热带海洋学报

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广西山口不同演替阶段红树植物叶茎根的生态化学计量特征

邱 瑾1, 2, 3, 戴洪涛4, 邢永泽2*, 黄大吉2, 1*, 尹群健2, 程德伟2   

  1. 1. 上海交通大学海洋学院,上海 200030;

    2. 广西北部湾海洋资源环境与可持续发展重点实验室(自然资源部第四海洋研究所),广西 北海 536015;

    3. 卫星海洋环境动力学国家重点实验室(自然资源部第二海洋研究所),浙江 杭州 310012;

    4. 广西山口红树林生态自然保护区管理处,广西 北海  536122

  • 收稿日期:2022-05-23 修回日期:2022-07-28 出版日期:2022-08-02 发布日期:2022-08-02
  • 通讯作者: 邢永泽
  • 基金资助:

    国家自然科学基金项目(42049911, 42141016);自然资源部第四海洋研究所基本科研业务费专项资金资助项目(202005);广西红树林保护与利用重点实验室系统性课题项目(GKLMC-17A01)

Leaves, stems and roots stoichiometry characteristics of mangrove plants at different succession stages in Shankou National Mangrove Nature Reserve, China

QIU Jin1, 2, 3, DAI Hongtao4, XING Yongze2*, HUANG Daji2, 1*, Yin Qunjian2, CHENG Dewei2   

  1. 1. School of Oceanography, Shanghai Jiao Tong University, 1954 Huashan Rd., Shanghai 200030, China;

    2. Guangxi Key Laboratory of Beibu Gulf Marine Resources, Environment and Sustainable Development (Fourth Institute of Oceanography, Ministry of Natural Resources), Beihai 536015, China;

    3. State Key Laboratory of Satellite Ocean Environment Dynamics (Second Institute of Oceanography, Ministry of Natural Resources), Hangzhou 310012, China; 4. Shankou National Mangrove Ecosystem Nature Reserve Administration, Beihai 536122, China

  • Received:2022-05-23 Revised:2022-07-28 Online:2022-08-02 Published:2022-08-02
  • Contact: Yong-Ze XING
  • Supported by:

    National Natural Science Foundation of China (42049911, 42141016); Scientific Research Fund of the Fourth Institute of Oceanography, MNR (202005); The Research Fund Program of Guangxi Key Lab of Mangrove Conservation and Utilization (GKLMC-17A01)

摘要: 红树林是典型的滨海湿地生态系统, 研究其生态化学计量特征对了解不同演替阶段红树植物养分利用、分配以及环境适应策略具有重要意义。本文以广西山口红树林保护区由海向岸不同演替阶段的三种红树植物(白骨壤、秋茄和木榄)为研究对象, 比较不同器官碳(C)、氮(N)、磷(P)以及沉积物中有机碳(SOC)、全氮(TN)、全磷(TP)的化学计量特征,分析三个演替阶段的红树植物不同器官和沉积物养分的生态化学计量特征。结果表明: C、N、P含量在三个演替阶段植物中均表现为叶、茎大于根(P<0.05), 白骨壤叶和茎的N、P含量显著高于秋茄和木榄(P<0.05), 不同演替阶段植物对于养分的利用策略不同, 演替初期为竞争, 演替后期为防御。相关性分析显示, 秋茄茎与根中的P含量呈显著负相关(P<0.05), 木榄叶与茎中的N含量、P含量均呈显著正相关(P<0.05), 红树植物叶、茎的N、P含量与土壤SOC、TP以及C:N有显著的负相关性, 随着由海向岸的群落演替, 红树植物生长从N限制转为N、P两种元素共同限制。

关键词: 红树植物, 演替, 适应机制, 生态化学计量学

Abstract: Mangroves ecosystem are one of the typical coastal wetland ecosystem. Studying their ecological stoichiometry characteristics is important to understand the nutrient utilization, distribution and the environmental adaptation strategies of mangrove plants in different successional stages. In the present study, three typical mangrove species, Avicennia marina, Kandelia obovate, and Bruguiera gymnorrhiza were studied. The stoichiometry characteristics of carbon (C), nitrogen (N), and phosphorus (P) in different organs and the organic carbon (SOC), total nitrogen (TN), and total phosphorus (TP) in the sediments were measured and compared. The ecological stoichiometry characteristics of different organs and sediment nutrients in three intertidal zones of mangrove plants were also analyzed. The results showed that the C, N, and P contents of the three mangrove plants were higher in the leaves and stems than that in the roots(P<0.05). The N and P contents in the leaves and stems of A. marina were significantly higher than those of K. obovate and B. gymnorrhiza (P<0.05). Mangrove plants had unique adaptation strategies to habitats of different intertidal zones. In the early stage of succession, the plants were distributed in low tide with a competitive strategy. In the advanced stage of succession, the plants were distributed in high tide and the strategy was changed to defensive. Correlation analysis showed that the P content in the stems and roots of K. obovate was negatively correlated (P<0.05), while the N and P contents in the leaves and stems were positively correlated (P<0.05). The contents of N and P in the leaves and stems were negatively correlated with SOC, TP and C:N. It was also found that with the succession of mangrove communities from the sea towards the land, the limiting element for the mangrove plants growth has changed from N to both N and P.

Key words: mangrove plant, succession, adaptation strategy, Ecological stoichiometry