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A cross-site comparison of ecosystem- and plot-scale methane fluxes across multiple sites A cross-site comparison of ecosystem- and plot-scale methane fluxes across multiple sites
Wetland and upland ecosystems play significant but opposing roles in the global methane (CH4) budget, acting as natural sources and sinks, respectively. Two of the most common approaches for measuring CH4 fluxes (FCH4) are chambers, which measure fluxes at fine spatial scales (ca. 1 m2), and eddy covariance (EC) towers, which integrate fluxes across larger footprints (ca. 100–10 000 m2)...
Authors
Tiia Määttä, Ankur R. Desai, Masahito Ueyama, Rodrigo Vargas, Eric J. Ward, Zhen Zhang, Gil Bohrer, Kyle Delwiche, Etienne Fluet-Chouinard, Järvi Järveoja, Sara H. Knox, Lulie Melling, Mat B. Nilsson, Matthias Peichl, Angela Che Tang, Eeva-Stiina Tuittila, Jinsong Wang, Sheel Bansal, Sarah Feron, Manuel Helbig, Aino Korrensalo, Karen W. Krauss, Gavin McNicol, Shuli Niu, Zutao Ouyang, Kathleen Savage, Oliver Sonnentag, Robert Jackson, Avni Malhotra
Conflicts and collisions with an endangered carnivore: Landscape drivers and spatial risk pattern Conflicts and collisions with an endangered carnivore: Landscape drivers and spatial risk pattern
Human–wildlife conflicts and anthropogenic mortality are expected to increase with the continuous encroachment on natural habitats within and around protected areas, yet the processes governing these risks remain poorly understood. We investigated the spatiotemporal dynamics and drivers of two distinct processes involving the endangered Florida panther (Puma concolor coryi; hereafter...
Authors
Marta Prat-Guitart, David P. Onorato, James E. Hines, Madan K. Oli
Non-destructive sampling of larval amphibians shows tail tissues reflect whole-body methylmercury concentrations and trophic-related differences in bioaccumulation Non-destructive sampling of larval amphibians shows tail tissues reflect whole-body methylmercury concentrations and trophic-related differences in bioaccumulation
Mercury (Hg), and specifically methylmercury (MeHg), is a contaminant of global concern to humans and wildlife, but there is still limited understanding of its effects on many taxa. Amphibians are closely associated with water, where Hg is converted to MeHg, and high concentrations of MeHg can reduce survival of amphibians in the wild. However, limited non-lethal proxies exist for...
Authors
Brian J. Tornabene, Blake Hossack, Daniel A. Grear, Thomas L. Anderson, Brad Glorioso, Hardin Waddle, Jon D Davenport, Collin Eagles-Smith, Caitlin T. Rumrill, Kelly L. Smalling
Weathering the ride: Associations of heat, smoke, precipitation, and ozone with bus ridership in Colorado Weathering the ride: Associations of heat, smoke, precipitation, and ozone with bus ridership in Colorado
Weather and climate variability increasingly shape urban travel behavior, yet the short-term temporal dynamics and contextual modifiers of weather-transit relationships remain poorly understood. We analyzed system-wide hourly bus ridership in the Denver metropolitan area from June 2022 through September 2023 using fixed-effects negative binomial distributed lag nonlinear models with lags...
Authors
Priyanka deSouza, Elizabeth A. Dzwonczyk, Peter Christian Ibsen, Adam M. Lippert, Carl Green, T.C. Chakraborty, Melissa R. McHale, Peter Anthamatten, Ebru Altintas, Carrie Makarewicz
Tectonically driven integration of the 4.8 Ma Colorado River USA tracked with detrital sanidine and fish genetics Tectonically driven integration of the 4.8 Ma Colorado River USA tracked with detrital sanidine and fish genetics
The development of the continental-scale Colorado River system, western USA, from 8 to 4.8 Ma, is revealed using 60-40 Ma detrital sanidine tracer grains and fish phylogeny. Here we show that precursor paleoriver segments became integrated north to south as traced by 60-40 Ma sand grains that were derived from the north and sequentially appeared in the 25-8 Ma Browns Park Formation of...
