Effects of elevated nutrients and CO2 emission scenarios on three coral reef macroalgae
Coral reef macroalgae are expected to thrive in the future under conditions that are deleterious to the health of reef-building corals. Here we examined how macroalgae would be affected by exposure to future CO emission scenarios (pCO and temperature), enriched nutrients and combinations of both. Th...
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:582741 2023-05-15T17:51:30+02:00 Effects of elevated nutrients and CO2 emission scenarios on three coral reef macroalgae Bender-Champ, Dorothea Diaz-Pulido, Guillermo Dove, Sophie 2017-05-01 https://espace.library.uq.edu.au/view/UQ:582741 eng eng Elsevier BV doi:10.1016/j.hal.2017.04.004 issn:1878-1470 issn:1568-9883 orcid:0000-0002-1279-7091 orcid:0000-0003-1823-8634 LP0775303 LP0989845 0561435 Not set Carbon-concentrating mechanism Climate change Coral reefs Eutrophication Macroalgae Ocean acidification Phase-shift 1104 Aquatic Science 1110 Plant Science Journal Article 2017 ftunivqespace https://doi.org/10.1016/j.hal.2017.04.004 2020-12-08T01:37:04Z Coral reef macroalgae are expected to thrive in the future under conditions that are deleterious to the health of reef-building corals. Here we examined how macroalgae would be affected by exposure to future CO emission scenarios (pCO and temperature), enriched nutrients and combinations of both. The species tested, Laurencia intricata (Rhodophyta), Turbinaria ornata and Chnoospora implexa (both Phaeophyceae), have active carbon-concentrating mechanisms but responded differently to the treatments. L. intricata showed high mortality under nutrient enriched RCP4.5 ("reduced" CO emission) and RCP8.5 ("business-as-usual" CO emission) and grew best under pre-industrial (PI) conditions, where it could take up carbon using external carbonic anhydrase combined, potentially, with proton extrusion. T. ornata's growth rate showed a trend for reduction under RCP8.5 but was unaffected by nutrient enrichment. In C. implexa, highest growth was observed under PI conditions, but highest net photosynthesis occurred under RCP8.5, suggesting that under RCP8.5, carbon is stored and respired at greater rates while it is directed to growth under PI conditions. None of the species showed growth enhancement under future scenarios, nutrient enrichment or combinations of both. This leads to the conclusion that under such conditions these species are unlikely to pose an increasing threat to coral reefs. Article in Journal/Newspaper Ocean acidification The University of Queensland: UQ eSpace Harmful Algae 65 40 51 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Carbon-concentrating mechanism Climate change Coral reefs Eutrophication Macroalgae Ocean acidification Phase-shift 1104 Aquatic Science 1110 Plant Science |
spellingShingle |
Carbon-concentrating mechanism Climate change Coral reefs Eutrophication Macroalgae Ocean acidification Phase-shift 1104 Aquatic Science 1110 Plant Science Bender-Champ, Dorothea Diaz-Pulido, Guillermo Dove, Sophie Effects of elevated nutrients and CO2 emission scenarios on three coral reef macroalgae |
topic_facet |
Carbon-concentrating mechanism Climate change Coral reefs Eutrophication Macroalgae Ocean acidification Phase-shift 1104 Aquatic Science 1110 Plant Science |
description |
Coral reef macroalgae are expected to thrive in the future under conditions that are deleterious to the health of reef-building corals. Here we examined how macroalgae would be affected by exposure to future CO emission scenarios (pCO and temperature), enriched nutrients and combinations of both. The species tested, Laurencia intricata (Rhodophyta), Turbinaria ornata and Chnoospora implexa (both Phaeophyceae), have active carbon-concentrating mechanisms but responded differently to the treatments. L. intricata showed high mortality under nutrient enriched RCP4.5 ("reduced" CO emission) and RCP8.5 ("business-as-usual" CO emission) and grew best under pre-industrial (PI) conditions, where it could take up carbon using external carbonic anhydrase combined, potentially, with proton extrusion. T. ornata's growth rate showed a trend for reduction under RCP8.5 but was unaffected by nutrient enrichment. In C. implexa, highest growth was observed under PI conditions, but highest net photosynthesis occurred under RCP8.5, suggesting that under RCP8.5, carbon is stored and respired at greater rates while it is directed to growth under PI conditions. None of the species showed growth enhancement under future scenarios, nutrient enrichment or combinations of both. This leads to the conclusion that under such conditions these species are unlikely to pose an increasing threat to coral reefs. |
format |
Article in Journal/Newspaper |
author |
Bender-Champ, Dorothea Diaz-Pulido, Guillermo Dove, Sophie |
author_facet |
Bender-Champ, Dorothea Diaz-Pulido, Guillermo Dove, Sophie |
author_sort |
Bender-Champ, Dorothea |
title |
Effects of elevated nutrients and CO2 emission scenarios on three coral reef macroalgae |
title_short |
Effects of elevated nutrients and CO2 emission scenarios on three coral reef macroalgae |
title_full |
Effects of elevated nutrients and CO2 emission scenarios on three coral reef macroalgae |
title_fullStr |
Effects of elevated nutrients and CO2 emission scenarios on three coral reef macroalgae |
title_full_unstemmed |
Effects of elevated nutrients and CO2 emission scenarios on three coral reef macroalgae |
title_sort |
effects of elevated nutrients and co2 emission scenarios on three coral reef macroalgae |
publisher |
Elsevier BV |
publishDate |
2017 |
url |
https://espace.library.uq.edu.au/view/UQ:582741 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
doi:10.1016/j.hal.2017.04.004 issn:1878-1470 issn:1568-9883 orcid:0000-0002-1279-7091 orcid:0000-0003-1823-8634 LP0775303 LP0989845 0561435 Not set |
op_doi |
https://doi.org/10.1016/j.hal.2017.04.004 |
container_title |
Harmful Algae |
container_volume |
65 |
container_start_page |
40 |
op_container_end_page |
51 |
_version_ |
1766158672030859264 |