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题名: The C/N metabolic responses to water depth gradients and seasons in natural macrophyte populations
作者: Yuan, Guixiang1, 3; Fu, Hui1; Li, Wei2; Zhong, Jiayou1; Feng, Qian1; Ni, Leyi3; Xie, Ping3; Cao, Te3; Guo, Chunjing1; Lou, Qian1
关键词: Natural macrophyte population ; Potamogeton maackianus ; Free amino acid ; Soluble carbohydrate ; Starch
刊名: ECOLOGICAL ENGINEERING
发表日期: 2017-07-01
DOI: 10.1016/j.ecoleng.2017.04.003
卷: 104, 页:195-204
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine ; Technology
类目[WOS]: Ecology ; Engineering, Environmental ; Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology ; Engineering
英文摘要: Carbon (C) and nitrogen (N) metabolism are essential for the growth and maintenance of submersed macrophytes. They are affected by nutrient and light availability and seasonal changes. In this study, we investigated the changes of C/N metabolism and growth of three natural submersed macrophyte populations (i.e., each in a different site), Potamogeton maackianus, in response to water depth gradients with 0.5 m interval in a freshwater lake for four seasons. Changes were identified by measuring the biomass of the sampled macrophytes and metabolite contents of soluble carbohydrate (SC), starch, and free amino acid (FAA) in their organs. Results showed that no significant and consistent changes were found in the SC and FAA contents in leaves and stems from 1.0 m to 5.5 m water depth, as compared to previous results of controlled studies, suggesting a relative stable C/N metabolism in response to the depth gradients in studied natural populations of P. maackianus. The metabolite contents with the most variations appeared mainly because of seasonal changes. The metabolite contents of the macrophyte populations were more closely correlated with the chemical parameters than with the light parameters in water columns. No significant correlations were found between the metabolite contents with the light attenuation coefficient ($K$) and Secchi depth (SD) in water columns. The NO3-N and total phosphorus (TP) contents in water columns were positively correlated with the SC and starch contents in leaves, respectively. The NH4-N content in water columns was negatively related to the FAA content in leaves. Metabolite contents had weak correlations with depth gradients and light parameters, probably because of the physiological integration among individuals by developed stolons and the canopy-forming characteristic of this species. Our results highlighted the importance of water quality to the C/N metabolism in natural population of submersed macrophyte. (C) 2017 Elsevier B.V. All rights reserved.
关键词[WOS]: DISSOLVED INORGANIC CARBON ; 3 SUBMERSED MACROPHYTES ; AMINO-ACIDS ; MYRIOPHYLLUM-SPICATUM ; EURASIAN WATERMILFOIL ; SOLUBLE CARBOHYDRATE ; AQUATIC MACROPHYTES ; TYPHA-ANGUSTIFOLIA ; LIGHT AVAILABILITY ; NH4+ TOXICITY
语种: 英语
项目资助者: National Science Foundation of China(31400404 ; Science Foundation of Jiangxi Province of China(20161BAB214153 ; Science and Technology Program of Jiangxi Provincial Department of Water Resources(KT201303 ; Science Foundation of Jiangxi Institute of Water Sciences(sky201503) ; 31560145 ; 2015ZBBF6008) ; KT201509) ; 31560148 ; 51409133)
WOS记录号: WOS:000402834600019
ISSN号: 0925-8574
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/32098
Appears in Collections:淡水生态学研究中心_期刊论文

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作者单位: 1.Jiangxi Inst Water Sci, Jiangxi Prov Key Lab Water Resources & Environm P, Nanchang 330029, Jiangxi, Peoples R China
2.Nanchang Inst Technol, Res Inst Ecol & Environm Sci, Nanchang 330099, Jiangxi, Peoples R China
3.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Peoples R China
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