The effects of elevated temperature stress on the acquisition and allocation of carbon to lipids in Hawaiian corals
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The Ohio State University / OhioLINK
2013
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=osu1374229960 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-osu13742299602021-08-03T06:18:40Z The effects of elevated temperature stress on the acquisition and allocation of carbon to lipids in Hawaiian corals Baumann, Justin H. Biology Ecology Geochemistry Biological Oceanography Understanding the complex processes of coral response to, and recovery from, bleaching events is central to our ability to predict the impacts of current and future climate change on coral reef ecosystems. Lipids are key biomolecules within the coral holobiont, serving as structural components, as well as significant energy reserves. With the frequency and intensity of bleaching events expected to rise in the coming decades, it is important to understand how coral lipids will be effected by, and recover from, bleaching. A bleaching experiment, followed by carbon pulse-chase labeling, was performed to investigate the assimilation and allocation of carbon to coral host and endosymbiont tissues (including lipids) over the course of bleaching and recovery. Here, we show that bleaching results in a decline in the allocation of photosynthetically derived carbon to lipids in the first month of recovery, but that photosynthetic carbon allocation had fully recovered after 11 months in both Porites compressa and Montipora capitata. In contrast, the allocation of heterotrophic carbon to lipids was no different between bleached and control corals in the first month for both species. While this pattern did not change after 11 months of recovery for M. capitata, dramatically higher enrichment values in the lipids built with heterotrophic carbon of bleached compared to non-bleached control Porites compressa corals were observed. This suggests that either the corals are still recovering, or that they have acclimated and are better able to resist additional bleaching. Overall, P. compressa catabolizes newly synthesized non-lipid energy reserves and maintains newly synthesized lipids. In comparison, M. capitata catabolizes heterotrophic carbon from feeding and catabolizes some of its newly synthesized lipids to meet metabolic demand while maintaining its existing lipid, protein, and carbohydrate reserves. Due to maintenance of total energy reserves and only a small (yet significant) amount of lipid catabolism, it appears that M. capitata recovers faster and may be more resilient to bleaching than P. compressa. 2013-11-05 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1374229960 http://rave.ohiolink.edu/etdc/view?acc_num=osu1374229960 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Biology Ecology Geochemistry Biological Oceanography |
| spellingShingle |
Biology Ecology Geochemistry Biological Oceanography Baumann, Justin H. The effects of elevated temperature stress on the acquisition and allocation of carbon to lipids in Hawaiian corals |
| author |
Baumann, Justin H. |
| author_facet |
Baumann, Justin H. |
| author_sort |
Baumann, Justin H. |
| title |
The effects of elevated temperature stress on the acquisition and allocation of carbon to lipids in Hawaiian corals |
| title_short |
The effects of elevated temperature stress on the acquisition and allocation of carbon to lipids in Hawaiian corals |
| title_full |
The effects of elevated temperature stress on the acquisition and allocation of carbon to lipids in Hawaiian corals |
| title_fullStr |
The effects of elevated temperature stress on the acquisition and allocation of carbon to lipids in Hawaiian corals |
| title_full_unstemmed |
The effects of elevated temperature stress on the acquisition and allocation of carbon to lipids in Hawaiian corals |
| title_sort |
effects of elevated temperature stress on the acquisition and allocation of carbon to lipids in hawaiian corals |
| publisher |
The Ohio State University / OhioLINK |
| publishDate |
2013 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=osu1374229960 |
| work_keys_str_mv |
AT baumannjustinh theeffectsofelevatedtemperaturestressontheacquisitionandallocationofcarbontolipidsinhawaiiancorals AT baumannjustinh effectsofelevatedtemperaturestressontheacquisitionandallocationofcarbontolipidsinhawaiiancorals |
| _version_ |
1719434469586239488 |