Niche of dominant species in shrub layer of <i>Pinus massoniana</i> secondary forest at the initial stage of forest gap

Chen Shiyou; Jiang Chunqian; Bai Yanfeng; Wang Hui; He Yunhe

doi:10.12171/j.1000-1522.20220084

Journal of Beijing Forestry University > 2023 > 45(7): 27-35. > DOI: 10.12171/j.1000-1522.20220084

Chen Shiyou, Jiang Chunqian, Bai Yanfeng, Wang Hui, He Yunhe. Niche of dominant species in shrub layer of Pinus massoniana secondary forest at the initial stage of forest gap[J]. Journal of Beijing Forestry University, 2023, 45(7): 27-35. DOI: 10.12171/j.1000-1522.20220084

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Niche of dominant species in shrub layer of Pinus massoniana secondary forest at the initial stage of forest gap

1.
Research Institute of Forestry, Chinese Academy of Forestry, Key Laboratory of Tree Breeding and Cultivation,National Forestry and Grassland Administration, Beijing 100091, China
2.
School of Landscape Architecture, Zhenjiang A&F University, Hangzhou 311300, Zhejiang, China

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Received Date: March 01, 2022
Revised Date: June 20, 2022
Available Online: May 28, 2023
Published Date: July 24, 2023

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Abstract

Abstract

Objective In the low-quality and low-efficiency Pinus massoniana secondary forest in Cili County, Hunan Province of central China, the niche characteristics of seedlings under different-sized forest gaps during the early stage of gap phase were analyzed and compared to grasp the niche law of forest gap regeneration, and explore the technology of artificial promotion of natural regeneration.
Method The ecological community survey method was used to investigate the characteristics of forest gap. Niche characteristics of dominant shrub layer species in Pinus massoniana secondary forest during gap vegetation regeneration were analyzed.
Result (1) At the initial stage of gap regeneration, the species and number of plants in the shrub layer in the gap were increased compared with those in the forest. The ranking of important values of dominant tree species in the shrub layer was significantly different. Positive tree species such as Rhus chinensis, Loropetalum chinense, Myrsine africana were ranked higher in the gap. (2) During the early stage, the niche breadth values of the plants in different-sized gaps appeared differentiation. The ecological width of Rhus chinensis, Broussonetia kaempferi, Rubus corchorifolius etc. all showed such a pattern (medium gap > large gap > small gap = the understory). Other plants were not sensitive to the forest gap. (3) The species with niche overlap values (> 0.1) accounted for 85.71%, 92.98%, 44.64 and 12.5% of the species in the large forest gaps (445−480 m²), medium forest gaps (150−180 m²), small forest gaps (68−85 m²) and the understory, respectively.
Conclusion Gap size has a certain effect on plant regeneration, and the niche characteristics of plant seedlings are different under different gap area. In the medium gap (150−180 m²), the ecological overlap of regeneration seedlings in Pinus massoniana secondary forest is large. All species could make relatively balanced and effective use of environmental resources, and the regeneration situation is good and stable, which promotes the natural regeneration of the Pinus massoniana secondary forest. It is beneficial to the conservation of biodiversity and the improvement of forest carbon storage of Pinus massoniana secondary forest.
- niche,
- forest gap,
- Pinus massoniana,
- secondary forest,
- niche overlap

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References

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Niche of dominant species in shrub layer of Pinus massoniana secondary forest at the initial stage of forest gap

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