Effects of Ocean Acidification on Primary Production of Marine Macroalgae
Currently global warming and increase in atmospheric CO2 levels are major concerns for our ecosystems. The ocean acidification, the consequence of rising atmospheric CO2, is occurring in synergy with ocean temperature increase and their cumulative impacts or interactive effects may have very signifi...
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Alfred-Wegener Institute for Polar and Marine Research
2010
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ftawi:oai:epic.awi.de:32291 2024-09-15T18:24:09+00:00 Effects of Ocean Acidification on Primary Production of Marine Macroalgae Sarker, Yusuf 2010-08-07 application/pdf https://epic.awi.de/id/eprint/32291/ https://epic.awi.de/id/eprint/32291/1/Sarker_MdYusuf_Msc_Thesis_2010.pdf https://hdl.handle.net/10013/epic.40915 https://hdl.handle.net/10013/epic.40915.d001 unknown Alfred-Wegener Institute for Polar and Marine Research https://epic.awi.de/id/eprint/32291/1/Sarker_MdYusuf_Msc_Thesis_2010.pdf https://hdl.handle.net/10013/epic.40915.d001 Sarker, Y. (2010) Effects of Ocean Acidification on Primary Production of Marine Macroalgae , Master thesis, University of Bremen. hdl:10013/epic.40915 EPIC3Alfred-Wegener Institute for Polar and Marine Research, 69 p. Thesis notRev 2010 ftawi 2024-06-24T04:06:16Z Currently global warming and increase in atmospheric CO2 levels are major concerns for our ecosystems. The ocean acidification, the consequence of rising atmospheric CO2, is occurring in synergy with ocean temperature increase and their cumulative impacts or interactive effects may have very significant consequences for marine life and still are virtually unknown. This will not only change the ecosystem structure but very importantly the basis of the food web, namely the primary production. Marine macroalgae are important functional groups of the world’s coastal ecosystems. Due to their important ecological roles, it is important to understand how the macroalgae will be affected by the changing scenarios. In this master thesis, effects of increased CO2 concentration on Chondrus crispus, a common red alga of the North Atlantic, were investigated through growth experiments conducted in variable irradiance (minimal and optimal) and temperature (optimal and elevated). Productivity and performance of the algae was observed through growth rate and photosynthetic capacity. Change in the biochemical components of the algae was evaluated through C/N analysis and Chlorophyll a analysis. The results from this study showed increased growth of Chondrus crispus in elevated CO2 concentration. The growth difference between low and high CO2 concentration was more pronounced in the elevated temperature. However, this enhancement of growth rate was not attributed to the photosynthetic carbon assimilation of the algae, as photosynthetic rate was not increased in the high CO2 acclimated algae. The growth enhancement in algae was most probably due to the down-regulation of energy consuming CCMs in the elevated CO2 concentration which had been observed in some other macroalgal species as well. Final dry biomass increased significantly in the algae cultured in the high CO2 concentration compared to the low CO2 concentration indicating higher growth in the high CO2 concentration. Significant decrease of Chlorophyll a content was also ... Thesis North Atlantic Ocean acidification Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Currently global warming and increase in atmospheric CO2 levels are major concerns for our ecosystems. The ocean acidification, the consequence of rising atmospheric CO2, is occurring in synergy with ocean temperature increase and their cumulative impacts or interactive effects may have very significant consequences for marine life and still are virtually unknown. This will not only change the ecosystem structure but very importantly the basis of the food web, namely the primary production. Marine macroalgae are important functional groups of the world’s coastal ecosystems. Due to their important ecological roles, it is important to understand how the macroalgae will be affected by the changing scenarios. In this master thesis, effects of increased CO2 concentration on Chondrus crispus, a common red alga of the North Atlantic, were investigated through growth experiments conducted in variable irradiance (minimal and optimal) and temperature (optimal and elevated). Productivity and performance of the algae was observed through growth rate and photosynthetic capacity. Change in the biochemical components of the algae was evaluated through C/N analysis and Chlorophyll a analysis. The results from this study showed increased growth of Chondrus crispus in elevated CO2 concentration. The growth difference between low and high CO2 concentration was more pronounced in the elevated temperature. However, this enhancement of growth rate was not attributed to the photosynthetic carbon assimilation of the algae, as photosynthetic rate was not increased in the high CO2 acclimated algae. The growth enhancement in algae was most probably due to the down-regulation of energy consuming CCMs in the elevated CO2 concentration which had been observed in some other macroalgal species as well. Final dry biomass increased significantly in the algae cultured in the high CO2 concentration compared to the low CO2 concentration indicating higher growth in the high CO2 concentration. Significant decrease of Chlorophyll a content was also ... |
format |
Thesis |
author |
Sarker, Yusuf |
spellingShingle |
Sarker, Yusuf Effects of Ocean Acidification on Primary Production of Marine Macroalgae |
author_facet |
Sarker, Yusuf |
author_sort |
Sarker, Yusuf |
title |
Effects of Ocean Acidification on Primary Production of Marine Macroalgae |
title_short |
Effects of Ocean Acidification on Primary Production of Marine Macroalgae |
title_full |
Effects of Ocean Acidification on Primary Production of Marine Macroalgae |
title_fullStr |
Effects of Ocean Acidification on Primary Production of Marine Macroalgae |
title_full_unstemmed |
Effects of Ocean Acidification on Primary Production of Marine Macroalgae |
title_sort |
effects of ocean acidification on primary production of marine macroalgae |
publisher |
Alfred-Wegener Institute for Polar and Marine Research |
publishDate |
2010 |
url |
https://epic.awi.de/id/eprint/32291/ https://epic.awi.de/id/eprint/32291/1/Sarker_MdYusuf_Msc_Thesis_2010.pdf https://hdl.handle.net/10013/epic.40915 https://hdl.handle.net/10013/epic.40915.d001 |
genre |
North Atlantic Ocean acidification |
genre_facet |
North Atlantic Ocean acidification |
op_source |
EPIC3Alfred-Wegener Institute for Polar and Marine Research, 69 p. |
op_relation |
https://epic.awi.de/id/eprint/32291/1/Sarker_MdYusuf_Msc_Thesis_2010.pdf https://hdl.handle.net/10013/epic.40915.d001 Sarker, Y. (2010) Effects of Ocean Acidification on Primary Production of Marine Macroalgae , Master thesis, University of Bremen. hdl:10013/epic.40915 |
_version_ |
1810464454302760960 |