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首页> 外文期刊>Harmful Algae >Analysis of environmental drivers influencing interspecific variations and associations among bloom-forming cyanobacteria in large, shallow eutrophic lakes
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Analysis of environmental drivers influencing interspecific variations and associations among bloom-forming cyanobacteria in large, shallow eutrophic lakes

机译：影响大型浅兴奋湖泊盛开型蓝藻间隙变异和关联的环境驱动因素分析

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摘要

Non-diazotrophic Microcystis and filamentous N-2-fixing Aphanizomenon and Dolichosperrnum (formerly Anabaena) co-occur or successively dominate freshwaters globally. Previous studies indicate that dual nitrogen (N) and phosphorus (P) reduction is needed to control cyanobacterial blooms; however, N limitation may cause replacement of non- N-2-fixing by N-2-fixing taxa. To evaluate potentially counterproductive scenarios, the effects of temperature, nutrients, and zooplankton on the spatio-temporal variations of cyanobacteria were investigated in three large, shallow eutrophic lakes in China. The results illustrate that the community composition of cyanobacteria is primarily driven by physical factors and the zooplankton community, and their interactions. Niche differentiation between Microcystis and two N-2-fixing taxa in Lake Taihu and Lake Chaohu was observed, whereas small temperature fluctuations in Lake Dianchi supported co-dominance. Through structural equation modelling, predictor variables were aggregated into 'composites' representing their combined effects on species-specific biomass. The model results showed that Microcystis biomass was affected by water temperature and P concentrations across the studied lakes. The biomass of two filamentous taxa, by contrast, exhibited lake-specific responses. Understanding of driving forces of the succession and competition among bloom-forming cyanobacteria will help to guide lake restoration in the context of climate warming and N:P stoichiometry imbalances.
机译：非真正营养的微囊杆菌和丝状N-2固定的Aphanizomenon和Dolichosperrnum（以前的Anabaena）共同发生或连续地占全球新水域。以前的研究表明，需要双氮（N）和磷（P）降低来控制蓝藻绽放;然而，N个限制可能导致通过N-2固定的分类纳替代非N-2固定。为了评估潜在的对策情景，在中国三大浅兴奋湖泊中研究了温度，营养素和浮游动物对蓝藻的时空变化的影响。结果表明，蓝藻的群落组成主要由物理因素和浮游动物群落驱动及其相互作用。观察到微囊杆菌和太湖湖和巢湖湖中的两种N-2固定分类的利基差异，而滇池湖的小温度波动支持共同统治。通过结构方程建模，预测变量被聚集成“复合材料”，其代表其对物种特异性生物质的组合效果。模型结果表明，微囊体生物质受到研究湖泊水温和P浓度的影响。相比之下，两种丝状分类群的生物量表现出特定湖泊的反应。了解盛开的蓝藻继承和竞争的驱动力将有助于在气候变暖的背景下引导湖泊恢复和N：P化学计量不平衡。

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  • 来源
    《Harmful Algae》 |2019年第4期|84-94|共11页
  • 作者

    Shan Kun; Song Lirong; Chen Wei; Li Lin; Liu Liming; Wu Yanlong; Jia Yunlu; Zhou Qichao; Peng Liang;

  • 作者单位

    Chinese Acad Sci Inst Hydrobiol State Key Lab Freshwater Ecol & Biotechnol Wuhan 430072 Hubei Peoples R China|Chinese Acad Sci Chongqing Inst Green & Intelligent Technol Big Data Min & Applicat Ctr Chongqing 400714 Peoples R China;

    Chinese Acad Sci Inst Hydrobiol State Key Lab Freshwater Ecol & Biotechnol Wuhan 430072 Hubei Peoples R China|Univ Chinese Acad Sci Beijing 100049 Peoples R China;

    Chinese Acad Sci Inst Hydrobiol State Key Lab Freshwater Ecol & Biotechnol Wuhan 430072 Hubei Peoples R China;

    Chinese Acad Sci Inst Hydrobiol State Key Lab Freshwater Ecol & Biotechnol Wuhan 430072 Hubei Peoples R China;

    Chinese Acad Sci Inst Hydrobiol State Key Lab Freshwater Ecol & Biotechnol Wuhan 430072 Hubei Peoples R China;

    Chinese Acad Sci Inst Hydrobiol State Key Lab Freshwater Ecol & Biotechnol Wuhan 430072 Hubei Peoples R China;

    Chinese Acad Sci Inst Hydrobiol State Key Lab Freshwater Ecol & Biotechnol Wuhan 430072 Hubei Peoples R China;

    Chinese Acad Sci Inst Hydrobiol State Key Lab Freshwater Ecol & Biotechnol Wuhan 430072 Hubei Peoples R China;

    Chinese Acad Sci Inst Hydrobiol State Key Lab Freshwater Ecol & Biotechnol Wuhan 430072 Hubei Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Cyanobacterial blooms; Microcystis; Dolichospermum; Aphanizomenon; Eutrophication; Lake Taihu; Lake Chaohu; Lake Dianchi;

    机译：蓝细菌绽放;微囊杆菌;Dolichospermum;Aphanizomenon;富营养化;太湖湖;巢湖湖;滇池湖;

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