气候变化领域集成服务门户(CCPortal): Phytoplankton, Microzooplankton and Fatty Acid Composition in the KOSMOS Experiment Bergen 2015

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.896337
	Phytoplankton, Microzooplankton and Fatty Acid Composition in the KOSMOS Experiment Bergen 2015
	Hauss; Helena; Ismar; Stefanie M; Dörner; Isabel; Abele; Doris; Lohbeck; Kai T; Riebesell; Ulf
发布日期	2018-11-29
数据集类型	dataset
英文简介	Quantifying effects of Ocean Acidification (OA) on marine primary and secondary producers is of acute interest, as they could translate up to higher trophic levels and ultimately may alter ecosystem services including fishery yields. A mesocosm approach was used to investigate the effects of OA on a natural plankton community in coastal waters off Norway by manipulating CO2 partial pressure (pCO2). Eight enclosures were deployed in the Raunefjord near Bergen. Treatment levels were ambient and elevated pCO2 of ~ 2000 µatm each in four replicate enclosures. The experiment lasted for 53 days in early summer of 2015. To assess impacts of OA on the plankton community, we measured phytoplankton and protozooplankton biomass and total seston fatty acid (FA) content. In both the control and the elevated pCO2 treatment, the plankton community was dominated by the dinoflagellate Ceratium longipes. In the elevated pCO2 treatment, however, this species as well as other dinoflagellates were strongly negatively impacted: At the end of the experiment, total dinoflagellate biomass was fourfold higher in the control group than under elevated pCO2 treatment. In a size comparison of C. longipes, individuals in the high pCO2 treatment were significantly larger. Fatty acid analysis revealed a decreased ratio of polyunsaturated fatty acids (PUFA) to saturated fatty acids (SFA) at elevated pCO2. Further, docosahexaenoic acid (DHA, C 22:6n3c), essential for development and reproduction of copepods and higher trophic levels, was lower in the high pCO2 treatment. Both in quality and quantity of their food, higher trophic levels thus experienced worse conditions in a community exposed to elevated pCO2, with potentially severe consequences for higher trophic levels.
空间范围	Latitude: 60.265000 * Longitude: 5.205830
时间范围	2015-05-03T00:00:00 - 2015-06-30T00:00:00
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/215193
推荐引用方式 GB/T 7714	Hauss,Helena,Ismar,et al. Phytoplankton, Microzooplankton and Fatty Acid Composition in the KOSMOS Experiment Bergen 2015.2018-11-29.https://doi.org/10.1594/PANGAEA.896337.