【學術亮點】Community metabolism and greenhouse gas emissions in abandoned tropical salt pans
Ecological Agriculture: Nature-Based Solutions for Restoring Wetland Carbon Sink under Climate Change【Department of Life Sciences / Lin, Hsing-Juh / Distinguished Professor】
生態農業：氣候變遷下以自然為本之濕地碳匯復育策略【生命科學系/林幸助特聘教授】
| 論文篇名 | 英文：Community metabolism and greenhouse gas emissions in abandoned tropical salt pans 中文：閒置鹽田系統代謝與溫室氣體排放 |
| 期刊名稱 | Estuarine, Coastal and Shelf Sciences |
| 發表年份,卷數,起迄頁數 | 2025, 321: 109327 |
| 作者 | Huang, Shu-Yen; Lin, Wei-Jen; Lee, Li-Hua; Lin, Hsing-Juh(林幸助)* |
| DOI | 10.1016/j.ecss.2025.109327 |
| 中文摘要 | 數千年來，大片沿海濕地已轉變為太陽鹽田。然而，從20世紀開始，鹽產量大幅下降，導致全球許多鹽田被廢棄。沿海濕地通常被認為是藍碳生態系統，但人們對廢棄鹽田的碳通量知之甚少。本研究旨在評估廢棄熱帶鹽田的碳通量，以台灣西南部布台為例，測量社區新陳代謝和溫室氣體（GHG）排放量。群落代謝結果顯示，鹽田中水層群集是自營性，與水葉綠素a濃度密切相關。然而，底棲群集是異營性的，受水溫和溶解無機磷濃度的影響。鹽田中水層和底棲群集的綜合代謝平均碳吸收量為 111.5 g C m-2 yr-1。使用腔室測量的溫室氣體排放結果表明，進入鹽田的二氧化碳通量平均為 139.3 克 CO2 m-2 yr-1，但鹽田排放了少量平均 354.8 mg CH4 m-2 yr-1 和 136.0 mg N2O m-2 yr-1。因此，溫室氣體淨平衡表明，鹽田作為以 92.6 克二氧化碳當量 m-2 yr-1 的平均速率去除溫室氣體的系統。閒置熱帶鹽田的二氧化碳去除能力優於無植被的沿海濕地，顯示出緩解氣候變遷的潛力。 |
| 英文摘要 | A large area of coastal wetlands has been converted into solar salt pans over thousands of years. However, salt production declined significantly from the 20th century onward, leading to the abandonment of many salt pans globally. Coastal wetlands are generally recognized as blue carbon ecosystems, but little is known about the carbon flux of abandoned salt pans. This study aimed to assess the carbon flux of abandoned tropical salt pans, using a case study in Budai, southwestern Taiwan by measuring community metabolism and greenhouse gas (GHG) emissions. The results of community metabolism showed that the pelagic community of the salt pans is autotrophic, which is closely related to water chlorophyll a concentration. However, the benthic community is heterotrophic, which is influenced by water temperature and dissolved inorganic phosphorus concentration. The combined metabolism of pelagic and benthic communities in the salt pans exhibited an average carbon absorption of 111.5 g C m-2 yr-1. The results of GHG emissions measured with floating chambers indicated that the CO2 flux into the salt pans averaged 139.3 g CO2 m-2 yr-1, but a small amount of averaging 354.8 mg CH4 m-2 yr-1 and 136.0 mg N2O m-2 yr-1 was emitted from the salt pans. Consequently, the net GHG balance indicated that the salt pans serve as systems for removing GHG at an average rate of 92.6 g CO2e m-2 yr-1. The CO2 removal capacity of abandoned tropical salt pans performed better than that of unvegetated coastal wetlands, showing the potential to mitigate climate change. |
| 發表成果與本中心研究主題相關性 | 自然碳匯之估算 |
