National & Local United Engineering Laboratory for Chinese Herbal Medicine Breeding and Cultivation, Jilin University, Changchun 130012, China; School of Life Sciences, Jilin University, Changchun 130012, China.
School of Life Sciences, Jilin University, Changchun 130012, China.
Sci Total Environ. 2022 Mar 20;813:152615. doi: 10.1016/j.scitotenv.2021.152615. Epub 2021 Dec 25.
Plant encroachment in alpine regions, caused by global changes and human activities, has been well documented. However, our knowledge of the effects of plant encroachment on belowground microbial communities is limited. Here, we investigated soil physicochemical properties and microbial community structures under the impact of plant encroachment along an elevation gradient in the alpine tundra of the Changbai Mountain, China. We found that plant encroachment had insignificant (P > 0.05) and inconsistent effects on the α-diversity (number of observed OTUs, Shannon, Chao1, Faith's PD) of soil microbial communities. Plant encroachment indirectly influenced soil microbial community structures by altering soil physicochemical properties, which differed between elevations and plant types (P < 0.05). In all, 40 bacterial indicator taxa and 57 fungal indicator taxa significantly shifted in response to plant encroachment, some of which were involved in soil biogeochemical cycle. Overall, our results documented the impacts of plant encroachment on soil microbial diversity and community composition, and provided a scientific basis for predicting future changes in alpine ecosystem structure and function and its subsequent feedbacks to global change.
植物入侵是由全球变化和人类活动引起的高山地区的一个严重问题，这已经得到了充分的证明。然而，我们对于植物入侵对地下微生物群落的影响的了解还很有限。在这里，我们研究了中国长白山高山冻原沿海拔梯度受植物入侵影响的土壤理化性质和微生物群落结构。我们发现，植物入侵对土壤微生物群落的 α-多样性（观察到的 OTU 数量、香农多样性指数、Chao1 丰富度、Faith 的 PD 指数）没有显著（P > 0.05）和不一致的影响。植物入侵通过改变土壤理化性质间接影响土壤微生物群落结构，而土壤理化性质在不同海拔和植物类型之间存在差异（P < 0.05）。总的来说，有 40 种细菌指示类群和 57 种真菌指示类群对植物入侵有明显的响应，其中一些与土壤生物地球化学循环有关。总的来说，我们的研究结果记录了植物入侵对土壤微生物多样性和群落组成的影响，并为预测未来高山生态系统结构和功能的变化及其对全球变化的后续反馈提供了科学依据。
