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Browse more than 65,000 articles authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.

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Sea level rise may pose conservation challenges for the endangered Cape Sable seaside sparrow Sea level rise may pose conservation challenges for the endangered Cape Sable seaside sparrow

Biodiversity conservation under a changing climate is a challenging endeavor. Landscapes are shifting as a result of climate change and sea level rise but plant communities in particular may not keep up with the pace of change. Predictive ecological models can help decision makers understand how species are likely to respond to change and then adjust management actions to align with...
Authors
Stephanie Romanach, Saira M. Haider, Allison Benscoter

Taxonomic identity, biodiversity, and antecedent disturbances shape the dimensional stability of stream invertebrates Taxonomic identity, biodiversity, and antecedent disturbances shape the dimensional stability of stream invertebrates

The “dimensional stability” approach measures different components of ecological stability to investigate how they are related. Yet, most empirical work has used small-scale and short-term experimental manipulations. Here, we apply this framework to a long-term observational dataset of stream macroinvertebrates sampled between the winter flooding and summer monsoon seasons. We test...
Authors
Daniel C Allen, Brian A Gill, Anya Metcalfe, Sophia M Bonjour, Scott Starr, Junna Wang, Diana Valentin, Nancy B. Grimm

Approaching the upper boundary of driver-response relationships: Identifying factors using a novel framework integrating quantile regression with interpretable machine learning Approaching the upper boundary of driver-response relationships: Identifying factors using a novel framework integrating quantile regression with interpretable machine learning

The identification of factors that may be forcing ecological observations to approach the upper boundary provides insight into potential mechanisms affecting driver-response relationships, and can help inform ecosystem management, but has rarely been explored. In this study, we propose a novel framework integrating quantile regression with interpretable machine learning. In the first...
Authors
Zhongyao Liang, Yaoyang Xu, Gang Zhao, Wentao Lu, Zhenghui Fu, Shuhang Wang, Tyler Wagner

On the scale-dependence of fault surface roughness On the scale-dependence of fault surface roughness

Defining roughness as the ratio of height to length, the standard approach to characterize amplitudes of single fault, joint and fracture surfaces is to measure average height as a function of profile length. Empirically, this roughness depends strongly on scale. The ratio is approximately 0.01 at a few mm but 10× smaller at a few tens of meters. Surfaces are rougher at small scales...
Authors
Nicholas M. Beeler

Searching for the Achilles heel(s) for maintaining invertebrate biodiversity across complexes of depressional wetlands Searching for the Achilles heel(s) for maintaining invertebrate biodiversity across complexes of depressional wetlands

Wetlands are among the most threatened ecosystems worldwide due to climate change and land-use conversion. Regional biodiversity of temporary wetlands is dependent on the existence of habitat complexes with variable hydroperiods. Because temperature and rainfall regimes are predicted to shift globally, together with land-use patterns, different scenarios of wetland loss are expected in...
Authors
Mateus M. Pires, Patricia E. Garcia, Leonardo Maltchik, Cristina Stenert, Luis B. Epele, Kyle McLean, Jamie M. Kneitel, Sophie Racey, Darold P. Batzer

An aridity threshold model of fire sizes and annual area burned in extensively forested ecoregions of the western USA An aridity threshold model of fire sizes and annual area burned in extensively forested ecoregions of the western USA

Wildfire occurrence varies among regions and through time due to the long-term impacts of climate on fuel structure and short-term impacts on fuel flammability. Identifying the climatic conditions that trigger extensive fire years at regional scales can enable development of area burned models that are both spatially and temporally robust, which is crucial for understanding the impacts...
Authors
Paul D. Henne, Todd Hawbaker

Understanding uncertainties in contemporary and future extreme wave events for broad-scale impact and adaptation planning Understanding uncertainties in contemporary and future extreme wave events for broad-scale impact and adaptation planning

Understanding uncertainties in extreme wind-wave events is essential for offshore/coastal risk and adaptation estimates. Despite this, uncertainties in contemporary extreme wave events have not been assessed, and projections are still limited. Here, we quantify, at global scale, the uncertainties in contemporary extreme wave estimates across an ensemble of widely used global wave...
Authors
Joao Morim, Thomas Wahl, Sean Vitousek, Sara Santamaria, Ian Young, Mark Hemer

“Aftershock Faults” and what they could mean for seismic hazard assessment “Aftershock Faults” and what they could mean for seismic hazard assessment

We study stress‐loading mechanisms for the California faults used in rupture forecasts. Stress accumulation drives earthquakes, and that accumulation mechanism governs recurrence. Most moment release in California occurs because of relative motion between the Pacific plate and the Sierra Nevada block; we calculate relative motion directions at fault centers and compare with fault...
Authors
Thomas E. Parsons, Eric L. Geist, Sophie E. Parsons

Density effects on native and non-native trout survival in streams Density effects on native and non-native trout survival in streams

Environmental stressors associated with a changing climate and non-native fish, individually, represent significant threats to native fish conservation. These threats can exacerbate risks to native fishes when conditions interact at the trailing edge of a population's distribution. We collected capture–mark–recapture data for Rio Grande cutthroat trout (RGCT, Oncorhynchus clarkii...
Authors
Brock M. Huntsman, Lauren Flynn, Colleen A. Caldwell, Abigail J. Lynch, Fitsum Abadi

The detection and attribution of extreme reductions in vegetation growth across the global land surface The detection and attribution of extreme reductions in vegetation growth across the global land surface

Negative extreme anomalies in vegetation growth (NEGs) usually indicate severely impaired ecosystem services. These NEGs can result from diverse natural and anthropogenic causes, especially climate extremes (CEs). However, the relationship between NEGs and many types of CEs remains largely unknown at regional and global scales. Here, with satellite-derived vegetation index data and...
Authors
Huiping Yang, Seth M. Munson, Chris Huntingford, Nuno Carvalhais, Alan K. Knapp, Xiangyi Li, Josep Penuelas, Jakob Zscheichler, Anping Chen

Solid Earth–atmosphere interaction forces during the 15 January 2022 Tonga eruption Solid Earth–atmosphere interaction forces during the 15 January 2022 Tonga eruption

Rapid venting of volcanic material during the 15 January 2022 Tonga eruption generated impulsive downward reaction forces on the Earth of ~2.0 × 1013 N that radiated seismic waves observed throughout the planet, with ~25 s source bursts persisting for ~4.5 hours. The force time history is determined by analysis of teleseismic P waves and Rayleigh waves with periods approximately
Authors
Ricardo Garza-Giron, Thorne Lay, Frederick Pollitz, Hiroo Kanamori, Luis Rivera

National Land Cover Database 2019: A new strategy for creating clean leaf-on and leaf-off Landsat composite images National Land Cover Database 2019: A new strategy for creating clean leaf-on and leaf-off Landsat composite images

National Land Cover Database (NLCD) 2019 is a new epoch of national land cover products for the conterminous United States. Image quality is fundamental to the quality of any land cover product. Image preprocessing has often taken a considerable proportion of overall time and effort for this kind of national project. An approach to prepare image inputs for NLCD 2019 production was...
Authors
Suming Jin, Jon Dewitz, Patrick Danielson, Brian Granneman, Catherine Costello, Zhe Zhu
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