Authors
K. E. Karlstrom, M. Heizler, A. Aslan, Ian W. Hillenbrand, S. Cather, T. F. Turner, M. Osborne, C. D. Henry, L. J. Crossey
Determination of baseline water-quality conditions using continuous specific conductance and discrete measurements of total dissolved solids and selected major ions, Arkansas River Basin, Colorado Determination of baseline water-quality conditions using continuous specific conductance and discrete measurements of total dissolved solids and selected major ions, Arkansas River Basin, Colorado
From 2022 through 2024, the U.S. Geological Survey (USGS) in cooperation with the Regional Resources Planning Group (Southeastern Colorado Water Conservancy District, Colorado Springs Utilities, Pueblo Water, Lower Arkansas Valley Water Conservancy District, Aurora Water, and Upper Arkansas Water Conservancy District) established a basinwide water-quality monitoring network in the...
Authors
Lisa D. Miller, Lauren E. Eng, Jackson B. Sharp
The digital archivist: Automating legacy macroseismic data processing using large language models The digital archivist: Automating legacy macroseismic data processing using large language models
Macroseismic data are a key resource to investigate shaking and damage from preinstrumental and early instrumental eras. However, data are often stored as inconsistently formatted reports describing observed shaking and damage, making manually parsing and interpreting accounts labor‐intensive. We introduce a novel workflow using Google’s Gemini 2.5 Pro large language model (LLM) to...
Authors
Aarnav Agrawal, Susan E. Hough, Mostafa Mousavi, Margaret Hellweg, William Ellsworth, Clara Yoon, Salvador Blanco
Small creatures, big challenge: A review of current knowledge and assessment of research needs to inform water withdrawal management for the Duck River's freshwater mussel fauna Small creatures, big challenge: A review of current knowledge and assessment of research needs to inform water withdrawal management for the Duck River's freshwater mussel fauna
The Duck River is a remarkable national resource, boasting outstanding biodiversity (Ahlstedt et al. 2017). It contains 151 fish species, over 60 mussel species, and 22 snail species, many of which are federally listed (Etnier and Starnes 1993; Johnson et al. 2013; Ahlstedt et al. 2017; Womble and Rosenberger 2025a). The Duck River watershed is at a pivotal time in its management and...
Authors
Kristin Irwin Womble, Amanda E. Rosenberger
High‐resolution surface deformation and slip distribution observations for the 2023 Kahramanmaraş, Türkiye, earthquake sequence help constrain the rupture process High‐resolution surface deformation and slip distribution observations for the 2023 Kahramanmaraş, Türkiye, earthquake sequence help constrain the rupture process
Splay, or branch, faults are a common geometric feature of earthquake surface ruptures and may provide constraints on the rupture behavior of an earthquake. The 2023 Mw 7.8 Pazarcık and Mw 7.5 Elbistan, Türkiye, earthquakes are examples of ruptures with multiple small splays, and the Pazarcık earthquake nucleated on a splay fault, the Narlı fault, before rupturing bilaterally on the East...
Authors
Nadine G. Reitman, M. Morow Tan, Paula Madeline Burgi, Alexandra Elise Hatem, Christopher B. DuRoss, Richard W. Briggs
Avoiding common pitfalls in the implementation of adaptive forest wildlife management Avoiding common pitfalls in the implementation of adaptive forest wildlife management
Forest management planning requires the evaluation of tradeoffs in proposed management actions to meet multiple objectives, including providing the habitat required to sustain wildlife populations. However, various species-specific life history strategies and ecological uncertainties complicate our understanding of the responses of wildlife to disturbances, such as wildfires and forest...
Authors
Adam Duarte, James T. Peterson
Three new calcium formate reference materials for δ13C measurements and a redetermination of the R(13C/12C) ratio for VPDB based on proton nuclear magnetic resonance measurements Three new calcium formate reference materials for δ13C measurements and a redetermination of the R(13C/12C) ratio for VPDB based on proton nuclear magnetic resonance measurements
Rationale
Authors
David W. Hoffman, Cornelia Rasmussen, Arndt Schimmelmann, Lauren T Reid, Haiping Qi, Tyler B. Coplen
Reaffirming the consistency of the original stock of NBS 19 limestone and its byproduct with finer grain size for δ13C and δ18O calibrations—Both distributed internationally Reaffirming the consistency of the original stock of NBS 19 limestone and its byproduct with finer grain size for δ13C and δ18O calibrations—Both distributed internationally
Rationale
Authors
Haiping Qi, Tyler B. Coplen, Lauren T Reid, Stanley J. Mroczkowski