大油坑硫磺噴氣口鄰近區域植群類型與土壤因子對叢枝菌根菌組成之影響

Vegetation and Soil Factors Affecting Arbuscular Mycorrhizal Fungi Community Composition in Dayukeng Fumarole Area

大油坑為台灣規模最大的噴氣孔區，具特殊的土壤環境及獨特的植群組成，本研究於大油坑主噴氣口鄰近區域 3 種不同植群類型中，調查叢枝菌根菌組成，並分析土壤因子與植群組成對叢枝菌根菌組成之影響。調查共記錄 AMF 7 屬 17 種，AMF 的組成隨著遠離噴氣孔，菌種多樣性逐漸增加，而孢子數量卻逐漸減少。大油坑硫磺噴氣口鄰近地區 AMF 的組成與土壤中的 pH 值、土壤全氮及可置換性鈣有明顯的相關性；土壤中孢子數量與土壤之 pH 值、可置換性鎂及可置換性鋁呈顯著負相關；而土壤中菌種數則與土壤全氮呈顯著正相關。 Dayukeng is the largest fumarole area in Taiwan defined by particular soils environment and unique vegetation. In this study the arbuscular mycorrhizal fungi (AMF) composition was examined in three different vegetations in Dayukeng to find out how soil and vegetation factors affect the AMF composition. In total, 17 species in seven AMF genus was recorded. The AMF species diversity increased with distance from the fumarole, but the amount of AMF spores decreased. The AMF composition in Dayukeng correlated with soil pH, total nitrogen and exchangeable calcium significantly. The amount of AMF spores was significantly and negatively correlated with soil pH, exchangeable magnesium and exchangeable aluminum, whereas AMF species diversity was significantly and positively correlated with total nitrogen.

Dayukeng is the largest fumarole area in Taiwan defined by particular soils environment and unique vegetation. In this study the arbuscular mycorrhizal fungi (AMF) composition was examined in three different vegetations in Dayukeng to find out how soil and vegetation factors affect the AMF composition. In total, 17 species in seven AMF genus was recorded. The AMF species diversity increased with distance from the fumarole, but the amount of AMF spores decreased. The AMF composition in Dayukeng correlated with soil pH, total nitrogen and exchangeable calcium significantly. The amount of AMF spores was significantly and negatively correlated with soil pH, exchangeable magnesium and exchangeable aluminum, whereas AMF species diversity was significantly and positively correlated with total nitrogen.