
生物多样性 ›› 2026, Vol. 34 ›› Issue (7): 26146. DOI: 10.17520/biods.2026146 cstr: 32101.14.biods.2026146
巩中军1,*(
)(
), 李为争2, 姚永生3, 左旭琦4, 武予清1, 苗进1,*(
)
收稿日期:2026-04-21
接受日期:2026-06-21
出版日期:2026-07-20
发布日期:2026-09-21
通讯作者:
巩中军,苗进
基金资助:
Zhongjun Gong1,*(
)(
), Weizheng Li2, Yongsheng Yao3, Xuqi Zuo4, Yuqing Wu1, Jin Miao1,*(
)
Received:2026-04-21
Accepted:2026-06-21
Online:2026-07-20
Published:2026-09-21
Contact:
Zhongjun Gong, Jin Miao
Supported by:摘要:
环境DNA宏条形码技术为土壤节肢动物多样性评估提供了新手段。土壤节肢动物eDNA可存在于土壤固相、液相和气相中, 但不同相态中的eDNA是否对应不同生态位或行为类型的物种类群, 尚不清楚。本研究以8种作物田土壤为对象, 分别采用土壤直接提取法(direct soil extraction, SOL, 代表固相)、空气滤膜法(air filtration, AIR, 代表气相)和土壤水过滤法(water filtration, WAT, 代表液相)提取3种相态的eDNA, 结合高通量测序技术分析节肢动物群落组成, 旨在揭示土壤节肢动物eDNA在固、液、气三相中的分布特征。结果表明, WAT的物种丰富度显著高于SOL和AIR (P < 0.05), 而SOL与AIR间无显著差异; 3种方法的β多样性存在极显著差异。置换多元方差分析(permutational multivariate analysis of variance, PERMANOVA)表明, 3种采样方法下土壤节肢动物群落结构具有极显著差异(R2 = 0.2816, P = 0.001), 采样方法可解释群落组成28.16%的变异。主坐标分析(principal coordinates analysis, PCoA)进一步显示, 3种方法的样本在空间上明显分离, 各自聚集为不同的类群。SOL捕获的操作分类单元(operational taxonomic unit, OTU)数量最为丰富(3,314个), 高于AIR (1,023个)和WAT (871个)。在科水平上, SOL检出的等节跳虫科等土壤底栖类群的相对丰度较高, 但各处理间差异不显著(P > 0.05); WAT中摇蚊科相对丰度最高; AIR对金龟科等类群的检出效率更有优势。天敌类群中, 隐翅虫科和舞虻科在3种方法中均有检出。网络分析显示, SOL与AIR、SOL与WAT的比较呈相似模式, SOL节点周围聚集大量OTU簇; 而AIR与WAT的比较中, 高丰度OTU多为方法特异性。等级发生曲线分析表明, SOL检测到的OTU数量最多(169个), 分布最均匀; WAT居中(113个); AIR最少(83个), 以少数优势OTU为主。本研究明确了eDNA在土壤固相、液相、气相中的分布与节肢动物生态位和行为类型密切相关, 呈现明显的分布异质性。SOL对土壤底栖类群及多种天敌类群的检出效果稳定且覆盖广泛; AIR在双翅目、金龟科等类群的检出上更具优势; WAT则对摇蚊科等湿生类群的富集特征尤为明显。针对农田土壤生物多样性评估, 建议以SOL为基础。若研究重点为双翅目或鞘翅目等特定类群, 可在SOL基础上补充AIR; 若研究涉及摇蚊科等偏好湿生环境的类群, 则需加入WAT。本研究为理解eDNA在土壤生态系统中的空间分布特征及农田土壤动物多样性监测方法筛选与组合优化提供了科学依据。
巩中军, 李为争, 姚永生, 左旭琦, 武予清, 苗进 (2026) 农田土壤节肢动物eDNA在固-液-气三相中的分布特征. 生物多样性, 34, 26146. DOI: 10.17520/biods.2026146.
