Biodiversity Science ›› 2018, Vol. 26 ›› Issue (10): 1127-1132.doi: 10.17520/biods.2018081

• Original Papers • Previous Article    

The response of diverse soil fauna communities to elevated CO2 concentrations in Sanjiang Plain

Yining Wu1, 2, He Wang1, Haixiu Zhong2, Nan Xu2, Jinbo Li2, Jifeng Wang2, Hongwei Ni2, *(), Hongfei Zou1, *()   

  1. 1 College of Wildlife Resources, Northeast Forestry University, Harbin 150040
    2 Institute of Natural Resources and Ecology, Heilongjiang Academy of Sciences, Harbin 150040
  • Received:2018-03-19 Accepted:2018-06-13 Online:2019-01-06
  • Ni Hongwei,Zou Hongfei;
  • About author:# Co-first authors

The effect of elevated atmospheric CO2 concentrations was investigated on soil fauna communities, controlling the concentrations at 370, 550 and 700 ppm in open top chambers in Sanjiang Plain. Samples were taken and separated by Tullgren or Baermann funnel methods in autumn 2017. Our results showed that: (1) 6,268 individuals belonging to seven classes and 15 orders were collected. Oribatida was the dominant group, accounting for 88.13% of the total individuals. Collembola and Diptera larvae were the other most common groups, accounting for 9% in total, respectively. Different groups varied in their responses to elevated CO2 concentrations. Oribatida was the dominant group. Collembola and Diptera larvae were the most common groups in AC, EC1 and EC2, but rare groups also differed in AC, EC1 and EC2. (2) The elevated CO2 concentration significantly increased the density of Oribatida, but reduced the density of Collembola. However, no other soil fauna were significantly affected. (3) The Shannon-Wiener index and the Pielou index of soil fauna exhibited the order of AC > EC1 > EC2, the Simpson index showed the order of EC2 > EC1 > AC, and the Margalef index showed the order of AC > EC2 > EC1. Our results indicate that the soil fauna community composition and diversity might be affected by climate change.

Key words: Sanjiang Plain, soil fauna, elevated CO2 concentration, biodiversity

Table 1

Soil fauna communities and densities (ind./m2) under different CO2 concentration. AC, 370 ppm CO2; EC1, 550 ppm CO2; EC2, 700 ppm CO2."

密度 Density 优势度
密度 Density 优势度
密度 Density 优势度
7.98% ++ 5.63% ++ 2.53% ++
甲螨亚目 Oribatida 82.32% +++ 86.00% +++ 92.88% +++
双翅目幼虫 Diptera larvae 6.63% ++ 4.81% ++ 2.28% ++
0.06% + 0.16% + 0.14% +
0.68% + 0.55% + 0.25% +
0.49% + 0.27% + 0.11% +
0.49% + 0.38% + 0.21% +
0.06% + - - - -
0.06% + - - 0.04% +
中气门亚目 Mesostigmata 0.80% + 0.33% + 0.11% +
0.06% + 0.33% + 0.14% +
0.06% + 0.16% + 0.18% +
线虫 Nemata 0.06% + 0.16% + 0.78% +
Coleptera imago
0.18% + 0.60% + 0.28% +
0.06% + 0.05% + 0.04% +
- - - - 0.04% +
Diptera imago
- - 0.55% + - -

Fig. 1

Effect of CO2 concentration on soil fauna communities in Sanjiang Plain. AC, 370 ppm CO2; EC1, 550 ppm CO2; EC2, 700 ppm CO2. Different lowercase letters indicate significant difference in density or group richness among treatments (P < 0.05)."

Fig. 2

Diversity indices of soil fauna communities under different CO2 concentration in Sanjiang Plain. AC, 370 ppm CO2; EC1, 550 ppm CO2; EC2, 700 ppm CO2. Different lowercase letters indicate significant difference in diversity indices among treatments (P < 0.05)."

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