Coupling legacy geomorphic surface facies to riparian vegetation: Assessing red cedar invasion along the Missouri River downstream of Gavins Point dam, South Dakota

Greene, Samantha L.; Knox, James C.

doi:10.1016/j.geomorph.2013.08.012

Cited by 36 publications

(41 citation statements)

References 37 publications

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“…Through flow regulation, land use conversion, and reservoir inundation, significant declines (estimated 70%) in floodplain forest area have occurred since the 1890s (Dixon et al, ). Present‐day forests are dominated by predam (pre‐1950s) age classes of trees, with evidence of declines in recruitment of new cottonwood patches and an increased abundance of invasive trees (e.g., Russian olive and eastern red cedar; Dixon et al, ; Greene & Knox, ; Johnson et al, ).…”

Section: Methodsmentioning

confidence: 99%

“…monilifera (Aiton) Eckenwalder) and increased abundances of non‐native riparian ( Elaeagnus angustifolia L., Tamarix ramosissima Ledeb.) and native upland ( Juniperus virginiana L.) tree species (Dixon, Johnson, Scott, Bowen, & Rabbe, ; Greene & Knox, ; Johnson, ; Johnson et al, ) within the historical floodplain. Restoration of flow and sediment regimes has been suggested as necessary to counteract the negative effects of chronic flow regulation (NRC, ) on the Missouri and other large rivers but is challenging given infrastructural constraints (e.g., dam operations), long‐term changes in channel morphology, and societal and legal impediments to flow management (Johnson, Volke, Scott, & Dixon, ).…”

Section: Introductionmentioning

confidence: 99%

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Effects of a large flood on woody vegetation along the regulated Missouri River, USA

et al. 2018

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In 2011, a large, long‐duration flood occurred on the regulated Missouri River following six decades without flooding. This study evaluated the effects of the flood on riparian forest structure and composition. In 2012, 168 forest sites sampled in 2006–2009 were resampled on five floodplain segments between Montana and Missouri, with 80 sampled again in 2013–2014. Changes in riparian forest area over 2006–2012, by age class and segment, were assessed using aerial imagery and GIS. Repeated‐measures analysis of variance was used to examine (a) the initial effects of the flood (preflood to 2012) on tree and shrub stem densities, (b) postflood (2012–2014) changes in stem density, and (c) species‐level responses for cottonwood (Populus deltoides), eastern red cedar (Juniperus virginiana), and Russian olive (Elaeagnus angustifolia). Across the study area, forest area declined 6–38% among age classes, with the greatest declines in the youngest classes. Tree density declined 19–49% across segments from preflood to 2012 but did not change significantly from 2012 to 2014. Shrub density declined 52–89% across segments from preflood to 2012, with 73–78% declines in the two youngest age classes, but increased by 42% from 2012 to 2014. Cottonwood and Russian olive, but not red cedar, showed partial recovery in the shrub/sapling layer, increasing from 2012 to 2014. Although flooding is important for floodplain forest health, the 2011 flood had mixed effects, with significant mortality of native floodplain trees and shrubs and only limited cottonwood recruitment. The initial decline in invasive species (Russian olive and red cedar), however, suggests that flooding may be an effective management tool.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of a large flood on woody vegetation along the regulated Missouri River, USA

et al. 2018

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“…Although we have not applied our method to lower energy environments, such as higher stream order, lower gradient, depositional environments, other studies have examined and documented vegetative succession in lower-energy environments (Greco et al, 2007;Greene and Knox, 2014). It should also be stated that the current requirement of manual adjustments of our proposed method does not preclude future improvement of the technique's automation.…”

Section: Floodplain Structures and Heterogeneitymentioning

confidence: 99%

From Grain to Floodplain: Evaluating heterogeneity of floodplain hydrostatigraphy using sedimentology, geophysics, and remote sensing

Malenda

Sutfin

Guryan

et al. 2019

Earth Surf Processes Landf

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Stratigraphy is a fundamental component of floodplain heterogeneity and hydraulic conductivity and connectivity of alluvial aquifers, which affect hydrologic processes such as groundwater flow and hyporheic exchange. Watershed‐scale hydrological models commonly simplify the sedimentology and stratigraphy of floodplains, neglecting natural floodplain heterogeneity and anisotropy. This study, conducted in the upper reach of the East River in the East River Basin, Colorado, USA, combines point‐, meander‐, and floodplain‐scale data to determine key features of alluvial aquifers important for estimating hydrologic processes. We compare stratigraphy of two meanders with disparate geometries to explore floodplain heterogeneity and connectivity controls on flow and transport. Meander shape, orientation, and internal stratigraphy affected residence time estimates of laterally exchanged hyporheic water. Although the two meanders share a sediment source, vegetation, and climate, their divergent river migration histories resulted in contrasting meander hydrofacies. In turn, the extent and orientation of these elements controlled the effective hydraulic conductivity and, ultimately, estimates of groundwater transport and hyporheic residence times. Additionally, the meanders’ orientation relative to the valley gradient impacted the hydraulic gradient across the meanders—a key control of groundwater velocity. Lastly, we combine our field data with remotely sensed data and introduce a potential approach to estimate key hydrostratigraphic packages across floodplains. Prospective applications include contaminant transport studies, hyporheic models, and watershed models. © 2019 John Wiley & Sons, Ltd.

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“…Monitoring forest conditions is necessary to identify compositional changes because of time lags and legacy effects in how forests respond to hydrologic and geomorphic changes (Katz and others, 2005;Dufour and Piégay, 2008;Greene and Knox, 2014). Long-lived floodplain tree species can persist for long periods in conditions unsuitable for the regeneration of those species and in conditions that decrease growth.…”

Section: Project Summary and Management Recommendationsmentioning

confidence: 99%

Altered hydrologic and geomorphic processes and bottomland hardwood plant communities of the lower White River Basin

King¹,

Keim²,

Hupp³

et al. 2016

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Coupling legacy geomorphic surface facies to riparian vegetation: Assessing red cedar invasion along the Missouri River downstream of Gavins Point dam, South Dakota

Cited by 36 publications

References 37 publications

Effects of a large flood on woody vegetation along the regulated Missouri River, USA

Effects of a large flood on woody vegetation along the regulated Missouri River, USA

From Grain to Floodplain: Evaluating heterogeneity of floodplain hydrostatigraphy using sedimentology, geophysics, and remote sensing

Altered hydrologic and geomorphic processes and bottomland hardwood plant communities of the lower White River Basin

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