Evaluating carbon storage on subalpine lake deltas

Scott, Daniel N.; Wohl, Ellen

doi:10.1002/esp.4110

Cited by 10 publications

(8 citation statements)

References 64 publications

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“…In contrast to other studies, which find a clear decrease in organic carbon content with depth, this is not the case for the Upper Dee, where at most locations, alterations between the different sediment units can be observed (e.g. Figure ) (Scott and Wohl, ; Sutfin and Wohl, ; Zhao et al, ). As a result, the distribution of the organic carbon concentration with depth varies between different locations and is related to the local stratigraphy.…”

Section: Discussioncontrasting

confidence: 98%

Geomorphic controls on floodplain sediment and soil organic carbon storage in a Scottish mountain river

Swinnen

Daniëls

Maurer

et al. 2019

Earth Surf Processes Landf

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River floodplains constitute an important element in the terrestrial sediment and organic carbon cycle and store variable amounts of carbon and sediment depending on a complex interplay of internal and external driving forces. Quantifying the storage in floodplains is crucial to understand their role in the sediment and carbon cascades. Unfortunately, quantitative data on floodplain storage are limited, especially at larger spatial scales. Rivers in the Scottish Highlands can provide a special case to study alluvial sediment and carbon dynamics because of the dominance of peatlands throughout the landscape, but the alluvial history of the region remains poorly understood. In this study, the floodplain sediment and soil organic carbon storage is quantified for the mountainous headwaters of the River Dee in eastern Scotland (663 km 2), based on a coring dataset of 78 floodplain crosssections. Whereas the mineral sediment storage is dominated by wandering gravel-bed river sections, most of the soil organic carbon storage can be found in anastomosing and meandering sections. The total storage for the Upper Dee catchment can be estimated at 5.2 Mt or 2306.5 Mg ha-1 of mineral sediment and 0.7 Mt or 323.3 Mg C ha-1 of soil organic carbon, which is in line with other studies on temperate river systems. Statistical analysis indicates that the storage is mostly related to the floodplain slope and the geomorphic floodplain type, which incorporates the characteristic stream power, channel morphology and the deposit type. Mapping of the geomorphic floodplain type using a simple classification scheme shows to be a powerful tool in studying the total storage and local variability of mineral sediment and soil organic carbon in floodplains.

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Section: Discussioncontrasting

confidence: 98%

Geomorphic controls on floodplain sediment and soil organic carbon storage in a Scottish mountain river

Swinnen

Daniëls

Maurer

et al. 2019

Earth Surf Processes Landf

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“…Decomposition rates of coarse particulate organic matter and downed wood in the floodplains can be significantly higher than adjacent uplands (Neatrour et al ., 2004; Barbosa et al ., 2017), but much of the organic carbon released through breakdown and decomposition is added to floodplain soils in which anoxic conditions limit microbial respiration and release of carbon to the atmosphere. The large carbon stocks in rivers reflect high primary productivity in many floodplain and riparian forests relative to adjacent uplands (Naiman and Décamps, 1997), as well as continually moist or saturated floodplain and delta soils that retain organic carbon in a reduced state (Sutfin et al ., 2016; Scott and Wohl, 2017, 2018a).…”

Section: Case Studiesmentioning

confidence: 99%

Reflections on the history of research on large wood in rivers

Swanson

Gregory

Iroumé

et al. 2020

Earth Surf Processes Landf

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Dynamics and functions of large wood have become integral considerations in the science and management of river systems. Study of large wood in rivers took place as monitoring of fish response to wooden structures placed in rivers in the central United States in the early 20th century, but did not begin in earnest until the 1970s. Research has increased in intensity and thematic scope ever since. A wide range of factors has prompted these research efforts, including basic understanding of stream systems, protection and restoration of aquatic ecosystems, and environmental hazards in mountain environments. Research and management have adopted perspectives from ecology, geomorphology, and engineering, using observational, experimental, and modelling approaches. Important advances have been made where practical information needs converge with institutional and science leadership capacities to undertake multi‐pronged research programmes. Case studies include ecosystem research to inform regulations for forest management; storage and transport of large wood as a component in global carbon dynamics; and the role of wood transport in environmental hazards in mountain regions, including areas affected by severe landscape disturbances, such as volcanic eruptions. As the field of research has advanced, influences of large wood on river structures and processes have been merged with understanding of streamflow and sediment regimes, so river form and function are now viewed as involving the tripartite system of water, sediment, and wood. A growing community of researchers and river managers is extending understanding of large wood in rivers to climatic, forest, landform, and social contexts not previously investigated. © 2020 John Wiley & Sons, Ltd.

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“…Data availability. Data to support the analyses presented here can be found in Table S1 and in the Colorado State University Digital Repository (Scott and Wohl, 2018a).…”

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confidence: 90%

Geomorphic regulation of floodplain soil organic carbon concentration in watersheds of the Rocky and Cascade Mountains, USA

Scott

Wohl

2018

Earth Surf. Dynam.

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Abstract. Mountain rivers have the potential to retain OC-rich soil and store large quantities of organic carbon (OC) in floodplain soils. We characterize valley bottom morphology, floodplain soil, and vegetation in two disparate mountain river basins: the Middle Fork Snoqualmie in the Cascade Mountains and the Big Sandy in the Wind River Range of the Rocky Mountains. We use this dataset to examine variability in OC concentration between these basins as well as within them at multiple spatial scales. We find that although there are some differences between basins, much of the variability in OC concentration is due to local factors, such as soil moisture and valley bottom geometry. From this, we conclude that local factors likely play a dominant role in regulating OC concentration in valley bottoms and that interbasin differences in climate or vegetation characteristics may not translate directly into differences in OC storage. We also use an analysis of OC concentration and soil texture by depth to infer that OC is input to floodplain soils mainly by decaying vegetation, not overbank deposition of fine, OC-bearing sediment. Geomorphology and hydrology play strong roles in determining the spatial distribution of soil OC in mountain river corridors.

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Evaluating carbon storage on subalpine lake deltas

Cited by 10 publications

References 64 publications

Geomorphic controls on floodplain sediment and soil organic carbon storage in a Scottish mountain river

Geomorphic controls on floodplain sediment and soil organic carbon storage in a Scottish mountain river

Reflections on the history of research on large wood in rivers

Geomorphic regulation of floodplain soil organic carbon concentration in watersheds of the Rocky and Cascade Mountains, USA

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