The California stream quality assessment

Metre, Peter C. Van; Egler, Amanda L.; May, Jason T.

doi:10.3133/fs20173014

Cited by 4 publications

(3 citation statements)

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“…A bed sediment sample and a biofilm sample were collected at each of 54 wadeable stream sites in the Central California Foothills and Coastal Mountains ecoregion () (Supporting Information (SI) Figure S1; Table S1). The sites are a subset of those chosen for the U.S. Geological Survey (USGS) California Stream Quality Assessment (CSQA) (), which was designed to assess relations between stressors and stream ecology across a region.…”

Section: Methodsmentioning

confidence: 99%

Biofilms Provide New Insight into Pesticide Occurrence in Streams and Links to Aquatic Ecological Communities

Mahler

Schmidt

Nowell

et al. 2020

Environ. Sci. Technol.

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Streambed sediment is commonly analyzed to assess occurrence of hydrophobic pesticides and risks to aquatic communities. However, stream biofilms also have the potential to accumulate pesticides and may be consumed by aquatic organisms. To better characterize risks to aquatic life, the U.S. Geological Survey Regional Stream Quality Assessment measured 93 current-use and 3 legacy pesticides in bed sediment and biofilm from 54 small streams in California across a range of land-use settings. On average, 4 times as many current-use pesticides were detected in biofilm at a site (median of 2) as in sediment (median of 0.5). Of 31 current-use pesticides detected, 20 were detected more frequently in biofilm than in sediment and 10 with equal frequency. Pyrethroids as a class were the most potentially toxic to benthic invertebrates, and of the 9 pyrethroids detected, 7 occurred more frequently in biofilm than sediment. We constructed general additive models to investigate relations between pesticides and 6 metrics of benthic community structure. Pesticides in biofilm improved fit in 4 of the 6 models, and pesticides in sediment improved fit in 2. The results indicate that the sampling of stream biofilms can complement bed-sediment sampling by identification of more current-use pesticides present and better estimation of ecological risks.

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Section: Methodsmentioning

confidence: 99%

Biofilms Provide New Insight into Pesticide Occurrence in Streams and Links to Aquatic Ecological Communities

Mahler

Schmidt

Nowell

et al. 2020

Environ. Sci. Technol.

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“…These sites could potentially be developed to include facilities for evaluations across multiple generations (particularly when using invertebrate species). Survey sites can be randomly distributed in space or a stratum of land use/source combination (Garrett et al 2017;Van Metre et al 2017) ongoing Delta RPM research). The selection of long-term and survey sites should thus be based on statistical comparisons of watershed characteristics, such as land use and demographics.…”

Section: The Way Forwardmentioning

confidence: 99%

Review of and Recommendations for Monitoring Contaminants and their Effects in the San Francisco Bay−Delta

Connon

Hasenbein

Brander

et al. 2019

SFEWS

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Legacy and current-use contaminants enter into and accumulate throughout the San Francisco Bay−Delta (Bay−Delta), and are present at concentrations with known effects on species important to this diverse watershed. There remains major uncertainty and a lack of focused research able to address and provide understanding of effects across multiple biological scales, despite previous and ongoing emphasis on the need for it. These needs are challenging specifically because of the established regulatory programs that often monitor on a chemical-by-chemical basis, or in which decisions are grounded in lethality-based endpoints. To best address issues of contaminants in the Bay−Delta, monitoring efforts should consider effects of environmentally relevant mixtures and sub-lethal impacts that can affect ecosystem health. These efforts need to consider the complex environment in the Bay−Delta including variable abiotic (e.g., temperature, salinity) and biotic (e.g., pathogens) factors. This calls for controlled and focused research, and the development of a multi-disciplinary contaminant monitoring and assessment program that provides information across biological scales. Information gained in this manner will contribute toward evaluating parameters that could alleviate ecologically detrimental outcomes. This review is a result of a Special Symposium convened at the University of California−Davis (UCD) on January 31, 2017 to address critical information needed on how contaminants affect the Bay−Delta. The UCD Symposium focused on new tools and approaches for assessing multiple stressor effects to freshwater and estuarine systems. Our approach is similar to the recently proposed framework laid out by the U.S. Environmental Protection Agency (USEPA) that uses weight of evidence to scale toxicological responses to chemical contaminants in a laboratory, and to guide the conservation of priority species and habitats. As such, we also aimed to recommend multiple endpoints that could be used to promote a multi-disciplinary understanding of contaminant risks in Bay−Delta while supporting management needs.

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“…Designated as the Northeast Stream Quality Assessment (NESQA), this study was the fourth of the five NAWQA Cycle III regional studies ( fig. 1); others were the Midwest Stream Quality Assessment in 2013 (U.S. Geological Survey, 2012), the Southeast Stream Quality Assessment in 2014 (Van Metre and Journey, 2014), the Pacific Northwest Stream Quality Assessment in 2015 (Van Metre, and others, 2015), and the California Stream Quality Assessment in 2017 (Van Metre, Egler, and May, 2017). The study area for the NESQA included 95 watersheds in 8 States: Connecticut, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, and Vermont ( fig.…”

Section: Introductionmentioning

confidence: 99%

Design and methods of the U.S. Geological Survey Northeast Stream Quality Assessment (NESQA), 2016

Coles¹,

Riva-Murray²,

Metre³

et al. 2019

Open-File Report

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The California stream quality assessment

Cited by 4 publications

References 0 publications

Biofilms Provide New Insight into Pesticide Occurrence in Streams and Links to Aquatic Ecological Communities

Biofilms Provide New Insight into Pesticide Occurrence in Streams and Links to Aquatic Ecological Communities

Review of and Recommendations for Monitoring Contaminants and their Effects in the San Francisco Bay−Delta

Design and methods of the U.S. Geological Survey Northeast Stream Quality Assessment (NESQA), 2016

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