Serpentine Revegetation: A Review

O’Dell, Ryan E.; Claassen, Victor P.

doi:10.1656/045.016.0519

Cited by 28 publications

(24 citation statements)

References 60 publications

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“…Local plant species are recommended because of their adaptation to local climatic and edaphic conditions (Baker 1999). Suitable species must be relatively easy to collect as bulk seed accessions and have high success rates of germination, establishment and growth (O'Dell and Claassen 2009). The selected species may be propagated via direct seeding, transplantation, or by using cuttings Li et al 2003a).…”

Section: Nickel Phytomining Operationsmentioning

confidence: 99%

Current status and challenges in developing nickel phytomining: an agronomic perspective

et al. 2016

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Background Nickel (Ni) phytomining operations cultivate hyperaccumulator plants ('metal crops') on Ni-rich (ultramafic) soils, followed by harvesting and incineration of the biomass to produce a high-grade 'bio-ore' from which Ni metal or pure Ni salts are recovered. Scope This review examines the current status, progress and challenges in the development of Ni phytomining agronomy since the first field trial over two decades ago. To date, the agronomy of less than 10 species has been tested, while most research focussed on Alyssum murale and A. corsicum. Nickel phytomining trials have so far been undertaken in Albania, Canada, France, Italy, New Zealand, Spain and USA using ultramafic or Ni-contaminated soils with 0.05-1 % total Ni. Conclusions N, P and K fertilisation significantly increases the biomass of Ni hyperaccumulator plants, and causes negligible dilution in shoot Ni concentration. Organic matter additions have pronounced positive effects on the biomass of Ni hyperaccumulator plants, but may reduce shoot Ni concentration. Soil pH adjustments, S additions, N fertilisation, and bacterial inoculation generally increase Ni phytoavailability, and consequently, Ni yield in 'metal crops'. Calcium soil amendments are necessary because substantial amounts of Ca are removed through the harvesting of 'bio-ore'. Organic amendments generally improve the physical properties of ultramafic soil, and soil moisture has a pronounced positive effect on Ni yield. Repeated 'metal crop' harvesting depletes soil phytoavailable Ni, but also promotes transfer of non-labile soil Ni to phytoavailable forms. Traditional chemical soil extractants used to estimate phytoavailability of trace e l em en ts a re of limi t ed us e t o p re dic t Ni phytoavailability to 'metal crop' species and hence Ni uptake.

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Section: Nickel Phytomining Operationsmentioning

confidence: 99%

Current status and challenges in developing nickel phytomining: an agronomic perspective

et al. 2016

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“…Lateritic topsoils, which are usually removed and stored apart before mining, play an essential role in restoration (Bradshaw 1997;O'Dell and Claassen 2009;Losfeld et al 2015). They contain elements to improve the chemical (organic matter, nutrients) as well as the biological (microorganisms, plant propagules) fertility of the soil (Bradshaw 1997;Echevarria and Morel 2015).…”

Section: Introductionmentioning

confidence: 99%

Chemico‐mineralogical changes of ultramafic topsoil during stockpiling: implications for post‐mining restoration

Quintela-Sabarís

L'Huillier

Mouchon

et al. 2018

Ecological Research

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Lateritic topsoils, which are usually removed and stored apart before mining operations take place, play an essential role in the success of post‐mining restoration. They contain elements to recover chemical (organic matter, nutrients) and biological (seed and bud banks, microorganisms) fertility of the soil. Conserving topsoil fertility during storage time is essential for a successful use of topsoil during restoration. In this study, different chemico‐mineralogical properties of a lateritic topsoil from the Goro nickel mine (New Caledonia) were monitored from its original in situ emplacement on the soil profile, immediately after its stockpiling and after 24 months of storage. Our analyses show that topsoil experienced noticeable changes immediately after storage, mostly produced by mixing of different soil profiles. Cation Exchange Capacities and concentrations of most elements did not vary even after 24 months of storage. However, a slight reduction of Ni, Cr, K, Na and of the C:N ratio, and an increase of Ca have been observed. Stockpiling has not affected negatively the chemical fertility of the topsoil, although biological parameters should be considered to have a complete view of stockpiling sustainability.

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“…Hydroseeding is a common sowing technique for quarry and road-side rehabilitation that is increasingly used in ecological restoration; this approach often requires the use of various mulches, stabilisers, fertilisers as well as mixtures of commercial and native species seeds (Matesanz et al, 2006;Brofas et al, 2007;García-Palacios et al, 2010). The inclusion of native species is increasingly being used in restoration projects especially under adverse climatic and soil conditions (Matesanz & Valladares, 2007;Bochet et al, 2010;Oliveira et al, 2012) and is particularly relevant when the recovery of specific vegetation targets associated with singular substrates is the restoration goal (O'Dell & Claassen, 2009;Whiting et al, 2010;Ballesteros et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Restoration of Gypsicolous Vegetation on Quarry Slopes: Guidance for Hydroseeding under Contrasting Inclination and Aspect

et al. 2017

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The establishment of gypsicolous vegetation of high conservation value on land impacted by quarrying requires restoration measures to overcome constraints imposed by the new landforms created in the process. The aim of this study was to assess the suitability of three standard hydroseeding methods to restore gypsicolous vegetation on quarry spoil slopes under a dry Mediterranean climate. The treatments were as follows: paper cellulose mulch, paper cellulose mulch + organic blanket, and wood fibre mulch, compared against a control. These treatments were tested on two slopes (10–15% vs 60–65%) and two contrasting aspects (north vs south). We evaluated the cover of all plant species 2·8 years after treatment, assessing both target gypsicolous species and non‐target species. Our results showed strong compositional and cover differences between hydroseeded and control plots. Control plots had a low cover of target species with a vegetation composed of early‐successional species that had the potential to hinder target species establishment over time. All hydroseeding treatments improved target vegetation cover, with wood fibre performing best in most situations studied here, alternatives being the cheaper but less effective paper mulch on shallow slopes, or the more expensive paper mulch + blanket on steep slopes in case of high erosion risk. Shallow and southern‐steep slopes were more suitable for the recovery of gypsum vegetation by hydroseeding, compared to northern‐steep slopes where non‐target species developed more readily outcompeting target species. These results will help to guide management decisions to restore gypsicolous vegetation by hydroseeding in disturbed gypsum habitats. Copyright © 2017 John Wiley & Sons, Ltd.

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Serpentine Revegetation: A Review

Cited by 28 publications

References 60 publications

Current status and challenges in developing nickel phytomining: an agronomic perspective

Current status and challenges in developing nickel phytomining: an agronomic perspective

Chemico‐mineralogical changes of ultramafic topsoil during stockpiling: implications for post‐mining restoration

Restoration of Gypsicolous Vegetation on Quarry Slopes: Guidance for Hydroseeding under Contrasting Inclination and Aspect

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