气候变化领域集成服务门户(CCPortal): Data of photosynthesis and mineralogy of Jania rubens at low pH/high pCO2

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.900624
	Data of photosynthesis and mineralogy of Jania rubens at low pH/high pCO2
	Porzio; Lucia; Buia; Maria-Cristina; Ferretti; Viviana; Lorenti; Maurizio; Rossi; Manuela; Trifuoggi; Marco; Vergara; Alessandro; Arena; Carmen
发布日期	2019-04-24
数据集类型	dataset
英文简介	Corallinales (Rhodophyta) are high Mg-calcite macroalgae and are considered among the most vulnerable organisms to ocean acidification (OA). These sensitive species play fundamental roles in coastal systems as food source and settlement promoters as well as being involved in reef stabilization, and water carbonate balance. At present only a few studies are focused on erect calcifying macroalgae under low pH/high pCO2 and the contrasting results make difficult to predict the ecological consequences of the OA on the coralline algae. In this paper the physiological reasons behind the resistance of Jania rubens, one of the most common calcareous species, to changing ocean pH are analysed. In particular, we studied the photosynthetic and mineralogical response of J. rubens after a three-week transplant in a natural CO2 vent system. The overall results showed that J. rubens could be able to survive under predicted pH conditions even though with a reduced fitness; nevertheless physiological limits prevent the growth and survival of the species at pH 6.7. At low pH (i.e. pH 7.5), the maximum and effective PSII efficiency decreased even if the increase of Rubisco expression suggests a compensation effort of the species to cope with the decreased light-driven products. In these circumstances, a pH-driven bleaching phenomenon was also observed. Even though the photosynthesis decreased at low pH, J. rubens maintained unchanged the mineralogical composition and the carbonate content in the cell wall, suggesting that the calcification process may also have a physiological relevance in addition to a structural and/or a protective role. Further studies will confirm the hypotheses on the functional and evolutionary role of the calcification process in coralline algae and on the ecological consequences of the community composition changes under high pCO2 oceans.
空间范围	Latitude: 40.730820 * Longitude: 13.951480
时间范围	2008-05-01T00:00:00 - 2008-05-31T00:00:00
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/215874
推荐引用方式 GB/T 7714	Porzio,Lucia,Buia,et al. Data of photosynthesis and mineralogy of Jania rubens at low pH/high pCO2.2019-04-24.https://doi.org/10.1594/PANGAEA.900624.