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Back from the brink: Estimating daily and annual abundance of natural-origin salmon smolts from 30-years of mixed-origin capture-recapture data
Evaluating the status and trends of natural-origin anadromous fish populations over time requires robust estimates of out-migrating juvenile abundance. Information on abundance is typically acquired by capturing actively migrating fish as they pass stationary monitoring platforms. Challenges to estimation include protracted migration timing, temporally varying capture probabilities and the contemp
Authors
Dalton Hance, John Plumb, Russell Perry, Kenneth Tiffan
Modeling the mid-piacenzian warm climate using the water isotope-enabled Community Earth System Model (iCESM1.2-ITPCAS)
The mid-Piacenzian Warm Period (MPWP, ~ 3.264–3.025 Ma) is the most recent example of a persistently warmer climate in equilibrium with atmospheric CO2 concentrations similar to today. Towards studying patterns and dynamics of a warming climate the MPWP is often compared to today. Following the Pliocene Model Intercomparison Project, Phase 2 (PlioMIP2) protocol we prepare a water isotope-enabled C
Authors
Yong Sun, Baohuang Su, Harry J. Dowsett, Haibin Wu, Jun Hu, Christian Stepanek, Zhongyu Xiong, Xiayu Yuan, Gilles Ramstein
Viability modeling for decision support with limited data: A lizard case study
Plateau spot-tailed earless lizards, Holbrookia lacerata, are a species of ground lizard in central Texas that are under review for listing as endangered under the US Endangered Species Act, but heretofore no predictive models of population dynamics or viability have been developed. We used limited available data and published demographic rates in a PVA model to predict future status of these liza
Authors
Ashley B.C. Goode, Nathan Allan, Conor P. McGowan
Thermo-hydrologic processes governing supra-permafrost talik dynamics in discontinuous permafrost near Umiujaq (Québec, Canada)
Widespread supra-permafrost talik formation is
currently recognized as a critical mechanism that
could accelerate permafrost thaw in the Arctic
(e.g., Connon et al. 2018; Farquharson et al. 2022).
However, the trajectory of permafrost dynamics
following talik formation may prove difficult to predict.
Physically-based cryohydrogeologic models provide
a powerful tool for understanding processes and
Authors
Philippe Fortier, Nathan Young, Michelle A. Walvoord, Jean-Michel Lemieux, Aaron Mohammed
A history of cryohydrogeology modeling and recent advancements through the integration of solute transport
Groundwater flow systems and permafrost are interrelated because permafrost thaw enhances permeability, while groundwater flow can advect heat and accelerate permafrost thaw (McKenzie et al. 2021). Given amplified climate change in cold regions, there is renewed interest in ‘cryohydrogeology’, the study of groundwater in cold regions. Many data-driven studies have shown that permafrost thaw is lea
Authors
Barret L. Kurylyk, Julia Guimond, Aaron Mohammed, Victor F. Bense, Jeffrey M. McKenzie, Michelle A. Walvoord, Rob Jamieson, R. Bailey Strong
Thermal and hydrological limitations on modeling carbon dynamics at wetland sites of discontinuous and continuous permafrost extent
Accurate representation of cryohydrological processes is fundamental for biosphere models, particularly at high-latitudes, given their influence on carbon and permafrost dynamics in carbon-rich peatlands and wetlands. This study analyzes site-level simulations in moist and wet drainage conditions in continuous or discontinuous permafrost regions, using a terrestrial ecosystem model DVM-DOS-TEM. Fu
Authors
Benjamin C. Maglio, Ruth Rutter, Tobey Carman, Colin W. Edgar, Eugénie S. Euskirchen, Hélène Genet, Andrew Mullen, Valeria Briones, Elchin Jafarov, Kristen L. Manies
Amur Falcon Falco amurensis
No abstract available.
Authors
Jaume Orta, Guy M. Kirwan, Jeffrey S. Marks, Ryan C. Burner, Sundev Gombobaatar, Paul van Els, Chuenchom Hansasuta
Iron oxyhydroxide-rich hydrothermal deposits at the high-temperature Fåvne vent field, Mohns Ridge
The recently discovered Fåvne vent field, located at 3,040 m depth on the slow-spreading Mohns mid-ocean ridge between Greenland and Norway, is a high-temperature (≥250°C) vent field that is characterized by Fe oxyhydroxide-rich and S-poor chimneys and mounds. The vent field is located on both the hanging wall and footwall of a normal fault with a ∼1.5 km throw that forms the western edge of the ∼
Authors
Caroline Gini, John Jamieson, Eoghan P. Reeves, Amy Gartman, Thibaut Barreyre, Michael G. Babechuk, Steffen L. Jørgensen, Katleen Robert
Projected sea-level rise and high tide flooding at De Soto National Memorial, Florida
IntroductionNational parks and preserves in the South Atlantic-Gulf Region contain valuable coastal habitats such as tidal wetlands and mangrove forests, as well as irreplaceable historic buildings and archeological sites located in low-lying areas. These natural and cultural resources are vulnerable to accelerated sea-level rise and escalating high tide flooding events. Through a Natural Resource
Authors
Hana R. Thurman, Nicholas M. Enwright, Michael J. Osland, Davina L. Passeri, Richard H. Day, Bethanie M. Simons
Dissolved arsenic concentrations in surface waters within the upper portions of the Klamath River Basin, Oregon and California
Arsenic toxicity is an environmental health problem. Levels of arsenic in surface waters at some locations in the Klamath River Basin in southern Oregon and northern California can exceed the U.S. Environmental Protection Agency (EPA) standard for drinking water. There are both anthropogenic and natural sources of arsenic. The Klamath River Basin consists primarily of volcanic deposits and contain
Authors
Marie Noële Croteau, Brent R. Topping, Rick A. Carlson
System characterization report on the Gaofen-6
Executive SummaryGaofen-6 represents a series of Chinese high-resolution Earth observation satellites. More than 12 satellites have been launched in the Gaofen series, beginning with Gaofen-1 in 2013. Satellites within the series have varying infrared, radar, and optical imaging capabilities. The primary goal for the satellites in this series is to provide near real-time observations for climate c
Authors
Aparajithan Sampath, Jon Christopherson, Seonkyung Park, Minsu Kim, Gregory L. Stensaas, Cody Anderson
Distribution, abundance, and breeding activities of the Least Bell's Vireo at Marine Corps Base Camp Pendleton, California—2020 annual report
Executive SummaryThe purpose of this report is to provide the Marine Corps with an annual summary of abundance, breeding activity, demography, and habitat use of endangered Least Bell’s Vireos (Vireo bellii pusillus) at Marine Corps Base Camp Pendleton (MCBCP, or Base). Surveys for the Least Bell's Vireo were conducted at MCBCP, California, between April 1 and July 10, 2020. Core survey areas and
Authors
Suellen Lynn, Michelle Treadwell, Barbara E. Kus