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[1]游 冲 莫 雪 张 森 郑 义 刘福德**.天津独流减河河口不同植物群落的生态化学计量学特征[J].应用与环境生物学报,2019,25(03):1-13.[doi:10.19675/j.cnki.1006-687x.2018.08001]
 YOU Chong,MO Xue,ZHANG Sen,et al.The stoichiometric characteristics of different plant communities in Duliujian River estuary*[J].Chinese Journal of Applied & Environmental Biology,2019,25(03):1-13.[doi:10.19675/j.cnki.1006-687x.2018.08001]
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天津独流减河河口不同植物群落的生态化学计量学特征()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
25卷
期数:
2019年03期
页码:
1-13
栏目:
研究论文
出版日期:
2019-06-25

文章信息/Info

Title:
The stoichiometric characteristics of different plant communities in Duliujian River estuary*
文章编号:
201808001
作者:
游 冲 莫 雪 张 森 郑 义 刘福德**
天津理工大学环境科学与安全工程学院 天津 300384
Author(s):
YOU Chong MO Xue ZHANG Sen ZHENG Yi & LIU Fude**?
School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China
关键词:
河口湿地植物群落化学计量学特征驱动因子
Keywords:
estuarine wetland plant communities stoichiometric characteristics drivers
DOI:
10.19675/j.cnki.1006-687x.2018.08001
摘要:
以独流减河河口及其潮上带区域的互花米草(Spartina alterniflora Loisel.)、芦苇(Phragmites australis (Cav.) Trin. ex Steud.)和盐地碱蓬((Linn.) Pall.)群落为研究对象,研究该区域不同植物群落化学计量学特征及其驱动因素。结果显示,互花米草和芦苇地上部分C含量显著高于盐地碱蓬,而根系中的C含量则反之,显示了植物不同的C分配策略。N、P主要分布在植物地上部分光合器官,N含量与全国湿地植物和全球植物相当,但P含量显著高于全国湿地植物和全球植物。S在芦苇和盐地碱蓬体内主要分布在地上部分,而互花米草的S则主要分布在根系中,这有利于互花米草拓展地下空间,从而加速其入侵。互花米草的C/P,芦苇的C/N均显著高于其他植物,说明前者具有较高的P利用效率,而后者的N利用效率较高。河口潮上带芦苇和盐地碱蓬叶片N/P分别为7.32和8.90,而潮间带互花米草叶片N/P为14.45,根据生长速率假说表明生长速率并不是互花米草与芦苇和盐地碱蓬竞争的有效手段,而高的P利用效率为互花米草种群的扩张创造了条件。相关性分析表明,在独流减河河口地区土壤P和盐度是植物体内元素平衡和生态化学计量变化的重要影响因子。综上,天津独流减河河口湿地正经历着由N限制向P限制的转变,P元素在该区域植物生长和演替方面起着重要作用。(图5 表2 参36)
Abstract:
For a comprehensive understanding of plant community succession and stoichiometric balance in estuarine and coastal wetland under nutrient limitation conditions, the carbon (C), nitrogen (N), phosphorus (P), sulfur (S) stoichiometry and their potential drivers for different plant communities in Duliujian River estuary were studied. The concentrations of C, N, P, S in different organs (leaf, stem and root) of Suaeda salsa (Linn.) Pall, Phragmites australis (Cav.) Trin. ex Steud. and Spartina alterniflora Loisel., and the the environmental factors of soil C, soil N, soil P, soil S, salinity and pH in the surface soil (0-10 cm) were determined. The results showed that the content of C in the aerial organs of Spartina alterniflora and Phragmites australis were significantly higher than the Suaeda salsa, but opposite to the root, indicating that the different carbon allocation strategies of plants. N and P are mainly distributed in the aerial photosynthetic organs of plants. The contents of N in Duliujian River estuary are almost equal to the vegetation in global and the wetland vegetation in China, but the contents of P in Duliujian River estuary are significant higher than the vegetation in global and the wetland vegetation in China. S is mainly distributed in the aerial organs in Suaeda salsa and Phragmites communis, while distributed in the roots of Spartina alterniflora, indicating that S is conducive to promoting mutual flowering and accelerating the invasion. The C/P of Spartina alterniflora were the highest and the C/N of Phragmites communis were the highest, suggesting that Spartina alterniflora has higher P use efficiency and Phragmites communis has higher N use efficiency. In the leaf, The N/P of Phragmites communis and Suaeda salsa in Supra tidal zone were 7.32 and 8.90, respectively, but the N/P of Spartina alterniflora in intertidal zone were 14.45, according to the Growth Rate Hypothesis, the growth rate is not an effective means of competition between Spartina alterniflora and Phragmites australis and Suaeda salsa. But the higher N use efficiency accelerating the invasion of Spartina alterniflora. Meanwhile, the correlation analysis indicated that Soil P and salinity were proved to be the important factors affecting the element balance in plants and stoichiometry change in Duliujian River estuary. We conclude that the Duliujian River estuary is being transformed from N limitation to P limitation. P element plays an important role in plant growth and succession in this area.? ??

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备注/Memo

备注/Memo:
收稿日期Received: 2018-08-01 接受日期 Accepted: 2018-10-16
*国家自然科学基金项目(41303057)和天津市应用基础与前沿技术研究计划项目(14JCYBJC23000)资助?
**通讯作者 Corresponding author (E-mail: fudeliu2005@163.com; lfdsy@tjut.edu.cn)?
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更新日期/Last Update: 2018-11-19