Jackson River Modeling: 50‐Year Perspective

Thuman, Andrew J.; Gallagher, Thomas W.; Morse, Timothy M.

doi:10.1061/(asce)0733-9372(2006)132:9(1051)

Cited by 4 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nutrient enrichment has been linked with increased periphyton biomass lotic systems (e.g., Welch et al 1988; Kjeldsen 1994; Chetelat et al 1999; Francouer 2001, but see Biggs and Close 1989; Lohman et al 1991 for contrast), and exposure to PPME has been shown to increase biomass through increased nutrients (Hall et al 1991; Bothwell 1992; Culp and Podemski 1996; Dubé and Culp 1996; Podemski and Culp 1996; Culp et al 2000, 2003; Scrimgeour and Chambers 2000) although reduced light penetration to the substrate from increased color or solids can override the nutrient effects of PPME (Thuman et al 2006). However, the majority of these findings are derived from studies conducted in oligotrophic systems where increased nutrients would be expected to elicit a periphyton response, and in mesocosm or artificial stream studies where variability and effects from other environmental factors are reduced.…”

Section: Discussionmentioning

confidence: 99%

“…Development of chl a criteria is based upon assumptions of nutrient–algal relationships in streams, with excess periphyton production being the chief indicator and an adverse outcome of nutrient over‐enrichment. Excess nutrients in streams can result in rapid accrual of algae (Dodds et al 1998; Biggs 2000; Stevenson et al 2006) leading to shifts in community structure (Pringle 1990; Pan et al 1996), and reduction in water and habitat quality (Kutka and Richards 1996; Dodds and Welch 2000; Thuman et al 2006). However, the correlation between periphyton chl a and nutrient concentrations is not always positive or significant (Borchardt 1996).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spatial and temporal patterns of periphyton chlorophyll a related to pulp and paper mill discharges in four us receiving streams

Flinders

Minshall

Hall

et al. 2009

Integr Envir Assess & Manag

View full text Add to dashboard Cite

Nutrients in pulp and paper mill effluent (PPME) have been implicated in increased periphyton chlorophyll a (chl a) downstream of discharges. These findings are largely based on short-term studies conducted in artificial stream channels or mesocosms and often in oligotrophic systems, and it is unclear if long-term chl a patterns in higher-nutrient systems would show similar response. We conducted a long-term study of 4 receiving waters (Codorus Creek, Pennsylvania; the Leaf River, Mississippi; and the McKenzie and Willamette rivers, Oregon) in which periphyton samples and associated data on water quality (nitrogen and phosphorus concentrations, pH, color, and conductivity) and 2 physical habitat variables (depth and current velocity) were collected over an 8-y period from multiple sites upstream and downstream of PPME discharges. Study streams represented different ecoregions, warm- and coldwater systems, gradients of in-stream effluent concentration (<1-33%), and mill process types. General Linear Models examining the main and interaction effects of site, season, and year on periphyton chl a for each of the 4 streams showed periphyton chl a downstream of the PPME discharge in Codorus Creek and the McKenzie River was greater at some, but not all upstream sites, suggesting these differences may be due to factors other than PPME. Mean periphyton chl a ranged from <1 to 285 mg/m2 across streams, with relatively consistent site patterns across seasons and years. Overall, chl a in the spring and summer was greater than in the fall in Codorus Creek and on sand substrates in the Leaf River, with overall differences across years seen on rare occasions in the Leaf and Willamette rivers. Regression models examining environmental-chl a relationships explained 45.4% and 30.2% of variation in periphyton chl a in the McKenzie River and Codorus Creek, respectively, and <10% in the Leaf and Willamette rivers. Physical variables (stream depth and current velocity) were the most important model variables in the McKenzie River, while total nitrogen and color were of greatest importance in Codorus Creek. The findings of this study demonstrate the inherent variability of chl a standing crops, highlight the complexity of lotic periphyton communities, and reiterate the importance of long-term, multi-season studies in elucidating spatial and temporal patterns.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spatial and temporal patterns of periphyton chlorophyll a related to pulp and paper mill discharges in four us receiving streams

Flinders

Minshall

Hall

et al. 2009

Integr Envir Assess & Manag

View full text Add to dashboard Cite

show abstract

“…Industrial effluent discharges phosphorous-and nitrogen-rich effluent into the river approximately 50 km downstream of Gathright Dam. Periphyton chlorophyll a (chl a) standing crops downstream of these sources range from 300-1200 mg m À2 and are substantially higher than standing crops seen upstream (10-100 mg chla m 2 ) (Thuman et al, 2006). Standing crops exceeding 150 mg m À2 have been suggested as a threshold for nuisance conditions (Welch et al, 1988).…”

Section: Introductionmentioning

confidence: 99%

Effects of pulsed flows on nuisance periphyton growths in rivers: a mesocosm study

Flinders¹,

Hart²

2009

River Research & Apps

View full text Add to dashboard Cite

Rivers regulated by dams are typically characterized by altered biotic communities and habitat structure in downstream reaches. In the Jackson River (Alleghany Co., VA), a relatively constant flow regime below Gathright Dam and anthropogenic nutrient loading have apparently contributed to nuisance levels of periphyton (>300 mg chlorophyll a m À2). These nuisance growths cause low dissolved oxygen concentrations in the water column and altered benthic habitats in the Jackson River. The use of periodic pulsed flows has been suggested as a restoration practice that could potentially reduce periphyton biomass. We investigated the effects of increased flow on periphyton chlorophyll a (chl a), ash-free dry mass (AFDM), % organic matter (%OM) using streamside channels in which periphyton-colonized tiles were subjected to near-bed velocities ranging from 20 (control) to 240 cm s À1. Analysis of variance (ANOVA) and regression were used to examine periphyton responses to velocity treatments. There was a significant decrease in chl a and AFDM, and significant increase in %OM in velocity treatments of 150, 180 and 240 cm s À1 ( p < 0.001), but not in lower velocity channels. Regression analyses showed a significant positive relationship with %OM (r 2 ¼ 0.88) and significant negative relationship with chl a (r 2 ¼ 0.77) and AFDM (r 2 ¼ 0.63). Algal taxa were dominated by Cladophora glomerata, Melosira varians and Pleurosira laevis. There was a significant positive relationship between treatment velocity and % C. glomerata ( p ¼ 0.007, r 2 ¼ 0.87) as diatoms were differentially removed with increasing treatment velocity. Our results demonstrate that pulsed flows can reduce periphyton standing crops in the Jackson River, but the discharge required to achieve this reduction would probably need to produce near-bed velocities >100 cm s À1. Further study is needed to establish specific flow targets and evaluate the direct and indirect effects of pulsed flows on ecological conditions in the Jackson River.

show abstract

Modeling evaluation of integrated strategies to meet proposed dissolved oxygen standards for the Chicago waterway system

Melching

Alp

2013

Journal of Environmental Management

View full text Add to dashboard Cite

Jackson River Modeling: 50‐Year Perspective

Cited by 4 publications

References 1 publication

Spatial and temporal patterns of periphyton chlorophyll a related to pulp and paper mill discharges in four us receiving streams

Spatial and temporal patterns of periphyton chlorophyll a related to pulp and paper mill discharges in four us receiving streams

Effects of pulsed flows on nuisance periphyton growths in rivers: a mesocosm study

Modeling evaluation of integrated strategies to meet proposed dissolved oxygen standards for the Chicago waterway system

Contact Info

Product

Resources

About