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Relating glassy rind thicknesses to ambient air temperatures at the Lost Jim flow field in the Imuruk Lake volcanic field, Alaska Relating glassy rind thicknesses to ambient air temperatures at the Lost Jim flow field in the Imuruk Lake volcanic field, Alaska
The Lost Jim flow field, in the Imuruk Lake volcanic field, Alaska, extends west ~34 km from a single vent, crossing subarctic tundra and currently touches several lakes and streams. The weighted mean of five 36Cl cosmogenic exposure ages from the Lost Jim pāhoehoe flow is 7.73 ± 0.37 ka, indicating this eruption occurred substantially after the eruption of the underlying Camille flow...
Authors
Erika Rader, Jessica Larsen, Tim R. Orr, Dawn Catherine Sweeney Ruth, Jessica Stanley
Surface detection probability of leatherback turtles at the Rio de La Plata and its Maritime Front: Implications for density estimates Surface detection probability of leatherback turtles at the Rio de La Plata and its Maritime Front: Implications for density estimates
The Río de la Plata and its Maritime Front (RLPMF) serve as a key, seasonal feeding area for leatherback sea turtles (Dermochelys coriacea) in the Southwestern Atlantic Ocean. While leatherback turtles can be frequently observed in these waters, there is little data on regional abundances and relative densities, which hinders threat assessments and the development of effective...
Authors
Natalia S Teryda, Laura Prosdocimi, Erik A. Pinheiro dos Santos, Gustavo Stahelin, Milagros Lopez-Mendilaharzu, Raymond Carthy
Monazite and xenotime U-Pb geochronology and thermometry of the Blue Ridge and Inner Piedmont of North Carolina: Implications for the thermal-metamorphic evolution of the southern Appalachian metamorphic “core” Monazite and xenotime U-Pb geochronology and thermometry of the Blue Ridge and Inner Piedmont of North Carolina: Implications for the thermal-metamorphic evolution of the southern Appalachian metamorphic “core”
The southern Appalachian orogen preserves a complex distribution of metamorphism and deformation varying in timing, magnitude, and spatial extent. These complexities give rise to disparate interpretations for southern Appalachian tectonic evolution, which complicates the testing and interpretation of tectonic models in this system. New monazite (Mnz) and xenotime (Xtm) laser ablation...
Authors
Nicholas Edwin Powell, J. Ryan Thigpen, Brandon M. Spencer, Arthur J. Merschat, David P. Moecher, Calvin A. Mako, Robert D. Hatcher, Harold H. Stowell, Andrew R.C. Kylander-Clark
Simulating past and future refugia for temperate trees in northern Italy Simulating past and future refugia for temperate trees in northern Italy
During the Quaternary, trees responded to the climatic changes of glacial–interglacial cycles with large-scale range shifts. Over cold glacials, temperate tree species contracted their ranges and survived in areas known as refugia. Several studies point to the Euganean Hills (Colli Euganei), in Veneto, northern Italy, as one of the northernmost European refugia of temperate tree species...
Authors
Azzurra Pistone, Paul Henne, Petra Boltshauser-Kaltenrieder, Willy Tinner, Christoph Schworer
Tracking Pacific salmon migrations with a prototype eDNA autosampler Tracking Pacific salmon migrations with a prototype eDNA autosampler
Pacific salmon (Oncorhynchus spp.) are keystone species that support commercial and recreational fisheries and play a significant role in Indigenous cultures. As a keystone species, they are commonly monitored to assess population metrics and adult and juvenile migration. Environmental DNA (eDNA) has been successfully applied to salmon monitoring, but these efforts have relied on...
Authors
Marshal S. Hoy, Austen C. Thomas, Dorothy M. Chase, Ryan P. Kelly, Sarah Hensley, Carl O. Ostberg
Distribution, abundance, breeding activities, and restoration efforts for the Southwestern Willow Flycatcher at Marine Corps Base Camp Pendleton, California—2025 Annual Report Distribution, abundance, breeding activities, and restoration efforts for the Southwestern Willow Flycatcher at Marine Corps Base Camp Pendleton, California—2025 Annual Report
Authors
Suellen Lynn, Scarlett L. Howell, Barbara E. Kus
Continuous stream discharge, salinity, and associated data collected in the lower St. Johns River and its tributaries, Florida, 2023 Continuous stream discharge, salinity, and associated data collected in the lower St. Johns River and its tributaries, Florida, 2023
The U.S. Army Corps of Engineers, Jacksonville District, deepened the St. Johns River channel in Jacksonville, Florida, to accommodate larger, fully loaded cargo vessels. The U.S. Geological Survey (USGS), in cooperation with the U.S. Army Corps of Engineers, monitored stage, discharge, and (or) water temperature and salinity at 26 continuous data collection sites in the St. Johns River...
