燕山和太行山过渡区植物多样性垂直变化特点  

Vertical Characteristics of Plant Diversity in Transition Between Mount. Yan and Mount. Taihang

作　　者：丛明旸 曹迪[2] 陈国平[3] 陈宝政[4] 孙丰宾[4] 

机构地区：[1]河北科技师范学院生命科技学院,秦皇岛066600 [2]黑龙江八一农垦大学生命科学技术学院,大庆163319 [3]南开大学生命科学学院,天津300071 [4]黑龙江八一农垦大学农学院,大庆163319

出　　处：《植物研究》2017年第5期673-681,共9页Bulletin of Botanical Research

基　　金：学成;引进人才科研启动金(XYB2016-01);国家自然青年基金(31400444);黑龙江省教育厅(201410223022)~~

摘　　要：为明确山脉过渡区森林群落的建群种,以及验证植物多样性是否符合"中间高度膨胀"理论,沿天津最高峰聚仙峰设置海拔样带,分析得出:(1)乔木、灌木和草本层优势种垂直变化规律不同。乔木层物种组成具有变化规律,研究区下部是槲栎和栓皮栎,随海拔升高核桃楸占优势并混生油松,然后蒙古栎占优势地位,至山顶发展为紫椴和蒙古栎混交林,槲栎和栓皮栎为伴生种,可见栎属植物不仅在各海拔段均有分布,而且优势地位显著,是该区群落的建群种;灌木层以小花溲疏为各海拔段绝对优势种;草本层优势种无规律。(2)α多样性指数具有垂直变化规律。物种多样性S在600~700 m(中低海拔)最高;Simpson指数在800~900 m(中高海拔)最高,群落信息量和复杂度达到最大值;Shannon-Wiener和Pielou指数均为双峰格局,数值在700~800 m(中海拔)低于两侧。因此,燕山和太行山脉过渡区聚仙峰的物种多样性不支持"中间高度膨胀"理论。研究结果和结论丰富了山脉过渡区生态学理论,也提供了北方山地植物多样性信息。We clarified forest constructive species in transition area, and put ‘Intermediate expansion hypothesis＇ to the test. We took the highest peak Juxianfeng in Tianjin of China as study site,and set transect sampling along elevation vertically. The results were as follows：（ 1） Change rules of dominant species in every layer differed from each other. In tree layer,dominant species in lower area were Quercus aliena and Q.variabilis. Increasing with altitude, Juglans mandshurica gradually became dominant, mixed with Pinus tabuliformis. Q. mongolica played an important role in community. Until top of the mountain,the plant communities were Tilia amurensis-Q. mongolica mixed forests. However,Q. aliena and Q. variabilis became companion species at the same time. Quercus distributed everywhere and were keystone species in this transition area. Deutzia parviflora was absolute dominant species in shrub layer within all altitude. Dominant species in herb layer showed disordered.（ 2） α diversity indexes changed vertically. Total species richness S reached the maximum in 600-700 m. The peak of Simpson index appeared in 800-900 m which was in middle high altitude,suggesting more information and complexity. Shannon-Wiener and Pielou indexes showed the same lawthat was bimodal pattern,namely numerical value in 700-800 m was lower than both two sides. Therefore,our results didn＇t support ‘Intermediate expansion hypothesis＇ in transition area. Our study enriched the ecology theory in mountain transition region,and provided plant diversity information of the north mountain in China.

关 键 词：过渡区 植被 重要值 物种多样性 海拔梯度 

分 类 号：Q145.2[生物学—生态学]