Zhongjun Gong, Weizheng Li, Yongsheng Yao, Xuqi Zuo, Yuqing Wu, Jin Miao (2026) Distribution characteristics of arthropod eDNA in the solid, liquid, and gas phases of farmland soil. Biodiversity Science, 34, 26146. DOI: 10.17520/biods.2026146.
图1 不同方法下土壤节肢动物群落α多样性。SOL: 土壤直接提取法; AIR: 空气滤膜法; WAT: 土壤水过滤法。不同小写字母表示方法间差异显著(P < 0.05)。
Fig. 1 Alpha diversity of soil arthropod communities under different extraction methods. SOL, Direct soil extraction; AIR, Air filtration; WAT, Soil water filtration. Different lowercase letters indicate significant differences among extraction methods (P < 0.05).
图2 基于3种eDNA提取方法的土壤节肢动物群落结构主坐标分析。每个散点代表1个独立样本, 上方与右侧的箱线图分别展示了各组样本在PC1、PC2轴上的分布差异, 不同小写字母(a/b/c)表示组间差异显著。SOL: 土壤直接提取法; AIR: 空气滤膜法; WAT: 土壤水过滤法。
Fig. 2 Principal coordinates analysis (PCoA) of soil arthropod community structure based on three eDNA extraction methods. Each dot represents an individual sample. The boxplots above and to the right show the distribution of samples along PC1 and PC2, respectively. Different lowercase letters (a/b/c) indicate significant differences among groups. SOL, Direct soil extraction; AIR, Air filtration; WAT, Soil water filtration.
图3 3种eDNA提取方法下土壤节肢动物群落目(A)和科(B)水平优势类群相对丰度。SOL: 土壤直接提取法; AIR: 空气滤膜法; WAT: 土壤水过滤法。
Fig. 3 Relative abundance of dominant soil arthropod taxa at the order (A) and family (B) level under three eDNA extraction methods. SOL, Direct soil extraction; AIR, Air filtration; WAT, Soil water filtration.
图4 3种土壤eDNA提取方法下目(A)和科(B)水平节肢动物群落类群相对丰度间的差异。不同小写字母表示组间存在显著差异(Tukey’s HSD检验, P < 0.05)。SOL: 土壤直接提取法; AIR: 空气滤膜法; WAT: 土壤水过滤法。
Fig. 4 Intergroup differences in relative abundance of arthropod taxa at order (A) and family (B) level under three soil eDNA extraction methods. Different lowercase letters denote significant differences (Tukey’s HSD test, P < 0.05). SOL, Direct soil extraction; AIR, Air filtration; WAT, Soil water filtration.
图5 3种土壤eDNA提取方法共有和特有OTU分布UpSet图。左侧柱状图表示各方法检测到的OTU总数; 右侧点阵图展示方法间的交集组合, 点阵图顶部的深蓝色柱状图对应各交集组合的OTU数量, 数字标注了各交集的具体OTU值。SOL: 土壤直接提取法; AIR: 空气滤膜法; WAT: 土壤水过滤法。
Fig. 5 UpSet plot showing shared and unique OTU among three soil eDNA extraction methods. Left bar chart shows the total OTU detected by each method. The bottom dot matrix indicates intersection combinations among methods, with dark blue bars above showing the corresponding intersection sizes; numbers indicate exact OTU counts for each intersection. SOL, Direct soil extraction; AIR, Air filtration; WAT, Soil water filtration.
图6 基于网络分析的OTU组成相似性及3种方法间独特性比较。网络中心的彩色圆形节点代表3种eDNA提取方法。SOL: 土壤直接提取法; AIR: 空气滤膜法; WAT: 土壤水过滤法。
Fig. 6 Network analysis comparing shared and unique OTU among three eDNA extraction methods. The colored circular nodes at the network center represent three eDNA extraction methods. SOL, Direct soil extraction; AIR, Air filtration; WAT, Soil water filtration.
图7 不同土壤eDNA提取方法OTU等级-出现频率曲线。SOL: 土壤直接提取法; AIR: 空气滤膜法; WAT: 土壤水过滤法。
Fig. 7 Rank occurrence frequency curves of OTU detected by different soil eDNA extraction methods. SOL, Direct soil extraction; AIR, Air filtration; WAT, Soil water filtration.
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