Intermittent disturbance combined N and P adding favor colony size and abundance of Microcystis flos-aquae

IF 0.9 4区环境科学与生态学 Q4 LIMNOLOGY

Annales De Limnologie-international Journal of Limnology Pub Date : 2021-01-01 DOI:10.1051/limn/2021015

Guijun Yang, Chunni Zhong, Zheng Rui, Pan Wenwen, Guofeng Liu

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引用次数: 2

Abstract

Nutrients and disturbance are both important environmental factors in the freshwater ecosystem. Here we present data on the effects of intermittent disturbance (ID), nitrogen and phosphorus adding (+N+P), and intermittent disturbance combined N and P adding (ID+N+P) on colony size and abundance of Microcystis flos-aquae in lab experiments. Results showed that the mean colony sizes of M. flos-aquae in ID+N+P group were1.68, 1.56, 1.17 times that in the control, +N+P, ID groups, respectively. Moreover, the average number of M. flos-aquae in ID+N+P group were 1.47, 1.19, 1.42 times those in the control, +N+P, ID groups, respectively. The average concentration of EPS (extracellular polysaccharides) in ID and ID+N+P group was significantly higher than those in control and +N+P groups. Results demonstrated that intermittent disturbance combined N and P adding promoted colony size and abundance of M. flos-aquae. These results suggest that intermittent disturbance combined N and P adding plays an important role in the formation of Microcystis blooms in freshwater ecosystems.

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间歇加氮加磷有利于藻微囊藻的菌落大小和丰度

营养和干扰都是淡水生态系统的重要环境因子。本文研究了间歇干扰(ID) +氮磷添加(+N+P)和间歇干扰联合氮磷添加(ID+N+P)对水藻微囊藻菌落大小和丰度的影响。结果表明，ID+N+P组水蚤平均菌落大小分别是对照、+N+P、ID组的1.68倍、1.56倍、1.17倍;ID+N+P组水蚤平均数量分别是对照、+N+P、ID组的1.47、1.19、1.42倍。ID组和ID+N+P组细胞外多糖平均浓度显著高于对照组和+N+P组。结果表明，施氮加磷的间歇干扰可促进褐花蓟马群落的大小和丰度。上述结果表明，氮磷复合间歇扰动在淡水生态系统微囊藻华的形成中起着重要作用。

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来源期刊

Annales De Limnologie-international Journal of Limnology 地学-湖沼学

CiteScore

2.20

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Annales de Limnologie - International Journal of Limnology publishes papers on the ecology of freshwater systems, ranging from studies of aquatic organisms, physical and chemical works which relate to the biological environment, to ecological applications and frameworks for water management directives. Main topics: Ecology of freshwater systems ; biodiversity, taxonomy, distribution patterns in space and time, biology of animals and plants ; experimental and conceptual studies which integrate laboratory and/or field work on physiology, population dynamics, biogeochemistry and nutrient dynamics, management, mathematical modelling ; techniques for sampling and chemical analyses, ecological applications, procedures which provide frameworks for environmental legislation.