摘要
为了研究浅海不同海养殖模式对桑沟湾碳酸盐体系的影响,本研究于2019年4月(春季)、7月(夏季)、10月(秋季)、12月(冬季)对桑沟湾养殖区(藻类养殖区、贝藻养殖区、贝鱼养殖区和贝类养殖区)及毗连自然海域(外海区)进行了调查监测,分析了海水的温度、盐度、pH、溶解氧、总碱度(TA)、溶解性无机碳(DIC)和二氧化碳分压(pCO2)的时空分布特征,并计算出海-气界面CO2通量FCO2值.结果表明,桑沟湾藻类养殖区的碳酸盐体系主要受到藻类光合作用和外海海水交换的影响.贝类养殖区的碳酸盐体系受到贝类呼吸和钙化作用的双重影响,由于桑沟湾贝类养殖区FCO2为负值,为CO2汇区,这可能是由于贝类的钙化作用强于呼吸作用所导致的.春、夏、秋、冬季桑沟湾养殖区的FCO2分别为-66.60±16.82、-52.44±21.66、-74.00±11.45 和-92.65±34.13 mmol·m-2·d-1,均为CO2的汇.桑沟湾碳酸盐体系会受到养殖活动的影响,并且不同的养殖模式之间存在显著差异.研究结果对于科学评估桑沟湾养殖区与毗连自然海域的CO2源/汇过程具有重要意义.
Abstract
In order to investigate the influence of various aquaculture mode on the carbonate system in Sanggou bay,a field survey,including seaweed,shellfish-seaweed,shellfish-fish and shellfish culture,was conducted in the open sea area in Sanggou bay in April,July,October and December,2019.Temperature,salinity,pH,dissolved oxygen,total alkalinity(TA),dissolved inorganic carbon(DIC)and partial pressure of carbon diox-ide(pCO2)were analyzed.In addition,the air-sea carbon dioxide flux(FCO2)was calculated.The results showed that the main influencing factors of carbonate system in Sanggou bay algae culture area were algae growth and offshore seawater exchange.The carbonate system in the shellfish culture area was affected by both shellfish respiration and calcification.Because of the FCO2 in Sanggou bay shellfish culture area was negative and was a CO2 sink area,the calcification of shellfish in this area could be stronger than respiration.The FCO2 of Sanggou bay aquaculture area in spring,summer,autumn and winter were-66.60±16.82,-52.44±21.66,-74.00±11.45 and-92.65±34.13 mmol·m-2·d-1 respectively,indicating that they were the sink of CO2.The carbonate system in Sanggou bay was affected by aquaculture action,and there were significant differences among different aquaculture modes.
基金项目
国家重点研发计划"蓝色粮仓科技创新"重点专项(2018YFD0900703)
中国水产科学研究院基本科研业务费资助项目(2023TD13)
山东省泰山学者专项(tsqn202211267)
NETL
NSTL
万方数据