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• W4293899993 abstract "To explore the spatial distribution and intraspecific correlation of Quercus aliena var. acutiserrata, a domi-nant tree species in a 25 hm2 plot of warm temperate deciduous broadleaved forest in Qinling Mountains, the pair-correlation function g(r) was used to study the spatial pattern and intraspecific association. The results showed that the diameter class structure of Q. aliena var. acutiserrata was bimodal, with a large proportion of young trees (1 cm≤DBH＜5 cm), indicating an increase population structure with good capability of regeneration. The abundance of middle trees (15 cm≤DBH＜25 cm) was slightly more than that of big trees (25 cm≤DBH＜35 cm) and old trees (DBH≥35 cm), but far less than that of young trees and small trees. The spatial distribution of Q. aliena var. acuteserrata was obviously altitude dependent, which mainly distributed in the middle and high altitude areas. Results of complete spatial randomness (CSR) model analysis showed that young trees, small trees, adult trees, big trees, and old trees were aggregated in the large scale (＜60 m). Heterogeneous Poisson (HP) model was used to eliminate habitat heterogeneity. The results of HP model showed that the individual aggregation degree of each diameter class decreased, indicating that the distribution was affected by habitat heterogeneity. At the small scale (＜40 m), spatial correlation was positively correlated between individuals with small diameter gap, whereas the spatial correlation was negative correlation and no correlation between individuals with large diameter gap. At large scale (>40 m), the spatial correlation was positively correlated between large-diameter individuals, but negatively correlated and unrelated between saplings and other diameter individuals. Our results indicated that biological cha-racteristics of Q. aliena var. acutiserrata and habitat heterogeneity were important drivers for the formation of population spatial pattern.为探究锐齿槲栎种群的空间分布特征及关联性,本研究以秦岭皇冠暖温性落叶阔叶林25 hm2森林样地内优势树种锐齿槲栎为对象,采用成对相关函数g(r)对其空间格局及其种内关联性进行了研究。结果表明: 锐齿槲栎径级结构呈“双峰”型,幼树(1 cm≤胸径DBH＜5 cm)个体数较多,种群呈增长型结构,更新良好;中树(15 cm≤DBH＜25 cm)比大树(25 cm≤DBH＜35 cm)、老树(DBH≥35 cm)的个体数略多,但远少于幼树和小树(5 cm≤DBH＜15 cm)。锐齿槲栎空间分布具有明显的海拔依赖性,主要分布在中高海拔地区。完全空间随机零模型分析表明,各径级个体在＜60 m的大尺度范围聚集分布。使用异质泊松模型剔除生境异质性分析表明,各径级的个体转变为大尺度的随机分布,表明树种的分布明显受到生境变化的影响。在＜40 m的小尺度范围内,径级差距小的个体间的空间关联性为正关联,径级差距大的个体间的空间关联性转变为负关联和无关联;在＞40 m的大尺度范围内,大径级个体间的空间关联性为正关联,而幼树和其他径级个体间的空间关联性为负关联或无关联。锐齿槲栎自身生物学特性和环境异质性是种群空间格局形成的重要原因。." @default.
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• W4293899993 date "2022-08-01" @default.
• W4293899993 modified "2023-09-26" @default.
• W4293899993 title "[Spatial distribution pattern and intraspecific association of dominant species Quercus aliena var. acu-tiserrata in Qinling Mountains, China]." @default.
• W4293899993 doi "https://doi.org/10.13287/j.1001-9332.202208.002" @default.
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