Biological assessment of streams and rivers in U.S. - design, methods, and analysis

Rashleigh, Brenda; Paulson, Steve; Flotemersch, Joe; Pelletier, Peg

doi:10.5141/ecoenv.2013.010

Cited by 4 publications

(3 citation statements)

References 14 publications

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“…Currently, states, tribes and federal agencies vary in the biological and physical habitat data sampled and may include fishes, macroinvertebrates, plants and algae (Rashleigh et al . ). This project demonstrates the establishment of a hybrid TALU with two commonly sampled fauna and frequently measured physical habitat parameters and provides an example for using existing data in the development of a hybrid TALU.…”

Section: Introductionmentioning

confidence: 97%

A tiered aquatic life unit bioassessment model for Gulf of Mexico coastal streams

Daniel

Brown

Kaller

2014

Fisheries Management Eco

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The tiered aquatic life unit (TALU) model allows quick and efficient bioassessment with goals that are based on practical, systematic sampling of commonly measured stream variables. A six-tier hybrid TALU model was developed as a proof of concept study for streams in six level IV ecoregions in the north-central Gulf of Mexico coastal plain. The model used in-stream habitat variables, land use, surveys of the unionid mussels, number of intolerant fish species and fish diversity in streams varying from 2nd through 6th order. The model classification identified sites considered a priori either as impaired or best available and minimised Type I (mistakenly concluding impairment) and Type II (failing to detect impairment) errors. The model also detected transitional sites, thereby illustrating incremental degradation or recovery, in contrast to previous monitoring tools focused on pass/fail approaches. Because the model classifies transitional sites and is easily modified to fit other ecoregions, it offers a useful foundation for resource managers to monitor the health of coastal plain rivers.

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Section: Introductionmentioning

confidence: 97%

A tiered aquatic life unit bioassessment model for Gulf of Mexico coastal streams

Daniel

Brown

Kaller

2014

Fisheries Management Eco

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“…Excessive amounts of nitrogen (N) from agriculture, wastewater facilities, and chemical industries are discharged into rivers and streams resulting in N pollution in approximately 42% of US rivers and streams (Rashleigh et al, 2013;Xia et al, 2018). Excessive nitrogen in riverine ecosystems can cause many environmental problems, including eutrophication, enhanced nitrous oxide production, and hypoxia (Galloway et al, 2004;Fowler et al, 2013) with economic consequences related to purifying contaminated drinking water, treating health issues, and restoring impaired ecosystems (Xia et al, 2018;Katz, 2020).…”

Section: Introductionmentioning

confidence: 99%

Sediment-Nitrogen (N) connectivity: suspended sediments in streams as N exporters and reactors for denitrification and assimilatory N uptake during storms

Joshi,

Bacmeister,

Peck

et al. 2023

Front. Water

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Nitrogen (N) pollution in riverine ecosystems has substantial environmental, economic, and policy consequences. Various riverine N removal processes include permanent dissimilatory sinks such as denitrification (Uden) and temporary assimilatory sink such as microbial N uptake (Uassim). Both processes have been extensively evaluated in benthic sediments but only sparsely in the water column, particularly for storm flows producing high suspended sediment (SS) concentrations. Stormflows also increase the sediment bound N (Sed-N) export, and in turn, the overall N exports from watersheds. The balance between N removal by Uden and Uassim vs. Sed-N export has not been studied and is a key knowledge gap. We assessed the magnitude of Uden and Uassim against stormflow Sed-N exports for multiple storm events of varying magnitude and across two drainage areas (750 ha and 15,330 ha) in a mixed landuse mid-Atlantic US watershed. We asked: How do the Uden and Uassim sinks compare with Sed-N exports and how do these N fluxes vary across the drainage areas for sampled storms on the rising and falling limbs of the discharge hydrograph? Mean Uden and Uassim as % of the Sed-N exports ranged between 0.1–40% and 0.6–22%, respectively. Storm event Uassim fluxes were generally slightly lower than the corresponding Uden fluxes. Similarly, comparable but slightly higher Uden fluxes were observed for the second order vs. the fourth order stream, while Uassim fluxes were slightly higher in the fourth-order stream. Both of these N sinks were higher on the falling vs. rising limbs of the hydrograph. This suggests that while the N sinks are not trivial, sediment bound N exports during large stormflows will likely overshadow any gains in N removal by SS associated denitrification. Understanding these N source-sink dynamics for storm events is critical for accurate watershed nutrient modeling and for better pollution mitigation strategies for downstream aquatic ecosystems. These results are especially important within the context of climate change as extreme hydrological events including storms are becoming more and more frequent.

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“…) [14]. According to the Global NEWS model TN and dissolved inorganic nitrogen (DIN) are predicted to continue to increase [15].…”

Section: Introductionmentioning

confidence: 99%

A Holistic Approach to Stormwater Green Infrastructure

Mirza

Nie

Viteritto

et al. 2020

J. Environ. Sci. Eng. Technol.

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One of the factors that threaten fresh water quality is the input of anthropogenic nutrients, a problem heightened in urban areas with lots of impervious surfaces. The implementation of stormwater green infrastructure allows stormwater runoff to be filtered before entering waterways, reducing nutrient input. Stormwater green infrastructure includes installations such as green roofs, green alleyways, and parks which can provide environmental, mental and physical health benefits to local residents who may have lacked access to green space. However, such installations can also have the counter intuitive effect of gentrification, termed the ‘green space paradox’. Through the review of published literature and case studies, a holistic design of stormwater green infrastructure implementation is presented in this study, which includes public participation, sustainability, and equity of distribution.

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Biological assessment of streams and rivers in U.S. - design, methods, and analysis

Cited by 4 publications

References 14 publications

A tiered aquatic life unit bioassessment model for Gulf of Mexico coastal streams

A tiered aquatic life unit bioassessment model for Gulf of Mexico coastal streams

Sediment-Nitrogen (N) connectivity: suspended sediments in streams as N exporters and reactors for denitrification and assimilatory N uptake during storms

A Holistic Approach to Stormwater Green Infrastructure

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