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：Highly productive tropical seagrass beds support diverse consumers and a large organic carbon pool in the sediments 中文：高生產力的熱帶海草床支持多樣的消費者與大量碳匯儲存 |
| 期刊名稱 | DIVERSITY-BASEL |
| 發表年份,卷數,起迄頁數 | 2021, 13, 544 |
| 作者 | Lee, Chen-Lu; Lin, Wei-Jen; Liu, Pi-Jen; Shao, Kwang-Tsao; Lin, Hsing-Juh(林幸助)* |
| DOI | 10.3390/d13110544 |
| 中文摘要 | 熱帶海草床是生產力高，且提供重要的藍碳匯存與海洋生物棲所的重要沿岸生態系。為了解熱帶海草床中的能量傳遞，我們利用Ecopath軟體，建構南中國海東沙島海草床生態系的食物網營養流動模式，以分析海草床中的營養途徑與生態結構。模式中指出東沙的海草床是發展初期，但結構完整的生態系統。大多海草的生產力鮮少被草食性的初級消費者食用，並流入碎屑循環。而這些有機碎屑成為東沙海草床食物網中最重要的營養來源，支持各種在系統中的消費者。然而，即使有消費者利用，東沙海草床系統中的營養回收率仍低(2.74%)，絕大多的碎屑將成為沉降在海底的碳匯儲存。食碎屑的無脊椎動物在生態系統中因回收有機碎屑回到食物網的營養途徑，成為系統中的基石物種。另外，高階消費者如鯊魚在海草床中因他們的掠食產生的top-down control，進而影響整個生態系統生物量的動態平衡。 |
| 英文摘要 | Tropical seagrass beds are productive coastal ecosystems that are important blue carbon sinks and crucial habitats and feeding grounds for consumers at high trophic levels. To understand how energy sustains the ecosystem from seagrass production, we constructed an Ecopath trophic model to reveal the possible pathways of energy flow in the tropical seagrass beds around Dongsha Island, South China Sea. The model indicates that Dongsha seagrass beds were developing but well-structured ecosystems. The productive seagrasses were rarely directly consumed by herbivores and, ultimately, flowed into detrital pools. Detritus was the main food source used to support diverse consumers in the food web. Nevertheless, the low cycling rate (2.74%) suggests that most detritus was not reused or exported and was stored as a large organic carbon pool in the sediments. The detritus-feeding invertebrates are keystone groups in the Dongsha seagrass beds, as they recycle energy from detritus and transfer to top predators such as sharks. The predation of top predators affected the biomasses of other compartments, leading to strong top-down control via a trophic cascade effect. |
| 發表成果與本中心研究主題相關性 | 探討自然碳匯生態系統海草床之高生物多樣性與碳吸存量之機制 |
