Climate change confers a potential advantage to fleshy Antarctic crustose macroalgae over calcified species
Climate change impacts were investigated in two species of crustose Antarctic macroalgae that may be natural competitors in their habitat. The seawater parameters oceanic pH and temperature were modified to near future projections for the western Antarctic Peninsula in microcosm experiments. Experim...
Published in: | Journal of Experimental Marine Biology and Ecology |
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Online Access: | http://eprints.gla.ac.uk/123887/ |
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ftuglasgow:oai:eprints.gla.ac.uk:123887 2023-05-15T14:04:48+02:00 Climate change confers a potential advantage to fleshy Antarctic crustose macroalgae over calcified species Schoenrock, K.M. Schram, Julie B. Amsler, Charles D. McClintock, James B. Angus, Robert A. Vohra, Yogesh K. 2016-01 http://eprints.gla.ac.uk/123887/ unknown Elsevier Schoenrock, K.M. <http://eprints.gla.ac.uk/view/author/34254.html>, Schram, J. B., Amsler, C. D., McClintock, J. B., Angus, R. A. and Vohra, Y. K. (2016) Climate change confers a potential advantage to fleshy Antarctic crustose macroalgae over calcified species. Journal of Experimental Marine Biology and Ecology <http://eprints.gla.ac.uk/view/journal_volume/Journal_of_Experimental_Marine_Biology_and_Ecology.html>, 474, pp. 58-66. (doi:10.1016/j.jembe.2015.09.009 <http://dx.doi.org/10.1016/j.jembe.2015.09.009>) Articles PeerReviewed 2016 ftuglasgow https://doi.org/10.1016/j.jembe.2015.09.009 2020-01-10T01:11:49Z Climate change impacts were investigated in two species of crustose Antarctic macroalgae that may be natural competitors in their habitat. The seawater parameters oceanic pH and temperature were modified to near future projections for the western Antarctic Peninsula in microcosm experiments. Experiments included two crustose algae, the calcified coralline alga Clathromorphum obtectulum and the fleshy encrusting rhodophyte Hildenbrandia sp., and were run for six weeks. Treatments reflected near future ocean conditions under climate change predictions: increased temperature (3.5 °C × pH 8.1), increased pCO2 (1.5 °C × pH 7.8), combined factors (3.5 °C × pH 7.8), and ambient conditions (1.5 °C × pH 8.1). The physiological responses of the algae were evaluated through photosynthetic parameters (slope to saturation of photo centers (α), saturating irradiance (Ek), maximum electron transport rate (ETRmax), maximum quantum yield of photosystem II (Fv/Fm)), growth, chlorophyll a concentration, and for C. obtectulum calcium carbonate content and Mg/Ca ratio. No negative impacts of elevated temperature or increased pCO2 were observed in either species. The fleshy alga decreased in size in low pH and high temperature treatments alone, but increased growth significantly when these factors were combined. Photosynthetic parameters were depressed by increased temperature in the calcified species and pH in the fleshy species but no significant differences were observed in other parameters in either species. This indicates that Hildenbrandia sp. may have a competitive advantage for space in the subtidal environment in near future oceanic conditions. However because benthic ecology in this geographic region is not well understood it is uncertain how these results will ultimately impact the community. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula University of Glasgow: Enlighten - Publications Antarctic Antarctic Peninsula Journal of Experimental Marine Biology and Ecology 474 58 66 |
institution |
Open Polar |
collection |
University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
unknown |
description |
Climate change impacts were investigated in two species of crustose Antarctic macroalgae that may be natural competitors in their habitat. The seawater parameters oceanic pH and temperature were modified to near future projections for the western Antarctic Peninsula in microcosm experiments. Experiments included two crustose algae, the calcified coralline alga Clathromorphum obtectulum and the fleshy encrusting rhodophyte Hildenbrandia sp., and were run for six weeks. Treatments reflected near future ocean conditions under climate change predictions: increased temperature (3.5 °C × pH 8.1), increased pCO2 (1.5 °C × pH 7.8), combined factors (3.5 °C × pH 7.8), and ambient conditions (1.5 °C × pH 8.1). The physiological responses of the algae were evaluated through photosynthetic parameters (slope to saturation of photo centers (α), saturating irradiance (Ek), maximum electron transport rate (ETRmax), maximum quantum yield of photosystem II (Fv/Fm)), growth, chlorophyll a concentration, and for C. obtectulum calcium carbonate content and Mg/Ca ratio. No negative impacts of elevated temperature or increased pCO2 were observed in either species. The fleshy alga decreased in size in low pH and high temperature treatments alone, but increased growth significantly when these factors were combined. Photosynthetic parameters were depressed by increased temperature in the calcified species and pH in the fleshy species but no significant differences were observed in other parameters in either species. This indicates that Hildenbrandia sp. may have a competitive advantage for space in the subtidal environment in near future oceanic conditions. However because benthic ecology in this geographic region is not well understood it is uncertain how these results will ultimately impact the community. |
format |
Article in Journal/Newspaper |
author |
Schoenrock, K.M. Schram, Julie B. Amsler, Charles D. McClintock, James B. Angus, Robert A. Vohra, Yogesh K. |
spellingShingle |
Schoenrock, K.M. Schram, Julie B. Amsler, Charles D. McClintock, James B. Angus, Robert A. Vohra, Yogesh K. Climate change confers a potential advantage to fleshy Antarctic crustose macroalgae over calcified species |
author_facet |
Schoenrock, K.M. Schram, Julie B. Amsler, Charles D. McClintock, James B. Angus, Robert A. Vohra, Yogesh K. |
author_sort |
Schoenrock, K.M. |
title |
Climate change confers a potential advantage to fleshy Antarctic crustose macroalgae over calcified species |
title_short |
Climate change confers a potential advantage to fleshy Antarctic crustose macroalgae over calcified species |
title_full |
Climate change confers a potential advantage to fleshy Antarctic crustose macroalgae over calcified species |
title_fullStr |
Climate change confers a potential advantage to fleshy Antarctic crustose macroalgae over calcified species |
title_full_unstemmed |
Climate change confers a potential advantage to fleshy Antarctic crustose macroalgae over calcified species |
title_sort |
climate change confers a potential advantage to fleshy antarctic crustose macroalgae over calcified species |
publisher |
Elsevier |
publishDate |
2016 |
url |
http://eprints.gla.ac.uk/123887/ |
geographic |
Antarctic Antarctic Peninsula |
geographic_facet |
Antarctic Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_relation |
Schoenrock, K.M. <http://eprints.gla.ac.uk/view/author/34254.html>, Schram, J. B., Amsler, C. D., McClintock, J. B., Angus, R. A. and Vohra, Y. K. (2016) Climate change confers a potential advantage to fleshy Antarctic crustose macroalgae over calcified species. Journal of Experimental Marine Biology and Ecology <http://eprints.gla.ac.uk/view/journal_volume/Journal_of_Experimental_Marine_Biology_and_Ecology.html>, 474, pp. 58-66. (doi:10.1016/j.jembe.2015.09.009 <http://dx.doi.org/10.1016/j.jembe.2015.09.009>) |
op_doi |
https://doi.org/10.1016/j.jembe.2015.09.009 |
container_title |
Journal of Experimental Marine Biology and Ecology |
container_volume |
474 |
container_start_page |
58 |
op_container_end_page |
66 |
_version_ |
1766276135239286784 |