DOI: 10.1002/grl.50948
论文题名: Permeable coral reef sediment dissolution driven by elevated pCO 2 and pore water advection
作者: Cyronak T. ; Santos I.R. ; Eyre B.D.
刊名: Geophysical Research Letters
ISSN: 0094-8535
EISSN: 1944-8266
出版年: 2013
卷: 40, 期: 18 起始页码: 4876
结束页码: 4881
语种: 英语
英文关键词: advection
; CaCO 3 sediment
; calcium carbonate
; coral reef
; dissolution
; ocean acidification
Scopus关键词: Coral reef
; Coral reef ecosystems
; Coral reef sediments
; Dissolution rates
; Natural conditions
; Ocean acidifications
; Pore waters
; Acidification
; Advection
; Biomineralization
; Bone
; Calcium carbonate
; Carbon dioxide
; Ecosystems
; Lakes
; Reefs
; Sediments
; Water
; Dissolution
; acidification
; advection
; calcification
; calcium carbonate
; carbon dioxide
; coral reef
; dissolution
; permeability
; porewater
; precipitation (chemistry)
; sediment analysis
; Australia
; Heron Island
; Queensland
; Anthozoa
英文摘要: Ocean acidification (OA) is expected to drive the transition of coral reef ecosystems from net calcium carbonate (CaCO3) precipitating to net dissolving within the next century. Although permeable sediments represent the largest reservoir of CaCO3 in coral reefs, the dissolution of shallow CaCO3 sands under future pCO2 levels has not been measured under natural conditions. In situ, advective chamber incubations under elevated pCO2 (~800 μatm) shifted the sediments from net precipitating to net dissolving. Pore water advection more than doubled dissolution rates (1.10 g CaCO3 m-2 d-1) when compared to diffusive conditions (0.42 g CaCO3 m-2 d -1). Sediment dissolution could reduce net ecosystem calcification rates of the Heron Island lagoon by 8% within the next century, which is equivalent to a 25% reduction in the global average calcification rate of coral lagoons. The dissolution of CaCO3 sediments needs to be taken into account in order to address how OA will impact the net accretion of coral reefs under future predicted increases in CO2. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84884328242&doi=10.1002%2fgrl.50948&partnerID=40&md5=467673b89cc3125eeb53fb68f323c464
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5799
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
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:
Cyronak T.,Santos I.R.,Eyre B.D.. Permeable coral reef sediment dissolution driven by elevated pCO 2 and pore water advection[J]. Geophysical Research Letters,2013-01-01,40(18).