Rivers to reservoirs: hydrological drivers control reservoir function by affecting the abundance of submerged and floating macrophytes

Shivers, Stephen D.; Golladay, Stephen W.; Waters, Matthew N.; Wilde, Susan B.; Covich, Alan P.

doi:10.1007/s10750-018-3532-0

Cited by 22 publications

(6 citation statements)

References 61 publications

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“…The relationship between raw physicochemical parameters and covarying factors collected across the three sampling occasions was explored using Principal Component Analysis (PCA) performed in the 'Vegan' community ecology package v2.5-4 (Oksanen, 2015). Prior to performing the PCA, raw physicochemical parameters and covarying factors were centred and scaled (subtracted from sample means and divided by their standard deviate) to standardize measurements on different scales (Sergeant, Starkey, Bartz, Wilson, & Mueter, 2016). Statistical significance and coefficients of determination of physicochemical parameters and covarying factors were tested with permutation tests (999) using the 'envfit' function in 'Vegan' (Oksanen, 2015).…”

Section: Statistical Analysesmentioning

confidence: 99%

“…Invasive macrophytes readily establish in human‐modified environments such as hydrogeneration reservoirs (Havel, Lee, & Vander Zanden, 2005; Johnson, Olden, & Vander Zanden, 2008), where daily water level fluctuations from reservoir management (i.e., hydropeaking) play a critical role in their proliferation in littoral zones (Shivers, Golladay, Waters, Wilde, & Covich, 2018; Zhao, Jiang, Cai, & An, 2012). These beds can accumulate massive biomass over summer in temperate regions (Madsen, Chambers, James, Koch, & Westlake, 2001; Zohary & Ostrovsky, 2011), resulting in reduced native vegetation diversity (Andersen, Kragh, & Sand‐Jensen, 2017; Parveen, Asaeda, & Rashid, 2017), changes in community composition of other trophic levels such as benthic invertebrates (Kelly & Hawes, 2005; Kovalenko & Dibble, 2010), and loss of ecosystem functions and services (Bunn, Davies, Kellaway, & Prosser, 1998; Villamagna & Murphy, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Invasive macrophytes induce context‐specific effects on oxygen, pH, and temperature in a hydropeaking reservoir

Moore

Clearwater²,

Duggan

et al. 2020

River Research & Apps

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Dense macrophyte beds are known to produce extreme diurnal oxygen and temperature conditions in shallow lakes. However their influences in managed hydropeaking reservoirs has received limited attention. We measured dissolved oxygen, pH and water temperature in the Lake Kar apiro hydroreservoir, northern New Zealand, across a gradient of proportional water-column height occupied by the invasive macrophytes Egeria densa and Ceratophyllum demersum, which dominated in the upperriverine (variable water inflow) and lower-lacustrine (variable water level) sections, respectively. Hypoxia and anoxia events that occurred inside invasive macrophyte beds during their summer peak biomass accumulation period were more pronounced for C. demersum than for E. densa, and within the bottom 20% of the water column. In contrast, pH and temperature changed little in relation to proportional macrophyte height. Macrophyte species differences in the production of hypoxia and anoxia events increased when site-specific hydropeaking management covariates (depth, inflows, water level) were accounted for. This association with hydropeaking likely resulted from contrasting hydrodynamics in the lower-lacustrine and upper-riverine lake sections, where oxygen can decrease with higher water levels and lower water inflow rates, respectively. During the course of our study, some macrophyte beds were treated with herbicide, enabling us to document prolonged and sustained hypoxic/anoxic conditions near the bottom following spraying. These results underscore the adverse effects of invasive macrophytes on water physicochemical attributes that sustain aquatic biota, and highlight the context-dependent nature of these effects moderated by reservoir management for hydropeaking and macrophyte control.

