Shifting nutrient-mediated interactions between algae and bacteria in a microcosm: Evidence from alkaline phosphatase assay

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	Shifting nutrient-mediated interactions between algae and bacteria in a microcosm: Evidence from alkaline phosphatase assay
	Liu, Huali 2; Zhou, Yiyong 1; Xiao, Wenjuan 1,3; Ji, Lei 1,3; Cao, Xiuyun 1; Song, Chunlei 1
刊名	MICROBIOLOGICAL RESEARCH
	2012
卷号	167 期号:5 页码:292-298
关键词	Algae Bacteria Nutrient Alkaline phosphatase activity Microcosm
ISSN号	0944-5013
通讯作者	Song, CL (reprint author), Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, 7 Donghu S Rd, Wuhan 430072, Peoples R China.
中文摘要	The impacts of different nutrient additions (N + P, N + P + C, 4N + P, 4N + P + C, N + 2P) on the growth of algae and bacteria were studied in a microcosm experiment. Since alkaline phosphatase activity (APA) provides an indication of phosphorus deficiency, the higher value for algal APA in the treatments with excess nitrogen and for bacterial APA in the treatments with excess carbon suggested that, algal and bacterial phosphorus-limited status were induced by abundant nitrogen and carbon input, respectively. Bacterial phosphorus-limited status was weakened due to higher bacterial competition for phosphorus. compared to algae. In comparison with the bacterial and specific bacterial APA, higher values of algal and specific algal APA were found, which showed a gradual increase that coincided with the increase of chlorophyll a concentration. This fact indicated not only a stronger phosphorus demand by algae than by bacteria, but also a complementary relationship for phosphorus demand between algae and bacteria. However, this commensalism could be interfered by glucose input resulting in the decline of chlorophyll a concentration. Furthermore, the correlation between bacterial numbers and chlorophyll a concentration was positive in treatments without carbon and blurry in treatments with carbon. These observations validate a hypothesis that carbon addition can stimulate bacterial growth justifying bacterial nutrient demand, which decreases the availability of nutrients to algae and affects nutrient relationship between algae and bacteria. However, this interference would terminate after algal and bacterial adaption to carbon input. (C) 2011 Elsevier GmbH. All rights reserved.
英文摘要	The impacts of different nutrient additions (N + P, N + P + C, 4N + P, 4N + P + C, N + 2P) on the growth of algae and bacteria were studied in a microcosm experiment. Since alkaline phosphatase activity (APA) provides an indication of phosphorus deficiency, the higher value for algal APA in the treatments with excess nitrogen and for bacterial APA in the treatments with excess carbon suggested that, algal and bacterial phosphorus-limited status were induced by abundant nitrogen and carbon input, respectively. Bacterial phosphorus-limited status was weakened due to higher bacterial competition for phosphorus. compared to algae. In comparison with the bacterial and specific bacterial APA, higher values of algal and specific algal APA were found, which showed a gradual increase that coincided with the increase of chlorophyll a concentration. This fact indicated not only a stronger phosphorus demand by algae than by bacteria, but also a complementary relationship for phosphorus demand between algae and bacteria. However, this commensalism could be interfered by glucose input resulting in the decline of chlorophyll a concentration. Furthermore, the correlation between bacterial numbers and chlorophyll a concentration was positive in treatments without carbon and blurry in treatments with carbon. These observations validate a hypothesis that carbon addition can stimulate bacterial growth justifying bacterial nutrient demand, which decreases the availability of nutrients to algae and affects nutrient relationship between algae and bacteria. However, this interference would terminate after algal and bacterial adaption to carbon input. (C) 2011 Elsevier GmbH. All rights reserved.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Microbiology
研究领域[WOS]	Microbiology
关键词[WOS]	INORGANIC NUTRIENTS ; MICROBIAL LOOP ; PHYTOPLANKTON ; PHOSPHORUS ; BACTERIOPLANKTON ; STOICHIOMETRY ; COMPETITION ; ECOSYSTEM
收录类别	SCI
资助信息	National Key Basic Research and Development Program of China[2008CB418006]; National Science Foundation of China[40903030]; International Foundation for Science (IFS)[A/4529-1]; Chinese Academy of Sciences; [2012ZX07103-004]
语种	英语
WOS记录号	WOS:000304430100005
公开日期	2012-09-25
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/16981]
专题	水生生物研究所_水环境工程研究中心_期刊论文
作者单位	1.Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China 2.Wuhan Univ Sci & Engn, Wuhan 430073, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Liu, Huali,Zhou, Yiyong,Xiao, Wenjuan,et al. Shifting nutrient-mediated interactions between algae and bacteria in a microcosm: Evidence from alkaline phosphatase assay[J]. MICROBIOLOGICAL RESEARCH,2012,167(5):292-298.
APA	Liu, Huali,Zhou, Yiyong,Xiao, Wenjuan,Ji, Lei,Cao, Xiuyun,&Song, Chunlei.(2012).Shifting nutrient-mediated interactions between algae and bacteria in a microcosm: Evidence from alkaline phosphatase assay.MICROBIOLOGICAL RESEARCH,167(5),292-298.
MLA	Liu, Huali,et al."Shifting nutrient-mediated interactions between algae and bacteria in a microcosm: Evidence from alkaline phosphatase assay".MICROBIOLOGICAL RESEARCH 167.5(2012):292-298.