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油砂开采后重构土壤对白杨及其相关地下微生物组的影响。

The impact of reconstructed soils following oil sands exploitation on aspen and its associated belowground microbiome.

机构信息

Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, Québec, G1V4C7, Canada.

Agriculture and Agri-Food Canada, Ottawa, K1A 0C6, Canada.

出版信息

Sci Rep. 2018 Feb 9;8(1):2761. doi: 10.1038/s41598-018-20783-6.

DOI:10.1038/s41598-018-20783-6
PMID:29426844
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5807544/
Abstract

The objective of this study was to investigate the impact of different soil covers used to reclaim decommissioned oil sands mining sites on the genetic diversity of aspen and their associated belowground microbiota. Aspen genotyping showed that trees mostly originated from sexual reproduction on sites reclaimed with soil covers made of upland forest floor-mineral mix (FFMM) and lowland peat-mineral mix (PMM). In contrast, most individuals in mature and burned stands sampled as benchmarks for natural disturbances originated from vegetative reproduction. Nonetheless, aspen populations in the FFMM and PMM sites were not genetically different from those in mature and burned stands. DNA metabarcoding of bacteria and fungi in root and soil samples revealed that the diversity of the belowground microbiota associated with aspen and the relative abundance of putative symbiotic taxa in PMM were significantly lower than for FFMM and naturally disturbed sites. Despite similar aspen genetic diversity between FFMM and PMM sites, trees were not associated with the same belowground microbiota. Because the soil microbiome and more specifically the mycorrhizal communities are variable both in space and time, long-term monitoring is particularly important to better understand the ecological trajectory of these novel ecosystems.

摘要

本研究旨在探讨用于复垦废弃油砂矿的不同土壤覆盖物对白杨及其相关地下微生物群落遗传多样性的影响。白杨基因型分析表明，在采用高地森林地表-矿物混合（FFMM）和低地泥炭-矿物混合（PMM）制成的土壤覆盖物复垦的矿场上，树木主要通过有性繁殖产生。相比之下，作为天然干扰基准样本地成熟和火烧样本地大多数个体则来自营养繁殖。尽管如此，FFMM 和 PMM 样地上的白杨种群与成熟和火烧样地上的种群在遗传上没有差异。根和土壤样本的细菌和真菌 DNA 宏条形码分析表明，与白杨相关的地下微生物群落的多样性以及 PMM 中假定共生类群的相对丰度明显低于 FFMM 和自然干扰样地。尽管 FFMM 和 PMM 样地上的白杨遗传多样性相似，但树木与相同的地下微生物群落没有关联。由于土壤微生物组，特别是菌根群落，在空间和时间上都具有变异性，因此长期监测对于更好地了解这些新生态系统的生态轨迹尤为重要。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4ff/5807544/3eb1f175178b/41598_2018_20783_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4ff/5807544/c1e9a3d8dc97/41598_2018_20783_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4ff/5807544/d75faade430e/41598_2018_20783_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4ff/5807544/65c8d2a84090/41598_2018_20783_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4ff/5807544/051cefcb7149/41598_2018_20783_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4ff/5807544/3eb1f175178b/41598_2018_20783_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4ff/5807544/c1e9a3d8dc97/41598_2018_20783_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4ff/5807544/d75faade430e/41598_2018_20783_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4ff/5807544/65c8d2a84090/41598_2018_20783_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4ff/5807544/051cefcb7149/41598_2018_20783_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4ff/5807544/3eb1f175178b/41598_2018_20783_Fig5_HTML.jpg

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