Compartmentation and turnover of organic carbon in the Staghorn coral Acropora formosa
Compartmentation and turnover of organic carbon in the Staghorn coral Acropora formosa
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鹿角珊瑚鹿角珊瑚有机碳的划分和周转
DOI：
10.1007/bf00396866
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发表时间：
1980
期刊：
影响因子：
2.4
通讯作者：
M. Devereux
中科院分区：
文献类型：
--
作者：
C. Crossland;David Barnes;T. Cox;M. Devereux
在 24 小时内，用 Na214CO3 分别孵育 4 个鹿角珊瑚菌落 2 小时，然后返回到收集它们的珊瑚礁中。在接下来的 5 天内，每隔一定时间收集末端分支，并分析与骨架和某些有机库相关的放射性。夜间孵化的菌落在珊瑚礁上的 5 天内几乎没有或没有固定放射性损失。然而，在珊瑚礁的前 40 小时内，50-60% 的光合作用固定 14 C 从末端分支中流失。这种放射性的丧失可能是由于珊瑚组织中粘液和溶解的有机碳的释放造成的。光合固定 14 C 的大部分损失是由于脂质（占总 14 C 损失的 80%）和甲醇-水溶性化合物的放射性降低所致。由于 14 C 从大多数测量的代谢池中消失的速度很快，因此很难确定代谢区室中的任何测序。 14 C 在珊瑚礁上的 5 天内都融入到骨架中，尽管在夜间用 Na214CO3 孵育的菌落中，融入率非常低。
Four colonies ofAcropora formosawere incubate with Na214CO3for separate 2 h periods within a 24 h period, and then returned to the reef from which they were collected. Terminal branches were collected at intervals over the following 5 d and analysed for radioactivity associated with the skeleton and certain organic pools. Colonies incubated at night showed little or no loss of fixed radioactivity during the 5 d on the reef. However, 50–60% of photosynthetically-fixed14C was lost from the terminal branches during the first 40 h on the reef. This loss of radioactivity probably resulted from release of mucus and dissolved organic carbon from the coral tissues. Most of the loss of photosynthetically-fixed14C was due to decrease in the radioactivity of lipids (80% of the total14C loss) and methanol-water soluble compounds. Determination of any sequencing in metabolic compartments was made difficult by the rapidity with which14C dissappeared from most of the metabolic pools measured.14C was incorporated into the skeleton throughout the 5 d on the reef, although the rate of incorporation was very low in colonies which had been incubated with Na214CO3at night.