An Assessment of the Direct Revegetation Strategy on the Tailings Storage Facility at Kidston Gold Mine, North Queensland, Australia

Gillespie, Melina; Gravina, A. J.; Currey, Anne

doi:10.36487/acg_repo/605_30

Cited by 12 publications

(10 citation statements)

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“…Species richness targets are rarely found in published completion criteria (Nichols 2006) apart from those for Alcoa’s Western Australian mines (Elliot et al 1996) and instead have vegetation cover requirements similar to those in the United States. Internal species richness targets have been set for the Kidson gold mine in Australia, and these were met when topsoil cover was good at 3–7 years old but failed if salt emerged from the subsurface tailings material (Mulligan et al 2006). In a degraded grassy eucalypt woodland (not a mined area), Wilkins et al (2003) assessed restoration success using a variety of plant diversity measures.…”

Section: Discussionmentioning

confidence: 99%

Restoring a Jarrah Forest Understorey Vegetation after Bauxite Mining in Western Australia

Koch

2007

Restoration Ecology

166

176

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The Southwest of Western Australia is one of the world's biodiversity hotspots. In the jarrah forest there are at least 300-400 plant species in vegetation that is typically mined and as many as 163 species per 0.1 ha. Hence, restoring the plant species to post-mining areas is seen as a priority. Approximately 70% of understorey richness is returned via the direct transfer of fresh topsoil. Additions of provenance-correct seeds of between 78 and 113 native jarrah forest species add significantly to post-mining species richness. Many of the broadcast seeds receive a prebroadcast heat or smoke treatment to increase germinability. Approximately 20 additional species are produced by vegetative multiplication or tissue culture and planted into restored areas. Though sequential improvements during the past 30 years, Alcoa now achieves its target to establish in restored areas the same number of native plant species per 80 m 2 as the natural forest. Resampling of permanent plots revealed that species composition of older post-mining areas does not become more similar to unmined forest over one to three decades. Few species (mostly orchids) establish after the first year of restoration and adherence to the initial floristic composition model of forest succession applies to jarrah forest mine site restoration in Western Australia. Alcoa's strategy, therefore, is to maximize the diversity of understorey species in newly restored sites at the first attempt. Future research will investigate methods to further increase the density of the fire resprouter species, a group of species currently under-represented in the restored bauxite mining sites.

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Section: Discussionmentioning

confidence: 99%

Restoring a Jarrah Forest Understorey Vegetation after Bauxite Mining in Western Australia

Koch

2007

Restoration Ecology

166

176

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“…Artisanal and small-scale Large-scale Chemically, remnant substrates and tailings typically have lower nutrient levels, including organic C (dos Santos et al, 2013;Eludoyin et al, 2017;Román-Dañobeytia et al, 2015), total N (Mulligan et al, 2006;Sheoran et al, 2010) and available P, Ca 2+ , K + , Mg 2+ , and Na + (Eludoyin et al, 2017). With lower cation exchange capacity than nearby forest and agricultural lands (Eludoyin et al, 2017;Orlekowsky et al, 2013), these substrates often do not hold onto essential nutrients in plant-available forms.…”

Section: Challenges To Restorationmentioning

confidence: 99%

Tropical surface gold mining: A review of ecological impacts and restoration strategies

et al. 2022

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Surface gold mining severely degrades landscapes, causing deforestation, soil erosion and displacement, and toxic contamination. The prevalence of both large-scale and artisanal, small-scale surface gold mining in the tropics has risen over recent decades.Restoration strategies developed for less-severe forms of degradation may not sufficiently address the unique ecological conditions of former gold mines. In this review, we summarize biophysical challenges to the restoration and reforestation of largeand small-scale gold mines in the tropics and synthesize the findings of studies that test restoration strategies at these sites. Certain practices, such as the backfilling of mined pits, topsoil conservation, and the preservation of local seed sources, emerge from the literature as crucial for the timely and effective restoration of gold mines.However, because the severity of ecological degradation varies greatly within and between individual mines, and given the relatively small number (n = 42) of published tropical field studies found in our literature review, we highlight a clear need for continued research and development of restoration strategies specific to ecological conditions of former gold mines in the tropics.

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“…Outra questão fundamental para a revegetação é a escolha de espécies, que deve ser feita em função de clima, solo, condições de drenagem e condições bióticas (SAWATSKY et al, 1996). Da mesma forma, o monitoramento pós-revegetação foi feito na barragem de rejeitos de ouro da mina Kidston, Austrália, com vistas a garantir os objetivos do fechamento (MULLIGAN et al, 2006). A reabilitação ocorreu com a plantação de mudas de espécies nativas, fertilização e irrigação nos quatro primeiros meses, mas identificou-se a geração excessiva de poeira.…”

Section: Questões Geoquímicas Dos Rejeitosunclassified

O que significa descaracterizar barragens de rejeitos de mineração? Uma revisão sistemática da literatura

Massignan

Sánchez

2022

Eng. Sanit. Ambient.

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RESUMO Nova legislação que determina a descaracterização de barragens de rejeitos de mineração motivou esta revisão de métodos e técnicas de descaracterização e seus impactos ambientais. Foram identificados 105 artigos, publicados desde 1983, que descrevem soluções ou discutem desafios ao fechamento de barragens, quanto à estabilidade geotécnica e geoquímica, revegetação ou reutilização dos rejeitos, usualmente almejando a integração segura da barragem ao entorno. Apenas seis artigos abordam impactos ambientais das obras de descaracterização — como aumento do tráfego rodoviário —– e riscos associados à fitorremediação — particularmente a transferência de metais à cadeia alimentar. O assunto é pouco explorado na literatura internacional. Não há entendimento compartilhado sobre o significado de descaracterização, fechamento e termos relacionados. A experiência brasileira que resultará do atendimento à legislação, se devidamente analisada e documentada, contribuirá para o avanço do conhecimento e das técnicas de fechamento de barragens de rejeito.

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An Assessment of the Direct Revegetation Strategy on the Tailings Storage Facility at Kidston Gold Mine, North Queensland, Australia

Cited by 12 publications

References 0 publications

Restoring a Jarrah Forest Understorey Vegetation after Bauxite Mining in Western Australia

Restoring a Jarrah Forest Understorey Vegetation after Bauxite Mining in Western Australia

Tropical surface gold mining: A review of ecological impacts and restoration strategies

O que significa descaracterizar barragens de rejeitos de mineração? Uma revisão sistemática da literatura

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