bats can be attracted to restoration sites, seed dispersal could be enhanced. We surveyed bat communities at 10 sites in southern Costa Rica to evaluate whether restoration treatments attracted more fruit bats if trees were planted on degraded farmlands in plantations or island configurations versus natural regeneration. We also compared the relative influence of tree...

Predicting the population consequences of acoustic disturbance, with application to an endangered gray whale population

Elizabeth McHuron, Elizabeth McHuron, Lisanne Aerts, Glenn Gailey, Olga Sychenko, Daniel Costa, Marc Mangel & Lisa Schwarz
Acoustic disturbance is a growing conservation concern for wildlife populations because it can elicit physiological and behavioral responses that can have cascading impacts on population dynamics. State-dependent behavioral and life history models implemented via Stochastic Dynamic Programming (SDP) provide a natural framework for quantifying biologically meaningful population changes resulting from disturbance by linking environment, physiology, and metrics of fitness. We developed an SDP model using the endangered western gray whale (Eschrichtius robustus) as a case...

Parallel evolution of phenological isolation across the speciation continuum in serpentine-adapted annual wildflowers

Shelley Sianta & Kathleen Kay
Understanding the relative importance of reproductive isolating mechanisms across the speciation continuum remains an outstanding challenge in evolutionary biology. Here we examine a common isolating mechanism, reproductive phenology, between plant sister taxa at different stages of adaptive divergence to gain insight into its relative importance during speciation. We study 17 plant taxa that have independently adapted to inhospitable serpentine soils, and contrast each with a nonserpentine sister taxon to form pairs at either ecotypic or...

Photographs from subglacial conduit under Hansbreen, Svalbard

Kenneth D. Mankoff

Supporting data for Loik et al. 2017 Wavelength-Selective Solar Photovoltaic Systems: Powering greenhouses for plant growth at the food-energy-water nexus. Earth's Future

Michael Loik
Global renewable electricity generation capacity has rapidly increased in the past decade. Increasing the sustainability of electricity generation and the market share of solar photovoltaics (PV) will require continued cost reductions or higher efficiencies. Wavelength-Selective Photovoltaics (WSPVs) combine luminescent solar cell technology with conventional Silicon-based PV, thereby increasing efficiency and lowering the cost of electricity generation. WSPVs absorb some of the blue and green wavelengths of the solar spectrum but transmit the remaining wavelengths that...

Monitoring data from a managed aquifer recharge system that collects stormwater runoff in central coastal California. Precipitation, runoff, infiltration, sediment, survey

Sarah Beganskas & Andrew Fisher
Groundwater is increasingly important for satisfying California’s growing fresh water demand. Strategies like managed aquifer recharge (MAR) can improve groundwater supplies, mitigating the negative consequences of persistent groundwater overdraft. Distributed stormwater collection (DSC) MAR projects collect and infiltrate excess hillslope runoff before it reaches a stream, focusing on 40–400 ha drainage areas (100–1000 ac). We present results from six years of DSC–MAR operation—including high resolution analyses of precipitation, runoff generation, infiltration, and sediment transport—and discuss...

PSF reconstruction for AO photometry and astrometry

Joana Ascenso, Benoit Neichel, Manuel Silva, Thierry Fusco & Paulo Garcia

Prototyping the GMT phasing camera with the Magellan AO system

Derek Kopek, Brian McLeod, Kenneth McCracken, Marcos Van Dam, Antonin Bouchez, Alan Conder, William Podgorski, Daniel Catropa, Stuart McMuldroch, Laird Close, Jared Males, Katie Morzinski & Timothy Norton

Use of Laser Guide Star with Pyramid Wavefront Sensor

Celia Blain, Simone Esposito, Alfio Puglisi, Guido Agapito & Enrico Pinna

Wavefront control simulations for the Giant Magellan Telescope: Field-dependent segment piston control

Fernando Quiros-Pacheco, Rod Conan, Brian McLeod, Ben Irarrazaval & Antonin Bouchez

A Fresnel propagation analysis for SPEED (Segmented Pupil Experiment for Exoplanet Detection)

Mathilde Beaulieu, Lyu Abe, Patrice Martinez, Carole Gouvret, Frantz Martinache, Oliver Preis, Julien Dejonghe & Farrokh Vakili

Multi-conjugate Adaptive Optics at Big Bear Solar Observatory

Dirk Schmidt, Nicolas Gorceix, Xianyu Zhang, Jose Marino, Phil Goode, Thomas Rimmele & Thomas Berkefeld

XAO at LBT: current performances in the visible and upcoming upgrade

Enrico Pinna, Fernando Pedichini, Simone Esposito, Mauro Centrone, Alfio Puglisi, Jacopo Farinato, Luca Carbonaro, Guido Agapito, Marco Stangalini, Armando Riccardi, Marco Xompero, Runa Briguglio, Philip Hinz, Vanessa Bailey & Manny Montoya

Design and Development Status of MKID Integral Field Spectrographs for High Contrast Imaging

Seth Meeker, Benjamin Mazin, Rebecca Jensen-Clem, Alex Walter, Paul Szypryt, Matthew Strader & Clint Bockstiegel

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