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Mangrove reforestation provides greater blue carbon benefit than afforestation for mitigating global climate change
Significant efforts have been invested to restore mangrove forests worldwide through reforestation and afforestation. However, blue carbon benefit has not been compared between these two silvicultural pathways at the global scale. Here, we integrated results from direct field measurements of over 370 restoration sites around the world to show that mangrove reforestation (reestablishing mangroves w
Authors
Shanshan Song, Yali Ding, Wei Li, Yuchen Meng, Jianping Zhou, Ruikun Gou, Conghe Zhang, Shengbin Ye, Neil Saintilan, Ken Krauss, Stephen Crooks, Shuguo Lv, Guanghui Lin
Survey for selected parasites in Alaska brown bears (Ursus arctos)
To assess infection with or exposure to endo- and ectoparasites in Alaska brown bears (Ursus arctos), blood and fecal samples were collected during 2013–17 from five locations: Gates of the Arctic National Park and Preserve; Katmai National Park; Lake Clark National Park and Preserve; Yakutat Forelands; and Kodiak Island. Standard fecal centrifugal flotation was used to screen for gastrointestinal
Authors
Ellen Haynes, Sarah Coker, Michael J. Yabsley, Kevin Niedrighaus, Andrew M. Ramey, Guilherme Verocai, Grant Hilderbrant, Kyle Joly, Dave Gustine, Buck Mangipane, William Leacock, Anthony P. Crupi, Christopher A. Cleveland
Coherence among Oregon Coast coho salmon populations highlights increasing relative importance of marine conditions for productivity
Anadromous fishes, such as Pacific salmon, spend portions of their life cycle in freshwater and marine systems, thus rendering them susceptible to a variety of natural and anthropogenic stressors. These stressors operate at different spatiotemporal scales, whereby freshwater conditions are more likely to impact single populations or subpopulations, while marine conditions are more likely to act on
Authors
Melanie J. Davis, James Anthony, Eric J. Ward, Julie Firman, Chris Lorion
Changes in wildfire occurrence and risk to homes from 1990 through 2019 in the Southern Rocky Mountains, USA
Wildfires and housing development have increased since the 1990s, presenting unique challenges for wildfire management. However, it is unclear how the relative influences of housing growth and changing wildfire occurrence have altered risk to homes, or the potential for wildfire to threaten homes. We used a random forests model to predict burn probability in relation to weather variables at 1-km r
Authors
Todd Hawbaker, Paul D. Henne, Melanie K. Vanderhoof, Amanda R. Carlson, Miranda H. Mockrin, Volker C. Radeloff
High winds and melting sea ice trigger landward movement in a polar bear population of concern
Some animal species are responding to climate change by altering the timing of events like mating and migration. Such behavioral plasticity can be adaptive, but it is not always. Polar bears (Ursus maritimus) from the southern Beaufort Sea subpopulation have mostly remained on ice year-round, but as the climate warms and summer sea ice declines, a growing proportion of the subpopulation is summeri
Authors
Annie Kellner, Todd C. Atwood, David C. Douglas, Stewart Breck, George Wittemyer
Status and understanding of groundwater quality in the Redding–Red Bluff shallow aquifer study unit, 2019—California GAMA priority basin project
Groundwater quality in the north Sacramento Valley (NSV) was studied in the Redding–Red Bluff shallow aquifer study unit (referred to as the NSV shallow aquifer or NSV-SA) as part of the Priority Basin Project (PBP) of the California Groundwater Ambient Monitoring and Assessment (GAMA) Program. The study unit is in Shasta and Tehama Counties and included two physiographic study areas: (1) the Redd
Authors
Jennifer S. Harkness
Assessing the presence of current-use pesticides in mid-elevation Sierra Nevada streams using passive samplers, California, 2018–19
Passive sampler devices were deployed in six northern California streams five times between November 2018 and December 2019 to measure the presence or absence of current-use pesticides in surface water. In the targeted areas, there are reported pesticide uses for agriculture, commercial forestry, and rights of way maintenance along with unreported pesticide use at private residences and cannabis g
Authors
Matthew D. De Parsia, James L. Orlando, Michelle L. Hladik
Endangered Klamath suckers
Since Lost River suckers (Deltistes luxatus) and shortnose suckers (Chasmistes brevirostris) hatched in the early 1990s, almost none of the fish have survived to adulthood. When full grown, Lost River suckers are the largest of the Klamath suckers, averaging about two and a half feet long, whereas shortnose suckers are at around twenty-one inches. Rather than an inability to spawn, these species a
Authors
Summer M. Burdick
Using mercury stable isotope fractionation to identify the contribution of historical mercury mining sources present in downstream water, sediment and fish
Ecosystems downstream of mercury (Hg) contaminated sites can be impacted by both localized releases as well as Hg deposited to the watershed from atmospheric transport. Identifying the source of Hg in water, sediment, and fish downstream of contaminated sites is important for determining the effectiveness of source-control remediation actions. This study uses measurements of Hg stable isotopes in
Authors
Chris S. Eckley, Collin Eagles-Smith, Todd P Luxton, Joel C. Hoffman, Sarah E. Janssen
Earth science looks to outer space
Satellite data are revolutionizing coastal science. A study revealing how the El Niño/Southern Oscillation impacts coastal erosion around the Pacific Rim shows what is possible.
Authors
Patrick L. Barnard, Sean Vitousek
Pressurized upflow reactor system for the bioconversion of coal to methane: Investigation of the coal/sand interface effect
Microbial generation of coal bed methane (CBM) represents a significant source of natural gas on Earth. While biostimulation has been demonstrated in batch cultures, environmental parameters such as overburden pressure and formation water flow need to be tested at the laboratory scale to understand in situ potential. We designed and constructed a high-pressure (HP) flow-through reactor system that
Authors
Margaux Mesle, Logan H. Hodgskiss, Elliott Barnhart, Laura Dobeck, Joachim Eldring, Randy Hiebert, Alfred B. Cunningham, Robin Gerlach, Adrienne Phillips, Matthew W. Fields
Improving temporal frequency of Landsat surface temperature products using the gap-filling algorithm
Remotely sensed surface temperature (ST) has been widely used to monitor and assess landscape thermal conditions, hydrologic modeling, and surface energy balance. Landsat thermal sensors have continuously measured the Earth surface thermal radiance since August 1982. The thermal radiance measurements are atmospherically compensated and converted to Landsat STs and delivered as part of the U.S. Geo
Authors
George Z. Xian, Hua Shi, Saeed Arab, Chase Mueller, Reza Hussain, Kristi Sayler, Danny Howard