|本期目录/Table of Contents|

[1]万媛媛,李洪远,贺梦璇,等.基于不同铺装条件下的生境片断化对城市绿地中臭椿幼苗自然更新的影响[J].应用与环境生物学报,2017,23(06):1110-1116.[doi:10.3724/SP.J.1145.2016.12010]
 WAN Yuanyuan,LI Hongyuan**,HE Mengxuan & ZHAO Na.Influences of habitat fragmentation on natural regeneration of Ailanthus altissima in urban greenland based on different pavement conditions[J].Chinese Journal of Applied & Environmental Biology,2017,23(06):1110-1116.[doi:10.3724/SP.J.1145.2016.12010]
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基于不同铺装条件下的生境片断化对城市绿地中臭椿幼苗自然更新的影响()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
23卷
期数:
2017年06期
页码:
1110-1116
栏目:
研究论文
出版日期:
2017-12-25

文章信息/Info

Title:
Influences of habitat fragmentation on natural regeneration of Ailanthus altissima in urban greenland based on different pavement conditions
作者:
万媛媛 李洪远 贺梦璇 赵娜
南开大学环境科学与工程学院 天津 300350
Author(s):
WAN Yuanyuan LI Hongyuan** HE Mengxuan & ZHAO Na
College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
关键词:
生境片断化城市绿地臭椿幼苗种群径级结构自然更新铺装
Keywords:
habitat fragmentation urban greenland Ailanthus altissima seedling population size population natural regeneration pavement
分类号:
Q948.123
DOI:
10.3724/SP.J.1145.2016.12010
摘要:
城市绿地受人工干扰形成的生境片断化造成植物种群隔离,影响环境质量以及植物种群的扩散、迁移和生物多样性. 基于不同铺装条件造成的臭椿更新苗生境片断化调查数据,采用种群径级结构代替年龄结构、空间核密度估计、空间自相关Moran’s I指数分析等方法研究臭椿更新苗的种群结构和空间分布. 结果显示:一侧铺装类型地径级范围最大,最大地径在[9 mm,10 mm](D9级)范围内,最大值为9.86 mm;无铺装影响的非片断化样地更新苗多集中在低径级;紧贴母树范围内更新苗更新较差,距母树3-6 m范围内更新现象明显;铺装样地幼苗更新距离明显大于无铺装样地. 在自相关关系计算中发现,距离母树越近,空间自相关越明显,Ⅱ、Ⅲ类样地在1-2尺度级上均表现为正相关;大距离尺度上更新苗呈现空间负相关,距离尺度越大,更新苗分离趋势越明显,且空间自相关系数不大. 上述结果表明生境片断化对母树周围更新苗数量变化有较显著影响,可根据片断化影响下种群不同的更新距离及分离趋势进行有效的人工保护及利用. (图5 表1 参24)
Abstract:
The fragmentation of urban greening caused by artificial disturbance causes the isolation of plant population, thus, seriously influencing the environmental quality, dispersal, migration, and biodiversity of the plant population. In order to study how the habitat fragmentation caused by urban pavement affects the species’ structure and natural regeneration, population structure, and spatial distribution of regenerating saplings were examined using the method of substitution of size structure for age structure, the estimate of spatial kernel density, and the Index of Moran’s I. We concluded that diameter range of one side paved reaches the maximum diameter structure level [9 mm, 10 mm] (D9 diameter structure level), and the maximum value is 9.86 mm; there were more regenerating saplings concentrated at young age levels in unpaved plots; regenerating saplings gathered obviously within the range of 3–6 m around a mother tree; selectively artificial thinning could be considered, which was conducive to seedling population’s growth and survival. Paved plots’ seedling regenerating distances were greater than those for unpaved plots. The calculation of autocorrelation relationships revealed that seedlings’ spatial autocorrelation relationships were more obvious when closer to the mother tree. Paved plots’ seedlings including Type II and Type III showed a positive correlation when the level of spatial distance scales was at 1–2 classes. Seedlings with large distance scales always had negative correlation relationships and low spatial autocorrelation coefficient values, which were always not significant. A large distance scale around saplings showed more obvious seedling separation trends. The results showed that habitat fragmentation had a significant effect on seedlings’ obvious changes around the mother tree; effective protection and utilization could be used according to different update distances and separation trends during the fragmentation of urban greening.

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更新日期/Last Update: 2017-12-25