Short-term survival and growth of 32 native boreal plants on treated oil sands tailings

IF 1.3 Q3 AGRONOMY Agrosystems, Geosciences & Environment Pub Date : 2024-10-22 DOI:10.1002/agg2.20577
Dani Degenhardt, Angeline Van Dongen, Çağdaş Kera Yücel, Amanda Schoonmaker
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Abstract

The consolidation of oil sands tailings is a cost- and time-consuming process that requires treatment via active (e.g., centrifugation) and passive (e.g., self-weight consolidation) methods. The use of plants to dewater tailings is a promising concept and has previously been evaluated using agronomic grass species in greenhouse studies. This greenhouse study evaluated the short-term survivorship and growth of 32 upland and lowland native plant species (12 forbs, 14 graminoids, and six woody plants) in centrifuged tailings and benchmarked their performance against reclamation soil and undisturbed forest soil. All plant species were propagated from seed and transplanted as seedlings into containers filled with one of the three substrates. After 42 days, the height (woody species only) and total aboveground biomass were determined for all living plants. As expected, the mortality of seedlings in tailings was higher than plants grown in the other two substrates. Graminoid species, regardless of species community type (wetland or upland), had higher survival probabilities and growth compared to forb or woody species across all substrates. Of forbs and woody species evaluated, Geum aleppicum and Populus tremuloides showed the most promise amongst the upland species, and Rumex occidentalis was the wetland equivalent.

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经处理的油砂尾矿上 32 种北方原生植物的短期存活和生长情况
油砂尾矿固结是一个耗费成本和时间的过程,需要通过主动(如离心)和被动(如自重固结)方法进行处理。使用植物对尾矿进行脱水是一个很有前景的概念,此前已在温室研究中使用农艺草种对其进行了评估。这项温室研究评估了 32 种高地和低地本地植物(12 种草本植物、14 种禾本科植物和 6 种木本植物)在离心尾矿中的短期存活率和生长情况,并将它们的表现与复垦土壤和未受干扰的森林土壤进行比较。所有植物都是用种子繁殖的,幼苗移栽到装有三种基质之一的容器中。42 天后,测定所有活体植物的高度(仅限木本植物)和地上生物量总量。不出所料,尾矿中幼苗的死亡率高于在其他两种基质中生长的植物。在所有基质中,无论物种群落类型(湿地或高地)如何,禾本科物种的存活概率和生长速度均高于草本或木本物种。在所评估的草本和木本物种中,高地物种中的鹅掌楸和杨树最有前途,而湿地物种中的西洋接骨木则与之相当。
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来源期刊
Agrosystems, Geosciences & Environment
Agrosystems, Geosciences & Environment Agricultural and Biological Sciences-Agricultural and Biological Sciences (miscellaneous)
CiteScore
2.60
自引率
0.00%
发文量
80
审稿时长
24 weeks
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