生態農業：農業溫室氣體減量【生科系林幸助特聘教授】
論文篇名 英文：Ontogenetic habitat usage of juvenile carnivorous fish among seagrass-coral mosaic habitats
中文： 海草床與珊瑚嵌合棲地中肉食性幼魚之成長棲地
期刊名稱 Diversity
發表年份,卷數,起迄頁數 2019, 11, 25
作者 Lee CL, Wen CKC, Huang YH, Chung CY, Lin HJ*
DOI 10.3390/d11020025
中文摘要 海草床及珊瑚礁對於珊瑚礁魚類而言皆是重要棲地，也常在熱帶沿岸形成嵌合式棲地。但是珊瑚礁魚類如何使用這些複合式棲地仍是未知。此研究目的在檢驗影響珊瑚礁幼魚棲地的因子。我們分別量化東沙四種珊瑚礁魚類(龍占及笛鯛)在4種不同棲地型態之食餌數量、潛在競爭者及掠食者。我們發現珊瑚優勢之棲地有較豐富之大型甲殼類食餌、但是也有很多競爭者及幼魚掠食者。我們發現食物可取得量是龍占及笛鯛在成長過程選擇棲地最重要的因素。掠食壓力只對小型的龍占幼魚有強烈影響，但是對於大型亞成魚及笛鯛沒有影響。這4種魚類在成長過程中有不同的棲地選擇。因此類似嵌合型棲地在珊瑚礁後生態系中珊瑚礁魚類成長過程中重要的棲地需求。
英文摘要 Seagrass beds and coral reefs are both considered critical habitats for reef fishes, and in tropical coastal regions, they often grow together to form “mosaic” habitats. Although reef fishes clearly inhabit such structurally complex environments, there is little known about their habitat usage in seagrass-coral mosaic habitats. The goal of this study was to examine potential factors that drive habitat usage pattern by juvenile reef fishes. We quantified (1) prey availability, (2) potential competitors, and 3) predators across a gradient of mosaic habitats (n = 4 habitat types) for four dominant carnivorous fishes (lethrinids and lutjanids) in the main recruitment season at Dongsha Island, South China Sea. We found that the coral-dominated habitats had not only a higher availability of large crustacean prey but also a higher abundance of competitors and predators of juvenile fishes. Food availability was the most important factor underlying the habitat usage pattern by lethrinids and lutjanids through ontogeny. The predation pressure exhibited a strong impact on small juvenile lethrinids but not on larger juveniles and lutjanids. The four juvenile fishes showed distinct habitat usage patterns through ontogeny. Collectively, mosaic habitats in the back reef system may be linked to key ontogenetic shifts in the early life histories of reef fishes between seagrass beds and coral reefs.