Dynamic changes of spatial pattern and structure of the <i>Tamarix ramosissima</i> population at the desert-oasis ecotone of the Tarim Basin

Jiapeng, 康佳鹏 Kang; Yingying, 马盈盈 Ma; Shuqin, 马淑琴 Ma; Zhengwei, 薛正伟 Xue; Lili, 杨丽丽 Yang; Lu, 韩路 Han; Weiyang, 柳维扬 Liu

doi:10.5846/stxb201711262112

Cited by 2 publications

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“…As scale increases and intraspecific exclusion is enhanced, populations experience a greater tendency to randomize ( Liu, 2021 ). Stronger self-thinning within P. euphratica populations, which limits seedling establishment and growth and reduces population renewal, can also cause a transition from an aggregated to a random distribution ( Kang et al., 2019 ).…”

Section: Discussionmentioning

confidence: 99%

The spatial pattern of Populus euphratica competition based on competitive exclusion theory

Liu,

Zeng,

Wang

et al. 2024

Front. Plant Sci.

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IntroductionPopulation-level competition and spatial patterns may explain the role of competitive exclusion in communities, which is important for vegetation restoration and biodiversity conservation.MethodsWe analyzed the competitive intensity, spatial patterns, and renewal of Populus euphratica Oliv. forests in the Tarim River Basin using the Hegyi competition index and spatial point pattern analysis in a completely random model with different habitats and different forest ages. ResultsThe greatest competitive distance for P. euphratica was 10 m, and the intensity of competition steadily decreased as the diameter increased. The intensity of intraspecific and interspecific competition in young, mature, and old P. euphratica forests was as follows: riverside habitat > transitional habitat > desert margin habitat. The Simpson index values for the three habitats decreased as follows: transitional > riverside > desert margin, and the Shannon-Wiener index and Pielou index values decreased as follows: riverside > transitional > desert margin. In the riverside habitat, the young P. euphratica forest experienced the greatest competitive intensity, the mature forest in the transitional habitat was the largest, and the forest in the desert margin habitat was the oldest. Competitive intensity was greatest in the young riverside P. euphratica forest, mature P. euphratica forest in the transitional habitat, and old forest in the desert margin. Riverside P. euphratica experienced strong competition from Populus pruinosa. Competitive exclusion caused P. pruinosa to disappear from the transitional and desert margin habitats. Young, mature, and old P. euphratica forests were randomly distributed along the riverside and in the transitional habitat, while mature and old P. euphratica forests were randomly distributed in the desert margin. Populus pruinosa, Tamarix ramosissima, and Tamarix hispida were mainly randomly distributed, and T. ramosissima and T. hispida were clustered at small scales. In the riverside habitat, young, mature, and old P. euphratica had no spatial correlation, and there was a significant negative correlation at small scales in the transitional habitat. The density of P. euphratica seedlings in the riverside habitat was greater than that in the transitional habitat, and greater competitive pressures on P. euphratica tree seedlings caused a lower renewal density.ConclusionsWhen planting P. euphratica forests, spacing greater than 10 m can effectively reduce stand competition and thus promote seedling regeneration.

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Section: Discussionmentioning

confidence: 99%

The spatial pattern of Populus euphratica competition based on competitive exclusion theory

Liu,

Zeng,

Wang

et al. 2024

Front. Plant Sci.

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“…Tamarix Chinensis Lour. is an excellent tree species for windbreak and sand fixation and salt-alkali matrix [19][20][21]. In coastal saline-alkali land in Dongying, Tamarix Chinensis Lour.…”

Section: Saline Alkali Land Management In the Yellow River Basinmentioning

confidence: 99%

Analysis of the Ecological Value of Pioneer Plants in the Yellow River Basin

Jing,

Jingqi,

Yongqing

et al. 2024

AJAHR

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Pioneer plants are plant species that appear early in the community succession or show strong adaptability, which can improve the local ecological environment and create conditions for the succession and recovery of other plants and animals. After analyzing the general situation in the Yellow River Basin, this paper explores the main ecological values of pioneer plants, such as treatment of salt-alkali land, soil and water conservation, improvement of soil quality, community succession and biodiversity promotion. Also, typical cases of pioneer plants used for treatment and restoration in ecologically fragile areas such as Shanxi-Shaanxi-Inner Mongolia Pisha sandstone area, coastal saline-alkali land, abandoned mine pits in Yellow River Basin are introduced and analyzed to provide a theoretical basis for further embodying the ecological function of pioneer plants in the Yellow River Basin.

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Dynamic changes of spatial pattern and structure of the Tamarix ramosissima population at the desert-oasis ecotone of the Tarim Basin

Cited by 2 publications

References 0 publications

The spatial pattern of Populus euphratica competition based on competitive exclusion theory

The spatial pattern of Populus euphratica competition based on competitive exclusion theory

Analysis of the Ecological Value of Pioneer Plants in the Yellow River Basin

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