桑沟湾水域叶绿素a在海带收获前后的变化及其影响因素  

Variation of Chl. a concentration and its control factors pre-and-post-the-harvest of kelp in Sanggou Bay

作　　者：吴文广[1] 张继红[1] 王巍[1] 房景辉[1] 刘毅[1] 牛亚丽[1] 高振锟 

机构地区：[1]中国水产科学研究院黄海水产研究所,农业部海洋渔业可持续发展重点实验室,山东青岛266071

出　　处：《水产学报》2015年第8期1178-1186,共9页Journal of Fisheries of China

基　　金：贝藻养殖的固碳潜力与调控因子研究(2014A01YY01);“十二五”国家科技支撑计划(2011BAD13B06);国家自然科学基金(41276172)

摘　　要：依据2014年5月和8月2个航次走航和定点连续调查资料,分析了桑沟湾水域叶绿素a的空间分布及海带养殖区叶绿素a（Chl.a）的昼夜变化特征,同时结合所调查的温度、盐度、p H和营养盐等分布特征,分析了桑沟湾水域Chl.a浓度与理化因子的关系,探讨了海带收获前后Chl.a的变化及其影响因素。（1）走航调查的结果显示,桑沟湾夏季Chl.a浓度显著高于春季。桑沟湾春季表、底层总Chl.a浓度均值分别为（0.67±0.39）和（0.50±0.31）μg/L,表层Chl.a浓度高于底层,春季表层整体表现出自湾内向湾外逐渐降低的趋势;夏季表、底层总Chl.a浓度均值分别为（3.39±1.53）和（3.12±1.43）μg/L,表层Chl.a浓度高于底层。桑沟湾夏季表层Chl.a高值区出现在海带养殖区,低值区出现在贝类养殖区,夏季底层Chl.a高值区出现在贝类和海带养殖区,低值区出现在外海区。（2）定点连续监测结果显示,春季海带养殖区Chl.a浓度变化范围在0.24~0.95μg/L,均值为（0.70±0.19）μg/L,昼夜波动较小。而夏季海带养殖区Chl.a浓度变化范围在2.01~4.66μg/L,均值为（3.04±0.82）μg/L,昼夜波动较大。桑沟湾海带养殖区夏季Chl.a浓度显著高于春季。春季海带养殖区营养盐平均浓度及硅磷比、氮磷、硅氮比均显著低于夏季。（3）桑沟湾春季表层Chl.a浓度主要与温度、硅酸盐呈显著正相关,而夏季底层Chl.a浓度与盐度呈显著正相关。桑沟湾海带收获前后Chl.a的变化及分布受温度、硅酸盐、盐度、养殖环境状况和水文环境的共同影响,多元的贝藻养殖模式是影响Chl.a变化及分布的重要因素。Two sampling transects for chlorophyll a（ Chl. a） between inner bay and the mouth of bay were performed and one sampling station in kelp zone was daily sampled once every 2 hours in M ay and August,2014 in Sanggou Bay. The spatial distribution and diurnal variation characteristics of Chl. a were studied,and the correlations between Chl. a concentration and physical and chemical factors were analyzed by combining with the environmental factors such as temperature,salt,p H,nutrients and so on in Sanggou Bay,the change of Chl. a and its influencing factor were discussed pre-and-post-the-harvest of kelp in Sanggou Bay.（ 1） For the voyage survey,Chl. a concentration was significantly higher in summer than in spring in Sanggou Bay. In spring,the average Chl. a concentration in the surface layer and the bottom layer were 0. 67 ± 0. 39 μg / L,0. 50 ± 0. 31 μg / L,respectively,and Chl. a concentration was higher in the surface layer than in the bottom layer. The general trend of Chl. a concentration was decreasing from inner bay to the outside of the bay in surface layer in spring. In summer,the average Chl. a concentrations in the surface layer and the bottom layer were 3. 39 ± 1. 53 μg / L and 3. 12 ± 1. 43 μg / L,respectively,and Chl. a concentration was higher in the surface layer than in the bottom layer. The kelp area showed the highest values Chl. a concentrations and shellfish area showed the lowest values in the surface layer in summer. The kelp area and shellfish area showed the highest values Chl. a concentrations and outer site of the bay showed the lowest values in the bottom layer in summer.（ 2） The results of continuous observation showed that Chl. a concentration was in the range of 0. 24- 0. 95 μg / L,and the average value were 0. 70 ± 0. 19 μg / L in spring in kelp zone.There was less fluctuation for Chl. a concentration day and night in spring. In summer,Chl. a concentration was in the range of 2. 01- 4. 66 μg / L,and the average value were 3. 04 ± 0. 82 μg / L in kelp zone. Th

关 键 词：叶绿素A 海带区 温度 营养盐 桑沟湾 

分 类 号：S931.1[农业科学—渔业资源]