184 Works

D-raising in Chamorro relative clauses and other A′ constructions

Jake Wayne Vincent

Año Nuevo Island Animal Count: analyzing citizen science pinniped counts from drone imagery

Sarah Wood
Fluctuations in marine mammal abundance can reveal changes in local ecosystem health and inform conservation strategies. Unmanned aircraft systems (UAS) such as drones are increasingly being used to photograph and count marine mammals in remote locations; however, counting animals in images is a laborious task. Crowd-sourced science has the potential to considerably reduce the time required to conduct these censuses but must first be validated against expert counts to confirm accuracy. Our objectives were to...

Isotopic evidence for long-distance connections of the AD thirteenth century Promontory caves occupants

Jessica Metcalfe, John Ives, Sabrina Shirazi, Kevin Gilmore, Jennifer Hallson, Fiona Brock, Bonnie Clark & Beth Shapiro
The Promontory caves (Utah) and Franktown Cave (Colorado) contain high-fidelity records of short-term occupations by groups with material culture connections to the Subarctic/Northern Plains. This research uses Promontory and Franktown bison dung, hair, hide, and bone collagen to establish local baseline carbon isotopic variability and identify leather from a distant source. The ankle wrap of one Promontory Cave 1 moccasin had a δ13C value that indicates a substantial C4 component to the animal’s diet, unlike...

Birth timing after the long feeding migration in northern elephant seals

Richard Condit, Roxanne S. Beltran, Patrick W. Robinson, Daniel E. Crocker & Daniel P. Costa
A prominent phase of the annual cyle in migratory animals is the transition between migration and reproduction. The transition is a small part of the annual cycle, but details of its timing deserve attention. From a distant location, animals must initiate a long migration so that they arrive at the breeding ground on a precise schedule. Here we take advantage of a sample of female northern elephant seals that were tracked by satellite during their...

Field courses narrow demographic achievement gaps in ecology and evolutionary biology

Roxanne Beltran, Erin Marnocha, Alexandra Race, Don Croll, Gage Dayton & Erika Zavaleta
Disparities remain in the representation of marginalized students in STEM. Classroom-based experiential learning opportunities can increase student confidence and academic success; however, the effectiveness of extending learning to outdoor settings is unknown. Our objectives were to examine 1) demographic gaps in ecology and evolutionary biology (EEB) major completion, college graduation, and GPAs for students who did and did not enroll in field courses, 2) whether under-represented demographic groups were less likely to enroll in field...

Data associated with: Haze evolution in temperate exoplanet atmospheres through surface energy measurements

Xinting Yu
Photochemical hazes are important opacity sources in temperate exoplanet atmospheres, hindering current observations from characterizing exoplanet atmospheric compositions. The haziness of an atmosphere is determined by the balance between haze production and removal. However, the material-dependent removal physics of the haze particles is currently unknown under exoplanetary conditions. Here we provide experimentally-measured surface energies for a grid of temperate exoplanet hazes to characterize haze removal in exoplanetary atmospheres. We found large variations of surface energies...

Behavioral responses across a mosaic of ecosystem states restructure a sea otter-urchin trophic cascade

Joshua Smith, Joseph Tomoleoni, Michelle Staedler, Sophia Lyon, Jessica Fujii & Tim M. Tinker
Consumer and predator foraging behavior can impart profound trait-mediated constraints on community regulation that scale-up to influence the structure and stability of ecosystems. Here we demonstrate how the behavioral response of an apex predator to changes in prey behavior and condition can dramatically alter the role and relative contribution of top-down forcing, depending on the spatial organization of ecosystem states. In this study, a rapid and dramatic decline in the abundance of a meso-predator (Pycnopodia...

Soil nutrients

Karen Holl
Surface soil nutrients collected in 2007, 2012, 2017 from research plots described in Holl, K. D., J. L. Reid, R. J. Cole, F. Oviedo-Brenes, J. A. Rosales, and R. A. Zahawi. 2020. Applied nucleation facilitates tropical forest recovery: Lessons learned from a 15-year study. Journal of Applied Ecology 57:2316-2328 (https://doi.org/10.1111/1365-2664.13684).

Data from: Tropical forest restoration enriches vascular epiphyte recovery

John Leighton Reid, José Miguel Chaves-Fallas, Karen D. Holl & Rakan A. Zahawi
Vascular epiphytes constitute a large proportion of tropical forest plant biodiversity, but are among the slowest plants to recolonize secondary forests. We asked whether tree planting for ecological restoration accelerates epiphyte community recovery. Does the spatial configuration of tree planting matter? What landscape contexts are most suitable for epiphyte restoration? Location: Restored pastures in premontane Coto Brus County, Puntarenas, Costa Rica.

