S. M. Stackpoole
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View article: Imidacloprid in United States Rivers, 2013–2022: Persistent Presence and Emerging Chronic Hazard
Imidacloprid in United States Rivers, 2013–2022: Persistent Presence and Emerging Chronic Hazard Open
Imidacloprid, a neonicotinoid insecticide, is used for agricultural and nonagricultural purposes and is toxic to nontarget organisms at low concentrations in aquatic ecosystems. A total of 12,547 water samples were collected from 2013 to 2…
View article: Evaluation of metrics and thresholds for use in national-scale river harmful algal bloom assessments
Evaluation of metrics and thresholds for use in national-scale river harmful algal bloom assessments Open
The spatiotemporal distribution of harmful algal blooms (HABs) in rivers remains poorly understood, and there is an urgent need to develop a consistent set of metrics to better document HAB occurrences and forecast future events. Using dat…
View article: River Control Points for Algal Productivity Revealed by Transport Analysis
River Control Points for Algal Productivity Revealed by Transport Analysis Open
Measurement of planktonic chlorophyll‐ a —a proxy for algal biomass—in rivers may represent local production or algae transported from upstream, confounding understanding of algal bloom development in flowing waters. We modeled 3 years of …
View article: Interdisciplinary science approach for harmful algal blooms (HABs) and algal toxins—A strategic science vision for the U.S. Geological Survey
Interdisciplinary science approach for harmful algal blooms (HABs) and algal toxins—A strategic science vision for the U.S. Geological Survey Open
First posted May 23, 2024 For additional information, contact: Director, Water Resources Mission AreaU.S. Geological Survey12201 Sunrise Valley DriveReston, VA 20192Contact Pubs Warehouse Algal blooms in water, soils, dusts, and the enviro…
View article: Integrated water resources trend assessments: State of the science, challenges, and opportunities for advancement
Integrated water resources trend assessments: State of the science, challenges, and opportunities for advancement Open
Water is vital to human life and healthy ecosystems. Here we outline the current state of national‐scale water resources trend assessments, identify key gaps, and suggest advancements to better address critical issues related to changes in…
View article: Long‐Term Mississippi River Trends Expose Shifts in the River Load Response to Watershed Nutrient Balances Between 1975 and 2017
Long‐Term Mississippi River Trends Expose Shifts in the River Load Response to Watershed Nutrient Balances Between 1975 and 2017 Open
Excess nutrients transported by the Mississippi River (MR) contribute to hypoxia in the Gulf of Mexico. Nutrient balances are key drivers to river nutrient loads and represent inputs (fertilizer, manure, deposition, wastewater, N‐fixation,…
View article: Pesticides in US Rivers: Regional differences in use, occurrence, and environmental toxicity, 2013 to 2017
Pesticides in US Rivers: Regional differences in use, occurrence, and environmental toxicity, 2013 to 2017 Open
Pesticides pose a threat to the environment, but because of the substantial number of compounds, a comprehensive assessment of pesticides and an evaluation of the risk that they pose to human and aquatic life is challenging. In this study,…
View article: Pesticide mixtures show potential toxicity to aquatic life in U.S. streams, water years 2013–2017
Pesticide mixtures show potential toxicity to aquatic life in U.S. streams, water years 2013–2017 Open
During water years (WY) 2013-2017, the U.S. Geological Survey, National Water-Quality Assessment (NAWQA) Project, sampled the National Water Quality Network - Rivers and Streams (NWQN) year-round and reported on 221 pesticides at 72 sites …
View article: Variable impacts of contemporary versus legacy agricultural phosphorus on US river water quality
Variable impacts of contemporary versus legacy agricultural phosphorus on US river water quality Open
Phosphorus (P) fertilizer has contributed to the eutrophication of freshwater ecosystems. Watershed-based conservation programs aiming to reduce external P loading to surface waters have not resulted in significant water-quality improvemen…
View article: Inland waters and their role in the carbon cycle of Alaska
Inland waters and their role in the carbon cycle of Alaska Open
The magnitude of Alaska ( AK ) inland waters carbon (C) fluxes is likely to change in the future due to amplified climate warming impacts on the hydrology and biogeochemical processes in high latitude regions. Although current estimates of…
View article: Aquatic carbon cycling in the conterminous United States and implications for terrestrial carbon accounting
Aquatic carbon cycling in the conterminous United States and implications for terrestrial carbon accounting Open
Significance Inland waters provide habitat for aquatic organisms; are sources of human drinking water; and integrate, transport, and process carbon across continents. Estimates of the accumulation of carbon in terrestrial environments sugg…