[中国三江源地区河岸带植物群落空间分布特征及驱动因素识别]。

Q2 Environmental Science
Zhi-Yong Zhang, Hui Liu, Fang-Yong Dong, Xi Zou, Jian-Yong Li, Bin Zhu, Feng Chen, Pei-Ming Ma, Xian-Fu Zhao, Zhi-Wei Zheng, Hai-Bin Tang
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引用次数: 0

摘要

三江源地区独特的地理和气候条件孕育了独特的植物物种和植被类型。为揭示三江源地区河岸带植物群落和土壤生境的空间分布及其影响机制,共设置了14个调查小区(长江源10个、澜沧江源2个、黄河源2个),定量分析了土壤养分特征(特别是土壤磷形态)、气候因子和河流地形对植物群落特征的影响。结果表明,三条河流源头河岸地带的植物群落组成以多年生草本植物为主(72.2%),其次为一年生草本植物(20.4%)和灌木(7.4%)。其次是一年生草本植物(20.4%)和灌木(7.4%)。优势植物为紫茎、蓼、薹草、箭毒草和龙胆草。平均植物覆盖率、香农-维纳指数和皮鲁指数分别为(64.4% ± 23.6%)、(1.31 ± 0.42)和(0.84 ± 0.08)。植物群落多样性指数以长江源最高,澜沧江源次之,黄河源最低。长江源河岸带土壤 pH 值明显高于澜沧江源,而有机质、全氮和铁铝合磷的平均含量则明显低于澜沧江源。钙镁合磷是河岸土壤中磷的主要存在形式(63.89%)。温度、土壤有机磷含量和pH值对三江源河岸带植物组成有显著影响,而土壤钙镁复合磷含量对植物群落多样性有显著影响。这些结果可加深对三江源地区河岸带植物群落演化趋势和遗传机制的科学认识。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
[Spatial Distribution Characteristics of Plant Community and the Identification of Driving Factors in Riparian Zone of the Three-River Headwaters Region, China].

The unique geographical and climatic conditions in the Three-River Headwaters Region gave birth to distinctive plant species and vegetation types. To reveal the spatial distribution of plant communities and soil habitats along the riparian zone of the Sanjiangyuan Region and their influencing mechanisms, 14 survey plots were set up (ten from the Yangtze River source, two from the Lancang River source, and two from the Yellow River source), and the effects of soil nutrient characteristics (especially soil phosphorus morphology), climate factors, and river topography on plant community characteristics were quantitatively analyzed. The results showed that the plant community composition in the riparian zone of the source of the three rivers was dominated by perennial herbs (72.2%), followed by annual herbs (20.4%) and shrubs (7.4%). The dominant plants were Stipa purpurea, Polygonum orbiculatum, Carex parvula, Potentilla anserina, and Gentiana straminea. The average plant coverage, Shannon-Wiener index, and Pielou index were (64.4% ±23.6%), (1.31 ±0.42), and (0.84 ±0.08), respectively. The plant community diversity index was the highest in the Yangtze River source, followed by that in the Lancang River source, and the lowest in the Yellow River source. The soil pH of the riparian zone of the Yangtze River source was significantly higher than that of the Lancang River source, whereas the mean contents of organic matter, total nitrogen, and Fe-Al combined phosphorus were significantly lower than those of the Lancang River source. The calcium and magnesium-combined phosphorus was the main form of phosphorus in riparian soil (63.89%). Temperature, soil organic phosphorus content, and pH had significant effects on plant composition in the riparian zone of the Three-River Headwaters Region, whereas soil calcium and magnesium-combined phosphorus content had significant effects on plant community diversities. These results may deepen the scientific understanding of the evolution trend and genetic mechanism of plant communities in the riparian zone of the Three-River Headwaters Region.

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环境科学
环境科学 Environmental Science-Environmental Science (all)
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4.40
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