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| Content Provider | frontiers |
|---|---|
| Author | Liu, Cheng-Yue Zhang, Fang Sun, You-Fang Yu, Xiao-Lei Huang, Hui |
| Abstract | In the foreseeable future, coastal coral reef ecosystems are likely to face further increases in eutrophication. Lipids and fatty acids (FAs), as important components of corals, are becoming a hot topic to study the effects of eutrophication on corals. This study investigated the effects of nitrate (NO3-) enrichment (0, 5, 10, 20, and 40 μM) on the respiration, photosynthesis, and FA compositions of Pocillopora damicornis larvae. Our results showed that saturated fatty acids (SFAs) were the most abundant in P. damicornis larvae over all treatment groups, followed by polyunsaturated fatty acids (PUFAs). The unsaturated to saturated fatty acid ratio (U/S) and unsaturation index (UI) reduced at low nitrate concentrations (20 μM). The UI and U/S levels were elevated due to the increased PUFAs levels and decreased SFA levels at higher nitrate concentrations. Compared with the N5 and N10 groups, the fluidity of the biomembrane of the larvae did not continue to decrease but instead increased at higher nitrate concentrations, indicating that the biomembrane restructuring in the larvae may have become ineffective. Moreover, respiration increased and the consumption of numerous lipids led to a significant decrease in TFAs. These could adversely affect the dispersal, settlement, and development of larvae. Overall, P. damicornis larvae can adapt to low levels of nitrate (< 10 μM) due to biomembrane restructuring through changes in FA composition. However, negative effects occur in larvae when nitrate exceeds 20 μM. |
| ISSN | 22967745 |
| DOI | 10.3389/fmars.2020.00531 |
| Volume Number | 7 |
| Journal | Frontiers in Marine Science |
| Language | English |
| Publisher Date | 2020-07-07 |
| Access Restriction | Open |
| Subject Keyword | Respiration Photosynthesis Biomembrane restructuring Fatty acid composition Nitrate enrichment Pocillopora damicornis larvae |
| Content Type | Text |
| Resource Type | Article |
| Subject | Global and Planetary Change Oceanography Ocean Engineering Aquatic Science Water Science and Technology |
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