王皓, 梁钰, 周利杰, 王斌, 魏来. 极小种群黄花绿绒蒿点格局分析[J]. 北京师范大学学报(自然科学版), 2023, 59(4): 637-643. DOI: 10.12202/j.0476-0301.2023116
引用本文: 王皓, 梁钰, 周利杰, 王斌, 魏来. 极小种群黄花绿绒蒿点格局分析[J]. 北京师范大学学报(自然科学版), 2023, 59(4): 637-643. DOI: 10.12202/j.0476-0301.2023116
WANG Hao, LIANG Yu, ZHOU Lijie, WANG Bin, WEI Lai. Point pattern analysis of extremely small populations of Meconopsis georgei[J]. Journal of Beijing Normal University(Natural Science), 2023, 59(4): 637-643. DOI: 10.12202/j.0476-0301.2023116
Citation: WANG Hao, LIANG Yu, ZHOU Lijie, WANG Bin, WEI Lai. Point pattern analysis of extremely small populations of Meconopsis georgei[J]. Journal of Beijing Normal University(Natural Science), 2023, 59(4): 637-643. DOI: 10.12202/j.0476-0301.2023116

极小种群黄花绿绒蒿点格局分析

Point pattern analysis of extremely small populations of Meconopsis georgei

  • 摘要: 为了研究极小种群物种黄花绿绒蒿的分布格局,从而为黄花绿绒蒿的保护制定针对性策略,在目前已知黄花绿绒蒿唯一分布区内设置了3块样方,记录了样方内所有黄花绿绒蒿个体,通过单样本与双变量统计函数对随机标签模型进行了点格局分析.研究结果显示:在小尺度上,黄花绿绒蒿呈现出明显的聚集分布;而在中大尺度上,这种聚集有所减弱.造成黄花绿绒蒿在小尺度上聚集的主要原因是扩散限制,而生境过滤在中大尺度上同样影响着黄花绿绒蒿的空间分布.双变量点格局分析表明,黄花绿绒蒿的幼年个体聚集程度最高,此后因为种内竞争加剧,导致成年个体更接近随机分布,因此,在黄花绿绒蒿的保护过程中,确保成年植株顺利散播种子并提高种子的扩散能力尤为重要,在保护黄花绿绒蒿物种的同时,也应注意对其所处生境的保护.

     

    Abstract: Understanding the spatial patterns of species distributions and underlying mechanisms is important to characterize population dynamics and to provide insights for conservation management. To study the distribution pattern of the extremely small population species Meconopsis georgei, and to develop targeted strategies for the conservation of this species, a spatial point pattern analysis was done in the only known distribution area of Meconopsis georgei. Within this area, three sample plots were set up, all individuals within the sample plots were recorded, with juveniles (non-flowering individuals) and adults (flowering individuals) distinguished. Data showed that on small scales, Meconopsis georgei showed a clear aggregated distribution, while on medium and large scales, this aggregation was diminished. The main reason for aggregation at small scales was dispersal limitation, while habitat filtering was found to also affect the spatial distribution at medium and large scales. Bivariate point pattern analysis suggested that the highest aggregation of juvenile individuals was observed in Meconopsis georgei, while increased intraspecific competition led to a closer random distribution of adult individuals. The above data suggest that for the conservation of Meconopsis georgei, it is particularly important to ensure successful seed dispersal by adult plants and to improve seed dispersal ability, conservation of the species should be accompanied by protection of habitat.

     

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