Spatial and seasonal reef calcification in corals and calcareous crusts in the central Red Sea.

Journal article


Roik, Anna, Roder, Cornelia, Röthig, Till and Voolstra, Christian R. 2015. Spatial and seasonal reef calcification in corals and calcareous crusts in the central Red Sea. Coral Reefs. https://doi.org/10.1007/s00338-015-1383-y
AuthorsRoik, Anna, Roder, Cornelia, Röthig, Till and Voolstra, Christian R.
Abstract

The existence of coral reef ecosystems critically relies on the reef carbonate framework produced by scleractinian corals and calcareous crusts (i.e., crustose coralline algae). While the Red Sea harbors one of the longest connected reef systems in the world, detailed calcification data are only available from the northernmost part. To fill this knowledge gap, we measured in situ calcification rates of primary and secondary reef builders in the central Red Sea. We collected data on the major habitat-forming coral genera Porites, Acropora, and Pocillopora and also on calcareous crusts (CC) in a spatioseasonal framework. The scope of the study comprised sheltered and exposed sites of three reefs along a crossshelf gradient and over four seasons of the year. Calcification of all coral genera was consistent across the shelf and highest in spring. In addition, Pocillopora showed increased calcification at exposed reef sites. In contrast, CC calcification increased from nearshore, sheltered to offshore, exposed reef sites, but also varied over seasons. Comparing our data to other reef locations, calcification in the Red Sea was in the range of data collected from reefs in the Caribbean and Indo-Pacific; however, Acropora calcification estimates were at the lower end of worldwide rates. Our study shows that the increasing coral cover from nearshore to offshore environments aligned with CC calcification but not coral calcification, highlighting the potentially important role of CC in structuring reef cover and habitats. While coral calcification maxima have been typically observed during summer in many reef locations worldwide, calcification maxima during spring in the central Red Sea indicate that summer temperatures exceed the optima of reef calcifiers in this region. This study provides a foundation for comparative efforts and sets a baseline to quantify impact of future environmental change in the central Red Sea.

KeywordsCalcification; Red Sea
Year2015
JournalCoral Reefs
PublisherSpringer
ISSN0722-4028
1432-0975
Digital Object Identifier (DOI)https://doi.org/10.1007/s00338-015-1383-y
Web address (URL)http://hdl.handle.net/10545/623374
hdl:10545/623374
Publication dates14 Dec 2015
Publication process dates
Deposited24 Jan 2019, 17:56
Accepted27 Nov 2015
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Archived with thanks to Coral Reefs

ContributorsKing Abdullah University of Science and Technology (KAUST)
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https://repository.derby.ac.uk/item/9430w/spatial-and-seasonal-reef-calcification-in-corals-and-calcareous-crusts-in-the-central-red-sea

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