气候变化领域集成服务门户(CCPortal): Seawater carbonate chemistry and pH at the site of calcification within the calcifying fluid/medium of coralline algae in laboratory experiment

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.875262
	Seawater carbonate chemistry and pH at the site of calcification within the calcifying fluid/medium of coralline algae in laboratory experiment
	Cornwall; Christopher Edward; Comeau; Steeve; McCulloch; Malcolm T
发布日期	2017-05-17
数据集类型	dataset
英文关键词	Acid-base regulation ; Amphiroa anceps ; Benthos ; Calcification/Dissolution ; Coast and continental shelf ; Containers and aquaria (20- 1000 L or &lt ; 1 m**2) ; Indian Ocean ; Laboratory experiment ; Macroalgae ; Neogoniolithon sp. ; Plantae ; Rhodophyta ; Single species ; Sporolithon durum ; Temperate
英文简介	Coralline algae provide important ecosystem services but are susceptible to the impacts of ocean acidification. However, the mechanisms are uncertain, and the magnitude is species specific. Here, we assess whether species-specific responses to ocean acidification of coralline algae are related to differences in pH at the site of calcification within the calcifying fluid/medium (pHcf) using delta 11B as a proxy. Declines in delta 11B for all three species are consistent with shifts in delta 11B expected if B(OH)4- was incorporated during precipitation. In particular, the delta11B ratio in Amphiroa anceps was too low to allow for reasonable pHcf values if B(OH)3 rather than B(OH)4- was directly incorporated from the calcifying fluid. This points towards delta 11B being a reliable proxy for pHcf for coralline algal calcite and that if B(OH)3 is present in detectable proportions, it can be attributed to secondary postincorporation transformation of B(OH)4-. We thus show that pHcf is elevated during calcification and that the extent is species specific. The net calcification of two species of coralline algae (Sporolithon durum, and Amphiroa anceps) declined under elevated CO2, as did their pHcf. Neogoniolithon sp. had the highest pHcf, and most constant calcification rates, with the decrease in pHcf being 1/4 that of seawater pH in the treatments, demonstrating a control of coralline algae on carbonate chemistry at their site of calcification. The discovery that coralline algae upregulate pHcf under ocean acidification is physiologically important and should be included in future models involving calcification.
空间范围	Latitude: -32.000000 * Longitude: 115.000000
时间范围	2015-08-31T00:00:00 - 2015-08-31T00:00:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/216492
推荐引用方式 GB/T 7714	Cornwall,Christopher Edward,Comeau,et al. Seawater carbonate chemistry and pH at the site of calcification within the calcifying fluid/medium of coralline algae in laboratory experiment.2017-05-17.https://doi.org/10.1594/PANGAEA.875262.