Revised Protocols for Sampling Algal, Invertebrate, and Fish Communities as Part of the National Water-Quality Assessment Program

Moulton, Stephen R.; Kennen, Jonathan G.; Goldstein, Robert M.; Hambrook, Julie A.

doi:10.3133/ofr2002150

Cited by 184 publications

(179 citation statements)

References 18 publications

(7 reference statements)

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“…This process was repeated two more times. The homogenized mixture was filtered in 5-to 10-mL increments until a thin pigmented film was present on the filter (Moulton et al 2002). Similar to the sestonic chlorophyll samples, all RTH and DTH periphyton filters were prepared under subdued light, stored in the dark, frozen in the field, and shipped on dry ice to the NWQL for analyses of Chl a and ash-free dry weight (AFDW) (Moulton et al 2002).…”

Section: Data Collectionmentioning

confidence: 99%

“…intervals across the stream. A 50-mL aliquot of the surface water sample was filtered through a 47-mm glass fiber filter (Moulton et al 2002). The filtration step was repeated until a thin pigmented film was present on the filter.…”

Section: Data Collectionmentioning

confidence: 99%

“…The RTH samples were collected from rocks in the CCYK and WHMI study areas and from woody snags in the CNBR and DLMV study areas. Within each stream, five individual RTH samples were collected from the targeted habitat (rock or wood), using a surface or cylinder scrape methodology (Moulton et al 2002), and composited. The homogenized mixture was filtered in 5-mL increments until a thin pigmented film was present on the filter (Moulton et al 2002).…”

Section: Data Collectionmentioning

confidence: 99%

“…Within each stream, five individual RTH samples were collected from the targeted habitat (rock or wood), using a surface or cylinder scrape methodology (Moulton et al 2002), and composited. The homogenized mixture was filtered in 5-mL increments until a thin pigmented film was present on the filter (Moulton et al 2002). The DTH samples were processed using a modification of methods by Stevenson and Stoermer (1981).…”

Section: Data Collectionmentioning

confidence: 99%

“…The sestonic algae filters were prepared under subdued lighting conditions, folded, and wrapped in aluminum foil to minimize chlorophyll degradation due to light exposure. The filters were frozen in the field and shipped on dry ice to the NWQL for analyses of chlorophyll a (Chl a) and pheophytin (Moulton et al 2002) using EPA method 445.0 (Arar and Collins 1997a, b).…”

Section: Data Collectionmentioning

confidence: 99%

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The relative influence of nutrients and habitat on stream metabolism in agricultural streams

Frankforter

Weyers

Bales

et al. 2009

Environ Monit Assess

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Stream metabolism was measured in 33 streams across a gradient of nutrient concentrations in four agricultural areas of the USA to determine the relative influence of nutrient concentrations and habitat on primary production (GPP) and respiration reach. When data for all study areas were combined, there were no statistically significant relations between gross primary production or community respiration and any of the independent variables. However, significant regression models were developed for three study areas for GPP (r 2 = 0.79-0.91) and CR-24 (r 2 = 0.76-0.77). Various forms of nutrients (total phosphorus and area-weighted total nitrogen loading) were significant for predicting GPP in two study areas, with habitat variables important in seven significant models. Important physical variables included light availability, precipitation, basin area, and in-stream habitat cover. Both benthic and seston chlorophyll were not found to be important explanatory variables in any of the models; however, benthic ash-free dry weight was important in two models for GPP.

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Section: Data Collectionmentioning

confidence: 99%

Section: Data Collectionmentioning

confidence: 99%

Section: Data Collectionmentioning

confidence: 99%

Section: Data Collectionmentioning

confidence: 99%

Section: Data Collectionmentioning

confidence: 99%

See 3 more Smart Citations

The relative influence of nutrients and habitat on stream metabolism in agricultural streams

Frankforter

Weyers

Bales

et al. 2009

Environ Monit Assess

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Pharmaceuticals and Hormones in the Environment

Jones-Lepp

Alvarez²,

Englert

et al. 2009

Encyclopedia of Analytical Chemistry

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Some of the earliest initial reports from Europe and the United States demonstrated that a variety of pharmaceuticals and hormones could be found in surface waters, source waters, drinking water, and influents and effluents from wastewater treatment plants (WWTPs). It is unknown though, at this time, what ecotoxicological effects can be had from pharmaceuticals and hormones that are essentially designed for one purpose (e.g., treatment of human and domestic livestock for illness and disease) and their possible adverse effects on terrestrial wildlife, aquatic organisms, bacteria, and ultimately humans, through unintentional environmental exposure. One of the challenges the analytical chemistry community faces is the development of robust and standardized analytical methods and technologies that can easily be transferred to laboratories worldwide. While today's analysts can detect picograms per liter and nanograms per liter concentrations of numerous pharmaceuticals, hormones, and their metabolites, in a variety of environmental matrices, there are still analytical gaps that are necessary to fill. We hope that this article will add to the body of knowledge of environmental analytical chemistry techniques regarding pharmaceuticals and hormones, giving environmental scientists a good overview of those analytical techniques that are currently available, and where possible, of improvements and new methodologies that can be developed in support of this important, and relevant, environmental issue.

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Size‐dependent effects of dams on river ecosystems and implications for dam removal outcomes

Brown,

Charles,

Horwitz

et al. 2024

Ecological Applications

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Understanding the relationship between a dam's size and its ecological effects is important for prioritization of river restoration efforts based on dam removal. Although much is known about the effects of large storage dams, this information may not be applicable to small dams, which represent the vast majority of dams being considered for removal. To better understand how dam effects vary with size, we conducted a multidisciplinary study of the downstream effect of dams on a range of ecological characteristics including geomorphology, water chemistry, periphyton, riparian vegetation, benthic macroinvertebrates, and fish. We related dam size variables to the downstream–upstream fractional difference in measured ecological characteristics for 16 dams in the mid‐Atlantic region ranging from 0.9 to 57 m high, with hydraulic residence times (HRTs) ranging from 30 min to 1.5 years. For a range of physical attributes, larger dams had larger effects. For example, the water surface width below dams was greater below large dams. By contrast, there was no effect of dam size on sediment grain size, though the fraction of fine‐grained bed material was lower below dams independently of dam size. Larger dams tended to reduce water quality more, with decreased downstream dissolved oxygen and increased temperature. Larger dams decreased inorganic nutrients (N, P, Si), but increased particulate nutrients (N, P) in downstream reaches. Aquatic organisms tended to have greater dissimilarity in species composition below larger dams (for fish and periphyton), lower taxonomic diversity (for macroinvertebrates), and greater pollution tolerance (for periphyton and macroinvertebrates). Plants responded differently below large and small dams, with fewer invasive species below large dams, but more below small dams. Overall, these results demonstrate that larger dams have much greater impact on the ecosystem components we measured, and hence their removal has the greatest potential for restoring river ecosystems.

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Revised Protocols for Sampling Algal, Invertebrate, and Fish Communities as Part of the National Water-Quality Assessment Program

Cited by 184 publications

References 18 publications

The relative influence of nutrients and habitat on stream metabolism in agricultural streams

The relative influence of nutrients and habitat on stream metabolism in agricultural streams

Pharmaceuticals and Hormones in the Environment

Size‐dependent effects of dams on river ecosystems and implications for dam removal outcomes

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