气候变化领域集成服务门户(CCPortal): Porites Calcifying Fluid pH on Seasonal to Diurnal Scales

CCPortal

DOI	10.1029/2020JC016889
	Porites Calcifying Fluid pH on Seasonal to Diurnal Scales
	Knebel O.; Carvajal C.; Standish C.D.; Vega E.D.L.; Chalk T.B.; Ryan E.J.; Guo W.; Ford M.; Foster G.L.; Kench P.
发表日期	2021
ISSN	21699275
卷号	126 期号:3
英文摘要	Coral resilience to ocean acidification is largely determined by the degree of physiological control corals can exert on their calcifying fluid carbonate chemistry. In this study, the boron isotopic composition (δ11B) of a Porites colony growing on a reef flat on Kiritimati Island in the equatorial central Pacific is examined to quantify the sensitivity of calcifying fluid pH (pHcf) to ambient environmental conditions. Skeletal δ11B along the growth axis of one annual growth band was determined with bulk analysis and by laser ablation (LA) MC-ICP-MS. Furthermore, the oxygen and carbon isotopic composition, trace element ratios, and skeletal density were quantified. Sclerochronological data were interpreted in the context of simultaneous recordings of reef flat seawater pH (pHsw), temperature, salinity, and water depth, and by measurements of these parameters on the fore-reef. A recent model of pHcf upregulation, after optimization with seasonally resolved data, was used to simulate pHcf variability on a diurnal scale. Results showed that on a seasonal scale, Porites pHcf is upregulated compared to ambient seawater: both bulk and LA-MC-ICP-MS derived δ11B resulted in a mean pHcf of 8.35 pH units. Calcifying fluid pH upregulation primarily followed variations in seawater temperatures, that is likely related to the control of temperature on calcification rate. On the reef flat, the diurnal range in pHsw was substantially higher (0.29 pH units) than on the fore-reef (0.07 pH units). However, model results suggest that the high diurnal variability in reef flat pHsw resulted only in a limited variability in Porites pHcf. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	boron isotopes; calcification; corals; ocean acidification
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186441
作者单位	School of Environment, University of Auckland, Auckland, New Zealand; School of Ocean and Earth Science, University of Southampton, Southampton, United Kingdom; Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Department of Earth Sciences, Simon Fraser University, Burnaby, BC, Canada
推荐引用方式 GB/T 7714	Knebel O.,Carvajal C.,Standish C.D.,et al. Porites Calcifying Fluid pH on Seasonal to Diurnal Scales[J],2021,126(3).
APA	Knebel O..,Carvajal C..,Standish C.D..,Vega E.D.L..,Chalk T.B..,...&Kench P..(2021).Porites Calcifying Fluid pH on Seasonal to Diurnal Scales.Journal of Geophysical Research: Oceans,126(3).
MLA	Knebel O.,et al."Porites Calcifying Fluid pH on Seasonal to Diurnal Scales".Journal of Geophysical Research: Oceans 126.3(2021).