摘要
通过模拟大气CO_2浓度升高,研究其对海绵滤食细菌功能的影响。在模拟大气CO_2浓度升高生态系统中,探究了大气CO_2浓度387、500、750和1 000mmol/mol环境下繁茂膜海绵(Hymeniacidon perlevis)滤食灭菌海水中大肠杆菌(Escherichia coli AS 1.1017)和灿烂弧菌(Vibrio splendidus)的能力。结果表明:在24 h实验期间,模拟大气CO_2从目前约387mmol/mol升高至500mmol/mol,繁茂膜海绵滤食大肠杆菌和灿烂弧菌效率提高了。当模拟大气CO_2 750mmol/mol时,繁茂膜海绵滤食海水中大肠杆菌和灿烂弧菌功能都下降了,说明繁茂膜海绵已经受到大气较高浓度CO_2损害。模拟大气CO_2为1 000mmol/mol时,繁茂膜海绵基本丧失了滤食海水中大肠杆菌和灿烂弧菌的功能。上述结果可为了解大气CO_2浓度对近岸海洋生态系统的影响提供科学依据。
The influence of carbon dioxide （CO2） concentration on the capability of Hymeniacidon perlevis fil-ter-feeding bacteria was studied by simulating an elevated atmospheric CO2 concentration. In the simulated ecosys-tem, the capability of H. perlevis filter-feeding Escherichia coli AS 1.1017 and Vibrio splendidus was explored, respectively, in sterilized seawater under 387, 500, 750 and 1 000 μmol/mol. The results showed that the effi-ciency of H. perlevis filter-feeding bacteria was improved when the CO2 concentration elevated from 387 μmol/mol to 500 μmol/mol; however, the capacity of H. perlevis filter-feeding bacteria was decreased when the CO2 concen-tration elevated to 750 μmol/mol . This result indicates that the relatively high CO2 concentration damages the fil-ter-feeding efficiency of H. perlevis, and the efficiency was lost when the CO2 concentration elevated to 1000 μmol/mol. This study provides a scientific basis for predicting the effect of atmospheric CO2 concentration on the coastal ecosystem.
出处
《海洋科学》
CAS
CSCD
北大核心
2017年第7期16-22,共7页
Marine Sciences
基金
“十二五”国家科技支撑计划项目(2015BAD13B05)
辽宁省海洋与渔业厅科研计划项目(201215)
大连海洋大学2012年校列科研项目(2012HYDX09)~~
