中国南方典型喀斯特流域毛竹(Phyllostachys edulis (Carrière) J. Houz.)向邻近人工林扩展过程中土壤代谢物谱的动态变化

IF 4.8 2区 农林科学 Q1 SOIL SCIENCE
Lin Ai , Yuxin Dai , Feng Chen , Jiaojiao Zhang , Jiangming Ma , Kundong Bai , Zhangqi Yang , Hao Yang
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引用次数: 0

摘要

毛竹(Phyllostachys edulis (Carrière) J. Houz.)具有强大的克隆和繁殖能力,使其能够向邻近森林群落扩展。然而,以往关于毛竹扩张的研究主要集中在原始森林,而关于其对人工林,尤其是邻近针叶林的影响的研究仍然有限。因此,本研究调查了毛竹扩展到马松(Pinus massoniana Lamb.)人工林对土壤代谢物的影响。该研究采用非靶向代谢组学方法,在典型喀斯特流域不同坡向和坡位下进行研究,并探讨了土壤代谢物与环境因子的关系。毛竹扩张主要影响了土壤中甘油磷脂的代谢和黄酮类化合物的生物合成。土壤代谢物的α多样性随坡度的增加而增加(p <0.05)。然而,不同坡度之间土壤代谢物的差异并不明显。土壤有机质、全磷和土壤微生物群落组成对土壤代谢物的影响显著(p < 0.05)。结构方程模型表明存在这两种潜在的影响途径;坡度位置和方向通过土壤性质(包括 pH 值(37.6%)、OM 值(49.3%)、Ca 值(14.4%)、HN 值(10.1%)和 TP 值(10.4%))以及微生物群落(包括观察物种(19.3%)、Chao1(12.3%)、ACE(12.1%)和香农指数(20.3%))共同影响土壤代谢。此外,坡位和坡向直接影响土壤性质,进而通过观测物种(70.6%)、Chao1(59.9%)、ACE(57.9%)和香农指数(52.5%)对土壤微生物群落的调节作用影响土壤代谢。因此,我们建议,评估不同坡位和坡向下土壤代谢物的快速反应,以及它们与土壤环境指标的联系,可能有助于深入了解毛竹扩张对生态的影响。我们的研究结果为了解毛竹覆盖动态如何影响典型岩溶流域的土壤代谢物提供了宝贵的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Dynamic changes of soil metabolite profiles during Moso bamboo (Phyllostachys edulis (Carrière) J. Houz.) expansion into adjacent planted forests in a typical karst river basin, South China

Dynamic changes of soil metabolite profiles during Moso bamboo (Phyllostachys edulis (Carrière) J. Houz.) expansion into adjacent planted forests in a typical karst river basin, South China
Moso bamboo (Phyllostachys edulis (Carrière) J. Houz.) exhibits robust cloning and propagation capabilities, enabling its expansion into adjacent forest communities. However, previous studies on Moso bamboo expansion have predominantly focused on virgin forests, and studies on its effects on planted forests, particularly adjacent coniferous forests, remain limited. Therefore, this study investigated the effect of Moso bamboo expansion into planted forests of Masson pine (Pinus massoniana Lamb.) on soil metabolites. The study was conducted using untargeted metabolomics under different slope directions and positions in a typical karst river basin, and the relationships with soil metabolites and environmental factors were delineated. Moso bamboo expansion primarily affected glycerophospholipid metabolism and flavonoid biosynthesis in the soil. The alpha diversity of soil metabolites increased with the slope position (p < 0.05). However, no significant difference in soil metabolites was observed between different slopes. The effects of soil organic matter, total phosphorus, and soil microbial community composition on soil metabolites were significant (p < 0.05). Structural equation modeling suggested the existence of these two potential pathways of influence; the slope position and direction jointly affected soil metabolism through soil properties including pH (37.6 %), OM (49.3 %), Ca (14.4 %), HN (10.1 %), and TP (10.4 %), and microbial communities by Observed Species (19.3 %), Chao1 (12.3 %), ACE (12.1 %), and Shannon indices (20.3 %). Furthermore, the influence of slope positions and directions directly affected soil properties, subsequently affecting soil metabolism through the mediation of soil microbial communities by Observed Species (70.6 %), Chao1 (59.9 %), ACE (57.9 %), and Shannon indices (52.5 %). Therefore, we propose that assessing the rapid response on soil metabolites under varying slope positions and directions, along with their connection to soil environmental indicators, may provide insight into the ecological implications of Moso bamboo expansion. Our findings provide valuable insights for understanding how Moso bamboo cover dynamics affect soil metabolites in a typical karst river basin.
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来源期刊
Applied Soil Ecology
Applied Soil Ecology 农林科学-土壤科学
CiteScore
9.70
自引率
4.20%
发文量
363
审稿时长
5.3 months
期刊介绍: Applied Soil Ecology addresses the role of soil organisms and their interactions in relation to: sustainability and productivity, nutrient cycling and other soil processes, the maintenance of soil functions, the impact of human activities on soil ecosystems and bio(techno)logical control of soil-inhabiting pests, diseases and weeds.
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