Changes of Diversity Gradient of Woody Plants Populations in Urban Riparian Forests of Beijing

被引：0
|
作者：
Niu S. [1 ]
Qiu E. [1 ]
Zhang Z. [1 ]
Xi L. [1 ]
机构：
[1] Research Institute of Forestry, CAFKey Laboratory of Tree Breeding and Cultivation, State Forestry and Glassland Administration Urban Forest Research Center, State Forestry and Glassland Administration, Beijing
来源：
Linye Kexue/Scientia Silvae Sinicae | 2020年 / 56卷 / 11期
关键词：
Arbor-shrub ratio; Beijing; Diversity; Population; Rban riparian forest;
D O I：
10.11707/j.1001-7488.20201121
中图分类号：
学科分类号：
摘要：
Objective: Objective: This paper aims to study the diversity of urban riparian forests in Beijing and explore the regularity of gradient changes in the diversity of plant populations in order to provide a basis for the construction of close-to-nature riparian plant community. Method: Urban rivers of different scales within the sixth ring road of Beijing were divided into 337 river segments through field investigation. 575 transects in size of 400 m2were set up to investigate the species names and quantity of arbors and shrubs. Statistical analyses were carried out to compare the changes of diversity of urban riparian forests among different ring roads, different scales of rivers and different hardening-degree river banks. Result: there are 119 species, 75 genera, 40 families of urban riparian forest in Beijing, including 82 species, 49 genera, 31 families of arbors and 37 species, 28 genera, 14 families of shrubs; the Margelf index of urban riparian arbors was ranked as 5th-6th ring road>2nd-3rd ring road>within 2nd ring road>3rd-4th ring road>4th-5th ring road, while the Margelf index of shrubs was ranked as 2nd-3rd ring road>5th-6th ring road>4th-5th ring road>within 2nd ring road>3rd-4th ring road; the Shannon Wiener indices of urban riparian forest in different river gradients presents first-grade river>third-grade river>second-grade river, while the Shannon-Wiener index of shrub displayed opposite orders. 4)the Magnelf index, the Shannon-Wiener index and the Pielou index of close-to-nature river bank are the largest among banks with different hardening gradients, while the diversity index (except evenness index) of shrub in the vertical dam bank isthe largest. Conclusion: The level of diversity of urban riparian forest in Beijing is generally low. With the increase of the distance from the city center, it shows a trend of increase-decrease-increase, which is consistent with the change trend of undergrowth shrubs. The trend of arbor-bush diversity of riparian forest in different river grades is different, and the arbor species diversity level is generally higher than that of shrubs. The overall level of tree diversity is higher than that of shrub. The arbor species diversity index is higher in close-to-nature river bank, while the undergrowth shrub diversity index is lower. We should make more use of the reasonable plant community structure of typical vegetation of arbor and shrub to improve the diversity level of urban riparian forest in Beijing. © 2020, Editorial Department of Scientia Silvae Sinicae. All right reserved.
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页码：198 / 206
页数：8
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