摘要
为研究高CO2及UVR对大型海藻耦合效应的影响,实验选择红藻门可进行钙化的叉节藻(Amphiroa sp.)与绿藻门不具钙化能力的刚毛藻(Cladophora sp.)进行对比,探讨了高CO2与UVR对这两种藻生长及光化学效率的影响,并分析高CO2和UVR的耦合效应。结果表明,CO2浓度由360μmol/mol当前空气中CO2浓度)提高到1000μmol/mol培养73d后,叉节藻的生长下降了40.01%,而刚毛藻却增加了40.08%,UVR对叉节藻的光华学效率造成的抑制率增加了77.76%,对刚毛藻的抑制率增加了17.02%,这说明高CO2引起的海水酸化加剧了UVR对藻体的负面效应,且对具有钙化能力的叉节藻影响更显著。而叉节藻和刚毛藻之间的差异体现了藻体对海水酸化和UVR响应的种间特异性。
Human behaviors contribute to global changes of enhanced solar ultraviolet radiation （UVR, 280-400 nm） and ocean acidification. Macroalgae plays an important role in global carbon cycle as primary producers;however, the effects of ocean acidification and UVR on macroalgae are uncertain. To investigate the combined effects of ocean acidi-fication and UVR on growth and photochemical efficiency, the calcified Amphiroa sp. and non-calcified Cladophora sp. were utilized in the present study. The results showed that increasing CO2 concentration from 360 ppmv （the current CO2 concentration in the air） to 1000 ppmv inhibited the growth of Amphiroa sp. by 40.01%, but stimulated the growth of Cladophora sp. by 40.08%. We also observed that UVR sensitivity was increased with acidification, and that acidifi-cation amplified the effects of elevated CO2 concentration in regulating the growth of algae. This suggested that ocean acidification may increase the negative effect of UVR to algae. These results indicated species-dependent effects of ocean acidification and UVR.
出处
《水生生物学报》
CAS
CSCD
北大核心
2014年第4期636-641,共6页
Acta Hydrobiologica Sinica
基金
广东省海洋生物技术重点实验室开放基金(GPKLMB201205)
国家自然科学基金项目(No.41306106)
浙江省科技厅项目(No.2014F10005)
温州市科技计划项目(S20100019)
浙江省近岸水域生物资源开发与保护重点实验室开放基金(No.J2013001)资助
关键词
叉节藻
刚毛藻
光化学效率
CO2
UVR
Amphiroa sp.
Cladophora sp.
Photochemical efficiency
CO2
UVR
