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[1]吴 阳 陈芳清,** 张 淼,陈韶华 刘坤慧 高伊培.香溪河消落带不同恢复模式下植物群落的种子雨及其时空变化特征[J].应用与环境生物学报,2016,22(06):1000-1007.[doi:10.3724/SP.J.1145.2016.02001]
 WU Yang,CHEN Fangqing,**,et al.The seed rain of plant communities under different restoration methods in the drawdown zone of Xiangxi River and their temporal and spatial variations[J].Chinese Journal of Applied & Environmental Biology,2016,22(06):1000-1007.[doi:10.3724/SP.J.1145.2016.02001]
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香溪河消落带不同恢复模式下植物群落的种子雨及其时空变化特征()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
22卷
期数:
2016年06期
页码:
1000-1007
栏目:
“生态系统的格局与恢复”专栏论文
出版日期:
2016-12-25

文章信息/Info

Title:
The seed rain of plant communities under different restoration methods in the drawdown zone of Xiangxi River and their temporal and spatial variations
作者:
吴 阳2 陈芳清1 2** 张 淼1 2 陈韶华2 刘坤慧2 高伊培2
1三峡地区地质灾害与生态环境湖北省协同创新中心 宜昌 443002 2三峡地区生态保护与治理国际合作研究中心 宜昌 443002
Author(s):
WU Yang2 CHEN Fangqing1 2** ZHANG Miao1 2 CHEN Shaohua2 LIU Kunhui2 & GAO Yipei2
1 Collaborative innovation Center for Geo-Hazards and Eco-Environment in Three Gorges Area, Hubei Province, Yichang 443002, China 2 International Research Center for Ecological Protection and Management in the Three Gorges Area, Yichang 443002, China
关键词:
消落带恢复模式种子雨时空变化相似性
Keywords:
drawdown zone restoration method seed rain temporal and spatial dynamics similarity
分类号:
Q948.15
DOI:
10.3724/SP.J.1145.2016.02001
摘要:
种子雨在一定程度上决定了植物群落的更新潜能和演变趋势. 采用种子雨萌发实验,研究香溪河消落带人工和自然恢复模式下消落带种子雨物种组成、多样性和密度特征及其动态变化. 结果表明,不同植被恢复模式下消落带种子雨的物种组成和物种多样性及其时空动态有较大差异. 其中人工恢复地种子雨包含29种植物,而自然恢复地有36种,组成均以一年生和多年生草本为主. 人工恢复地的物种多样性指数低于、但优势度指数高于自然恢复地. 种子雨的多样性以消落带出露初期和后期为高,中期较低;消落带中上部高于中下部. 人工恢复地种子雨月平均密度为150.09(± 34.118)粒/m2,以7月份为最高;而自然恢复地为138.72(± 51.298)粒/m2,以4月份为最高. 人工恢复地各水位高度种子雨平均密度为489.60(± 31.195)粒/m2,自然恢复地为445.16(± 49.974)粒/m2,空间分布均以165 m处的种子雨平均密度最高. 两种恢复地的地表植物群落和种子雨的相似性较高,其中人工恢复地相似系数略高于自然恢复地. 综上所述,人工恢复有效增加了消落带植物群落种子雨的密度,并对种子雨的组成和时空分布产生影响,促进了消落带,特别是消落带下部等难以恢复地段植物群落的生态恢复. (图5 表5 参39)
Abstract:
Seed rain determines the regeneration potential and evolution of plant community to a certain extent. This research aimed to explore the characteristics and dynamics of composition, biodiversity and density of seed rain through germination experiments of samples collected from the artificial and natural restoration sites in the drawdown zone of the Xiangxi River. The results showed that restoration method had significant effects on the composition, biodiversity and temporal and spatial dynamics of seed rain. There were 29 species in seed rain on the artificial restoration sites and 36 species on the natural restoration sites. The seed rain was mainly composed of annual and perennial herbaceous species in both of the restoration sites. The species biodiversity index of the artificial restoration sites was lower than that of the natural restoration site, but its dominance index was higher than that of the natural restoration site. The biodiversity of seed rain was relatively higher during the early and late exposing periods of the drawdown zone, but lower during the medium exposing period. The biodiversity of seed rain on the middle and upper part of the drawdown zone was higher than that on the middle and lower part. The monthly average density of seed rain on the artificial restoration site was about 150.09 (± 34.118)/m2. peaking in July, but was about 138.72 (± 51.298)/m2 on the natural restoration site peaking in April. The average density of seed rain in all water levels was about 489.60 (± 31.195)/m2 in the artificial restoration site and 445.16 (± 49.974)/m2 in the natural restoration site, with the highest density at 165 m in both restoration sites. The two restoration sites had a high similarity index of species composition between plant community and seed rain, though that of the artificial restoration site was relatively higher than the natural restoration site. It is concluded that artificial restoration effectively increases the seed rain density of riparian plant community in the drawdown zone, and promotes the ecological restoration of riparian bank, especially the lower part of riparian bank that is difficult to restore. The riparian plant community would keep dominated by annual and perennial herbaceous species for long time under the influence of the reverse water-level fluctuation in the Three Gorges Reservoir area.

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更新日期/Last Update: 2016-12-30