Ecological Effects of Species Diversity on Plant Growth and Physico-Chemical Properties in a Pb-Zn Mine Tailings

被引：0
|
作者：
Yang S.-X. [1 ,2 ]
Cao J.-B. [3 ]
Li F.-M. [2 ]
Peng X.-Z. [2 ]
机构：
[1] College of Resources and Environment, Zunyi Normal University, Zunyi
[2] College of Biology and Environmental Sciences, Jishou University, Jishou
[3] Ecology and Environment Bureau of Xiangxi Tujiazu & Miaozu Autonomous Prefecture, Jishou
来源：
Huanjing Kexue/Environmental Science | 2021年 / 42卷 / 08期
关键词：
Ecological effects; Heavy metal; Mine tailings; Phytoremediation; Species diversity;
D O I：
10.13227/j.hjkx.202012230
中图分类号：
学科分类号：
摘要：
The remediation of metalliferous mine tailings remains a challenge in many regions of the world. A field experiment was conducted on representative Pb-Zn mine tailings with different species richness (1-, 4-, 8-, and 16-species) to evaluate the potential roles of species diversity in the phytoremediation of metalliferous mine tailings. The main results were ① high species diversity greatly enhanced vegetation cover and biomass. For example, the average vegetation cover and biomass were 33.4% and 66.7 g•m-2 in 1-species plots and reached 78.4% and 183.8 g•m-2 in 16-species plots, respectively. ② Plant species diversity had significant effects on nutrient accumulation. Total organic carbon (TOC), water organic carbon (SOC), total nitrogen (TN) and total phosphorus (TP) significantly increased with the species diversity (TOC: r=0.30,P<0.001; SOC: r=0.20,P<0.05; TN: r=0.24,P<0.05; TP: r=0.20,P<0.05). ③ Species diversity not only reduced the concentration of diethylenetriamine pentaacetate (DTPA)-extracted metals in the mine tailings, but also decreased heavy metal transfer and accumulation in the soil-plant system. With enhanced species diversity, DTPA-extracted Cd, Cu, Pb, and Zn decreased significantly (DTPA-Cd: r=0.20,P<0.05; DTPA-Cu: r=0.19, P<0.05; DTPA-Pb: r=0.23, P<0.05; DTPA-Zn: r=0.23, P<0.05). With increasing species diversity, a slightly decreasing trend was observed for Cd, Cu, Pb, and Zn concentrations in the aboveground parts of plants (Cd: r=-0.16, P<0.01; Cu: r=-0.23, P<0.001; Pb: r=-0.15, P<0.05; Zn: r=-0.18, P<0.001). In conclusion, plant diversity can play an important role in mine reclamation. © 2021, Science Press. All right reserved.
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页码：3953 / 3962
页数：9
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共 45 条
  • [1] Karaca O, Cameselle C, Reddy K R., Mine tailing disposal sites: contamination problems, remedial options and phytocaps for sustainable remediation, Reviews in Environmental Science and Bio/Technology, 17, pp. 205-228, (2018)
  • [2] Liu K H, Zhang H C, Liu Y F, Et al., Investigation of plant species and their heavy metal accumulation in manganese mine tailings in Pingle Mn mine, China, Environmental Science and Pollution Research, 27, 16, pp. 19933-19945, (2020)
  • [3] Wang P, Sun Z H, Hu Y N, Et al., Leaching of heavy metals from abandoned mine tailings brought by precipitation and the associated environmental impact, Science of the Total Environment, 695, (2019)
  • [4] Luo Z T, Tang C B, Hao Y H, Et al., Solidification/stabilization of heavy metals and its efficiency in lead-zinc tailings using different chemical agents, Environmental Technology, (2020)
  • [5] Wang L, Ji B, Hu Y H, Et al., A review on in situ phytoremediation of mine tailings, Chemosphere, 184, pp. 594-600, (2017)
  • [6] Gastauer M, Caldeira C F, Ramos S J, Et al., Active rehabilitation of Amazonian sand mines converges soils, plant communities and environmental status to their predisturbance levels, Land Degradation & Development, 31, 5, pp. 607-618, (2020)
  • [7] Midgley G F., Biodiversity and ecosystem function, Science, 335, 6065, pp. 174-175, (2012)
  • [8] Li Q, Zhu J H, Xiao W F., Relationships and trade-offs between, and management of biodiversity and ecosystem services, Acta Ecologica Sinica, 39, 8, pp. 2655-2666, (2019)
  • [9] Odenbaugh J., Biodiversity, ecosystem functioning, and the environmentalist agenda, Biology & Philosophy, 35, (2020)
  • [10] Yang X, Tan J Q, Sun K H, Et al., Experimental demonstration of the importance of keystone communities for maintaining metacommunity biodiversity and ecosystem functioning, Oecologia, 193, 2, pp. 437-447, (2020)
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