南仁湖位於墾丁國家公園東北部南仁山生態保護區內，是公告的國家重要濕地，但近年來卻顯示因自然演替而陸化嚴重，本研究透過長期監測吳首賢(2003)和陳依盈(2013)在2000和2012年所設立調查的樣區，了解長期植物豐量和多樣性的變化，以及2020年主湖西側刨除作業對濕地植物的影響。本年度2022年調查共記錄有47種水生植物，湖區水生植物的種類數和多樣性都比2012年增加，但未恢復到2000年時的種數，湖區草澤記錄有43種陸生植物，覆蓋度佔約20%。主湖西側的刨除作業有利於小型濕地植物定殖，使得主湖西側水生植物種類數由2019年的12種增加到今年的29種，有刨除部分的shanon植物多樣性達2.3，而沒有進行刨除的東側草澤則只有1.45且多為陸生植物，雖然但鋪地黍回復快，但仍可在2年半後看到實質的效應，建議未來可在其他區域局部進行，以小規模的擾動來維持水生植物多樣性。本年度另外將7種瀕危水生植物移植至氣候相似的南仁山工作站進行移地保育並且進行解說員訓練活動，以使民眾更了解濕地植物的保育與管理。
英文計劃名稱：Inventory of Wetland Vegetation and ex situ Plant Conservation in Nanren Lake
英文摘要：Nanren Lake is located in Nanjenshan Ecological Reserve Area which is situated at the northeastern corner of Kentin National Park. Though Nanren Lake is claimed as a national important wetland, it is suspected to become gradually terrestrialized in recent years due to natural succession. An eradication of dominant macrophyte was done at the southwestern side of lake marsh in May 2020. Our study is to monitor the wetland vegetation species composition in long term and to compare with the plant inventory before to understand the dynamic of vegetation succession. We resurveyed the plots established in 2000 by Shou-Hsien Wu (2003) and compared the results with him and I-Ying Chen (2013) to understand the change of species abundance and diversity. There are 47 water plant species recorded in this year. The species richness and diversity are increased than they in 2012, but not yet reach the numbers in 2000. 43 terrestrial plant species and 20% coverage in the wetland were recorded. The number of wetland plant species of eradicated bank was increased from 12 species in 2019 to 29 species in 2022. The shanon diversity index of eradicated bank is 2.3, much higher than 1.45 in the uneradicated east bank. Though the population of Panicum repens recovered very soon, the effect of improving wetland diversity is still obvious after two- and one-half years. Our results suggest the small-scale disturbance is needed to maintain the wetland vegetation diversity. We planted 7 endanged water plants in near research station to perform the ex situ conservation and also made a training course for the local ecological guides.
計畫屬性：本處委託辦理
執行年度：111
計畫主持人：賴宜鈴
中文關鍵字：南仁湖國家級重要濕地、陸域化、刨除工作、瀕危物種、移地保育
英文關鍵字：Nanren Lake wetland, terrestrialization, eradication, endangered species, ex situ conservation