| 摘要: |
| 红树林具有促淤保滩、巩固堤岸、抵御生态风险、维持生态平衡等多种功能，在净化水体和改善环境质量等方面有明显的优势和特殊贡献。为了探索红树林种植对水体富营养化的缓解能力，本研究以福建厦门市筼筜湖不同林龄的人工秋茄（Kandelia obovata）林为对象，对其各器官和凋落物中的氮（N）、磷（P）含量进行测定，进而估算红树林吸收筼筜湖N、P总量。结果显示，随着林龄的增加，植物各器官和凋落物的平均N、P含量均显著增加，其中植物叶片和凋落叶中的N、P含量相较于其他器官增幅更大。从1999年红树林种植至2013年，筼筜湖红树林以现存生物量的形式从筼筜湖吸收的N、P总量分别为1 948.83、178.61 kg，2013年全年N、P归还总量分别为7.47、0.58 kg，2013年全年N、P吸收总量分别为201.68、19.57 kg。红树林可通过吸收N、P，缓解筼筜湖的水体富营养化。 |
| 关键词: 海洋生物学 氮含量 磷含量 筼筜湖 缓解水体富营养化 |
| DOI：10.3969/J.ISSN.2095-4972.20240530001 |
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| 基金项目:国家自然科学基金（42376162,42076142，41076049）；国家重点研发项目（2022YFF0802201） |
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| Study on nitrogen and phosphorus absorption capacity of Kandelia obovata at Yundang Lake in Xiamen |
| WANG Zhongtang,QIU Yue,LU Changyi,YE Yong |
| (Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystem, College of the Environment and Ecology, Xiamen University, Xiamen 361102, Fujian, China) |
| Abstract: |
| Mangroves have many functions, such as promoting siltation and protecting beaches, consolidating embankments, resisting ecological risks and maintaining ecological balance. They have obvious advantages and special contributions in purifying water and improving environmental quality. In order to explore the mitigation ability of mangroves on water eutrophication, this study took artificial Kandelia obovata forests with different stand ages at Yundang Lake as the object, and determined the contents of nitrogen (N) and phosphorus (P) in their organs and litter, estimated the total amount of N and P absorbed by mangroves. Results showed that with the increase of stand age, the average N and P contents in plant organs and litter increased significantly, especially in plant leaves and litter leaves. From the mangrove planting in 1999 to 2013, the total amount of N and P absorbed by mangroves at Yundang Lake in form of existing biomass was 1 948.83 and 178.61 kg, respectively. The total amount of N and P returned was 7.47 and 0.58 kg and the total absorption of N and P was 201.68 and 19.57 kg, respectively, in 2013. Mangroves can absorb N and P, which can alleviate the eutrophication of Yundang Lake. |
| Key words: marine biology nitrogen content phosphorus content Yundang Lake alleviate water eutrophication |
