摘要
为探究德夯地质公园林溪交错带草本群落的物种组成及多样性,采用样线调查和样方调查相结合的方式,选取九龙溪、夯峡溪与玉泉溪3条样线共90个样方展开调查。结果显示:1)德夯地质公园林溪交错带共有草本植物51科102属141种,其中菊科植物占比最多,其次是荨麻科、唇形科;2)叶以不裂、纸质、中型、单叶、互生为主要特征,在叶毛被参数上,九龙溪以两面无毛为主,夯峡溪与玉泉溪则以两面有毛为主,叶性状呈现典型亚热带植物功能性状的特点;3)繁殖性状以两性花、腋生和顶生、聚伞花序、瘦果和朔果、风力传播种子为主,花期主要在4—9月,果期主要在7—10月;4)Shannon-Wiener指数、Simpson指数和Pielou指数均呈现出九龙溪最高、夯峡溪次之、玉泉溪最低的规律;5)相异性系数和Cody指数的变化格局一致,二者最小值均在九龙溪与夯峡溪之间,最大值在玉泉溪与九龙溪之间。该研究可为德夯地质公园林溪交错带草本植物资源的保护与合理利用提供理论依据。
In order to study the species composition and diversity of herbaceous communities in the forest-creek ecotone of Hunan Dehang Geopark,ninety quadrats along three distinct transects(including Jiulong Creek,Hangxia Creek,and Yuquan Creek)were selected and investigated for a comprehensive investigation by both transect and quadrat survey methods.The results showed that 1)In the forest-creek ecotone of the Dehang Geopark,there were a total of 141 species belonging to 102 genera and 51 families of herbaceous plants,with the Asteraceae family being the most dominant,followed by Urticaceae and Lamiaceae;2)The herbaceous species in the forest-creek ecotone were characterized by undivided,papery,medium-sized,simple,and alternate leaves.The leaves along Jiulong Creek transect were mostly hairless on both sides,while those along Hangxia Creek and Yuquan Creek transects were with trichomes on both sides.They all possessed the functional traits of typical subtropical plant leaves;3)The herbaceous species had reproductive traits such as dioecious flowers,axillary and terminal inflorescences,cyme,achenes and capsules,and wind-dispersed seeds,with the flowering period mainly from April to September and the fruiting period mainly from July to October;4)All the Shannon-Wiener,Simpson,and Pielou indices showed the highest values along the Jiu-long Creek transect,followed by the Hangxia Creek transect,and then the Yuquan Creek transect;5)Both the dissimilarity coefficient and Cody index displayed a consistent pattern,with the lowest values between the Jiulong Creek and Hangxia Creek transects,and the highest values between the Yuquan Creek and Jiu-long Creek transects.All of these could provide theoretical basis for the conservation and rational utilization of herbaceous resources in Hunan Dehang Geopark.
作者
龙姿羽
王志成
赵蕊
刘冰
王璐
陈功锡
LONG Ziyu;WANG Zhicheng;ZHAO Rui;LIU Bing;WANG Lu;CHEN Gongxi(Key Laboratory of Plant Resources Conservation and Utilization(College of Hunan Province),Jishou University,Jishou 416000,Hunan,China;National and Local United Engineering Laboratory of Integrative Utilization Technology of Eucommia ulmoides,Jishou University,Jishou 416000,Hunan,China)
出处
《生命科学研究》
CAS
2024年第5期409-418,共10页
Life Science Research
基金
吉首市德夯风景区管理处科研项目(19DHK03)。
