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：Allometric equations may underestimate the contribution of fine roots to mangrove carbon sequestration 中文：異數方程式可能會低估紅樹林細根對於碳吸存力的貢獻 |
| 期刊名稱 | SCIENCE OF THE TOTAL ENVIRONMENT |
| 發表年份,卷數,起迄頁數 | 2022, 833, 155032 |
| 作者 | Chou, Meng-Quen; Lin, Wei-Jen; Lin, Chiao-Wen; Wu, Hsin-Hsun; Lin, Hsing-Juh(林幸助)* |
| DOI | 10.1016/j.scitotenv.2022.155032 |
| 中文摘要 | 小於直徑2 mm之生物量及細根常在計算紅樹林碳匯時被忽略，或利用異數方程式估算。此研究實地量測紅樹林水筆仔與海茄苳之細根生務量及生產量，藉以評估細根之重要性。水筆仔與海茄苳之地上部分別佔碳存量之44%及32%，非細根佔17%。水筆仔之細根及死細根佔碳存量5%，但是具有呼吸根之海茄苳細根及非細根比例較高，佔12%。與野外實地量測值比較，利用異數方程式計算之地下部淨生產量明顯低估，尤其是具有呼吸根之海茄苳。水筆仔與海茄苳地上部淨生產量平均 17.04 and 7.46 Mg C ha-1 yr-1，但是84% 和 92% 的枯落物在一年內消失。扣除水筆仔4%的細根及海茄苳17%的細根在土壤中分解，分別還有 13.67 Mg C ha-1 yr-1水筆仔及11.05 Mg C ha-1 yr-1 海茄苳會存入土壤中。如此將增加僅由枯落物去估算兩者紅樹林碳吸存能力之5及19倍。我們的研究證實係跟應該被納入紅樹林碳收支模式中。 |
| 英文摘要 | The biomass and production of fine roots (diameter < 2 mm) are often omitted or derived simply from allometric equations when calculating mangrove carbon sinks. The purpose of this study was to assess the significance of fine roots by measuring the biomass and production of the fine roots in two mangrove species (Kandelia obovata and Avicennia marina) with distinct root structures. The aboveground portion of K. obovata and A. marina contributed 44% and 32% of the total carbon stock, respectively. The nonfine roots accounted for 17% of the total carbon stock of both mangrove species. The fine roots and dead fine roots of K. obovata contributed 5% of the total carbon stock, whereas the contribution of fine roots and dead fine roots of A. marina, which possessed pneumatophores, was higher (12%). Comparison of the field measurements with the estimates of belowground net production derived from frequently used allometric equations showed that equation-derived estimates were notably underestimated, particularly for A. marina. The aboveground net production of K. obovata and A. marina averaged 17.04 and 7.46 Mg C ha-1 yr-1, respectively, but 84% and 92% of the litterfall was lost after a year. Subtracting only 4% of the fine root production of K. obovata and 17% of the fine root production of A. marina to account for further decomposition in the soils within a year, an additional 13.67 Mg C ha-1 yr-1 for K. obovata and 11.05 Mg C ha-1 yr-1 for A. marina were calculated to be buried in the soils, which can increase the carbon sequestration capacity estimated from aboveground litterfall only by 5 and 19 times, respectively, for each mangrove species. This suggests that the contribution of fine roots should be accounted for when estimating mangrove carbon sinks. |
| 發表成果與本中心研究主題相關性 | 量測並評估自然碳匯紅樹林細根對於碳吸存力之貢獻程度 |