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Section: Statistical Analysesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Invasive macrophytes induce context‐specific effects on oxygen, pH, and temperature in a hydropeaking reservoir

Moore

Clearwater²,

Duggan

et al. 2020

River Research & Apps

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“…It was essential to achieve the best possible compatibility of the modeling results with the results of velocity measurements during low flows of the river Vistula. Under such hydrological conditions, the reconstruction of the river ecosystem into a lake ecosystem is the most complete (Straškraba, 1999;Błędzki & Ellison, 2000;Soares et al, 2008;Cunha-Santino et al, 2016;Shivers et al, 2018). A reliable hydrodynamic model of the reservoir that also considers its operation under such conditions will be an important tool for predicting and analyzing changes in the reservoir's geoecosystem in an age of a changing climate.…”

Section: Introductionmentioning

confidence: 99%

Implementation of the AdH hydrodynamic model on the Włocławek Reservoir

et al. 2023

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The variation of water velocity in an artificial dam reservoir is influenced not only by the inflow discharge, but also by the bathymetry of the reservoir and the water level at the dam. The depiction of spatially complex variations in flow velocity through a reservoir would not be possible without the use of hydrodynamic models. A reliable hydrodynamic model of the reservoir is an effective tool for predicting and analyzing changes in the reservoir geoecosystem in an age of changing climate and risk of water stress. A depth-averaged two-dimensional AdH model was used to visualize the hydrodynamics of the Włocławek Reservoir. Running the model for eight different hydrological conditions delivered consistent results and allowed to calibrate the model parameters. Additionally, it provided a way to verify the data regarding the rating curve of the Vistula River upstream the reservoir.

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“…Human-modified environments like hydrogeneration reservoirs substantially alter hydrological regimes, with daily water level fluctuations from hydropeaking (i.e., intermittent storage and release of water through hydropower stations) related to variable inflows and outflows leading to contrasting flow conditions within the same water body. These conditions can promote establishment and determine the distribution of invasive macrophytes (Johnson et al 2008, Havel et al 2015, particularly in lake littoral zones (Zhao et al 2012, Shivers et al 2018. Reservoir management can exacerbate or mitigate the adverse environmental conditions produced by invasive submerged macrophytes near the lake-bed.…”

Section: Introductionmentioning

confidence: 99%

Hydrology-mediated invasive macrophyte impacts on freshwater mussels in a hydropeaking reservoir

Moore

Clearwater²,

Duggan

et al. 2021

Preprint

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Globally-threatened freshwater mussels belonging to the order Unionida (Bivalvia) may be adversely affected by dense beds of submerged macrophytes that modify habitat at the sediment-water interface. Such effects can be particularly pronounced in modified lentic ecosystems such as reservoirs which are subject to hydrological regimes (e.g., hydropeaking) that can exacerbate macrophyte-mediated impacts, including anoxic or hypoxic conditions, the related release of toxic ions (e.g., ammonia), and silt accumulation that inhibits filter-feeding. Accordingly, we compared how population size-structure and biomass of the New Zealand mussel Echyridella menziesii varied inside and outside of dense beds of invasive macrophytes known to have similar impacts on water chemistry (e.g., anoxia) in two northern New Zealand hydroreservoir locations with contrasting hydrology (lacustrine location dominated by Ceratophyllum demersum; and riverine location dominated by Egeria densa). We found adverse sediment-water interface conditions were not always associated with dense submerged macrophyte beds in littoral zones. Nonetheless, where they occurred, adverse sediment-water interface conditions were primary drivers in reduced mussel density and adult skewed size-structure, inferring reduced recruitment. Disentangling direct and indirect effects with structural equation modelling indicated that increased pore-water ammonia did not impact these primarily adult populations of freshwater mussels. Increased sediment organic matter, silt, and previously recorded hypoxia and anoxia were exacerbated in the lacustrine section where variable flows promoting water mixing were not present to reduce their effects. High densities of mussels less than 40 mm in length were associated with favourable sediment-water interface conditions of low silt and sediment organic matter, suggesting that enhanced water exchange in and around macrophyte beds may increase juvenile mussel survival in littoral zones of the riverine lake section. Our findings highlight a potential role for hydropeaking management in mitigating the development of adverse physicochemical conditions, and underscore the context-specific effects that dense non-native macrophyte beds can have on mussel populations.

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Rivers to reservoirs: hydrological drivers control reservoir function by affecting the abundance of submerged and floating macrophytes

Cited by 22 publications

References 61 publications

Invasive macrophytes induce context‐specific effects on oxygen, pH, and temperature in a hydropeaking reservoir

Invasive macrophytes induce context‐specific effects on oxygen, pH, and temperature in a hydropeaking reservoir

Implementation of the AdH hydrodynamic model on the Włocławek Reservoir

Hydrology-mediated invasive macrophyte impacts on freshwater mussels in a hydropeaking reservoir

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