生態農業：農業溫室氣體減量【生命科學系/林幸助特聘教授】
| 論文篇名 | 英文：Significance of belowground production to the long-term carbon sequestration of intertidal seagrass beds 中文： 潮間帶海草床地下部生產量對於長期碳吸存的重要性 |
| 期刊名稱 | Science of the Total Environment |
| 發表年份,卷數,起迄頁數 | 2021, 800, no.149579. |
| 作者 | Zou, Yi-Fang; Chen, Kuan-Yu; Lin, Hsing-Juh(林幸助)* |
| DOI | 10.1016/j.scitotenv.2021.149579 |
| 中文摘要 | 海草床高生物量及底質特性使得其地下部成為重要碳匯。但是地下部生產量及分解作用鮮少研究。為了評估海草地下部對於碳吸存的重要性，我們建構南臺灣潮間帶兩種海草(演替末期之泰來草及演替前期之單脈二藥草)之海草床地下部碳收支。這兩種海草地下部的替換率比地上部要長，所以地下部的生物量比地上部高。兩種海草種類的葉片生產力都比地下部高，但是大部分地上部的生產量在一年內就分解。演替末期的泰來草因為翻轉率及分解率都低，所以比演替初期的單脈二藥草儲存在底質更多的碳。20年海草床長期底質深度的變化資料顯示在潮間帶低潮位，海草床的底質緩步增加，但是在高潮位或落山風迎風面的底質不變或緩步減少。我們估算泰來草與單脈二藥草地下部生產量的碳儲存速率是0.3–4.7 and 1.5–2.3 g C m−2 yr−1，能貢獻達53%的潮間帶低潮位長期底土有機碳匯量。 |
| 英文摘要 | The high biomass and sediment features of seagrass beds can make their belowground portions critical sources of blue carbon sinks. However, seagrass belowground production and decomposition have rarely been quantified in the field. To assess the significance of seagrass belowground production to carbon sequestration, belowground carbon budgets were constructed in intertidal seagrass beds of the late-successional species Thalassia hemprichii and the early-successional species Halodule uninervis in southern Taiwan. For both species, the turnover rates of the belowground portions were much longer than that of the aboveground portion, so the belowground biomass was much higher than the aboveground biomass. The leaf productivity of both species was significantly higher than the belowground productivity, but most of the leaf production decomposed within a year. The lower turnover and slower decomposition rates of the belowground portions allowed the late-successional seagrass T. hemprichii to store more carbon in the sediments than the early-successional seagrass H. uninervis. Long-term changes for the past 20 years in the sediment depth showed that the sediments of seagrass beds were increasing in the habitats at low elevation but were decreasing or had no clear trends in the habitats at high elevation or on the windward side. The carbon storage rates according to the belowground production of T. hemprichii and H. uninervis were 0.3–4.7 and 1.5–2.3 g C m−2 yr−1 , respectively, which can potentially contribute 53% of the long-term organic carbon storage in the low-elevation sediments |
| 發表成果與本中心研究主題相關性 | 探討氣候變遷影響生物多樣性台灣櫻花鉤吻鮭族群變動之主要因素 |
