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First record of twin and triplet embryos found in the clutch of a wild Burmese python in southern Florida First record of twin and triplet embryos found in the clutch of a wild Burmese python in southern Florida
No abstract available.
Authors
Génesis Aponte Santiago, Judith E. Baird-Lujano, Jacquelyn C. Guzy, Derrick G. Biglin, John-Kaarli M. Rentof, George F. Bancroft, Christina M. Romagosa, Matthew McCollister, Kristen Hart
The role of fire on Earth The role of fire on Earth
Fire is a defining feature of our biosphere, having appeared when the first plants colonized the land, and it continues to occur across the planet at different frequencies and intensities. Fire has been and remains as an evolutionary force in many plant and animal lineages and contributes to explaining the variability of our biodiversity. Fire has also shaped the structure of many...
Authors
Juli G. Pausas, Jon Keeley, William J. Bond
Contrasting long-term trends in channel width and shoreline complexity Contrasting long-term trends in channel width and shoreline complexity
Drought and reservoir management in the Colorado River Watershed have decreased peak flows and sediment loads reducing the ability of rivers to change their channels. Multiple studies have documented the resulting decrease in channel width, but less attention has been paid to long-term trends in shoreline complexity, including the number and size of islands. We used a sequence of aerial
Authors
Elizabeth Rachaelann Skaggs, Jonathan M. Friedman, Christopher Holmquist-Johnson
Python Hyperspectral Analysis Tool (PyHAT) user guide Python Hyperspectral Analysis Tool (PyHAT) user guide
This report is a user guide for the 0.1.2 release of the Python Hyperspectral Analysis Tool (PyHAT) and its graphical user interface (GUI). The GUI is intended to provide an intuitive front end to allow users to apply sophisticated preprocessing and analysis methods to spectroscopic data. Though the PyHAT package has been developed with a particular focus on laser-induced breakdown...
Authors
Ryan B. Anderson, Itiya P. Aneece, Travis S.J. Gabriel
Near-surface material and topography generate anomalous high-frequency ground motion amplification in Chugiak, Alaska Near-surface material and topography generate anomalous high-frequency ground motion amplification in Chugiak, Alaska
An ∼3 km long nodal array oriented approximately east–west was deployed in Chugiak, Alaska, by the U.S. Geological Survey during 2021. The array intersects with the permanent NetQuakes station NP.ARTY, where peak ground acceleration (PGA) value of 1.98g was recorded during the 2018 Mw 7.1 Anchorage, Alaska, earthquake, in sharp contrast to the PGA of ∼0.3g at a site just 4 km to the west...
Authors
Te-Yang Yeh, Kim B. Olsen, Jamison Haase Steidl, Peter J. Haeussler
Using periodic matrix models to simulate the effectiveness of alternative reintroduction strategies for lizards on a seasonal tropical island Using periodic matrix models to simulate the effectiveness of alternative reintroduction strategies for lizards on a seasonal tropical island
Conservation translocations and reintroductions are widely used to improve conservation outcomes for declining species. Reintroductions are unlikely to be successful if the threats that led to the extirpation of the focal species, such as non-native predators, have not been ameliorated. The non-native brown treesnake (Boiga irregularis) was introduced to Guam in the mid-20th century and...
Authors
Jonathan P. Rose, Brian J. Halstead, Melia G. Nafus
The bat signal: An ultraviolet light lure to increase acoustic detection of bats The bat signal: An ultraviolet light lure to increase acoustic detection of bats
Bats are a taxa of high conservation concern and are facing numerous threats including widespread mortality due to White-Nose Syndrome (WNS) in North America. With this decline comes increasing difficulty in monitoring imperiled bat species due to lower detection probabilities of both mist-netting and acoustic surveys. Lure technology shows promise to increase detection while decreasing...
Authors
Samuel R. Freeze, Sabrina M. Deeley, Amber S. Litterer, J. Mark Freeze, W. Mark Ford
Spatial mapping of dissolved methane using an in situ sensor in Puget Sound Spatial mapping of dissolved methane using an in situ sensor in Puget Sound
Release of methane, as gas bubbles or in the dissolved phase, from the seafloor has been observed in coastal waters ( 1000 m). Methane dissolution within the water column affects the geochemistry of the surrounding water, leading to localized oxygen loss and potential escape to the atmosphere, particularly from shallower sites. Traditional methods for detecting and quantifying dissolved...
Authors
Alexandra M. Padilla, William Pardis, Jason Kapit, Tor A. Bjorklund, Nicholas D. Ward, Daniel J. Fornari, Susan Hautala, William F. Waite, H. Paul Johnson, Anna P. Michel
Home range, seasonality, and the importance of canopy cover for Texas Tortoises (Gopherus berlandieri) Home range, seasonality, and the importance of canopy cover for Texas Tortoises (Gopherus berlandieri)
Texas Tortoises (Gopherus berlandieri) are understudied compared to federally protected congeners. Despite important early studies on the basic ecology of G. berlandieri, quantitative identification of habitat associations with specific environmental conditions has been limited. Gopherus berlandieri inhabits Tamaulipan thornscrub across its range, and coastal populations are historically
Authors
Daniel A. Guerra, Todd C. Esque, Drew R. Davis, Joseph A. Veech
Revised marine bird collision and displacement vulnerability index for U.S. Pacific Outer Continental Shelf offshore wind energy development Revised marine bird collision and displacement vulnerability index for U.S. Pacific Outer Continental Shelf offshore wind energy development
The installation of offshore wind energy infrastructure (OWEI) at sea may affect marine birds by increasing the risk of mortality from collision with OWEI (Collision Vulnerability) and causing disturbance and displacement from important habitats (Displacement Vulnerability). In 2017, we published the first comprehensive database quantifying marine bird Collision Vulnerability and...
Authors
Emma C. Kelsey, Jonathan J. Felis, David M. Pereksta, Josh Adams
Collaborative drought science planning in the Colorado River Basin Collaborative drought science planning in the Colorado River Basin
The U.S. Geological Survey (USGS) is using collaborative, interdisciplinary planning to develop data and tools needed to optimize the management of water resources and land use by resource management agencies during an ongoing, multidecadal drought in the Colorado River Basin. The USGS Actionable and Strategic Integrated Science and Technology team works to build relationships with...
Authors
Patrick J. Anderson, Jeanne E. Godaire, Daniel K. Jones, William J. Andrews, Alicia A. Torregrosa, Meghan T. Bell, JoAnn M. Holloway, Molly A. Blakowski, Joseph A. Hevesi, Sharon L. Qi
Gravity and magnetic surveys of the Skaergaard intrusion, East Greenland Gravity and magnetic surveys of the Skaergaard intrusion, East Greenland
Aeromagnetic and gravity surveys of the Skaergaard intrusion in East Greenland were carried out in July–August 1971 as part of a grant to the University of Oregon Center for Volcanology to refine the models of crystallization and differentiation of the intrusion, specifically to test whether the intrusion is underlain by dense rocks of a reservoir 20 kilometers (km) thick (referred to as...
Authors
Mark E. Gettings