山西黎城野生萱草群落优势种种间关系与生态位  

Interspecific relationships and niches of dominant species in the wild Hemerocallis spp.community in Licheng County,Shanxi,China

作　　者：李志娟 李素清[2] Li Zhijuan;Li Suqing(Gardening Research Institute,Shanxi Agricultural University,Taiyuan 030031,China;Institute of Loess Plateau,Shanxi University,Taiyuan 030006,China)

机构地区：[1]山西农业大学园艺学院,山西太原030031 [2]山西大学黄土高原研究所,山西太原030006

出　　处：《山西农业大学学报（自然科学版）》2021年第5期79-89,共11页Journal of Shanxi Agricultural University(Natural Science Edition)

基　　金：国家自然科学青年科技基金项目(32002085);国家自然科学基金项目(41271531)。

摘　　要：[目的]揭示野生萱草(Hemerocallis spp.)群落优势种的种间相互作用。[方法]本研究采用M.Gordon稳定性、种间关联与相关、生态位测定等方法,对山西黎城野生萱草群落14个优势种、91个种对的种间关系与生态位进行研究。[结果](1)分布于该县西北部海拔1070~1530 m的野生萱草群落14个优势种总体呈显著负关联,群落结构不稳定;(2)91个种对的χ^(2)检验、Pearson相关和Spearman秩相关系数检验正负关联比(分别为0.60,0.26和0.32)均小于1,且80%以上的优势种对间关联不显著,说明多数种间关系不紧密,但建群种黄花菜与北萱草种之间呈极显著负相关;(3)14个优势种划分为以夜晚开花的黄花菜(Hemerocalliscitrina)和白天开花的北萱草(H.esculenta)为建群种的2个生态种组,黄花菜生态位宽度值大于北萱草,二者的生态位宽度较大,但生态位重叠值(0.028)和生态位相似性(0.047)较低;种间负相关越强,其生态位重叠值越小,反之亦然。[结论]黎城野生黄花菜的生态适应能力比北萱草强,应加强该2种野生萱草种质资源的科学保护,在未来引种种植中,二者适宜单种。[Objective]The present study was designed to reveal the interspecific interaction of dominant species and their potential as the useful resource of the wild Hemerocallis spp.[Methods]In this study,the interspecific relationships and niches among 91 species-pairs from 14 dominant species of the wild Hemerocallis spp.community in Licheng County,Shanxi,were analyzed using the methods of M.Gordon stability,interspecific association and correlation,and the niche breadth and overlap.[Results](1)The 14 dominant species in the wild Hemerocallis spp.community distributed at an altitude of 1070-1530 m in the northwest of the Licheng County showed a significant negative correlation(P<0.01)overall,and the community structure was unstable;(2)The positive and negative correlation ratios of theχ^(2)-test,Pearson correlation,and Spearman rank correlation coefficient tests of 91 species-pairs were 0.60,0.26,and 0.32,respectively,and more than 80%of the dominant species-pairs had no significant correlations,indicating that most of the species were not closely related,but the constructive species-pair of H.citrina and H.esculenta was extremely closely related(P<0.01);(3)The 14 dominant species were fallen into two ecological species groups with night-flowering H.citrina and day-flowering H.esculentaas as the constructive species,respectively.The niche width of H.citrina was greater than that of H.esculenta,and their niche overlap(0.028)and similarity(0.047)were low;The stronger the negative correlation between species-pair,the smaller value of the niche overlap and vice versa.Therefore,the ecological adaptability of the wild H.citrina was stronger than that of H.esculenta in Licheng County.[Conclusion]The scientific protection of these two wild species germplasm resources should be strengthened,and they are suitable for mono-planting in the future breeding and planting application practice.

关 键 词：野生萱草 优势种 种间关系 生态种组 生态位 

分 类 号：S682.19[农业科学—观赏园艺]