Interaction Effects of Ocean Acidification and Warming on the Fecundity of the Marine Copepod Calanus finmarchicus
This study provides the first information on the combined effect of ocean acidification and elevated temperature on the fecundity of the marine pelagic copepod Calanus finmarchicus (Gunnerus, 1770). The copepod is considered to have a key role in the transfer of planktonic production to fish, seabir...
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Online Access: | http://hdl.handle.net/11250/245455 |
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/245455 2023-05-15T15:47:56+02:00 Interaction Effects of Ocean Acidification and Warming on the Fecundity of the Marine Copepod Calanus finmarchicus Hanssen, Anja Elise Jenssen, Bjørn Munro Pedersen, Sindre Norges teknisk-naturvitenskapelige universitet, Fakultet for naturvitenskap og teknologi, Institutt for biologi 2014 http://hdl.handle.net/11250/245455 eng eng Institutt for biologi 733660 ntnudaim:10464 http://hdl.handle.net/11250/245455 80 Master thesis 2014 ftntnutrondheimi 2019-09-17T06:49:10Z This study provides the first information on the combined effect of ocean acidification and elevated temperature on the fecundity of the marine pelagic copepod Calanus finmarchicus (Gunnerus, 1770). The copepod is considered to have a key role in the transfer of planktonic production to fish, seabirds and marine mammals, and is stated as a key species in the North Atlantic food web and ecosystem. To obtain a better understanding of the links between physical forcing and the population dynamics of C. finmarchicus in order to predict responses to climate change, it is fundamental to observe the reproduction, which sets the upper limit on recruitment. To study interactive effects of elevated pCO2 and temperature, ovigerous females (that had developed from eggs under the same conditions) were incubated at 380 ppm(ambient) and 2080 ppm (future predictions), and temperatures at 11 and 14˚C in a 2x2 factorial design. A significant reduction in hatching success (75%) and egg production (79%) was observed in the warming treatment alone (+3˚C) compared to the ambient treatment, and a positive antagonistic effect of acidification was when combined with warming. No significant interaction was seen in the lipid storage; however, temperature alone caused a significant reduction (95%). The body volume and the sex ratio were affected by elevated pCO2 and temperature combined or separately. Combined, the observed effects suggest that C. finmarchicus may be robust to future predicted conditions. Master Thesis Calanus finmarchicus North Atlantic Ocean acidification NTNU Open Archive (Norwegian University of Science and Technology) |
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Open Polar |
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NTNU Open Archive (Norwegian University of Science and Technology) |
op_collection_id |
ftntnutrondheimi |
language |
English |
description |
This study provides the first information on the combined effect of ocean acidification and elevated temperature on the fecundity of the marine pelagic copepod Calanus finmarchicus (Gunnerus, 1770). The copepod is considered to have a key role in the transfer of planktonic production to fish, seabirds and marine mammals, and is stated as a key species in the North Atlantic food web and ecosystem. To obtain a better understanding of the links between physical forcing and the population dynamics of C. finmarchicus in order to predict responses to climate change, it is fundamental to observe the reproduction, which sets the upper limit on recruitment. To study interactive effects of elevated pCO2 and temperature, ovigerous females (that had developed from eggs under the same conditions) were incubated at 380 ppm(ambient) and 2080 ppm (future predictions), and temperatures at 11 and 14˚C in a 2x2 factorial design. A significant reduction in hatching success (75%) and egg production (79%) was observed in the warming treatment alone (+3˚C) compared to the ambient treatment, and a positive antagonistic effect of acidification was when combined with warming. No significant interaction was seen in the lipid storage; however, temperature alone caused a significant reduction (95%). The body volume and the sex ratio were affected by elevated pCO2 and temperature combined or separately. Combined, the observed effects suggest that C. finmarchicus may be robust to future predicted conditions. |
author2 |
Jenssen, Bjørn Munro Pedersen, Sindre Norges teknisk-naturvitenskapelige universitet, Fakultet for naturvitenskap og teknologi, Institutt for biologi |
format |
Master Thesis |
author |
Hanssen, Anja Elise |
spellingShingle |
Hanssen, Anja Elise Interaction Effects of Ocean Acidification and Warming on the Fecundity of the Marine Copepod Calanus finmarchicus |
author_facet |
Hanssen, Anja Elise |
author_sort |
Hanssen, Anja Elise |
title |
Interaction Effects of Ocean Acidification and Warming on the Fecundity of the Marine Copepod Calanus finmarchicus |
title_short |
Interaction Effects of Ocean Acidification and Warming on the Fecundity of the Marine Copepod Calanus finmarchicus |
title_full |
Interaction Effects of Ocean Acidification and Warming on the Fecundity of the Marine Copepod Calanus finmarchicus |
title_fullStr |
Interaction Effects of Ocean Acidification and Warming on the Fecundity of the Marine Copepod Calanus finmarchicus |
title_full_unstemmed |
Interaction Effects of Ocean Acidification and Warming on the Fecundity of the Marine Copepod Calanus finmarchicus |
title_sort |
interaction effects of ocean acidification and warming on the fecundity of the marine copepod calanus finmarchicus |
publisher |
Institutt for biologi |
publishDate |
2014 |
url |
http://hdl.handle.net/11250/245455 |
genre |
Calanus finmarchicus North Atlantic Ocean acidification |
genre_facet |
Calanus finmarchicus North Atlantic Ocean acidification |
op_source |
80 |
op_relation |
733660 ntnudaim:10464 http://hdl.handle.net/11250/245455 |
_version_ |
1766382908235317248 |