应用生态学报2024，Vol.35Issue(6)：1534-1542,9.DOI:10.13287/j.1001-9332.202406.007
单叶蔷薇种群结构与结实能力
Population structure and fruiting ability of Rosa persica
摘要
Abstract
We analyzed age structure and dynamics,spatial distribution patterns,and reproductive capabilities of four Rosa persica populations in Xinjiang,to evaluate the survival status of the species and explore the reasons behind its endangerment.The results showed that the populations had fewer individuals in the youngest(Ⅰ)and oldest(Ⅵ-Ⅷ)age classes,with a predominance of middle-aged individuals,resulting in an irregular pyramid-shaped distribution,described as"high in the middle,low on both sides".The populations were generally growing,but were susceptible to external environmental disturbances(Vpi′＞0,Pmax＞0).The mortality rate(qx)and vanish rate(Kx)peaked at age Ⅴ,leading to a sharp decline in plant abundance.The life expectancy(ex)decreased progressively with the increases of age class,reaching its lowest at age Ⅷ,which indicated minimal vitality at this stage.A time sequence analysis predicted a future dominance of individuals at age Ⅴ-Ⅷ,suggesting an aging trend.Spatially,the four populations were predominantly clumped,with the intensity of clumping ranked from high-est to lowest as P4,P3,P1,and P2.P3 and P4 exhibited better reproductive capabilities than P,and P2.There was a significant positive correlation between hundred-fruit weight and plant height and crown width,and between total seed number and crown width and hundred-fruit weight.关键词
单叶蔷薇/年龄结构/空间结构/结实能力/致危机理Key words
Rosa persica/age structure/spatial structure/fruiting capacity/vulnerable mechanism引用本文复制引用
张晓龙,李娜,钟浚锋,张晨洁,于超,张启翔,罗乐..单叶蔷薇种群结构与结实能力[J].应用生态学报,2024,35(6):1534-1542,9.基金项目
本文由国家自然科学基金面上项目(32071820)、国家重点研发计划项目(2019YFD1001001)、中央高校基本科研业务费专项资金项目(QNTD202306)和城乡人居生态环境学项目(北京高校高精尖学科建设项目)资助. （32071820）
