41 Works

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...

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 tri-axial accelerometer and gyroscope) and two iPhone 6 containing try-axial accelerometer, gyroscopes, and magnetometers. This data set is described in the paper: Flores, German, and Roberto Manduchi. "WeAllWalk: An Annotated Data Set of Inertial Sensor Time Series from Blind Walkers", Proceedings of the...

UVS Occultation Altimetry Code and Synthetic Data

Jacob Abrahams
This contains the code used to produce the figures in our UVS Occultation Altimetry manuscript, as well as the observation locations and synthetic data required to run the code. There are 9 .txt files, one is our nominal shape model, one is the set of chord ingress and egress points, three of them contain the locations of radar altimetric measurements for different truncation altitudes, and four of them contain precomputed lengths corresponding to our nominal...

Pluto and Charon limb profile topography

Jack Conrad
We derived updated and expanded topography datasets for Pluto and Charon. This is done through finding the body edge (i.e. the limb) in images, and with those body edge locations we can apply simple geographical techniques to produce limb profiles. The process involves some human intervention, but is primarily automation based. Our limb profile topography is useful for geologic and geophysical studies of Pluto and Charon. Additionally, we provide processed data of how we used...

Physical and biogeochemical drivers of alongshore pH and oxygen variability in the California Current System

Jerome Fiechter & Julia Cheresh
In the California Current System (CCS), the nearshore environment experiences natural exposure to low pH and reduced oxygen in response to coastal upwelling. Anthropogenic impacts further decrease pH and oxygen below biological thresholds, making the CCS particularly vulnerable to ocean acidification and hypoxia. Results from a coupled physical-biogeochemical model reveal a strongly heterogeneous alongshore pattern of nearshore pH and oxygen in the central CCS, both in their long-term means and trends. This spatial structuring is...

Runoff modeling of a coastal basin to assess variations in response to shifting climate and land use: Implications for managed recharge

Sarah Beganskas, Kyle Young, Andrew Fisher, Ryan Harmon & Sacha Lozano
We quantified hillslope runoff distribution in a coastal, mixed-use basin, the Pajaro Valley Drainage Basin (PVDB), under different climate and land use conditions, evaluating the potential for distributed stormwater collection coupled with managed aquifer recharge (DSC-MAR) to improve groundwater supply. We developed dry, normal, and wet climate scenarios using historic precipitation and temperature data, and we compared contemporary land use to pre-development land use by replacing developed areas in the model with plausible native vegetation...

Chemical shift-based methods in NMR structure determination

Santrupti Nerli, Andrew C. McShan & Nikolaos G. Sgourakis
Chemical shifts are highly sensitive probes that can be harnessed by NMR spectroscopists and structural biologists as conformational parameters to characterize a range of biological molecules. Traditionally, assignment of chemical shifts has been a labor-intensive process requiring numerous samples and a suite of multidimensional experiments. Over the past two decades, the development of complementary automated and computational approaches has bolstered the analysis, interpretation and utilization of chemical shifts for elucidation of high-resolution protein and nucleic...

Fractional crystallization of a Martian magma ocean and formation of a thermochemical boundary layer at the base of the mantle

Garrett Zeff
BurnMan and pMELTS outputs for simulations of fractionally crystallizing magma oceans on Mars.

Natural enemy-herbivore networks along local management and landscape gradients in urban agroecosystems

Stacy Philpott, Azucena Lucatero, Peter Bichier, Monika Egerer, Shalene Jha, Brenda Lin & Heidi Liere
Ecological networks can provide insight into how biodiversity loss and changes in species interactions impact the delivery of ecosystem services. In agroecosystems that vary in management practices, quantifying changes in ecological network structure across gradients of local and landscape composition can inform both the ecology and function of productive agroecosystems. In this study, we examined natural enemy-herbivore co-occurrence networks associated with Brassica oleracea (cole crops), a common crop in urban agricultural systems. Specifically, we investigated...

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...

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...

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...

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...

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 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 download the Data Download...

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...

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