气候变化领域集成服务门户(CCPortal): KOSMOS Finland 2012 mesocosm study: primary production and respiration

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.863933
	KOSMOS Finland 2012 mesocosm study: primary production and respiration
	Spilling; Kristian; Paul; Allanah; Virkkala; Niklas; Hastings; Tom; Lischka; Silke; Stuhr; Annegret; Bermúdez Monsalve; Rafael; Czerny; Jan; Boxhammer; Tim; Schulz; Kai Georg; Ludwig; Andrea; Riebesell; Ulf
发布日期	2016-08-18
数据集类型	dataset
英文简介	Anthropogenic carbon dioxide (CO2) emissions are reducing the pH in the world's oceans. The plankton community is a key component driving biogeochemical fluxes, and the effect of increased CO2 on plankton is critical for understanding the ramifications of ocean acidification on global carbon fluxes. We determined the plankton community composition and measured primary production, respiration rates and carbon export (defined here as carbon sinking out of a shallow, coastal area) during an ocean acidification experiment. Mesocosms (~ 55 m3) were set up in the Baltic Sea with a gradient of CO2 levels initially ranging from ambient (~ 240 µatm), used as control, to high CO2 (up to ~ 1330 µatm). The phytoplankton community was dominated by dinoflagellates, diatoms, cyanobacteria and chlorophytes, and the zooplankton community by protozoans, heterotrophic dinoflagellates and cladocerans. The plankton community composition was relatively homogenous between treatments. Community respiration rates were lower at high CO2 levels. The carbon-normalized respiration was approximately 40 % lower in the high CO2 environment compared with the controls during the latter phase of the experiment. We did not, however, detect any effect of increased CO2 on primary production. This could be due to measurement uncertainty, as the measured total particular carbon (TPC) and combined results presented in this special issue suggest that the reduced respiration rate translated into higher net carbon fixation. The percent carbon derived from microscopy counts (both phyto- and zooplankton), of the measured total particular carbon (TPC) decreased from ~ 26 % at t0 to ~ 8 % at t31, probably driven by a shift towards smaller plankton (< 4 µm) not enumerated by microscopy. Our results suggest that reduced respiration lead to increased net carbon fixation at high CO2. However, the increased primary production did not translate into increased carbon export, and did consequently not work as a negative feedback mechanism for increasing atmospheric CO2 concentration.
空间范围	Latitude: 59.858330 * Longitude: 23.258330
时间范围	2012-06-19T00:00:00 - 2012-08-04T00:00:00
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/216778
推荐引用方式 GB/T 7714	Spilling,Kristian,Paul,et al. KOSMOS Finland 2012 mesocosm study: primary production and respiration.2016-08-18.https://doi.org/10.1594/PANGAEA.863933.