生物多样性 ›› 2026, Vol. 34 ›› Issue (7): 26146.  DOI: 10.17520/biods.2026146  cstr: 32101.14.biods.2026146

• 土壤生物多样性专题 • 上一篇    下一篇

农田土壤节肢动物eDNA在固-液-气三相中的分布特征

巩中军1,*()(), 李为争2, 姚永生3, 左旭琦4, 武予清1, 苗进1,*()   

  1. 1 河南省农业有害生物监测与防控重点实验室, 农业农村部华北南部有害生物综合治理重点实验室, 河南省农业科学院植物保护研究所, 郑州 450002
    2 河南农业大学植物保护学院, 郑州 450002
    3 塔里木大学农学院, 新疆阿拉尔 843300
    4 河南云飞科技发展有限公司, 郑州 450003
  • 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:
    国家重点研发计划(2024YFD1400802);河南省农业科学院基本科研业务费专项(2026ZC69);河南省自然科学基金(242301420138);河南省自然科学基金(232301420114);河南省农业科学院科技创新团队专项(2024TD18)

Distribution characteristics of arthropod eDNA in the solid, liquid, and gas phases of farmland soil

Zhongjun Gong1,*()(), Weizheng Li2, Yongsheng Yao3, Xuqi Zuo4, Yuqing Wu1, Jin Miao1,*()   

  1. 1 Henan Key Laboratory of Agricultural Pest Monitoring and Control / Key Laboratory of Integrated Crop Pests Management on Crops in Southern Region of North China, Ministry of Agriculture and Rural Affairs / Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
    2 College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
    3 College of Agriculture, Tarim University, Aral, Xinjiang 843300, China
    4 Henan Yunfei Technology Development Co., Ltd, Zhengzhou 450003, China
  • Received:2026-04-21 Accepted:2026-06-21 Online:2026-07-20 Published:2026-09-21
  • Contact: Zhongjun Gong, Jin Miao
  • Supported by:
    National Key Research and Development Program of China(2024YFD1400802);Basal Research Funds of Henan Academy of Agricultural Sciences(2026ZC69);Natural Science Foundation of Henan(242301420138);Natural Science Foundation of Henan(232301420114);Science and Technology Innovation Team Project of the Henan Academy of Agricultural Sciences(2024TD18)

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。

关键词: 环境DNA, 土壤节肢动物, 农田生态系统, 生物多样性监测, DNA宏条形码技术

Abstract

Aims: Environmental DNA (eDNA) metabarcoding technology offers a novel approach for assessing soil arthropod diversity. This study aimed to compare the performance of three eDNA sampling methods for detecting soil arthropods.
Methods: Soil samples were collected from eight crop fields. Three eDNA sampling methods were employed: direct soil extraction (SOL), air filtration (AIR), and soil water filtration (WAT). Arthropod community composition was analyzed using high-throughput sequencing.
Results: Species richness was significantly higher in WAT than in SOL and AIR (P < 0.05), with no significant difference between SOL and AIR. The three methods also differed considerably in beta diversity. Permutational multivariate analysis of variance (PERMANOVA) revealed highly significant differences in soil arthropod community structures among the three sampling methods (R2 = 0.2816, P = 0.001), indicating that the sampling method explained 28.16% of the total variation in community composition. Principal coordinates analysis (PCoA) further showed that samples from the three methods formed three distinct clusters along the ordination plot. SOL detected the highest number of operational taxonomic unit (OTUs; 3,314), followed by AIR (1,023) and WAT (871). At the family level, the relative abundance of soil-dwelling groups such as Isotomidae detected by the SOL was higher, but the differences among treatments were not significant (P > 0.05). WAT exhibited the highest relative abundance of Chironomidae and AIR demonstrated superior detection efficiency for Scarabaeidae. Among natural enemy groups, Staphylinidae and Empididae were detected by all three methods. Network analysis revealed dense OTU clusters around SOL nodes in SOL-AIR and SOL-WAT comparisons, while in the AIR-WAT comparison, high-abundance OTUs were largely method-specific. Rank occurrence curves indicated that SOL detected the most OTUs (169) and showed the most even distribution, followed by WAT (113) and AIR (83), with AIR dominated by a few abundant OTUs.
Conclusion: The distribution of eDNA in the solid, liquid, and gas phases of soil is closely related to the ecological niche and behavioral types of arthropods, exhibiting heterogeneous distribution. SOL offers stable and broad-spectrum detection of soil-dwelling groups and various natural enemy taxa. AIR shows advantages in detecting groups such as Diptera and Scarabaeidae. WAT is particularly effective in enriching taxa like Chironomidae that prefer moist environments. For biodiversity assessment of farmland soil, the SOL is recommended as the foundation. If the focus is on specific taxa such as Diptera or Coleoptera, the AIR can be added as a supplement to SOL. If the study involves taxa that prefer moist environments, such as Chironomidae, the WAT should be additionally incorporated. This study provides a scientific basis for understanding the spatial distribution of eDNA in soil ecosystems and for the optimizing methods for monitoring soil arthropod diversity in agricultural fields.

Key words: environmental DNA, soil arthropods, agroecosystem, biodiversity monitoring, DNA metabarcoding