Xia Bin, Ma Shao-Sai, Chen Ju-Fa, Zhao Jun, Chen Bi-Juan, Wang Fang
Key Laboratory for Sustainable Utilization of Marine Fisheries Resource, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China.
Huan Jing Ke Xue. 2010 Jun;31(6):1442-9.
Based on the analysis of dissolved organic carbon (DOC), particulate organic carbon (POC) and particulate nitrogen (PN) of the samples collected from stations in Enteromorpha prolifera outbreak area of the Western South Yellow Sea during the period August 9-13 of 2008, combining with the data of environmental hydrology, the horizontal distribution, source and influential factors of organic carbon and carbon fixed strength of phytoplankton were discussed. The results showed that the concentrations of DOC and POC ranged from 1.55 mg/L to 3.22 mg/L, 0.11 mg/L to 0.68 mg/L, with average values of 2.44 mg/L and 0.27 mg/L. The horizontal distributions of DOC and POC were similar in study area. The concentrations of DOC and POC in coastal area were higher than that in the outer sea and the concentrations of DOC and POC at surface water layer were higher than those at the bottom water layer. There were a positive correlation between POC and TSS, indicating that the concentrations and source of TSS were main factors for the POC. According to the univariate linear regression model between POC and PN, the concentrations of particulate inorganic nitrogen (PIN) were evaluated. Removing the content of PIN in the samples, the average POC/PON values in most coastal waters were less than 8, combining with the values of POC/chlorophyll a, suggesting that the marine primary production were the important source of POC in most coastal waters, and the presence of degraded organic matter which derived from degraded Enteromorph prolifera was in the latter period of green tide outbreak. The results of evaluated carbon fixed strength based on primary productivity showed that carbon fixed strength of phytoplankton in Enteromorpha prolifera outbreak area of the Western South Yellow Sea ranged from 167 mg/(m2 x d) to 2017 mg/(m2 x d), with the average of 730 mg/(m2 x d). The daily carbon fixed quantities of the study area were up to 2.95 x 10(4) t. Then the daily carbon fixed quantities of the Yellow Sea were 28.03 x 10(4) t.
基于对2008年8月9日至13日在南黄海西部浒苔爆发区各站点采集的样品中溶解有机碳（DOC）、颗粒有机碳（POC）和颗粒氮（PN）的分析，并结合环境水文数据，探讨了有机碳的水平分布、来源及影响因素以及浮游植物的碳固定强度。结果表明，DOC和POC浓度范围分别为1.55mg/L至3.22mg/L、0.11mg/L至0.68mg/L，平均值分别为2.44mg/L和0.27mg/L。研究区域内DOC和POC的水平分布相似。近岸区域DOC和POC的浓度高于外海，表层水层DOC和POC的浓度高于底层水层。POC与总悬浮固体（TSS）之间存在正相关关系，表明TSS的浓度和来源是影响POC的主要因素。根据POC与PN之间的一元线性回归模型，对颗粒无机氮（PIN）的浓度进行了评估。去除样品中PIN的含量后，多数近岸海域POC/PON的平均值小于8，结合POC/叶绿素a的值，表明海洋初级生产是多数近岸海域POC的重要来源，且在绿潮爆发后期存在源自浒苔降解的降解有机物。基于初级生产力评估碳固定强度的结果表明，南黄海西部浒苔爆发区浮游植物的碳固定强度范围为167mg/(m²·d)至2017mg/(m²·d)，平均值为730mg/(m²·d)。研究区域的日碳固定量高达2.95×10⁴t。进而推算出黄海的日碳固定量为28.03×10⁴t。
