Actinomycorrhizal alder technology development for the rehabilitation of disturbed ecosystems in the oil sands industry of Alberta

艾伯塔省的沥青提炼活动产生了大量营养剥离、高度碱化和碱化的尾矿砂，其中含有一些植物毒性碳氢化合物(环烷酸)。这些底物的物理化学特性，再加上北艾伯塔省的环境条件和产生的大量尾矿量，使残渣的可持续管理变得非常复杂。据估计，在过去的30年里，油砂开采产生了超过3x108立方米的尾矿。与固氮菌(Frankia spp.)、外生菌根真菌和真菌形成四方共生关系的放线菌赤杨，已被证明能在这些恶劣的条件下茁壮成长，因此在恢复和恢复这些受干扰的生态系统方面显示出巨大的潜力。该项目旨在改进一项可持续运行的技术，并完成其向工业的转移。我们最近的通讯和即将出版的出版物支持拟议的植物技术。在我们研究势头的基础上，我们建议将菌根成分添加到放线木中。预计这将进一步改善具有挑战性的地点上的杉木开发，使这些地点能够重新植被和恢复。我们还将通过研究2年生的植物来表征在沙地尾矿场上长期建立的赤杨。这个项目利用了先驱赤杨中放线菌共生的自然能力。这项技术正在为管理具有挑战性的残留物的新方法铺平道路，证实了我们在油砂行业的工业合作伙伴的兴趣。

Bitumen extraction activities in Alberta produces large volumes of nutrient-stripped, highly sodic and alkaline tailing sands containing some phytotoxic hydrocarbons (naphthenic acids). The physico-chemical characteristics of these substrates compounded by environmental conditions of Northern Alberta and the sheer volume of tailings produced, greatly complicate the sustainable management of the residues. It is estimated that over the last 30 years, oil sands extraction has produced over 3 x 108 m3 of tailings. Actinomycorhizal alders that enter a tetrapartite symbiosis with the nitrogen-fixing bacteria (Frankia spp.), ectomycorrhizal and aburscular fungi, have been shown to thrive in these harsh conditions and therefore show great potential to revegetate and rehabilitate these disturbed ecosystems.  This project aims to improve a working sustainable technology and to complete its transfer to industry. Our recent communications and upcoming publications support the proposed phytotechnology. Building on the momentum of our research, we propose to add the mycorrhizal component to actinorhizal alders. This is strongly expected to further improve alder development on challenging sites, allowing the revegetation and rehabilitation of such sites. We will also characterize the longer-term establishement of alders on sand tailingsites by studying 2-year-old plants.  This project exploits the naturally-occurring capabilities of the actinomycorrizal symbiosis in the pioneer alders. The technology is paving the way to new approaches in the management of challenging residues, confirmed the interest of our industrial partners in the oil sands industry.