Can Hydrodynamics Change Phosphorus Strategies of Diatoms?-Nutrient Levels and Diatom Blooms in Lotic and Lentic Ecosystems
文献类型：期刊论文
| 作者 | Wang, Peili1,2; Shen, Hong1,2; Xie, Ping1,2; Xie, P (reprint author), Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol China, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China. |
| 刊名 | MICROBIAL ECOLOGY
 |
| 出版日期 | 2012-02-01 |
| 卷号 | 63期号:2页码:369-382 |
| 关键词 | Small-scale Turbulence Alkaline-phosphatase Activity Phytoplankton Community Structure Fresh-water Algae Organic Phosphorus Microcystis-aeruginosa Marine-phytoplankton Microcosm Experiment Growth-kinetics Atlantic-ocean |
| ISSN号 | 0095-3628 |
| DOI | 10.1007/s00248-011-9917-5 |
| 文献子类 | Article |
| 英文摘要 | Diatom blooms occur in many water bodies worldwide, causing significant ecological and social concerns. In order to understand the mechanisms of diatom blooms formation, the effects of varying phosphorus (P) concentration and hydrodynamics on the growth of diatoms were studied by combining results from field observations and laboratory experiments. The field investigation showed that spring diatom blooms (Cyclotella meneghiniana and Stephanodiscus hantzschii) occurred in Lake Taihu and Hanjiang River with similar environmental factors such as water temperature, pH, and dissolved oxygen in 2008. Concentrations of total phosphorus (TP), total nitrogen, and ammonia nitrogen (NH4-N) in Lake Taihu were significantly higher than the concentrations in the Hanjiang River. Laboratory experiments were conducted to evaluate growth and physiological responses of four lotic diatoms (Cyclotella atomus, Fragilaria crotonensis, Nitzschia palea, and S. hantzschii, isolated from the Hanjiang River) and three lentic diatoms (C. meneghiniana, Melosira varians, and Stephanodiscus minutulus, isolated from Lake Taihu, Lake Donghu, and Guanqiao Pond, respectively) to various P concentrations under small-scale turbulent and standing conditions. Our results showed that, with turbulence, lotic diatoms C. atomus, F. crotonensis, N. palea, and S. hantzschii demonstrated a significant increase in affinity for P compared with lentic diatoms C. meneghiniana, M. varians, and S. minutulus. Moreover, lotic diatoms C. atomus, F. crotonensis, and N. palea had higher growth rates and photosynthetic efficiencies with small-scale turbulence than with standing conditions both in P-limited and P-replete conditions. Lotic species S. hantzschii and three lentic diatoms (C. meneghiniana, M. varians, and S. minutulus) grew well under standing conditions. Our results may explain our field observation that the occurrence of diatom blooms in lakes is often associated with higher TP concentrations whereas in rivers, diatom blooms occur at a wide range of TP concentrations under flows. Therefore, different hydrodynamics and nutrient concentrations determined the dominant diatom species, according to their habitat-dependent physiological characteristics.; Diatom blooms occur in many water bodies worldwide, causing significant ecological and social concerns. In order to understand the mechanisms of diatom blooms formation, the effects of varying phosphorus (P) concentration and hydrodynamics on the growth of diatoms were studied by combining results from field observations and laboratory experiments. The field investigation showed that spring diatom blooms (Cyclotella meneghiniana and Stephanodiscus hantzschii) occurred in Lake Taihu and Hanjiang River with similar environmental factors such as water temperature, pH, and dissolved oxygen in 2008. Concentrations of total phosphorus (TP), total nitrogen, and ammonia nitrogen (NH4-N) in Lake Taihu were significantly higher than the concentrations in the Hanjiang River. Laboratory experiments were conducted to evaluate growth and physiological responses of four lotic diatoms (Cyclotella atomus, Fragilaria crotonensis, Nitzschia palea, and S. hantzschii, isolated from the Hanjiang River) and three lentic diatoms (C. meneghiniana, Melosira varians, and Stephanodiscus minutulus, isolated from Lake Taihu, Lake Donghu, and Guanqiao Pond, respectively) to various P concentrations under small-scale turbulent and standing conditions. Our results showed that, with turbulence, lotic diatoms C. atomus, F. crotonensis, N. palea, and S. hantzschii demonstrated a significant increase in affinity for P compared with lentic diatoms C. meneghiniana, M. varians, and S. minutulus. Moreover, lotic diatoms C. atomus, F. crotonensis, and N. palea had higher growth rates and photosynthetic efficiencies with small-scale turbulence than with standing conditions both in P-limited and P-replete conditions. Lotic species S. hantzschii and three lentic diatoms (C. meneghiniana, M. varians, and S. minutulus) grew well under standing conditions. Our results may explain our field observation that the occurrence of diatom blooms in lakes is often associated with higher TP concentrations whereas in rivers, diatom blooms occur at a wide range of TP concentrations under flows. Therefore, different hydrodynamics and nutrient concentrations determined the dominant diatom species, according to their habitat-dependent physiological characteristics. |
| WOS关键词 | SMALL-SCALE TURBULENCE ; ALKALINE-PHOSPHATASE ACTIVITY ; PHYTOPLANKTON COMMUNITY STRUCTURE ; FRESH-WATER ALGAE ; ORGANIC PHOSPHORUS ; MICROCYSTIS-AERUGINOSA ; MARINE-PHYTOPLANKTON ; MICROCOSM EXPERIMENT ; GROWTH-KINETICS ; ATLANTIC-OCEAN |
| WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Microbiology |
| 语种 | 英语 |
| WOS记录号 | WOS:000300316500013 |
| 资助机构 | Hubei Provincial Science and Technology Department[2008BCA004] ; Hubei Provincial Science and Technology Department[2008BCA004] ; Hubei Provincial Science and Technology Department[2008BCA004] ; Hubei Provincial Science and Technology Department[2008BCA004] |
| 公开日期 | 2012-09-25 |
| 源URL | [http://ir.ihb.ac.cn/handle/342005/16889]  |
| 专题 | 水生生物研究所_淡水生态学研究中心_期刊论文 |
| 通讯作者 | Xie, P (reprint author), Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol China, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China. |
| 作者单位 | 1.Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol China, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China 2.Huazhong Agr Univ, Coll Fisheries, Wuhan 430070, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Peili,Shen, Hong,Xie, Ping,et al. Can Hydrodynamics Change Phosphorus Strategies of Diatoms?-Nutrient Levels and Diatom Blooms in Lotic and Lentic Ecosystems[J]. MICROBIAL ECOLOGY,2012,63(2):369-382. |
| APA | Wang, Peili,Shen, Hong,Xie, Ping,&Xie, P .(2012).Can Hydrodynamics Change Phosphorus Strategies of Diatoms?-Nutrient Levels and Diatom Blooms in Lotic and Lentic Ecosystems.MICROBIAL ECOLOGY,63(2),369-382. |
| MLA | Wang, Peili,et al."Can Hydrodynamics Change Phosphorus Strategies of Diatoms?-Nutrient Levels and Diatom Blooms in Lotic and Lentic Ecosystems".MICROBIAL ECOLOGY 63.2(2012):369-382. |
入库方式： OAI收割
来源：水生生物研究所
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