DOI: 10.1002/grl.50802
论文题名: Hysteresis between coral reef calcification and the seawater aragonite saturation state
作者: McMahon A. ; Santos I.R. ; Cyronak T. ; Eyre B.D.
刊名: Geophysical Research Letters
ISSN: 0094-8592
EISSN: 1944-8323
出版年: 2013
卷: 40, 期: 17 起始页码: 4675
结束页码: 4679
语种: 英语
英文关键词: aragonite
; calcite
; carbon dioxide
; coastal waters
; ocean acidification
; permeable sediments
Scopus关键词: aragonite
; Coastal waters
; Coral reef calcification
; Coral reef lagoons
; Linear extrapolation
; Net ecosystem production
; Non-linear relationships
; Ocean acidifications
; Acidification
; Biomineralization
; Bone
; Calcite
; Carbon dioxide
; Carbonate minerals
; Hysteresis
; Seawater
; Reefs
; acidification
; aragonite
; calcification
; carbon dioxide
; coastal water
; coral reef
; hysteresis
; lagoon
; net ecosystem production
; saturation
; seawater
; Australia
; Coral Sea
; Great Barrier Reef
; Pacific Ocean
; Queensland
; Anthozoa
英文摘要: Some predictions of how ocean acidification (OA) will affect coral reefs assume a linear functional relationship between the ambient seawater aragonite saturation state (Ωa) and net ecosystem calcification (NEC). We quantified NEC in a healthy coral reef lagoon in the Great Barrier Reef during different times of the day. Our observations revealed a diel hysteresis pattern in the NEC versus Ωa relationship, with peak NEC rates occurring before the Ωa peak and relatively steady nighttime NEC in spite of variable Ωa. Net ecosystem production had stronger correlations with NEC than light, temperature, nutrients, pH, and Ωa. The observed hysteresis may represent an overlooked challenge for predicting the effects of OA on coral reefs. If widespread, the hysteresis could prevent the use of a linear extrapolation to determine critical Ωa threshold levels required to shift coral reefs from a net calcifying to a net dissolving state. Key Points Non-linear relationship between the aragonite saturation and calcification Production drives both calcification and the aragonite saturation state Predicting the effects of ocean acidification may be more complex than thought ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84883611900&doi=10.1002%2fgrl.50802&partnerID=40&md5=dfb2d2fe92b455c6f082c77705b8250d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5856
Appears in Collections: 气候减缓与适应
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作者单位: Centre for Coastal Biogeochemistry, School of Environment, Science and Engineering, Southern Cross University, PO Box 157, Lismore, NSW 2480, Australia
Recommended Citation:
McMahon A.,Santos I.R.,Cyronak T.,et al. Hysteresis between coral reef calcification and the seawater aragonite saturation state[J]. Geophysical Research Letters,2013-01-01,40(17).