Coral-Associated Bacterial Community Dynamics in Healthy, Bleached, and Disease States
Coral reefs are the proverbial rainforests of the ocean, but these spectacular structures are under threat from globally rising sea surface temperatures and ocean acidification. The Red Sea and the Persian/Arabian Gulf (PAG) display unusually high sea surface temperatures, and therefore, provide a m...
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ftkingabdullahun:oai:repository.kaust.edu.sa:10754/630144 2023-12-03T10:28:31+01:00 Coral-Associated Bacterial Community Dynamics in Healthy, Bleached, and Disease States Hadaidi, Ghaida A. Voolstra, Christian R. Daffonchio, Daniele Saikaly, Pascal Thurber, Rebecca Vega Biological and Environmental Science and Engineering (BESE) Division 2018-11 application/pdf application/vnd.ms-excel application/vnd.openxmlformats-officedocument.spreadsheetml.sheet http://hdl.handle.net/10754/630144 https://doi.org/10.25781/KAUST-0UN42 en eng Hadaidi, G. A. (2018). Coral-Associated Bacterial Community Dynamics in Healthy, Bleached, and Disease States. KAUST Research Repository. https://doi.org/10.25781/KAUST-0UN42 doi:10.25781/KAUST-0UN42 http://hdl.handle.net/10754/630144 At the time of archiving, the student author of this dissertation opted to temporarily restrict access to it. The full text of this dissertation became available to the public after the expiration of the embargo on 2019-12-04. 2019-12-04 Mucus-associated bacteria Carbohydrate composition Black Band Disease Coral bleaching Coral mucus Dissertation 2018 ftkingabdullahun https://doi.org/10.25781/KAUST-0UN42 2023-11-04T20:24:32Z Coral reefs are the proverbial rainforests of the ocean, but these spectacular structures are under threat from globally rising sea surface temperatures and ocean acidification. The Red Sea and the Persian/Arabian Gulf (PAG) display unusually high sea surface temperatures, and therefore, provide a model for studying environmental change. Corals are so-called holobionts consisting of the coral host, photosynthetic algae (Symbiodiniaceae), along with other microorganisms, such as bacteria, archaea, fungi, and viruses. While the importance of bacteria to coral holobiont functioning is acknowledged, little is known about changes in the microbial communities under natural environmental stressors in the Red Sea and the PAG. Accordingly, I investigated microbial community and mucus differences in bleached, healthy, and diseased corals. Analysis of the composition of mucus-associated microbial communities of bleached and healthy Porites lobata colonies from the Red Sea and the PAG were stable, although some regional differences were present. In a distinct study investigating coral disease, a broad range of corals in the Red Sea were shown to be infected with black band disease (BBD). Investigating the microbial community associated with BBD revealed the presence of the three main indicators for BBD (cyanobacteria, sulfate-reducing bacteria (SRB), and sulfide-oxidizing bacteria (SOB). Last, I investigated the chemical composition (carbohydrates) of the surface mucus layer of a range of Red Sea corals. Given that coral mucus represents a first line of defense, I was interested to examine whether mucus carbohydrate composition would point to a role of adaptation to the extreme environment of the Red Sea. This analysis showed that mucus consists of conserved sugars that are globally conserved. In summary, this thesis characterizes the microbial communities associated with a range of coral species in different health states (bleached, healthy, and diseased). The microbial community patterns I characterized support the notion ... Doctoral or Postdoctoral Thesis Ocean acidification King Abdullah University of Science and Technology: KAUST Repository Sob’ ENVELOPE(66.156,66.156,66.322,66.322) |
institution |
Open Polar |
collection |
King Abdullah University of Science and Technology: KAUST Repository |
op_collection_id |
ftkingabdullahun |
language |
English |
topic |
Mucus-associated bacteria Carbohydrate composition Black Band Disease Coral bleaching Coral mucus |
