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| 海南岛红树林生态系统总初级生产力分布格局及形成机制 |
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郑尹齐1,2,3, 史 娴3,4, 陈 权3,5, 乌 兰3,5, 崔 嵬6,
王文梅1,2, 孙仲益3,5*, 谭 珂7*
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1. 海南省海洋地质资源与环境重点实验室, 海口 570206;2. 海南省生态环境地质调查院, 海口 570206;3. 海南大学 生态与
环境学院, 海口 570203;4. 黑龙江大学 水利电力学院, 哈尔滨 150006;5. 海南省农林环境过程与生态调控重点实验室,
海口 570228;6.6. 国家林业和草原局发展研究中心, 北京 100714;7.7. 广西壮族自治区
中国科学院 广西植物
研究所,广西喀斯特植物保育与恢复生态学重点实验室, 广西 桂林 541006
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| 摘要: |
| 红树林具有较高的光合速率和较低的光补偿点,表现出较高的总初级生产力(gross primary production,GPP),是“蓝碳”的重要组成。准确估算区域红树林生态系统GPP,并量化其限制因素贡献对于我国实现“双碳”目标具有重要意义。该文以海南岛红树林生态系统为研究对象,利用哨兵-2(Sentinel-2)影像和环境因子数据,基于红树植被光合作用-光能利用效率(MVP-LUE)模型估算了2016—2020年期间海南岛红树林生态系统GPP,并探究其时空分布格局及形成机制。结果表明:(1)在研究期间,海南岛红树林生态系统年GPP呈现出增长趋势,在空间上呈现出东部高于西部、北部高于南部的分布格局。(2)在形成机制上,海南岛红树林生态系统月均GPP时空分布格局受到多气象因素的综合影响,年内季节性上GPP在“旱→雨”过渡期随着空气温度(air temperature,Tair)的限制降低和光合有效辐射(photosynthetically active radiation,PAR)与海水温度的促进作用,展现出较高的GPP; 旱季中期Tair低,对GPP限制严重,但随着纬度的降低,红树林生态系统GPP受Tair限制的程度被减弱; 雨季则因较高的云覆盖而使PAR成为GPP的限制因素。该研究结果为评估区域红树林对全球碳循环的贡献提供了基础数据,为揭示影响红树林生态系统碳动态的关键环境因素提供了理论支撑。 |
| 关键词: MVP-LUE模型, 哨兵-2影像, 时空分布格局, 限制因子, 红树林生态系统, 海南岛 |
| DOI：10.11931/guihaia.gxzw202311022 |
| 分类号:Q948 |
| 文章编号:1000-3142(2024)08-1415-13 |
| Fund project:海南省重点研发计划项目(ZDYF2022SHFZ111); 海南省自然科学基金高层次人才项目(322RC580, 422RC594); 海南省海洋地质资源与环境重点实验室开放基金(23-HNHYDZZYHJKF035)。 |
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| Distribution patterns of gross primary production of mangrove ecosystems in Hainan Island and their driving mechanisms |
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ZHENG Yinqi1,2,3, SHI Xian3,4, CHEN Quan3,5, WU Lan3,5, CUI Wei6,
WANG Wenmei1,2, SUN Zhongyi3,5*, TAN Ke7*
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1. Hainan Key Laboratory of Marine Geological Resources and Environment, Haikou 570206, China;2. Hainan Eco-Environmental Geological
Survey Institute, Haikou 570206, China;3. College of Ecology and Environment, Hainan University, Haikou 570203, China;4. College of
Water Conservancy and Electric Power, Heilongjiang University, Harbin 150006, China;5. Hainan Key Laboratory of Environmental
Processes and Ecological Regulation in Agriculture and Forestry, Haikou 570228, China;6.6. Development Research Center of State
Forestry and Grassland Administration, Beijing 100714, China;7.7. Guangxi Key Laboratory of Plant Conservation
and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous
Region and Chinese Academy of Sciences, Guilin 541006, Guangxi, China
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| Abstract: |
| 1. Hainan Key Laboratory of Marine Geological Resources and Environment, Haikou 570206, China; 2. Hainan Eco-Environmental Geological
Survey Institute, Haikou 570206, China; 3. College of Ecology and Environment, Hainan University, Haikou 570203, China; 4. College of
Water Conservancy and Electric Power, Heilongjiang University, Harbin 150006, China; 5. Hainan Key Laboratory of Environmental
Processes and Ecological Regulation in Agriculture and Forestry, Haikou 570228, China; 6. Development Research Center of State
Forestry and Grassland Administration, Beijing 100714, China; 7. Guangxi Key Laboratory of Plant Conservation
and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous
Region and Chinese Academy of Sciences, Guilin 541006, Guangxi, China |
| Key words: MVP-LUE model, Sentinel-2 imagery, spatiotemporal distribution pattern, limiting factors, mangrove ecosystem, Hainan Island |
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