重建高分辨率深海环境变化:冷水竹节珊瑚无机地球化学方法

党皓文, 马小林, 杨策, 金海燕, 翦知湣

Reconstructing High-resolution Deep-sea Environmental Change: Inorganic Geochemical Proxy Methods of Cold-water Bamboo Corals

Haowen Dang, Xiaolin Ma, Ce Yang, Haiyan Jin, Zhimin Jian

图1 新西兰查塔姆海丘的活体竹节柳珊瑚(Isidid gorgonian)及竹节珊瑚生长模式 (a) 活体柳珊瑚局部，可见棕红色活体组织(coenenchyme)、黑色软蛋白质节 (slimes)及灰白色碳酸钙骨骼(skeleton)；(b) 去除有机质机体组织后裸露的柳珊瑚骨骼，可见3种分枝形式(主干: main branch, 等价分枝: equivalent branch和非等价分枝: unequivalent branch) 和分枝芽体 (bud)，及碳酸钙节间 (internode)和蛋白质节 (node)构成的竹节状形态特征 ；(c) 竹节珊瑚 (Keratoisis为例) 垂向和横向的生长模式示意图(6阶生长期)：(1) 横向上每一层新的生长层包覆骨骼整体、个体基部为最厚；(2) 垂向上，枝体的生长层分布模式取决于分枝类型 (A: 等价分枝, B: 非等价分枝)；据参考文献[3]修改

Fig.1 Live-collected bamboo corals (Isidid gorgonian) from Chatham Rise, New Zealand and the growth model of bamboo coral (a) Part of a living bamboo coral colony with reddishzucheng coenenchyma, black gorgonian slimes and white carbonate skeleton； (b) Skeletal fragment of the colony after removal of organic tissue exhibiting three branching types (main, equivalent and unequivalent branches) and the bud, and also the characteristics resembling a bamboo built by carbonate internodes and gorgonian nodes； (c) Sketches of the longitudinal and transversal growth modes of a bamboo coral (Keratoisis) showing incremental growth in six stages. A = equivalent branch; B = unequivalent branch which ceased growth during stage IV； Modified after reference [3]