spellingShingle |
Mucus-associated bacteria Carbohydrate composition Black Band Disease Coral bleaching Coral mucus Hadaidi, Ghaida A. Coral-Associated Bacterial Community Dynamics in Healthy, Bleached, and Disease States |
topic_facet |
Mucus-associated bacteria Carbohydrate composition Black Band Disease Coral bleaching Coral mucus |
description |
Coral reefs are the proverbial rainforests of the ocean, but these spectacular structures are under threat from globally rising sea surface temperatures and ocean acidification. The Red Sea and the Persian/Arabian Gulf (PAG) display unusually high sea surface temperatures, and therefore, provide a model for studying environmental change. Corals are so-called holobionts consisting of the coral host, photosynthetic algae (Symbiodiniaceae), along with other microorganisms, such as bacteria, archaea, fungi, and viruses. While the importance of bacteria to coral holobiont functioning is acknowledged, little is known about changes in the microbial communities under natural environmental stressors in the Red Sea and the PAG. Accordingly, I investigated microbial community and mucus differences in bleached, healthy, and diseased corals. Analysis of the composition of mucus-associated microbial communities of bleached and healthy Porites lobata colonies from the Red Sea and the PAG were stable, although some regional differences were present. In a distinct study investigating coral disease, a broad range of corals in the Red Sea were shown to be infected with black band disease (BBD). Investigating the microbial community associated with BBD revealed the presence of the three main indicators for BBD (cyanobacteria, sulfate-reducing bacteria (SRB), and sulfide-oxidizing bacteria (SOB). Last, I investigated the chemical composition (carbohydrates) of the surface mucus layer of a range of Red Sea corals. Given that coral mucus represents a first line of defense, I was interested to examine whether mucus carbohydrate composition would point to a role of adaptation to the extreme environment of the Red Sea. This analysis showed that mucus consists of conserved sugars that are globally conserved. In summary, this thesis characterizes the microbial communities associated with a range of coral species in different health states (bleached, healthy, and diseased). The microbial community patterns I characterized support the notion ... |
author2 |
Voolstra, Christian R. Daffonchio, Daniele Saikaly, Pascal Thurber, Rebecca Vega Biological and Environmental Science and Engineering (BESE) Division |
format |
Doctoral or Postdoctoral Thesis |
author |
Hadaidi, Ghaida A. |
author_facet |
Hadaidi, Ghaida A. |
author_sort |
Hadaidi, Ghaida A. |
title |
Coral-Associated Bacterial Community Dynamics in Healthy, Bleached, and Disease States |
title_short |
Coral-Associated Bacterial Community Dynamics in Healthy, Bleached, and Disease States |
title_full |
Coral-Associated Bacterial Community Dynamics in Healthy, Bleached, and Disease States |
title_fullStr |
Coral-Associated Bacterial Community Dynamics in Healthy, Bleached, and Disease States |
title_full_unstemmed |
Coral-Associated Bacterial Community Dynamics in Healthy, Bleached, and Disease States |
title_sort |
coral-associated bacterial community dynamics in healthy, bleached, and disease states |
publishDate |
2018 |
url |
http://hdl.handle.net/10754/630144 https://doi.org/10.25781/KAUST-0UN42 |
long_lat |
ENVELOPE(66.156,66.156,66.322,66.322) |
geographic |
Sob’ |
geographic_facet |
Sob’ |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
Hadaidi, G. A. (2018). Coral-Associated Bacterial Community Dynamics in Healthy, Bleached, and Disease States. KAUST Research Repository. https://doi.org/10.25781/KAUST-0UN42 doi:10.25781/KAUST-0UN42 http://hdl.handle.net/10754/630144 |
op_rights |
At the time of archiving, the student author of this dissertation opted to temporarily restrict access to it. The full text of this dissertation became available to the public after the expiration of the embargo on 2019-12-04. 2019-12-04 |
op_doi |
https://doi.org/10.25781/KAUST-0UN42 |
_version_ |
1784253223860699136 |