Operation of an enclosed aquatic ecosystem in the Shenzhou-8 mission

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	Operation of an enclosed aquatic ecosystem in the Shenzhou-8 mission
	Li, Xiaoyan 1; Richter, Peter R.2; Hao, Zongjie 1; An, Yanjun 1; Wang, Gaohong 1; Li, Dunhai 1; Liu, Yongding 1; Strauch, Sebastian M.2; Schuster, Martin 2; Haag, Ferdinand W.2
刊名	ACTA ASTRONAUTICA
	2017-05-01
卷号	134 页码:17-22
关键词	Euglena gracilis Chlorella pyrenoidosa enclosed aquatic ecosystem Shenzhou-8 microgravity life support system
ISSN号	0094-5765
英文摘要	Long-term spaceflight needs reliable Biological life support systems (BLSS) to supply astronauts with enough food, fresh air and recycle wasters, but the knowledge about the operation pattern and controlling strategy is rear. For this purpose, a miniaturized enclosed aquatic ecosystem was developed and flown on the Chinese spaceship Shenzhou-8. The system with a total volume of about 60 mL was separated into two chambers by means of a gas transparent membrane. The lower chamber was inoculated with Euglena gracilis cells, and the upper chamber was cultured with Chlorella cells and three snails. After 17.5 days flight, the samples were analyzed. It was found that all snails in the ground module (GM) were alive, while in the flight module (FM) only one snail survived. The total cell numbers, assimilation of nutrients like nitrogen and phosphorus, soluble proteins and carbohydrate contents showed a decrease in FM than in GM. The correlation analysis showed upper chambers of both FM and GM had the same positive and negative correlation factors, while differential correlation was found in lower chambers. These results suggested primary productivity in the enclosed system decreased in microgravity, accompanied with nutrients assimilation. The FM chamber endured lacking of domination species to sustain the system development and GM chamber endured richness in population abundance. These results implied photosynthesis intensity should be reduced to keep the system healthy. More Chlorella but less Euglena might be a useful strategy to sustain system stability. It is the first systematic analysis of enclosed systems in microgravity.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Aerospace
研究领域[WOS]	Engineering
关键词[WOS]	NITRITE ; NITRATE
收录类别	SCI
语种	英语
WOS记录号	WOS:000397698900003
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/29065]
专题	水生生物研究所_其他_期刊论文
作者单位	1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China 2.Univ Erlangen Nurnberg, Dept Cell Biol, Dept Biol, Erlangen, Germany
推荐引用方式 GB/T 7714	Li, Xiaoyan,Richter, Peter R.,Hao, Zongjie,et al. Operation of an enclosed aquatic ecosystem in the Shenzhou-8 mission[J]. ACTA ASTRONAUTICA,2017,134:17-22.
APA	Li, Xiaoyan.,Richter, Peter R..,Hao, Zongjie.,An, Yanjun.,Wang, Gaohong.,...&Lebert, Michael.(2017).Operation of an enclosed aquatic ecosystem in the Shenzhou-8 mission.ACTA ASTRONAUTICA,134,17-22.
MLA	Li, Xiaoyan,et al."Operation of an enclosed aquatic ecosystem in the Shenzhou-8 mission".ACTA ASTRONAUTICA 134(2017):17-22.