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| Content Provider | Springer Nature Link |
|---|---|
| Author | Hu, Hanhua Gao, Kunshan |
| Copyright Year | 2008 |
| Abstract | The physiological responses of Nitzschia palea Kützing, a freshwater diatom, to elevated CO2 were investigated and compared with those of a marine diatom, Chaetoceros muelleri Lemmermann previously reported. Elevated CO2 concentration to 700 μl/L increased the dissolved inorganic carbon (DIC) and lowered the pH in the cultures of N. palea, thus enhancing the growth by 4%–20% during the whole growth period. High CO2-grown N. palea cells showed lower levels of dark respiration rates and higher I k values. Light-saturated photosynthetic rates and photosynthetic efficiencies decreased in N. palea with the doubling CO2 concentration in airflow to the bottom of cultures, although the doubling CO2 concentration in airflow to the surface cultures had few effects on these two photosynthetic parameters. N. palea cells were found to be capable of using HCO3− in addition to gaseous CO2, and the CO2 enrichment decreased their affinity for HCO3− and CO2. Although doubled CO2 level would enhance the biomass of N. palea and C. muelleri to different extents, compared with the marine diatom, it had a significant effect on the specific growth rates of N. palea. In addition, the responses of photosynthetic parameters of N. palea to doubled CO2 concentration were almost opposite to those of C. muelleri. |
| Starting Page | 407 |
| Ending Page | 414 |
| Page Count | 8 |
| File Format | |
| ISSN | 02544059 |
| Journal | Chinese Journal of Oceanology and Limnology |
| Volume Number | 26 |
| Issue Number | 4 |
| e-ISSN | 19935005 |
| Language | English |
| Publisher | SP Science Press |
| Publisher Date | 2009-01-23 |
| Publisher Place | Heidelberg |
| Access Restriction | Subscribed |
| Subject Keyword | carbon dioxide Chaetoceros muelleri elevated CO2 growth Nitzschia palea photosynthesis Oceanography |
| Content Type | Text |
| Resource Type | Article |
| Subject | Water Science and Technology Oceanography |
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