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作 者:侯智文 张雨晴 钟智聪 贺炯坤 许贞魏 杨允菲[2] 韩大勇 HOU Zhiwen;ZHANG Yuqing;ZHONG Zhicong;HE Jiongkun;XU Zhenwei;YANG Yunfei;HAN Dayong(College of Bioscience and Technology,Yili Normal University,Yining 835000,Xinjiang,China;Institute of Grassland Science,Northeast Normal University,Changchun 130024,China)
机构地区:[1]伊犁师范大学生物科学与技术学院,新疆伊宁835000 [2]东北师范大学草地科学研究所,长春130024
出 处:《自然保护地》2025年第1期97-111,共15页Natural Protected Areas
摘 要:【目的】新疆阿魏(Ferula sinkiangensis)是伊犁地区特有的珍稀濒危植物,野外种群数量极少。对人工恢复条件下新疆阿魏种群的基本数量特征进行研究十分必要。【方法】设置12个5m×5m样地数据,使用一次移动平均法对新疆阿魏种群数量动态进行时间序列预测,运用单因素方差分析和双因素方差分析方法对新疆阿魏自然保护区不同坡向和坡位的种群密度和冠径等数量特征进行分析,并采用点格局法分析其种群空间分布格局。【结果】在保护区内,新疆阿魏总体上在各径级均有分布,以径级0~10.0cm的个体数量最多。种群密度和冠径在不同坡向和坡位间均存在显著的空间分异。种群密度以东坡(7.64±7.62)株/m^(2)、下坡位(4.67±5.25)株/m^(2)最高,冠径以北坡(42.4±20.0)株/m^(2)、下坡位(24.2±19.0)株/m^(2)最高。在空间分布格局上,新疆阿魏在东坡、南坡上大部分样地呈现小尺度聚集(<27cm)、大尺度(≥27cm)随机分布的特征,而西坡、北坡以随机分布为主,即使有聚集,但聚集程度也较低。方差分析结果表明,坡向对新疆阿魏种群密度、冠径和种群聚集规模影响最大,坡位的影响最小,二者的交互效应影响居中。【结论】新疆阿魏种群的生长及其空间分布受坡向和坡位影响显著,在北坡和下坡位更有利于植株生长,可作为新疆阿魏就地人工保护的参考依据。【Objectives】Ferula sinkiangensis is a rare and endangered plant species endemic to the Yili region,with a very small population in the wild.At present,the basic quantitative characteristics of Ferula sinkiangensis population remain unknown.【Methods】Based on the data of 125 m×5 m sample plots,this study predicted the population dynamics of Ferula sinkiangensis by one-time moving average method,analyzed the population density,crown diameter and other quantitative characteristics of Ferula sinkiangensis nature reserve in different slope directions and positions by one-way analysis of variance and two-way analysis of variance,and analyzed its spatial distribution pattern by point pattern method.【Results】Ferula sinkiangensis was distributed across all diameter classes witin the nature reserve,with the greatest number of individuals observed in the 0-10.0 cm diameter class.There were significant spatial differences in population density and crown diameter between different slope directions and slope positions.The population density was the highest in the east slope(7.64±7.62)plants/m^(2) and the downhill position(4.67±5.25)plants/m^(2),and the crown diameter was the highest in the north slope(42.4±20.0)plants/m^(2) and the downhill position(24.2±19.0)plants/m^(2).With regard to the spatial distribution pattern,Ferula sinkiangensis exhibited the characteristics of small-scale aggregation(<27 cm)and large-scale random distribution(≥27 cm)in most plots on the eastern and southern slopes,while the western and northern slopes were mainly randomly distributed,even if there was aggregation,the degree of aggregation was small.The results of variance analysis showed that the slope direction had the greatest influence on the population density,crown diameter and population aggregation scale of Ferula sinkiangensis,while the slope position had the smallest influence,and the interaction effect between them was in the middle.【Conclusions】The growth and the spatial distribution of Ferula sinkiangensis populati
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