| 摘要: |
| 2011年8月、10月、12月和2012年4月对大连獐子岛养殖海域共14个站位进行了大面调查。对其中颗粒有机碳(POC)和颗粒氮(PN)的时空分布特征进行了研究。结果表明, 獐子岛养殖海域水体中POC质量浓度的季节变化趋势是: 夏季＞秋季＞春季＞冬季。夏季POC质量浓度最高, 表、底层的质量浓度分别为0.159～1.672 mg/L和0.045～0.834 mg/L, 平均值分别为(0.867±0.451) mg/L 和(0.319±0.204) mg/L。冬季表、底层POC质量浓度最低, 表、底层POC质量浓度分别为0.020～0.530 mg/L和0.061~0.458 mg/L。平均值分别为(0.240±0.125) mg/L和(0.221±0.129) mg/L。四个季节的POC质量浓度平面分布较为均匀。PN质量浓度的季节变化趋势是: 夏季＞秋季＞冬季＞春季。夏季PN的质量浓度最高, 表、底层PN的质量浓度分别为0.026～0.439 mg/L和0.020～0.393 mg/L, 平均值分别为(0.193±0.067) mg/L和(0.172±0.060) mg/L。春季表、底层PN质量浓度最低, 表、底层PN 质量浓度分别为0.059～0.178 mg/L和0.024～0.212 mg/L, 平均值分别为(0.120±0.047) mg/L和(0.100±0.050) mg/L。PN与POC的分布特征相似, 空间分布均匀。叶绿素a(Chl-a)质量浓度的变化趋势为: 夏季＞秋季＞春季＞冬季。POC、PN和Chl-a的垂直分布规律相似, 春季底层质量浓度高于表层, 夏秋两季表层质量浓度高于底层, 冬季表、底层质量浓度基本一致。根据C/N以及POC/Chl-a的比值对POC的来源进行初步分析, 表明该海域的POC主要来源于海洋生物, 并且受陆源的影响较小。 |
| 关键词: 獐子岛 颗粒有机碳 颗粒氮 分布特征 |
| DOI：10.11759/hykx20160105001 |
| 分类号: |
| 基金项目:国家自然科学基金项目(31302193); 黄海水产研究所级基本科研业务费(20603022015017-3, 20603022015017-2, 20603022011003);公益性行业(农业)科研专项 (201203017) |
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| Spatial-temporal distribution of particulate organic carbon and particulate nitrogen in the mariculture areas of Zhangzhi Island |
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LIU Yi,ZHANG Ji-hong,DU Mei-rong,LIN Fan,DING Gang,WU Wen-guang,FANG Jing-hui
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| Abstract: |
| Several cruises have been conducted on the Zhangzi island aquaculture region, with 14 stations, in August, October, and December 2011 and April 2012. Hydrography data on particle organic carbon (POC) and particulate nitrogen (PN) was collected, and the spatial–temporal distribution of the data was studied and analyzed. The results showed that variation in concentration of POC is in the following order: summer > autumn > spring > winter. The POC concentration in summer tends to be the highest, with a variation from 0.159 to 1.672 mg/L and 0.045 to 0.834 mg/L for surface and bottom water, respectively; the average POC concentration for the surface is (0.867 ± 0.451) mg/L and for bottom is (0.319 ± 0.204) mg/L. In winter, the bottom POC concentration reaches a minimum, and the range and average concentration for surface water is 0.020～0.530 mg/L and (0.240 ± 0.125) mg/L, respectively, and for the bottom water is 0.061～0.458 mg/L and and (0.221 ± 0.129) mg/L, respectively. The horizontal distribution of POC concentration tends to be homogenized for each season. The variation in PN concentration is as follows: summer > winter > autumn > spring. Similar to POC, the PN concentration in summer tends to be the highest with a range and average value of 0.026～0.439 mg/L and (0.193 ± 0.067) mg/L, respectively, for surface water, and 0.020～0.393 mg/L and (0.172 ± 0.060) mg/L, respectively, for bottom water. The minimum concentration of PN tends to appear in spring and the range and average are 0.059～0.178 mg/L and (0.120 ± 0.047) mg/L, respectively, for surface water, and 0.020～0.393 mg/L and (0.100 ± 0.050) mg/L, respectively, for bottom water. The PN concentration exhibits a spatial homogenized distribution similar to that of POC. The temporal distribution of concentration of Chl-a is as follows: summer > autumn > spring > winter. Vertical distributions for POC, PN, and Chl-a shows some similarities. The concentration of bottom water is slightly higher than that of surface water in the spring, and much higher surface concentrations can be observed relative to bottom water concentrations in summer and autumn. In winter, the concentrations in surface and bottom water tend to be similar. With the analysis of C/N and the ratio of POC to Chl-a (in concentration) the source of POC for the study region is discussed, and the source of the POC near Zhangzi island is concluded to primarily originate from marine organisms, not much terrigenous sediments. |
| Key words: Zhangzi Island Particulate Organic Carbon Particulate Nitrogen Distribution |
