干旱区研究

Arid Zone Research >

2023 , Vol. 40 >Issue 8: 1294 - 1303

DOI: https://doi.org/10.13866/j.azr.2023.08.10

Plant Ecology

Syndynamic and diversity of species during gangue treatment in Shuanglong ditch

  • Lide WANG ,
  • Dacheng SONG ,
  • Guangyu LI ,
  • Heran ZHAO ,
  • Kewen ZHENG
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  • 1. Gansu Desert Control Research Institute, Lanzhou 730070, Gansu, China
    2. Gansu Hexi Corridor Forest Ecosystem National Research Station, Wuwei 733000, Gansu, China
    3. Minqin National Station for Desert Steppe Ecosystem Studies, Mingqin 733300, Gansu, China
    4. College of Forestry, Gansu Agricultural University, Lanzhou 730070, Gansu, China
    5. Haxi Town of Tianzhu Tibetan Autonomous County Animal Husbandry and Veterinary Station, Tianzhu 733206, Gansu, China

Received date: 2023-01-09

  Revised date: 2023-03-29

  Online published: 2023-08-24

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Abstract

In order to explore the succession and species diversity of plant communities in the process of gangue treatment, the text used the time-space substitution method to select the different years (2, 5, and 10 a) of gangue treatment in Shuanglong ditch, Tianzhu Tibetan Autonomous County, Gansu Province, and the untreated gangue as the contrast (CK) sample plots. The vegetation was surveyed, and the succession characteristics and species diversity of plant communities were analyzed. The results show that: (1) during the process of Shuanglong ditch gangue treatment, we identified 55 species of plants belonging to 40 genera and 24 families in 4 sample plots. Among these taxa, 15 families were single families, single genus, and single species. There were 28 species of Asteraceae, Poaceae, and Rosaceae, which accounted for 12.5% of the total number of families and 50.91% of the total species. Most of the species belonged to a few families, and most plant species belonged to a single family and a single genus. (2) During the years of gangue treatment, the dominant species of the community gradually changed from annual or perennial herbs to perennial herbs and shrubs. The number of plant species in the CK was 11, and after 5 years of gangue treatment, we identified 28 species, which decreased to 18 species after 10 years of gangue treatment. Finally, Elymus nutans, Poa pratensis, and Hippophae rhamnoides become the dominant species in the sample plot; and these three plants comprised 48.107. (3) With increasing gangue treatment time, the number of species, Shannon diversity index, and Margalef richness index gradually increased from CK to 5 years after gangue treatment, reaching maximum values of 28, 3.506, and 2.877 respectively. The Pielou evenness index changed little, although we observed a trend of “falling-rising-falling.” In contrast, the Simpson dominance index showed a trend of “rising-falling-rising,” reaching the maximum value of 0.359 after 10 years of gangue treatment. (4) The length of time of gangue treatment greatly impacted the quantitative characteristics of the plant population. Plant height significantly increased from CK, 2-10 a (P < 0.05). Coverage significantly increased from CK to 5 a and 10 a of treatment (P < 0.05). The number of plants increased significantly from CK to 10 a of treatment (P < 0.05). Overall, the results indicate that years of gangue treatment greatly impacted vegetation succession and species diversity in the Shuanglong ditch of the eastern section of Qilian Mountains; and the plant community has gradually become single and stable.

Key words： Shuanglong ditch; gangue treatment; syndynamic; importance value; diversity of species

Cite this article

Lide WANG , Dacheng SONG , Guangyu LI , Heran ZHAO , Kewen ZHENG . Syndynamic and diversity of species during gangue treatment in Shuanglong ditch[J]. Arid Zone Research, 2023 , 40(8) : 1294 -1303 . DOI: 10.13866/j.azr.2023.08.10

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