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出露石牙对珍稀濒危植物四药门花分布与叶表型性状的影响
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引用本文:俞筱押,杨光琴,丁智强,余瑞,潘成臣.出露石牙对珍稀濒危植物四药门花分布与叶表型性状的影响[J].中国岩溶,2020,(3):352-358. YU Xiaoya,YANG Guangqin,DING Zhiqiang,YU Rui,PAN Chengchen.Effects of exposed stone teeth on the distribution and leaf phenotypic variation of the endangered plant Loropetalum subcordatum in Maolan National Nature Reserve[J].Carsologica Sinica,2020,(3):352-358.
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俞筱押 黔南民族师范学院旅游与资源环境学院贵州 都匀 558000/贵州省黔南景区溶洞旅游资源开发与生态环境保护工程研究中心贵州 都匀 558000 
杨光琴 黔南民族师范学院旅游与资源环境学院贵州 都匀 558000/贵州省黔南景区溶洞旅游资源开发与生态环境保护工程研究中心贵州 都匀 558000 
丁智强 云南师范大学旅游与地理科学学院昆明 650500 
余瑞 贵州省都匀市第三中学贵州 都匀 558000 
潘成臣 中国科学院西北生态环境资源研究院兰州 730000 
基金项目:贵州省科技厅学术新苗计划(黔科合平台人才[2019]QNSYXM-08);贵州省教育厅工程中心项目黔教合KY字[2017]025
中文摘要:喀斯特区常见的出露石牙对水分和养分的再分配影响了植物物种的分布与适应特征。为了解出露石牙对中国特有珍稀濒危植物四药门花(Loropetalum subcordatum)的分布与叶表型性状的影响,用样带法对贵州茂兰国家自然保护区内四药门花个体根部和周边最近石牙与土表连接处的距离进行调查、并选择距石牙不同距离的乔木植株叶片进行表型特征测量。根据四药门花植株的分布特征,将其与石牙距离分为三组(0 cm、0.1~10 cm、≥10 cm)进行分析。结果表明:①本次共调查到四药门花个体515株,其中胸径≥1 cm的388株(75.3%)。胸径最大值为17.5 cm,该植株距石牙7 cm。胸径≥1 cm植株距石牙0 cm、0.1~10 cm、≥10 cm植株数分别为89株平均胸径3.44±2.26 cm、21株平均胸径4.38±4.55 cm和278株平均胸径3.93±2.75 cm;幼苗和幼树距离石牙0 cm有19株、0.1~10 cm有62株、≥10 cm有46株。②茂兰四药门花种群叶长106.60±19.28 mm、叶宽47.53±10.10 mm、叶宽/长0.45±0.08、叶厚0.32±0.05 mm、叶柄长12.82±3.35 mm、叶柄径1.43±0.35 mm。距石牙0 cm组、0.1~10 cm组和≥10 cm组四药门花的叶长、叶宽、叶柄径差异不显著(P>0.05),叶厚、叶宽/叶长、叶柄长差异极显著(P<0.01)。石牙出露深刻影响了四药门花的分布和植物的适应特征。
中文关键词:叶表型性状  空间分布  异质性  岩溶  石牙  四药门花  珍稀濒危植物
 
Effects of exposed stone teeth on the distribution and leaf phenotypic variation of the endangered plant Loropetalum subcordatum in Maolan National Nature Reserve
Abstract:The heterogeneous habitat plays an important role in conservation and restoration of rare and endangered plants. In karst areas, the common exposed stone teeth can cause the differentiation of soil physical and chemical properties, thus affecting the distribution and adaptation characteristics of rare and endangered plant populations. To examine the distribution and adaptation characteristics of endangered plants in heterogeneous habitat, we investigated the leaf phenotypic variation and the distance between plant and stone teeth of Loropetalum subcordatum population by the transect method in the Maolan National Nature Reserve, Libo county, China. We divided the distance into three groups (0 cm, 0.1-10 cm, and above 10 cm) for analysis. The results show that, (1) among 515 individual of Loropetalum subcordatum investigated, 388 pieces (75.3%) have DBH≥1 cm. The maximum DBH is 17.5 cm, and the distance between it and the stone teeth is 7 cm. In the 0 cm distance group, there are 89 DBH≥1 cm individuals with average 3.44±2.26 cm, and seedlings and saplings are present in 19 individuals. In the 0-10 cm distance group, 21 pieces have DBH≥1cm with average 4.38±4.55 cm, and seedlings and saplings are 62 individuals. In the above 10 cm distance group, there were 278 DBH≥1cm individuals with average 3.93±2.75 cm, and seedlings and saplings are 46 individuals. (2) The length of Loropetalum subcordatum population’s leaf is 106.60±19.28 mm, and the width is 47.53±10.10 mm, the ratio of width to length is 0.45±0.08, the thickness is 0.32±0.05 mm, respectively. The petiole length of Loropetalum subcordatum population is 12.82±3.35 mm and diameter is 1.43±0.35 mm, respectively. There are no significant differences in the length, width, and petiole diameter of Loropetalum subcordatum leaf in the distance groups 0 cm, 0.1-10 cm and ≥10 cm, but the leaf thickness, petiole length and leaf width/length are significantly different(P<0.01). On the whole, the stone teeth has a profound influence on the distribution and leaf characteristics of Loropetalum subcordatum.
keywords:leaf phenotypic,spatial distribution,heterogeneous habitat,karst
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