Estimating and scaling stream ecosystem metabolism along channels with heterogeneous substrate

Hondzo, Miki; Voller, V. R.; Morris, Mark W. L.; Foufoula‐Georgiou, Efi; Finlay, Jacques C.; Ganti, Vamsi; Power, Mary E.

doi:10.1002/eco.1391

Cited by 21 publications

(27 citation statements)

References 49 publications

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“…O'Connor et al (2012) found that even small storm pulses can induce partial bed mobilization resulting in increased turbidity and a reduction in GPP. Hondzo et al (2013) demonstrated that shear stress had a more significant impact on GPP than ER.…”

Section: Discussionmentioning

confidence: 97%

The influence of riparian vegetation and season on stream metabolism of Valley Creek, Minnesota

Hornbach

Beckel

Hustad

et al. 2015

Journal of Freshwater Ecology

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Climate change will undoubtedly influence stream ecosystems by affecting water temperature, discharge, and riparian vegetation phenology. It has been suggested that increasing the extent of riparian buffers may help to mitigate these impacts and contribute to ecosystem resilience. Measures of stream metabolism are one way to examine the changes in ecosystem function as they respond to climate change and management strategies used to respond to these impacts. In this study we examine the influence of riparian vegetation (open vs. forest) and season on ecosystem metabolism in a small stream in MN, USA. The stream was heterotrophic regardless of the type of riparian vegetation but the presence of a forested buffer depressed gross primary production (GPP) and also resulted in lower (less negative) ecosystem respiration (ER) and net ecosystem production (NEP). We also found significant daily and seasonal variation in GPP, ER, and NEP. Stream metabolism was more variable in the fall than in the summer. The study design was complicated by the fact that there were differences in groundwater dynamics between the two locations; the forested location was a losing stream while the open location was a gaining stream. Despite the fact that groundwater input likely influenced the oxygen dynamics of the open location, the impact of the forest buffer outweighed the impact of groundwater. The presence of a forested riparian corridor resulted in decreased GPP likely through the attenuation of light. The low O 2 groundwater input at the open location likely biased measures of ER and NEP. Modifying stream corridors with increased forest vegetation to offset the impacts of climate change will likely result in less in-stream primary production and a shift to a more heterotrophic system. This shift will undoubtedly influence many ecosystem functions in-stream systems.

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Section: Discussionmentioning

confidence: 97%

The influence of riparian vegetation and season on stream metabolism of Valley Creek, Minnesota

Hornbach

Beckel

Hustad

et al. 2015

Journal of Freshwater Ecology

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“…The mass balance of oxygen in a river reach can be expressed by a complete advective‐dispersive mass transport model as (Hondzo et al. ):…”

Section: Methodsmentioning

confidence: 99%

“…Although ecosystem metabolism of a stream can be difficult to measure, it can be understood directly from mass balance relationships on dissolved oxygen (DO) within a section of the stream. The mass balance of oxygen in a river reach can be expressed by a complete advective-dispersive mass transport model as (Hondzo et al 2013):…”

Section: Methodological Backgroundmentioning

confidence: 99%

“…; Hondzo et al. ). Ecosystem metabolism is a common measure of stream ecosystem function, as it integrates processes of carbon and nutrient metabolism through measures of respiration and primary production (Odum ; Dodds ; Hall et al.…”

Section: Introductionmentioning

confidence: 96%

“…Generally, the perspective on stream restoration is that structural changes in the physical environment, such as re-directive flow structures, impart hydraulic changes that influence ecosystem structure, which can be expressed as rates of functional change over time (Baldigo et al 2008;B€ ohlke et al 2009). These changes are observed in streams at the reach scale, the typical scale for restoration intervention, inasmuch as the reach scale is defined by channel-controlling hydraulic phenomena (Maddock 1999;Bridge 2003) as well as by the emergence of functional properties such as ecosystem metabolism (Riley and Dodds 2013;Hoellein et al 2013;Hondzo et al 2013). Ecosystem metabolism is a common measure of stream ecosystem function, as it integrates processes of carbon and nutrient metabolism through measures of respiration and primary production (Odum 1956;Dodds 2006;Hall et al 2016).…”

Section: Introductionmentioning

confidence: 99%

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Metabolic Variance: A Metric to Detect Shifts in Stream Ecosystem Function as a Result of Stream Restoration

Blersch

Atkinson

2019

J American Water Resour Assoc

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The restoration of lotic ecosystems as currently practiced is constrained by a limited understanding of the emergence of stream ecosystem functions and their linkages to perceived ecosystem services valued by society. An investigation was made into the connections between ecosystem function and hydraulic structure of a stream impacted by gravel mining operations in western New York. Stream ecosystem metabolic parameters were measured using two‐point dissolved oxygen diurnals on multiple reaches of the same stream, and were correlated with geomorphic and hydraulic descriptors of the same reaches. Results showed ecosystem metabolism at the reach scale varied as a function of geomorphic condition, where higher primary production and community respiration (CR) were observed for reaches observed to be unstable vs. those that were stable or restored. The metabolic variance of a stream ecosystem, proposed as a measure of the degree to which a desired ecological functional goal has been achieved post‐restoration, is determined as the rate of change of the ratio of primary production to CR. Shifts in the P/R ratio were evident in reaches post‐restoration, presumably as a result of changes in hydraulic structure, supporting the utility of the ratio by describing a direct link between instream hydraulic conditions and ecosystem function.

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Transverse spatiotemporal variability of lowland river properties and effects on metabolic rate estimates

et al. 2014

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[1] Variability of river properties such as temperature, velocity, dissolved oxygen (DO), and light at small scales (centimeters to meters) can play an important role in the local exchanges of energy and mass. We hypothesize that significant transverse cross-sectional DO variation is observable within a river. Such variation may influence conventional singlestation metabolic rate (primary production and respiration) estimates with respect to DO probe location, and reveal important connections between physical and biogeochemical processes and their drivers in rivers. Using a mobile sensor system, we measured river properties across a bend in the lower Merced River in Central California under stationary flow conditions in April and September. Cross-sectional temperature, DO, and chlorophylla concentrations exhibited modest but significant gradients, which varied in magnitude and direction on a diel basis. The spatiotemporal variation was consistent with reach geomorphology and incident light patterns. Gross primary production (GPP), community respiration (CR 24 ), and net ecosystem production (NEP) rates estimates derived from local DO and temperature time series varied by 3-10% over the river cross section, with greater variation in late summer. The presence of transverse metabolic rate gradients in this relatively simple reach implies the existence of substantial gradients in more complex river regimes, such as those spanning distinctively different microhabitats, transient storage zones, and related distributed biogeochemical zones.Citation: Villamizar, S. R., H. Pai, C. A. Butler, and T. C. Harmon (2014), Transverse spatiotemporal variability of lowland river properties and effects on metabolic rate estimates, Water Resour. Res., 50,[482][483][484][485][486][487][488][489][490][491][492][493]

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Estimating and scaling stream ecosystem metabolism along channels with heterogeneous substrate

Cited by 21 publications

References 49 publications

The influence of riparian vegetation and season on stream metabolism of Valley Creek, Minnesota

The influence of riparian vegetation and season on stream metabolism of Valley Creek, Minnesota

Metabolic Variance: A Metric to Detect Shifts in Stream Ecosystem Function as a Result of Stream Restoration

Transverse spatiotemporal variability of lowland river properties and effects on metabolic rate estimates

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