ICMAM Project Directorate, Ministry of Earth Sciences, Pallikaranai, Chennai, India; NGRBA, Central Pollution Control Board, Eastern Regional Directorate, Kolkata, India.
Wetland Research and Training Centre, Chilika Development Authority, Balugaon, India.
Mar Pollut Bull. 2018 Jun;131(Pt A):460-467. doi: 10.1016/j.marpolbul.2018.04.059. Epub 2018 Apr 27.
Bioavailable dissolved organic carbon (B), nitrogen (B) and their degradation rate constants were measured for the Chilika Lagoon, India. Long-term laboratory incubation experiments (90 days) were conducted at a constant temperature (25 °C) to quantify the bioavailable dissolved organic matter (DOM) and the possible degradation rate coefficients. The results showed that 41 ± 12% of dissolved organic carbon (DOC) and 47 ± 17% of dissolved organic nitrogen (DON) were B and B respectively, with their stoichiometry found to be higher than the Redfield ratio. A first order exponential non-linear fitting routine was used to estimate pool sizes. The degradation rate constant (k) for the B varied from 0.127-0.329 d and B from 0.043-0.306 d during the study period. Half-lives of the B and B ranged from 2.1-5.4 and 2.2-15.9 days, respectively. Overall, the results showed that a fraction of the labile DON was transported from the lagoon to the adjacent coastal sea.
对印度奇利卡 lagoon 的生物可利用溶解有机碳 (B)、氮 (B) 及其降解速率常数进行了测量。在恒定温度 (25°C) 下进行了长期实验室孵育实验 (90 天)，以量化生物可利用溶解有机物 (DOM) 和可能的降解速率系数。结果表明，41±12%的溶解有机碳 (DOC) 和 47±17%的溶解有机氮 (DON) 分别为 B 和 B，其化学计量比高于赤利特比值。使用一阶指数非线性拟合程序来估计库的大小。在研究期间，B 的降解速率常数 (k) 从 0.127-0.329d 不等，B 从 0.043-0.306d 不等。B 和 B 的半衰期分别为 2.1-5.4 和 2.2-15.9 天。总体而言，结果表明，一部分易降解的 DON 从泻湖输送到相邻的沿海海域。
