Soil ripening following dam removal

Lafrenz, Martin; Bean, Robert A.; Uthman, Daniel

doi:10.1080/02723646.2013.799033

Cited by 9 publications

(4 citation statements)

References 24 publications

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“…And the most commonly cited benefit to host plants is nutrient acquisition; mycorrhizal pathways can contribute up to 80–90% of plant nitrogen (N) and phosphorus (P; van der Heijden et al ). Nutrient availability in soils is bounded by chemical conditions and mediated through biological activities, both of which are highly altered and slow to recover in dewatered reservoirs (Lafrenz et al ). Thus, dewatered reservoirs provide an environment where the cost‐benefit ratio for host plants is low, and the symbiosis should function as a mutualism.…”

Section: Introductionmentioning

confidence: 99%

Availability and function of arbuscular mycorrhizal and ectomycorrhizal fungi during revegetation of dewatered reservoirs left after dam removal

Cortese

Bunn

2016

Restoration Ecology

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Revegetation following dam removal projects may depend on recovery of arbuscular mycorrhizal (AM) and ectomycorrhizal (EM) fungal communities, which perform valuable ecosystem functions. This study assessed the availability and function of AM and EM fungi for plants colonizing dewatered reservoirs following a dam removal project on the Elwha River, Olympic Peninsula, Washington, United States. Availability was assessed via AM fungal spore density in soils and EM root tip colonization of Salix sitchensis (Sitka willow) in an observational field study. The effect of mycorrhizal fungi from 4 sources (reservoir soils, commercial inoculum, and 2 mature plant community soils) on growth and nutrient status of S. sitchensis was quantified in a greenhouse study. AM fungal spores and EM root tips were present in all field samples. In the greenhouse, plants receiving reservoir soil inoculum had only incipient mantle formation, while plants receiving inoculum from mature plant communities had fully formed EM root tips. EM formation corresponded with alleviation of phosphorus stress in plants (lower shoot nitrogen:phosphorus). Thus, revegetating plants have access to AM and EM fungi following dam removal, and EM formation may be especially important for plant P uptake in reservoir soils. However, availability of mycorrhizal fungi declines with distance from established plant communities. Furthermore, EM fungal communities in recently dewatered reservoirs may not be as effective at forming beneficial mycorrhizae as those from mature plant communities. Whole soil inoculum from mature plant communities may be important for the success of revegetating plants and recovery of mycorrhizal fungal communities.

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Section: Introductionmentioning

confidence: 99%

Availability and function of arbuscular mycorrhizal and ectomycorrhizal fungi during revegetation of dewatered reservoirs left after dam removal

Cortese

Bunn

2016

Restoration Ecology

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“…Previous studies have shown that multiple processes affect the ripening of dredged sediments and subsequent soil formation (Vermeulen 2007;Sheehan et al 2010;Lafrenz et al 2013). Some of the functional properties that play an important role in the nature of ripening and affect the properties of the soil are the type of organic matter (Akker et al 2008;Berglund and Berglund 2011;Schmidt et al 2011;Urbanek et al 2011;Guenet et al 2012;Aich et al 2013), pH and nutrient content (Ayuke et al 2011;Knicker 2011;Leue and Lang 2012), water retention capacity (Berglund and Berglund 2011;Bolte et al 2011;Querner et al 2012), dry bulk density (van Asselen 2011), aggregate stability (Amézketa 1999;Six et al 2004;Elmholt et al 2008;Munkholm 2011;Deviren Saygın et al 2012) and load-bearing capacity (Gui et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Functional properties of soils formed from biochemical ripening of dredged sediments—subsidence mitigation in delta areas

et al. 2016

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Purpose In delta areas, dense networks of canals have been developed through time and have to be periodically dredged. Lowering the groundwater level in delta areas deepens the aerobic zone, leading to the oxidation of organic matter and possibly to land subsidence. The use of the dredged sediments on land can be a solution to mitigate land subsidence in delta areas. Materials and methods Five types of dredged sediments with different organic matter content and particle size distribution were dewatered for 7 days and then submitted to biochemical ripening during 141 days on a laboratorial scale with constant temperature and relative humidity. The functional properties analysed were the type and content of organic matter, pH, total C, N, P and S, dry bulk density, water retention capacity, aggregate stability and load-bearing capacity. Results and discussion After biochemical ripening, there was no significant loss in the mass of organic matter but there was an increase in the fraction of stable organic compounds, observed by an increase in oxygen-bearing compounds and a decrease in hydrocarbons during biochemical ripening. The pH was not affected by biochemical ripening, and the total C, N, P and S concentrations are high and therefore the dredged sediments can improve the quality of the land. Most volume lost during dewatering and biochemical ripening can be attributed to the loss of water. The water retention capacity of the dredged sediments changed with biochemical ripening. The soils formed from biochemical ripening have very stable aggregates, and its load-bearing capacity is enough to sustain cattle and tractors. Conclusions Most volume lost during dewatering and biochemical ripening can be attributed to the loss of water and not organic matter. Therefore, the studied dredged sediments have potential to mitigate land subsidence in delta areas when spread on land.

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“…We observed that at Featherston Avenue Reserve, 6 years after the 2010–2011 liquefaction events, the sand comprising the sand blow, sills and dikes had weathered to a pale yellow (5Y 5/2) with or without ferruginous redox mottles. The vented sand appears to be particularly prone to chemical “ripening”, which occurs when it is brought from the anoxic zone beneath the water table to the aerated zone above the water table (Lafrenz, Bean, & Uthman, ; Pons & Zonneveld, ; Vermeulen, Grotenhuis, Joziasse, & Rulkens, ).…”

Section: Methodsmentioning

confidence: 99%

When the earth blisters: Exploring recurrent liquefaction features in the coastal system of Christchurch, New Zealand

et al. 2017

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The 14 February, or Valentine's Day, 2016 earthquake located offshore of Christchurch produced a new generation of liquefaction in the coastal environment of Christchurch, an environment of recurrent liquefaction during the 2010-2011 Canterbury Earthquake Sequence. The Valentine's Day earthquake occurred while trenches were open at a site in the coastal environment for studying the 2010-2011 liquefaction features. Observations in the 2016 trenches provided insights into the formation of a suite of surface and subsurface liquefaction features characteristic of the dune deposits, related to the persistent shallow water table, well-sorted sands within the liquefiable layer and the soil above. Given these conducive conditions, there is a high potential that all earthquakes capable of inducing liquefaction may have been recorded during formation of the dunes near Christchurch. However, overprinting by subsequent generations of liquefaction features may be common and present challenges in unravelling the event history.

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Soil ripening following dam removal

Cited by 9 publications

References 24 publications

Availability and function of arbuscular mycorrhizal and ectomycorrhizal fungi during revegetation of dewatered reservoirs left after dam removal

Availability and function of arbuscular mycorrhizal and ectomycorrhizal fungi during revegetation of dewatered reservoirs left after dam removal

Functional properties of soils formed from biochemical ripening of dredged sediments—subsidence mitigation in delta areas

When the earth blisters: Exploring recurrent liquefaction features in the coastal system of Christchurch, New Zealand

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