台北盆地景美溪口全新世早期水筆仔樹林的發現

An Early Holocene Kandelia obovata swamp forest in the Taipei Basin, Taiwan

台北盆地新店、景美溪交匯處的河灘地出露化石森林，碳十四測年為距今七千四百年前。本研究利用切片與電子顯微鏡觀察，依照木材組織結構特徵，確認該化石林屬於紅樹科的水筆仔Kandelia obovata Sheue, Liu & Yong。比對現存水筆仔生存環境，本研究露頭位置在標本生長時期為適合水筆仔發展為純林的鹹水環境。

An in-situ fossil forest, dated ~7400 cal BP by the radiocarbon method, was exposed on the modern riverbed near the confluence of Xindian and Jingmei rivers in the Taipei Basin, Taiwan. On the basis of wood anatomy characteristics through thin-section and electron microscopic observations, we confirm that the exposed forest is of mangrove types, specifically Kandelia obovata Sheue, Liu & Yong. Comparing the environment of the existing Kandelia obovata, the outcrop position of this study was salt water environment which is suitable for the Kandelia obovata specimens to develop into pure forest during its growth period.