The developmental responses of two closely related species of sand dollars, the tropical Arachnoides placenta, and the temperate, Fellaster zelandiae, to varied seawater temperature and pH
Two of the major climate change factors expected to effect marine life, in the near future are changes in seawater temperature and pH. The Intergovernmental Panel on Climate Change, IPCC, assessment report from 2013 predicts a pH drop between 0.14 and 0.35 pH units from the current average of 8.1 in...
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ftunivotagoour:oai:ourarchive.otago.ac.nz:10523/5438 2023-05-15T17:50:58+02:00 The developmental responses of two closely related species of sand dollars, the tropical Arachnoides placenta, and the temperate, Fellaster zelandiae, to varied seawater temperature and pH Rivera, Colette Ana Lamare, Miles 2015-01-24T21:50:24Z application/pdf http://hdl.handle.net/10523/5438 en eng University of Otago http://hdl.handle.net/10523/5438 All items in OUR Archive are provided for private study and research purposes and are protected by copyright with all rights reserved unless otherwise indicated. Arachnoides placenta Fellaster zelandiae ocean acidification climate change pH seawater temperature sand dollar development embryology fertilisation morphometrics Thesis or Dissertation 2015 ftunivotagoour 2022-05-11T19:17:37Z Two of the major climate change factors expected to effect marine life, in the near future are changes in seawater temperature and pH. The Intergovernmental Panel on Climate Change, IPCC, assessment report from 2013 predicts a pH drop between 0.14 and 0.35 pH units from the current average of 8.1 in the next century, which is significant over that time period. The IPCC also predicts a global average increase in sea surface temperature of 1oC to 3oC. Many studies of these future changes have been shown to negatively impact marine invertebrates, especially calcifying organisms, through their survival, calcification, abundance, growth, and development. Echinoderm larvae are among the organisms most negatively impacted by ocean acidification. Though many single stressor studies have been preformed on a wide range of organisms, and echinoderm species, much less is know about the effects of multiple stressors. Here, two closely related echinoid species, one tropical Arachnoides placenta, and one temperate Fellaster zelandiae, are tested under the combine stressors of reduced pH and increased temperature. This study found that fertilisation was impacted by an interaction between the two stressors, and embryological and larval morphometrics are likely to be impacted by near future warming, with a negative interactive effect with pH to A. placenta, and possible beneficial effect for the F. zelandiae population studied. Both survival and embryological development are not likely to be negatively impacted by future changes in pH and temperature. Finally, both A. placenta and F. zelandiae have the potential to acclimate to moderate increases in sea surface temperature, as long as evidence of acclimation is observed among current populations residing in thermally variant habitats. Thesis Ocean acidification University of Otago: Research Archive (OUR Archive) |
institution |
Open Polar |
collection |
University of Otago: Research Archive (OUR Archive) |
op_collection_id |
ftunivotagoour |
language |
English |
topic |
Arachnoides placenta Fellaster zelandiae ocean acidification climate change pH seawater temperature sand dollar development embryology fertilisation morphometrics |
spellingShingle |
Arachnoides placenta Fellaster zelandiae ocean acidification climate change pH seawater temperature sand dollar development embryology fertilisation morphometrics Rivera, Colette Ana The developmental responses of two closely related species of sand dollars, the tropical Arachnoides placenta, and the temperate, Fellaster zelandiae, to varied seawater temperature and pH |
topic_facet |
Arachnoides placenta Fellaster zelandiae ocean acidification climate change pH seawater temperature sand dollar development embryology fertilisation morphometrics |
description |
Two of the major climate change factors expected to effect marine life, in the near future are changes in seawater temperature and pH. The Intergovernmental Panel on Climate Change, IPCC, assessment report from 2013 predicts a pH drop between 0.14 and 0.35 pH units from the current average of 8.1 in the next century, which is significant over that time period. The IPCC also predicts a global average increase in sea surface temperature of 1oC to 3oC. Many studies of these future changes have been shown to negatively impact marine invertebrates, especially calcifying organisms, through their survival, calcification, abundance, growth, and development. Echinoderm larvae are among the organisms most negatively impacted by ocean acidification. Though many single stressor studies have been preformed on a wide range of organisms, and echinoderm species, much less is know about the effects of multiple stressors. Here, two closely related echinoid species, one tropical Arachnoides placenta, and one temperate Fellaster zelandiae, are tested under the combine stressors of reduced pH and increased temperature. This study found that fertilisation was impacted by an interaction between the two stressors, and embryological and larval morphometrics are likely to be impacted by near future warming, with a negative interactive effect with pH to A. placenta, and possible beneficial effect for the F. zelandiae population studied. Both survival and embryological development are not likely to be negatively impacted by future changes in pH and temperature. Finally, both A. placenta and F. zelandiae have the potential to acclimate to moderate increases in sea surface temperature, as long as evidence of acclimation is observed among current populations residing in thermally variant habitats. |
author2 |
Lamare, Miles |
format |
Thesis |
author |
Rivera, Colette Ana |
author_facet |
Rivera, Colette Ana |
author_sort |
Rivera, Colette Ana |
title |
The developmental responses of two closely related species of sand dollars, the tropical Arachnoides placenta, and the temperate, Fellaster zelandiae, to varied seawater temperature and pH |
title_short |
The developmental responses of two closely related species of sand dollars, the tropical Arachnoides placenta, and the temperate, Fellaster zelandiae, to varied seawater temperature and pH |
title_full |
The developmental responses of two closely related species of sand dollars, the tropical Arachnoides placenta, and the temperate, Fellaster zelandiae, to varied seawater temperature and pH |
title_fullStr |
The developmental responses of two closely related species of sand dollars, the tropical Arachnoides placenta, and the temperate, Fellaster zelandiae, to varied seawater temperature and pH |
title_full_unstemmed |
The developmental responses of two closely related species of sand dollars, the tropical Arachnoides placenta, and the temperate, Fellaster zelandiae, to varied seawater temperature and pH |
title_sort |
developmental responses of two closely related species of sand dollars, the tropical arachnoides placenta, and the temperate, fellaster zelandiae, to varied seawater temperature and ph |
publisher |
University of Otago |
publishDate |
2015 |
url |
http://hdl.handle.net/10523/5438 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://hdl.handle.net/10523/5438 |
op_rights |
All items in OUR Archive are provided for private study and research purposes and are protected by copyright with all rights reserved unless otherwise indicated. |
_version_ |
1766157914875101184 |