基金项目:国家重点研发计划?021YFC2600405),水体污染控制与治理科技重大专项(No.2017ZX07602-004-003),中央高校基本科研业务费专项(2015ZCQ-BH-01(/div>
详细信息
姜帆。主要研究方向:湿地植被恢复与重建。Email9a href="//www.inggristalk.com/j/article/doi/10.12171/mailto:1061449208@qq.com">1061449208@qq.com 地址?00083北京市海淀区北京林业大学生态与自然保护学院
李红丽,教授。主要研究方向:湿地生态学、入侵生态学。Email9a href="//www.inggristalk.com/j/article/doi/10.12171/mailto:lihongli327@163.com">lihongli327@163.com 地址:同三/span>
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出版历程
- 收稿日期:2021-12-29
- 修回日期:2022-03-29
- 网络出版日期:2022-08-06
Short-term effects of disturbance and nitrogen deposition onAlternanthera philoxeroidesinvading wetland plant communities
- Jiang Fan1, 2,,
- A Siha1, 2,
- Cai Jingfang1, 2,
- Sun Kai1, 2,
- Shen Yiluan1, 2,
- Gao Haiyan3,
- Li Hongli1, 2,,
- 1.
School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China
- 2.
Key Laboratory of Ecological Protection in the Yellow River Basin of National Forestry and Grassland Administration, Beijing Forestry University, Beijing 100083, China
- 3.
Ordos Vocational College of Eco-environment, Ordos 017010, Inner Mongolia, China
摘要:
目的干扰和氮沉降是影响植物入侵的重要环境要素。目前,干扰和氮沉降如何协同影响空心莲子草入侵湿地植物群落的研究相对缺乏。本研究探讨了干扰、氮沉降和湿地植物群落对空心莲子草入侵的短期影响,为入侵植物空心莲子草的物理控制及湿地植被的恢复与重建提供了一定的理论支撑和实践基础、/sec>
方法以入侵植物空心莲子草为主要研究对象,构建4种湿地植物粉绿狐尾藻、水葱、黄花鸢尾和千屈菜组成的湿地植物群落,设计干扰(无干扰、模拟采食、刈割)、氮沉降(无氮添加和氮添加)以及有无湿地植物群落竞争(仅空心莲子草单种模式和空心莲子草与湿地植物群落混种模式)的三因素控制试验、/sec>
结果模拟采食和刈割两种干扰显著降低了空心莲子草的生长繁殖指标,且刈割相较于模拟采食影响更大。刈割处理下空心莲子草生物量、茎长和节数的相对生长率为负值,同时,刈割处理下空心莲子草生物量、茎长和分枝数的补偿系数均显著小于模拟采食处理,但存在欠补偿生长;湿地植物群落显著影响了空心莲子草根、叶、总生物量、叶片数、茎长和分枝数等指标;而氮沉降仅显著影响了空心莲子草分枝数补偿系数。除叶片数和分枝补偿系数,干扰与氮沉降对空心莲子草入侵的湿地植物群落并没有显著的交互作用、/sec>
结论模拟采食和刈割两种干扰一定程度上抑制空心莲子草的入侵,且随着干扰强度增加,对空心莲子草生长恢复抑制效应越强。氮沉降对空心莲子草综合指标影响不显著。本地湿地植物群落一定程度上可抑制空心莲子草入侵。而干扰与氮沉降的交互作用仅对空心莲子草叶片数和分枝数补偿系数有显著影响,对其入侵的湿地植物群落并无显著作用、/sec>
Abstract:
ObjectiveDisturbance and nitrogen deposition are important environmental factors influencing plant invasion. At present, studies on the synergistic effects of disturbance and nitrogen deposition on plant communities in wetland invaded by
Alternanthera philoxeroidesare relatively lacking. This study was to explore the short-term effects of disturbance, nitrogen deposition and wetland plant communities on
A. philoxeroidesinvasion, which established a strong theoretical support and practical foundation for the physical control of
A. philoxeroidesand the restoration and reconstruction of wetland vegetation.
MethodIn this study, invasive plant
A. philoxeroidesand four wetland plant communities, including
Myriophyllum aquaticum,
Scirpus validus,
Iris wilsoniiand
Lythrum salicariawere selected as the subjects. And three-factor control experiments were designed for invasive plant disturbance (no disturbance, simulated herbivory, mowing), nitrogen deposition (no nitrogen addition and with nitrogen addition), and native plant competition or not (only
A. philoxeroidesmodes, and
A. philoxeroidesand wetland plant communities composed by 4 plant species).
ResultSimulated herbivory and mowing had significantly reduced the growth and reproduction traits, including the relative growth rate basing on biomass, plant height and node number of
A. philoxeroides. And mowing had a greater impact than simulated herbivory. The growth rate of biomass, stem length and internode numbers of
A. philoxeroideswas negative under mowing, the compensation index of biomass, stem length and ramet numbers of
A. philoxeroideswas significantly lower than those of simulated herbivory treatment, but there was insufficient compensation. Furthermore, the wetland plant community significantly reduced the indexes including root, leaf, total biomass, leaf number, stem length and branch number of
A. philoxeroides. However, nitrogen deposition only significantly affected the compensation coefficient of
A. philoxeroidesbranching. Except for leaf number and branching compensation coefficient, there was no significant interaction between disturbance and nitrogen deposition on plant communities in the wetland invaded by
A. philoxeroides.
ConclusionSimulated herbivory and mowing were not conducive to the invasion of
A. philoxeroidesto a certain extent, and had a strong inhibitory effect on the growth and recovery of
A. philoxeroideswith the increase of interference intensity. Nitrogen deposition did not significantly affect the composite indicator of
A. philoxeroides. The local wetland plant community can inhibit the invasion of
A. philoxeroidesto a certain extent. Combined of the disturbance and nitrogen deposition only had a significant effect on the compensation coefficient of number of leaves and number of ramets, but had no significant effect on the wetland plant community invaded by
A. philoxeroides.
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