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珊瑚δ18Oc,Sr/Ca和Mg/Ca比值是海水表面温度SST的指示剂,需要采用室内的珊瑚养殖实验给于验证.本文利用新型的室内珊瑚养殖水循环系统和新生长珊瑚培植方法,进行了不同海水温度T(21~28℃)下的鹿角珊瑚的养殖实验,对养殖珊瑚δ18Oc,Sr/Ca和Mg/Ca进行了测定.结果表明,养殖珊瑚δ18Oc,Sr/Ca和Mg/Ca与T均呈现出明显的相关性,线性回归曲线为δ18Oc(‰)=0.1427 T(℃)0.1495(n=18,r=0.955,P<0.0001),斜率0.1427‰/℃落在文献发表值范围(0.13 0.29‰/℃)的低端,Sr/Ca比值随T的上升而下降.而对Mg/Ca比值则相反,随T的升高而增加,Sr/Ca与Mg/Ca呈现负相关关系,其线性回归曲线分别为Sr/Ca(mmol/mol)=0.04156 T+10.59(n=15,r=0.789,P<0.005),Mg/Ca(mmol/mol)=0.04974 T+2.339(n=17,r=0.457,P<0.05),表明Mg/Ca和Sr/Ca每增加1 mmol/mol时,记录的T分别升高5.19℃和降低15.62℃,这些数值均明显低于文献所发表值,文章对此进行了初步讨论.
Coral δ18Oc, Sr / Ca and Mg / Ca ratios are indicators of seawater surface temperature SST and need to be verified by indoor coral breeding experiments.This paper uses a new indoor coral farming water cycle system and new growth coral cultivation methods, The results showed that the δ18Oc, Sr / Ca, Mg / Ca and T of the cultured corals were all higher than those of the coral (R = 0.955, P <0.0001), and the slope of 0.1427 ‰ / ℃ fell in the range of published literature values (0.13 0.29 ‰ / ℃), the ratio of Sr / Ca decreased with the increase of T. However, the ratio of Mg / Ca increased with the increase of T while the ratio of Mg / Ca showed a negative correlation with the ratio of Mg / Ca, The regression curves were respectively Sr / Ca = 0.04156 T + 10.59 (n = 15, r = 0.789, P <0.005) and Mg / Ca (mmol / mol) = 0.04974 T + 2.339 = 0.457, P <0.05), indicating that for every 1 mmol / mol increase of Mg / Ca and Sr / Ca, the recorded T increased by 5.19 ℃ and decreased by 15.62 ℃, respectively, these values were significantly lower than those published in the literature This is a preliminary discussion.