气候变化领域集成服务门户(CCPortal): The effect of phosphorus limitation and heat stress on calcification in Emiliania huxleyi

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.885925
	The effect of phosphorus limitation and heat stress on calcification in Emiliania huxleyi
	Gerecht; Andrea; Šupraha; Luka; Henderiks; Jorijntje
发布日期	2018-02-05
数据集类型	dataset
英文简介	Calcifying haptophytes (coccolithophores) sequester carbon in the form of organic and inorganic cellular components (coccoliths). We examined the effect of phosphorus (P) limitation and heat stress on particulate organic and inorganic carbon (calcite) production in the coccolithophore Emiliania huxleyi. Both environmental stressors are related to rising CO2 levels and affect carbon production in marine microalgae, which in turn impacts biogeochemical cycling. Using semi-continuous cultures, we show that P limitation and heat stress decrease the calcification rate in E. huxleyi. However, using batch cultures, we show that different culturing approaches (batch versus semi-continuous) induce different physiologies. This affects the ratio of particulate inorganic (PIC) to organic carbon (POC) and complicates general predictions on the effect of P limitation on the PIC/POC ratio. We found heat stress to increase P requirements in E. huxleyi, possibly leading to lower standing stocks in a warmer ocean, especially if this is linked to lower nutrient input. In summary, the predicted rise in global temperature and resulting decrease in nutrient availability may decrease CO2 sequestration by E. huxleyi through lower overall carbon production. Additionally, the export of carbon may be diminished by a decrease in calcification and a weaker coccolith ballasting effect.
空间范围	Latitude: 59.316670 * Longitude: 10.583330
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/216301
推荐引用方式 GB/T 7714	Gerecht,Andrea,Šupraha,et al. The effect of phosphorus limitation and heat stress on calcification in Emiliania huxleyi.2018-02-05.https://doi.org/10.1594/PANGAEA.885925.