Authors
Jennifer N. Carson, Matthew T. Benacquisto
Analyses of eye lens stable isotopes across ontogeny of trophically diverse freshwater salmonids Analyses of eye lens stable isotopes across ontogeny of trophically diverse freshwater salmonids
Ontogenetic niche shifts in fishes are nearly universal but remain poorly understood in many species despite being fundamentally important for the persistence, management, and conservation of fish populations, including those of vulnerable salmonids. Eye lens stable isotope analysis has proven useful in studying ontogeny in some marine species but has rarely been applied in freshwater...
Authors
Glenn T. Schumacher, Ernst B. Peebles, Nathan B. Furey, Michael T. Kinnison, Gregory R. Kronisch, Christina Amy Murphy
Multi-proxy thermal history of basin heating during Cordilleran orogenesis in the Magallanes-Austral retroarc foreland basin, Patagonian Andes Multi-proxy thermal history of basin heating during Cordilleran orogenesis in the Magallanes-Austral retroarc foreland basin, Patagonian Andes
Resolving thermal histories in sedimentary basins is crucial for interpreting orogenic growth, basin burial, and tectonic processes during Cordilleran orogenesis. In the Magallanes–Austral Basin, Patagonian Andes, we integrate new (U-Th)/He thermochronology, vitrinite reflectance (%Ro), calcite-cement clumped isotope data and thermal history modelling to resolve the origin of the...
Authors
Rebecca A. VanderLeest, Julie C. Fosdick, Theresa Maude Schwartz, E.G. Hyland, M. Mastalerz
Spawning habitat suitability models for Lake Erie cisco (Coregonus artedi) during the historical period of pre- and post-population declines 1877–1957 Spawning habitat suitability models for Lake Erie cisco (Coregonus artedi) during the historical period of pre- and post-population declines 1877–1957
Coregonine fishes play a key role in the food webs and fisheries of the Laurentian Great Lakes and are a major focus of basin-wide conservation efforts. In Lake Erie, management goals prioritize rebuilding spawning populations of cisco (Coregonus artedi). However, the historical distribution of cisco spawning habitat and the environmental conditions that influence early life-stage...
Authors
Katelyn King, Cory O. Brant, Arthur Cooper, Gust Annis, Matthew Herbert, Karen M. Alofs
Enduring cultural legacies affect Euro-American wildlife values Enduring cultural legacies affect Euro-American wildlife values
Social values shape biodiversity conservation success. Yet information is lacking on how values form, change and adapt people to their environment. Our 33-nation survey in 2021–2023 (n = 18,477) explored the effect of the institutions of European colonization on present-day values towards wildlife in the Americas. Here we found mutualism values (seeing wildlife as part of one’s social...
Authors
Michael J. Manfredo, Tara L. Teel, Benjamin Ghasemi, Thao Tran, Ugo Arbieu, Richard Eugene Waggaman Berl, Duan Biggs, Luigi Boitani, Paolo Ciucci, Miguel Delibes-Mateos, Enrico Di Minin, Sabrina Dressel, Christian Gamborg, Jenny Anne Glikman, Catherine Hill, Maarten Jacobs, Frank Søndergaard Jensen, Irena Kavčič, Rose Keller, Silvio Marchini, Sofia Nanni, Agnieszka Olszańska, Jonathan Salerno, Camilla Sandström, Kenneth Shockley, Dean Smith, Eick von Ruschkowski
Unraveling protracted modification of Archean and Paleoproterozoic crust in central Laurentia, Penokean orogen, with garnet and accessory mineral geochronology and microstructural analysis Unraveling protracted modification of Archean and Paleoproterozoic crust in central Laurentia, Penokean orogen, with garnet and accessory mineral geochronology and microstructural analysis
Proterozoic metamorphism and deformation of the southern margin of the Superior craton in the Lake Superior region is attributed to the Penokean orogeny (1890−1830 Ma). This model includes a period of crustal inversion in which Archean basement blocks were exhumed through overlying Paleoproterozoic strata, producing the corridor of gneiss domes that parallels the trend of the Penokean...
Authors
Ross Anthony Salerno, William F. Cannon, Jay M. Thompson, Amanda Kate Souders, Jeffrey D Vervoort, Ian W. Hillenbrand