Data from: Rules of thumb for predicting tropical forest recovery

Karen D. Holl, John Leighton Reid, Federico Oviedo-Brenes, Andy J. Kulikowski & Rakan A. Zahawi
Natural regeneration is increasingly recognized as a potentially cost‐effective strategy to reach ambitious forest landscape restoration targets, but rates of recovery are notoriously variable. We asked how well initial habitat conditions after cessation of agriculture predict forest recovery after nearly a decade. We aimed to provide land managers with general rules of thumb to assess when it is necessary to invest resources in active restoration, such as tree planting, to accelerate forest recovery. Location: Coto...

Canopy cover data from: Applied nucleation facilitates tropical forest recovery

Karen D. Holl, J. Leighton Reid, Rebecca J. Cole, Federico Oviedo‐Brenes, Juan A. Rosales & Rakan A. Zahawi
Applied nucleation, mostly based upon planting tree islands, has been proposed as a cost‐effective strategy to meet ambitious global forest and landscape restoration targets. We review results from a 15‐year study, replicated at 15 sites in southern Costa Rica, that compares applied nucleation to natural regeneration and mixed‐species tree plantations as strategies to restore tropical forest. We have collected data on planted tree survival and growth, woody vegetation recruitment and structure, seed rain, litterfall, epiphytes,...

Photochemical model output data associated with: How to identify exoplanet surfaces using atmospheric trace species in hydrogen-dominated atmospheres

Xinting Yu
Sub-Neptunes (Rp~1.25-4 REarth) remain the most commonly detected exoplanets to date. However, it remains difficult for observations to tell whether these intermediate-sized exoplanets have surfaces and where their surfaces are located. Here we propose that the abundances of trace species in the visible atmospheres of these sub-Neptunes can be used as proxies for determining the existence of surfaces and approximate surface conditions. As an example, we used a state-of-the-art photochemical model to simulate the atmospheric...

The WeAllWalk Data Set

German Flores & Roberto Manduchi
This data set contains time series from inertial sensors carried by blind subjects walking through pre-determined routes In two buildings in the UCSC campus. The sensors include two MetaWear CPRO (obtaining a tai-axial accelerometer and gyroscope) and two iPhone 6 containing try-axial accelerometer, gyroscopes, and magnetometers.

Commissioning of ARGOS at LBT: adaptive optics procedures

Lorenzo Busoni, Marco Bonaglia, Jose Borelli, Matthias Deysenroth, Simone Esposito, Wolfgang Gaessler, Hans Gemperlein, Martin Kulas, Michael Lefebvre, Tommaso Mazzoni, Gilles Orban De Xivry, Diethard Peter, Alfio Puglisi, Walfried Raab, Sebastian Rabien, Gustavo Rahmer, Alex Sivitilli, Jesper Storm & Julian Ziegleder

Dissecting Star-forming regions with the GeMS MCAO instrument: lessons learned for optimal post-processing of WFAO data

Ana¨ıs Bernard, Benoit Neichel, Thierry Fusco, Laurent Mugnier, Sophie Bounissou, Manash Samal, Morten Andersen, Annie Zavagno & Henri Plana

Measuring Segment Piston with a Dispersed Fringe Sensor on the Giant Magellan Telescope

Marcos Van Dam, Brian McLeod & Antonin Bouchez

Estimating the outer scale in altitude - L0(h) - using the GeMS profiler

Andres Guesalaga, Benoit Neichel, Thiery Fusco, Javier Valenzuela, Slvain Oberti, Elena Masciadri, Carlos Coreia & Jean Francois Sauvage

Variation around the Pyramid theme: optical recombination and optimal use of photons

Olivier Fauvarque, Benoit Neichel, Thierry Fuso & Jean-Francois Savage

Dark Wavefront Sensing

Roberto Ragazzoni

OCAM2S: an integral shutter ultrafast and low noise wavefront sensor camera for laser guide stars adaptive optics systems

Jean-Luc Gach, Philippe Feautrier, Tristan Buey, Gerard Rousset, Eric Gendron, Tim Morris, Alastair Basden, Richard Myers, Fabrice Vidal & Fanny Chemla

System analysis of the Segmented Pupil Experiment for Exoplanet Detection - SPEED - in view of the ELTs

Olivier Preis, Patrice Martinez, Carole Gouvret, Julien Dejonghe, Mathilde Beaulieu, Pierre Janin-Potiron, Alain Spang, Frantz Martinache, Yan Fantei-Caujolle, Aurelie Marcotto, Lyu Abe & Marcel Carbillet

GMCAO for E-ELT: a feasibility study

Valentina Viotto, Maria Bergomi, Elisa Portaluri, Marco Dima, Jocopo Farinato, Davide Greggio, Demetrio Magrin & Roberto Ragazzoni

Processing of external SLODAR turbulence profile measurements to support adaptive optics performance predictions

Tim Butterley, Richard Wilson & Marc Sarazin

Registration Year

  • 2021
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Resource Types

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  • University of California, Santa Cruz
  • Organization For Tropical Studies
  • Organization for Tropical Studies
  • Missouri Botanical Garden
  • Stanford University
  • The University of Texas at Austin
  • University of San Francisco
  • Seattle University
  • Virginia Tech
  • University of Costa Rica