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

阿尔伯塔省的沥青开采活动产生了大量营养剥夺，高钠和碱性尾矿砂，其中含有一些植物毒性碳氢化合物（环烷酸）。这些基质的物理化学特性，加上北阿尔伯塔省的环境条件和所产生的大量尾矿，使残留物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3 × 108立方米的尾矿。放线菌根桤木与固氮细菌（Frankia spp.）、外生菌根真菌和无根真菌进入四栖共生关系，已被证明在这些恶劣条件下茁壮成长，因此显示出巨大的潜力，可以重新种植和恢复这些受干扰的生态系统。该项目旨在改进一项有效的可持续技术，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。基于我们研究的势头，我们建议将菌根成分添加到放线根桤木中。人们强烈期望这将进一步改善具有挑战性地点的桤木开发，允许这些地点的植被恢复和恢复。我们还将通过研究2岁的植物来描述桤木在砂尾矿场地的长期建立。该项目利用了先锋桤木中放线菌共生的自然发生能力。该技术为具有挑战性的残留物管理开辟了新途径，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.