气候变化领域集成服务门户(CCPortal): Calcification of the Arctic coralline red algae Lithothamnion glaciale in response to elevated CO2

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.834495
	Calcification of the Arctic coralline red algae Lithothamnion glaciale in response to elevated CO2
	Büdenbender; Jan; Riebesell; Ulf; Form; Armin
发布日期	2014-07-30
数据集类型	dataset
英文关键词	Arctic ; Benthos ; Bottles or small containers/Aquaria ( 20 L) ; Calcification/Dissolution ; Coast and continental shelf ; Laboratory experiment ; Lithothamnion glaciale ; Macroalgae ; Plantae ; Polar ; Rhodophyta ; Single species
英文简介	Rising atmospheric CO2 concentrations could cause a calcium carbonate subsaturation of Arctic surface waters in the next 20 yr, making these waters corrosive for calcareous organisms. It is presently unknown what effects this will have on Arctic calcifying organisms and the ecosystems of which they are integral components. So far, acidification effects on crustose coralline red algae (CCA) have only been studied in tropical and Mediterranean species. In this work, we investigated calcification rates of the CCA Lithothamnion glaciale collected in northwest Svalbard in laboratory experiments under future atmospheric CO2 concentrations. The algae were exposed to simulated Arctic summer and winter light conditions in 2 separate experiments at optimum growth temperatures. We found a significant negative effect of increased CO2 levels on the net calcification rates of L. glaciale in both experiments. Annual mean net dissolution of L. glaciale was estimated to start at an aragonite saturation state between 1.1 and 0.9 which is projected to occur in parts of the Arctic surface ocean between 2030 and 2050 if emissions follow 'business as usual' scenarios (SRES A2; IPCC 2007). The massive skeleton of CCA, which consist of more than 80% calcium carbonate, is considered crucial to withstanding natural stresses such as water movement, overgrowth or grazing. The observed strong negative response of this Arctic CCA to increased CO2 levels suggests severe threats of the projected ocean acidification for an important habitat provider in the Arctic coastal ocean.
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/217395
推荐引用方式 GB/T 7714	Büdenbender,Jan,Riebesell,et al. Calcification of the Arctic coralline red algae Lithothamnion glaciale in response to elevated CO2.2014-07-30.https://doi.org/10.1594/PANGAEA.834495.