Effects of salinity, carbonate alkalinity, and pH on physiological indicators of nutrition transporter for potential habitat restoration of amphipod Eogammarus possjeticus  

作　　者：XUE Suyan MAO Yuze WANG Jinye FANG Jianguang ZHAO Fazhen 

机构地区：[1]Key Laboratory of Sustainable Development of Marine Fisheries,Ministry of Agriculture,Shandong Provincial Key Laboratory of Fishery Resources and Eco-environment,Yellow Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Qingdao 266071,China [2]Laboratory for Marine Ecology and Environmental Science,Pilot National Laboratory for Marine Science and Technology,Qingdao 266071,China [3]College of Marine Science and Engineering,Qingdao Agriculture University,Qingdao 266109,China

出　　处：《Journal of Oceanology and Limnology》2020年第6期1925-1935,共11页海洋湖沼学报（英文）

基　　金：Supported by the Youth Talent Support Program of the Laboratory for Marine Ecology and Environmental Science,Pilot National Laboratory for Marine Science and Technology(Qingdao)(No.LMEESYTSP-2018-04-02);the Creative Team Project of the Laboratory for Marine Ecology and Environmental Science,Pilot National Laboratory for Marine Science and Technology(Qingdao)(No.LMEES-CTSP-2018-4);the Central Public-interest Scientific Institution Basal Research Fund,CAFS(No.2020TD50);the Central Public-interest Scientific Institution Basal Research Fund,YSFRI,CAFS(No.20603022018003)。

摘　　要：The effects of three environmental factors,salinity,carbonate alkalinity,and pH,on the survival,feeding,and respiratory metabolism of Eogammarus possjeticus(Amphipoda:Gammaridae)were investigated experimentally.The results show that E.possjeticus could tolerate a broad salinity range.The 24-h lowest median lethal salinity was 2.70,and the highest was 47.33.The 24-h median lethal alkalinity and pH were 23.05 mmol/L and 9.91,respectively;both values decreased gradually with time.Different values of salinity,carbonate alkalinity,and pH resulted in significant differences in the cumulative mortality(P<0.05).The ingestion rate and feed absorption efficiency were significantly affected by the coupling of the three environmental factors(P<0.05).With increases in carbonate alkalinity,salinity,and pH,both ingestion rate and feed absorption efficiency exhibited a downward trend,indicating a decline in feeding ability under high salinity and more alkaline water conditions.The coupling of salinity,carbonate alkalinity,and pH also had a significant effect on respiration and excretion(P<0.05).The oxygen consumption rate increased first and then decreased with increasing carbonate alkalinity.Under the same carbonate alkalinity values,the oxygen consumption rate increased with increasing salinity.Under the same carbonate alkalinity and salinity,the oxygen consumption rate initially increased and then decreased with increasing pH.The O:N ratio first increased and then decreased with increasing carbonate alkalinity.When carbonate alkalinity was less than 6 mmol/L,the O:N ratio increased with increasing salinity and decreased with increasing pH.The results demonstrate that changes in salinity,carbonate alkalinity,and pH had a measurable impact on the osmotic pressure equilibrium in E.possjeticus and affected the energy supply mode(i.e.ratio of metabolic substrate).

关 键 词：Eogammarus possjeticus saline and alkaline water survival FEEDING respiratory metabolism 

分 类 号：Q958[生物学—动物学]