气候变化领域集成服务门户(CCPortal): Long-term acclimation to elevated pCO2 alters carbon metabolism and reduces growth in the Antarctic diatom Nitzschia lecointei

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.869122
	Long-term acclimation to elevated pCO2 alters carbon metabolism and reduces growth in the Antarctic diatom Nitzschia lecointei
	Torstensson; Anders; Hedblom; Mikael; Mattsdotter Björk; M y; Chierici; Melissa; Wulff; Angela
发布日期	2016-12-06
数据集类型	dataset
英文关键词	Antarctic ; Bottles or small containers/Aquaria ( 20 L) ; Chromista ; Growth/Morphology ; Laboratory experiment ; Laboratory strains ; Nitzschia lecointei ; Ochrophyta ; Other metabolic rates ; Pelagos ; Phytoplankton ; Primary production/Photosynthesis ; Single species
英文简介	Increasing atmospheric CO2 levels are driving changes in the seawater carbonate system, resulting in higher pCO2 and reduced pH (ocean acidification). Many studies on marine organisms have focused on short-term physiological responses to increased pCO2, and few on slow-growing polar organisms with a relative low adaptation potential. In order to recognize the consequences of climate change in biological systems, acclimation and adaptation to new environments are crucial to address. In this study, physiological responses to long-term acclimation (194 days, approx. 60 asexual generations) of three pCO2 levels (280, 390 and 960 µatm) were investigated in the psychrophilic sea ice diatom Nitzschia lecointei. After 147 days, a small reduction in growth was detected at 960 µatm pCO2. Previous short-term experiments have failed to detect altered growth in N. lecointei at high pCO2, which illustrates the importance of experimental duration in studies of climate change. In addition, carbon metabolism was significantly affected by the long-term treatments, resulting in higher cellular release of dissolved organic carbon (DOC). In turn, the release of labile organic carbon stimulated bacterial productivity in this system. We conclude that long-term acclimation to ocean acidification is important for N. lecointei and that carbon overconsumption and DOC exudation may increase in a high-CO2 world.
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/216696
推荐引用方式 GB/T 7714	Torstensson,Anders,Hedblom,et al. Long-term acclimation to elevated pCO2 alters carbon metabolism and reduces growth in the Antarctic diatom Nitzschia lecointei.2016-12-06.https://doi.org/10.1594/PANGAEA.869122.