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The relationship between light intensity and nutrient uptake kinetics in six freshwater diatoms
Shi, Pengling1,2; Shen, Hong2; Wang, Wenjing2; Chen, Wenjie1; Xie, Ping2
2015-08-01
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
ISSN1001-0742
Volume34Pages:28-36
AbstractIn order to find effective measures to control diatom blooms, a better understanding of the physiological characteristics of nutrient uptake in diatoms is needed. A study of P and Si-uptake kinetics for diatom species from two light regimes was conducted at low (LL), moderate (ML) and high light intensities (HL) (2, 25 and 80 mu mol photons/(m(2).sec)), respectively. The results showed that P uptake of diatoms was heavily influenced by historic light regimes. P affinity changed with growth and photosynthetic activity. The lowest half saturation constant for P uptake (K-m(P)) was under HL for high-light adapted diatoms while the lowest half-saturation constant for low-light adapted diatoms was observed under LL. The Si half-saturation constant (K-m(Si)) increased with increasing light intensities for pennate diatoms but decreased for centric diatoms. Diatom volumes were correlated with the maximum Si uptake rates (V-m(Si)) at HL and K-m(Si) at ML and HL for six diatom species. Our results imply that when we assess the development of diatom blooms we should consider light intensity and cell volume in addition to ambient Si or P concentration. The relationship between light intensity and P-uptake suggests that we can find suitable methods to control diatom blooms on the basis of reducing phytoplankton activity of P-uptake and photosynthesis simultaneously. (C) 2015 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
SubtypeArticle
KeywordDiatom Light Intensity Michaelis-menten Equation Phosphorus Silicon Uptake Kinetics
DOI10.1016/j.jes.2015.03.003
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS KeywordPHOSPHATE-UPTAKE KINETICS ; SILICIC-ACID UPTAKE ; SKELETONEMA-COSTATUM ; MARINE DIATOMS ; AMMONIUM LIMITATION ; TRANSIENT-RESPONSE ; LIMITING NUTRIENT ; SINGLE ADDITION ; CELL-CYCLE ; PHYTOPLANKTON
WOS IDWOS:000362980400004
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/27277
Collection淡水生态学研究中心
Affiliation1.Huazhong Agr Univ, Coll Fisheries, Wuhan 430070, Peoples R China
2.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Shi, Pengling,Shen, Hong,Wang, Wenjing,et al. The relationship between light intensity and nutrient uptake kinetics in six freshwater diatoms[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2015,34:28-36.
APA Shi, Pengling,Shen, Hong,Wang, Wenjing,Chen, Wenjie,&Xie, Ping.(2015).The relationship between light intensity and nutrient uptake kinetics in six freshwater diatoms.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,34,28-36.
MLA Shi, Pengling,et al."The relationship between light intensity and nutrient uptake kinetics in six freshwater diatoms".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 34(2015):28-36.
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