Environmental controls on daytime net community calcification on a Red Sea reef flat

W. N. Bernstein, K. A. Hughen, Chris Langdon, D. C. McCorkle, S. J. Lentz

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Coral growth and carbonate accumulation form the foundation of the coral reef ecosystem. Changes in environmental conditions due to coastal development, climate change, and ocean acidification may pose a threat to net carbonate production in the near future. Controlled laboratory studies demonstrate that calcification by corals and coralline algae is sensitive to changes in aragonite saturation state (Ωa), as well as temperature, light, and nutrition. Studies also show that the dissolution rate of carbonate substrates is impacted by changes in carbonate chemistry. The sensitivity of coral reefs to these parameters must be confirmed and quantified in the natural environment in order to predict how coral reefs will respond to local and global changes, particularly ocean acidification. We estimated the daytime hourly net community metabolic rates, both net community calcification (NCC) and net community productivity (NCP), at Sheltered Reef, an offshore platform reef in the central Red Sea. Average NCC was 8 ± 3 mmol m−2 h−1 in December 2010 and 11 ± 1 mmol m−2 h−1 in May 2011, and NCP was 21 ± 7 mmol m−2 h−1 in December 2010 and 44 ± 4 mmol m−2 h−1 in May 2011. We also monitored a suite of physical and chemical properties to help relate the rates at Sheltered Reef to published rates from other sites. While previous research shows that short-term field studies investigating the NCC–Ωa relationship have differing results due to confounding factors, it is important to continue estimating NCC in different places, seasons, and years, in order to monitor changes in NCC versus Ω in space and time, and to ultimately resolve a broader understanding of this relationship.

Original languageEnglish (US)
Pages (from-to)1-15
Number of pages15
JournalCoral Reefs
DOIs
StateAccepted/In press - Jan 23 2016

Fingerprint

calcification
Red Sea
reefs
reef
carbonates
coral reefs
coral reef
carbonate
algae
corals
coral
coastal development
productivity
coralline alga
aragonite
global change
space and time
nutrition
chemical property
physical properties

Keywords

  • Acidification
  • Aragonite saturation
  • CaCO
  • Calcification
  • Coral

ASJC Scopus subject areas

  • Aquatic Science

Cite this

Environmental controls on daytime net community calcification on a Red Sea reef flat. / Bernstein, W. N.; Hughen, K. A.; Langdon, Chris; McCorkle, D. C.; Lentz, S. J.

In: Coral Reefs, 23.01.2016, p. 1-15.

Research output: Contribution to journalArticle

Bernstein, W. N. ; Hughen, K. A. ; Langdon, Chris ; McCorkle, D. C. ; Lentz, S. J. / Environmental controls on daytime net community calcification on a Red Sea reef flat. In: Coral Reefs. 2016 ; pp. 1-15.
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