知本溼地為台東縣射馬干溪與知本溪沖積形成的大面積海岸草地區域，與其他海岸溼地不同之處，在於本處為射馬干溪沒口形成的淡鹹水草澤區，同時擁有乾旱陸域植被外觀及零星的湧泉溼地，位於花東縱谷之末，造就了鳥類生物多樣性的豐富的環境，為東部國際級重要野鳥棲息環境(IBA)。以前知本濕地從未有研究分析火災和未受火災地區植物的變化，因此本研究調查了2017年至2019年的火災植被演替情況(Succession)，以了解2017年三月大火後到2019年四月火災中間火災干擾因子對於物種豐富度，植物密度和木本、草本植物在被燒毀和未燒毀地點之間的各項比較。結果顯示知本濕地優勢物種均以萌蘗更新為主，同時也能以種子更新，在火災後快速更新的物種當中，除茵陳蒿之外均為外來物種，推測頻繁的火災是知本濕地以外來種為主的成因，外來種植物比本地植物火災後具有更好的競爭能力來佔領開放的冠層土地。本研究建議除了需要繼續加強防止外來植物入侵以及通過人為方式移除外來入侵物種來恢復知本濕地地區的原生植被，尤其火災後的自然演替方式並無法恢復原生植物物種，還需要藉由人工種植本土種植物方式來達成復育知本濕地原生植被以維持良好濕地生態系統。

The Zhiben Wetland is a large coastal grassland area formed by the alluvial accumulation of Shemagan River and Zhiben River in Taitung County. It is different from other coastal wetlands in that it is a brackish grassy area formed by the Shemagan River, and has a dry land vegetation appearance and sporadic springs in the wetland, located at the end of East Rift Valley, therefore creating a rich environment for birds’ biodiversity. It is a well-known International level important bird area (IBA) in the east of Taiwan. However, no previous research and investigations for plant ecology on this wetland. This study investigates vegetation succession from 2017 to April 2019, following a fire on March 2017 which caused significant differences in species richness, plant density, and the frequency of woody, herb, and grass between burned and unburned sites. Our results show the growth rate of alien seedlings is faster than native seed regeneration. The dominant species of Zhiben wetland are mainly based on the resprout ability, and can also be regeneration with seeds. Among the species that are rapidly renewed after the fire, all of them are alien species except for the native species Artemisia capillaris. It is speculated that frequent fires are the main cause of the dominance by alien species. Alien plants have better competitive ability to occupy open canopy lands than native plants after fire. This research suggests that in addition to continuing to strengthen the prevention of alien plant invasions and the artificial removal of alien invasive species to restore the native vegetation in the Zhiben Wetland, especially the way of natural succession after the fire cannot restore native plant species. It also needs to use artificial planting of native plants to regenerate the native vegetation of Zhiben Wetland after fires to maintain a good wetland ecosystem.