Porites coral response to an oceanographic and human impact gradient in the Line Islands
Coral bleaching caused by heat stress (warm water) will arguably be the greatest driver of coral reef loss in the coming decades. Understanding how corals have adapted to distinct oceanographic regimes on multiple scales can provide insight into future tolerance and persistence, information critical...
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:702256 2023-05-15T17:51:48+02:00 Porites coral response to an oceanographic and human impact gradient in the Line Islands Carilli, Jessica E. Hartmann, Aaron C. Heron, Scott F. Pandolfi, John M. Cobb, Kim Sayani, Hussein Dunbar, Robert Sandin, Stuart A. 2017-10-05 https://espace.library.uq.edu.au/view/UQ:702256/UQ702256_OA.pdf https://espace.library.uq.edu.au/view/UQ:702256 eng eng Wiley doi:10.1002/lno.10670 issn:0024-3590 issn:1939-5590 issn:1939-5604 orcid:0000-0003-3047-6694 Not set Great-Barrier-Reef Marine Protected Areas Ocean Acidification Energy Allocation Bleached Corals Pocillopora-Damicornis Environmental-Stress Particulate Matter Thermal History Growth-Rates 1104 Aquatic Science 1910 Oceanography Journal Article 2017 ftunivqespace https://doi.org/10.1002/lno.10670 2020-12-08T02:39:54Z Coral bleaching caused by heat stress (warm water) will arguably be the greatest driver of coral reef loss in the coming decades. Understanding how corals have adapted to distinct oceanographic regimes on multiple scales can provide insight into future tolerance and persistence, information critical to directed intervention or targeted protections. The northern Line Islands span a gradient in oceanographic regimes across latitudes, with seawater becoming warmer, fresher, more oligotrophic, and more saturated with aragonite away from the equator. The combination of this regional gradient and island-scale (local) conditions was used as a natural experiment against which to test how massive Porites corals respond to these background conditions and episodic heat stress. We found that coral condition, represented by a metric combining tissue thickness, lipids, and calcification, was similar at almost all islands, though there were differences in how corals allocate resources among these biological parameters. Corals at Teraina, the most densely inhabited island, showed evidence for reduced calcification, potentially associated with human impacts and/or outflow of freshwater from the island. In contrast, Porites corals at Palmyra, a wildlife reserve, exhibited unexpectedly high tissue-condition metrics for its latitude, suggesting an additional food source, possibly plankton-rich lagoonal outflow. We did not find a strong relationship between human habitation and the response of Porites corals to recent heat stress. However, differences in coral calcification rates and energy stores between observed values and those expected based solely on the regional oceanographic gradient, suggests local effects have indirect impacts on these corals. Article in Journal/Newspaper Ocean acidification The University of Queensland: UQ eSpace Line Islands ENVELOPE(-67.233,-67.233,-67.933,-67.933) Limnology and Oceanography 62 6 2850 2863 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Great-Barrier-Reef Marine Protected Areas Ocean Acidification Energy Allocation Bleached Corals Pocillopora-Damicornis Environmental-Stress Particulate Matter Thermal History Growth-Rates 1104 Aquatic Science 1910 Oceanography |
spellingShingle |
Great-Barrier-Reef Marine Protected Areas Ocean Acidification Energy Allocation Bleached Corals Pocillopora-Damicornis Environmental-Stress Particulate Matter Thermal History Growth-Rates 1104 Aquatic Science 1910 Oceanography Carilli, Jessica E. Hartmann, Aaron C. Heron, Scott F. Pandolfi, John M. Cobb, Kim Sayani, Hussein Dunbar, Robert Sandin, Stuart A. Porites coral response to an oceanographic and human impact gradient in the Line Islands |
topic_facet |
Great-Barrier-Reef Marine Protected Areas Ocean Acidification Energy Allocation Bleached Corals Pocillopora-Damicornis Environmental-Stress Particulate Matter Thermal History Growth-Rates 1104 Aquatic Science 1910 Oceanography |
description |
Coral bleaching caused by heat stress (warm water) will arguably be the greatest driver of coral reef loss in the coming decades. Understanding how corals have adapted to distinct oceanographic regimes on multiple scales can provide insight into future tolerance and persistence, information critical to directed intervention or targeted protections. The northern Line Islands span a gradient in oceanographic regimes across latitudes, with seawater becoming warmer, fresher, more oligotrophic, and more saturated with aragonite away from the equator. The combination of this regional gradient and island-scale (local) conditions was used as a natural experiment against which to test how massive Porites corals respond to these background conditions and episodic heat stress. We found that coral condition, represented by a metric combining tissue thickness, lipids, and calcification, was similar at almost all islands, though there were differences in how corals allocate resources among these biological parameters. Corals at Teraina, the most densely inhabited island, showed evidence for reduced calcification, potentially associated with human impacts and/or outflow of freshwater from the island. In contrast, Porites corals at Palmyra, a wildlife reserve, exhibited unexpectedly high tissue-condition metrics for its latitude, suggesting an additional food source, possibly plankton-rich lagoonal outflow. We did not find a strong relationship between human habitation and the response of Porites corals to recent heat stress. However, differences in coral calcification rates and energy stores between observed values and those expected based solely on the regional oceanographic gradient, suggests local effects have indirect impacts on these corals. |
format |
Article in Journal/Newspaper |
author |
Carilli, Jessica E. Hartmann, Aaron C. Heron, Scott F. Pandolfi, John M. Cobb, Kim Sayani, Hussein Dunbar, Robert Sandin, Stuart A. |
author_facet |
Carilli, Jessica E. Hartmann, Aaron C. Heron, Scott F. Pandolfi, John M. Cobb, Kim Sayani, Hussein Dunbar, Robert Sandin, Stuart A. |
author_sort |
Carilli, Jessica E. |
title |
Porites coral response to an oceanographic and human impact gradient in the Line Islands |
title_short |
Porites coral response to an oceanographic and human impact gradient in the Line Islands |
title_full |
Porites coral response to an oceanographic and human impact gradient in the Line Islands |
title_fullStr |
Porites coral response to an oceanographic and human impact gradient in the Line Islands |
title_full_unstemmed |
Porites coral response to an oceanographic and human impact gradient in the Line Islands |
title_sort |
porites coral response to an oceanographic and human impact gradient in the line islands |
publisher |
Wiley |
publishDate |
2017 |
url |
https://espace.library.uq.edu.au/view/UQ:702256/UQ702256_OA.pdf https://espace.library.uq.edu.au/view/UQ:702256 |
long_lat |
ENVELOPE(-67.233,-67.233,-67.933,-67.933) |
geographic |
Line Islands |
geographic_facet |
Line Islands |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
doi:10.1002/lno.10670 issn:0024-3590 issn:1939-5590 issn:1939-5604 orcid:0000-0003-3047-6694 Not set |
op_doi |
https://doi.org/10.1002/lno.10670 |
container_title |
Limnology and Oceanography |
container_volume |
62 |
container_issue |
6 |
container_start_page |
2850 |
op_container_end_page |
2863 |
_version_ |
1766159069639344128 |