Biodiv Sci ›› 2022, Vol. 30 ›› Issue (12): 22269.  DOI: 10.17520/biods.2022269

Special Issue: 土壤生物与土壤健康

• Original Papers • Previous Articles     Next Articles

Latitude distribution and associated environmental factors of soil nematodes in a typical black soil region

Ping Liu1, Hongwen Liu1,2, Miao Zhang1,2, Yan Gao1,2, Mengting Zhang1,2, Aizhen Liang1, Shixiu Zhang1,*()   

  1. 1. Key Laboratory of Black Soils Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102
    2. University of Chinese Academy of Sciences, Beijing 100049
  • Received:2022-05-17 Accepted:2022-10-08 Online:2022-12-20 Published:2023-01-10
  • Contact: *E-mail:


Aims: Northeast black soil is one of the most important agricultural resources in China. Understanding the spatial distribution of nematode communities as well as their influcing factors is of great importance for ensuring food security in China.
Methods: In September 2018, 31 farmland sampling sites were selected across the black soil region within the bounds of 42°50°-49°08° N, and 93 soil samples were collected. Soil nematode communities were identified by morphological identification.
Results: A total of 47 nematode genera (relative abundance > 1%) were identified. Across all samples, the bacterivores nematode Acrobloides was the most abundant (relative abundance > 5%). Species richness and abundance of nematode communities increased with latitude, but only among bacterivores and omnivores/predators nematodes. Soil organic carbon was the most important environmental factor affecting richness and abundance of soil nematodes in a typical black soil region, followed by monthly mean temperature. Soil nematode community structure in this region was divided into two categories: south and north, with a boundary at 47° N separating the two groups. This division was attributed mainly to the differences in the relative abundance of plant parasitic and omnivorous/predatory nematodes between the two areas. Soil pH value and bulk density were the most important factors influencing community structure in the south and north, respectively.
Conclusion: This study clarifies the relationship between environmental factors and nematode community structure, as well the geographical distribution of nematode communities in a typical black soil region. As such, it provides basic data and reference for the mechanism driving the character of soil biota under agricultural interference.

Key words: black soil, nematodes, latitude, driving factors, soil organic carbon