Back to Search
Start Over
Interactive Effects of Ultraviolet Radiation and Dissolved Organic Carbon on Phytoplankton Growth and Photosynthesis in Sanya Bay, Northern South China Sea
- Source :
- Ocean Science Journal. 54:581-593
- Publication Year :
- 2019
- Publisher :
- Springer Science and Business Media LLC, 2019.
-
Abstract
- The effects of a simulated climate change scenario, i.e., increased ultraviolet radiation (UVR) and dissolved organic carbon (DOC), on the growth and photosynthesis of tropical coastal phytoplankton were evaluated in Sanya Bay, northern South China Sea, in summer. Microcosm experiments were conducted at two contrasting stations (Stns S1 and S2) with three different UVR treatments and two DOC addition treatments. Our results showed that natural sunlight UVR or increased UV-B did not affect phytoplankton biomass and primary production. However, increased UV-B significantly decreased the proportion of picophytoplankton and the efficiency of carbon fixation at Stn S2. DOC enhancement caused negative effects on primary production under natural sunlight UVR only at Stn S1. Interactive effects of UVR and DOC addition on phytoplankton biomass and primary production were detected at Stn S1, due to the negative effects of DOC being eliminated under the increased UV-B condition. The lack of interactive effects at Stn S2 were likely due to the differences with Stn S1 in terms of light acclimation and biological interaction. In summary, this future climate change scenario will probably not affect the photosynthetic CO2 fixation and biomass of natural phytoplankton in Sanya Bay.
- Subjects :
- 0106 biological sciences
Biomass (ecology)
010504 meteorology & atmospheric sciences
010604 marine biology & hydrobiology
Carbon fixation
Oceanography
Photosynthesis
01 natural sciences
Environmental chemistry
Dissolved organic carbon
Climate change scenario
Phytoplankton
Environmental science
Microcosm
Bay
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 20057172 and 17385261
- Volume :
- 54
- Database :
- OpenAIRE
- Journal :
- Ocean Science Journal
- Accession number :
- edsair.doi...........b8b9878b5a50fb410680be73a9cb0fbc