Modeling and Monitoring Submerged Prehistoric Sites during Offshore Sand Dredging and Implications for the Study of Early Holocene Coastal Occupation of Southern CaliforniaJohn Hildebrand & Andrew York
Beach sand dredging projects off the coast of San Diego County in Southern California provide data for improved understanding of the strategraphic setting for early Holocene sediments and the potential for offshore presence of buried archaeological materials. Geophysical data, core sediments, and analysis of recovered fossils allowed models to be developed for six offshore borrow sites within drown river valleys. These site-specific models were tested during dredging operations, and the dredge spoil was monitored for...
Cryptic species that are morphologically similar co-occur because either the rate of competitive exclusion is very slow, or because they are not, in fact, ecologically similar. The processes that maintain cryptic local diversity may, therefore, be particularly subtle and difficult to identify. Here, we uncover differences among several cryptic species in their relative abundance across a depth gradient within a dominant and ecologically important genus of hard coral, Pocillopora. From extensive sampling unbiased towards morphological...
Recovery from hybrid breakdown reveals a complex genetic architecture of mitonuclear incompatibilitiesThiago Lima, Ricardo Pereira, Ronald Burton, Tessa Pierce & Lin Chao
Reproductive isolation is often achieved when genes that are neutral or beneficial in their genomic background become functionally incompatible in a foreign genome, causing inviability, sterility or low fitness in hybrids. Recent studies suggest that mitonuclear interactions are among the initial incompatibilities to evolve at early stages of population divergence across taxa. Yet, the genomic architecture of mitonuclear incompatibilities has rarely been elucidated. We employ an experimental evolution approach starting with low-fitness F2 interpopulation hybrids...
Contemporary earthquake hazard models hinge on an understanding of how strain is distributed in the crust and the ability to precisely detect millimeter-scale deformation over broad regions of active faulting. Satellite radar observations revealed hundreds of previously unmapped linear strain concentrations (or fractures) surrounding the 2019 Ridgecrest earthquake sequence. We documented and analyzed displacements and widths of 169 of these fractures. Although most fractures are displaced in the direction of the prevailing tectonic stress (prograde),...
Data from: New approaches to ceramic use and discard: cooking pottery from the Peruvian Andes in ethnoarchaeological perspectiveJohn A. Hildebrand & Melissa B. Hagstrum
Ethnoarchaeological data from contemporary Wanka villages in the Mantaro Valley of the Peruvian Andes provide new perspectives on the use and discard of ceramic cooking vessels. We present a regional survey of ceramic vessel use and discard with household consumption as the focus of study. A mathematical model determines vessel uselife from the age distribution of in-use vessels. We examine the number of vessels per household, their volume, their uselife, and their reported discard. A...
Production and use of proteins is under strong selection in microbes, but it is unclear how proteome-level traits relate to ecological strategies. We identified and quantified proteomic traits of eukaryotic microbes and bacteria through an Antarctic phytoplankton bloom using in situ metaproteomics. Different taxa, rather than different environmental conditions, formed distinct clusters based on their ribosomal and photosynthetic proteomic proportions, and we propose that these characteristics relate to ecological differences. We defined and used a...
This dataset provides the necessary data to test for niche conservatism as demonstrated in the article "Niche conservatism in copepods between ocean basins; 10.1111/ecog.05690". Our study examined niche conservatism (i.e. a species' niche remains stable in space and time) between populations of the same species of marine copepod in different ocean basins. We used two approaches to test for niche conservatism which can be defined as a Princpial Component Analysis (PCA) and Environmental Niche Model...
HARP Echolocation click and broadband anthropogenic event detections Southern California Bight: 2017-2019 sites E and HKaitlin Frasier
This dataset consists of approximatly 80 thousand impulsive detections identified within underwater acoustic recordings collected in the Southern California Bight. These events consist primarily of toothed whale echolocation clicks. Manual labels are provided.
Analyzing coastal fog effects on carbon and water fluxes in a California agricultural system using approaches in biometeorology, remote sensing, and plant physiologySara Baguskas, Andrew Oliphant, Rachel Clemesha & Michael Loik
In coastal California, the peak growing season of economically important crops is concurrent with fog events, which buffer drought stress during the dry season. Coastal fog patterns are changing, so we quantified its effects on the energy, water, and carbon fluxes of an economically important cropland at multiple spatial and temporal scales. Our study site was a strawberry farm located in the fog-belt of the Salinas Valley, California. We used GOES-satellite total albedo to detect...
A dataset of nearly 400 measurements of the particle size distribution (PSD) compiled from the Pacific, Atlantic, and Arctic Oceans is used to examine variability in the magnitude and shape of the PSD, and to characterize the partitioning of particle number, cross-sectional area, and volume concentration among defined size intervals. The results indicate that the relative contributions of three size classes based upon the pico-, nano-, and microplankton size range exhibit substantial changes among measures...
Scripps Institution of Oceanography10
University of Washington1
The Hong Kong University of Science and Technology1
University of California, San Diego1
University of Hawaii at Manoa1
Jet Propulsion Lab1
University of California, Santa Cruz1
Marine Biological Association of the United Kingdom1