| 戴云山南坡不同海拔森林土壤微生物群落结构特征和影响因素 |
| 摘要点击 4397 全文点击 976 投稿时间：2021-08-15 修订日期：2021-10-01 |
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| 中文关键词 土壤微生物群落结构 磷脂脂肪酸(PLFA) 季节 海拔 戴云山 |
| 英文关键词 soil microbial community structure phospholipid fatty acids(PLFA) seasons elevations Daiyun Mountain |
| 作者 | 单位 | E-mail | | 何中声 | 福建农林大学计算机与信息学院, 福州 350002
福建农林大学林学院, 福州 350002
福建农林大学海峡自然保护区研究中心, 福州 350002
生态与资源统计福建省高校重点实验室, 福州 350002 | jxhzs85@fafu.edu.cn | | 王紫薇 | 福建农林大学计算机与信息学院, 福州 350002
福建农林大学海峡自然保护区研究中心, 福州 350002
生态与资源统计福建省高校重点实验室, 福州 350002 | | | 朱静 | 福建农林大学林学院, 福州 350002
福建农林大学海峡自然保护区研究中心, 福州 350002
生态与资源统计福建省高校重点实验室, 福州 350002 | | | 陈佳嘉 | 福建农林大学林学院, 福州 350002
福建农林大学海峡自然保护区研究中心, 福州 350002
生态与资源统计福建省高校重点实验室, 福州 350002 | | | 谷新光 | 福建农林大学林学院, 福州 350002
福建农林大学海峡自然保护区研究中心, 福州 350002
生态与资源统计福建省高校重点实验室, 福州 350002 | | | 江蓝 | 福建农林大学林学院, 福州 350002
福建农林大学海峡自然保护区研究中心, 福州 350002
生态与资源统计福建省高校重点实验室, 福州 350002 | | | 陈博 | 福建农林大学林学院, 福州 350002
福建农林大学海峡自然保护区研究中心, 福州 350002
生态与资源统计福建省高校重点实验室, 福州 350002 | | | 吴则焰 | 福建农林大学生命科学学院, 福州 350002 | | | 刘金福 | 福建农林大学林学院, 福州 350002
福建农林大学海峡自然保护区研究中心, 福州 350002
生态与资源统计福建省高校重点实验室, 福州 350002 | fjljf@fafu.edu.cn | | 陈文伟 | 戴云山国家级自然保护区管理局, 德化 362500 | |
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| 中文摘要 |
| 土壤微生物作为森林生态系统主要驱动力，是影响生态系统物质循环和养分转化的重要因素.探讨不同海拔和季节森林土壤微生物群落的分布规律，对理解土壤生态过程和预测土壤生态系统功能具有重要研究意义.以戴云山南坡不同海拔森林土壤（海拔900~1500 m）为研究对象，探讨夏季和冬季不同海拔土壤微生物群落结构和功能多样性，揭示驱动土壤微生物群落变化的主要因素.结果表明：①夏季土壤微生物群落中革兰氏阳性菌含量最高，冬季土壤真菌含量最高，海拔1200 m处土壤总磷脂脂肪酸含量均高于其它海拔.随海拔升高，冬季土壤微生物群落中土壤真菌群比细菌群占据更大优势.②冗余分析表明，夏季7个海拔土壤微生物群落磷脂脂肪酸（PLFA）含量主要受环境因子和地形因子共同作用，累计解释量达56.72%；冬季土壤微生物群落磷脂脂肪酸含量主要受环境因子驱动，单独解释量达52.23%，环境因子和地形因子累计解释量为55.37%.③土壤全碳含量、土壤pH和多酚氧化酶是驱动夏季土壤微生物群落变化的主要因子；土壤有效磷、全钾、全碳含量和土壤pH是驱动冬季土壤微生物群落变化的主要因子. |
| 英文摘要 |
| Soil microorganisms, as the primary driving force of forest ecosystems, play a vital role in affecting the material cycle and nutrient transformation in ecosystems. It is critical to investigate the distribution of forest soil microbial communities across different elevations and seasons, since this information aids in the understanding of forest soil ecological processes and predicting soil ecosystem functions. Hence, we selected forest soil on the southern slope of Daiyun Mountain (elevation from 900 to 1500 m) as the research object, aiming to explore the soil microbial community structure and functional diversity at different elevations in the summer and winter seasons. Meanwhile, we sought to elucidate the primary factors influencing the variations in soil microbial communities. The results showed that:① the contents of soil gram-positive bacteria, gram-negative bacteria, and fungi at the elevation of 1200 m in the summer season on the southern slope of Daiyun Mountain were significantly higher than those of other elevations; the soil bacterial content reached a maximum at the elevation of 1300 m. The contents of soil gram-positive bacteria and actinomycetes at the elevation of 1000 m in the winter season were higher than those at other elevations. By contrast, the content of soil gram-negative bacteria was the highest at the elevation of 900 m. In the winter season, the soil fungal community had a greater preponderance than that of the bacterial community in the soil microbial community with increasing elevation. ② Redundancy analysis demonstrated that the soil PLFA contents along the seven elevations were jointly affected by environmental factors and topographic factors in the summer season, and the cumulative interpretation was 56.72%. The first axis with positive scores was associated with high total phosphorus content and pH, and negative scores were associated with high slope. The second axis with positive scores was associated with high total potassium content, and negative scores were associated with high soil catalase, polyphenol oxidase, sucrose activity, and total carbon content. In the winter season, the soil PLFA contents were mainly influenced by environmental factors with an independent interpretation of 52.23%, and the cumulative interpretation between the environmental and topographic factors was 55.37%. The first axis with negative scores was correlated with low total phosphorus content, total carbon content, and soil pH. The second axis with positive scores was associated with high total potassium content, and negative scores were associated with high soil polyphenol oxidase, catalase, acid phosphatase activity, and aspect. ③ The soil total carbon, pH, and polyphenol oxidase activity were the main factors driving the variations in the soil microbial community in the summer season, whereas the main factors were the soil available phosphorus, total potassium, total carbon content, and pH in the winter season. |
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