扰动方式对湖泊营养盐及藻类生物量影响的模拟研究

doi:10.19741/j.issn.1673-4831.2019.0498

Abstract

Abstract: To understand the effect of disturbance modes on lacustrine nutrients and cyanobacterial blooms, an indoor simulative mixing experiment was conducted in July 2018 for 19 days. Results show that TN, TP and TDP concentrations decreased in the control group, intermittent disturbance group and continuous disturbance group. The concentrations of TN in the intermittent disturbance group showed the sharpest decline, and concentrations of TN differed significantly (P<0.05) among the three treatments. During the period of the experiment, the highest, medium and lowest mean values of TDP concentration were observed in the intermittent disturbance group, the control group and the continuous disturbance group, respectively. There were significant differences in TDP concentration between the intermittent disturbance and continuous disturbance groups (P<0.05). At the end of the experiment, the concentrations of Chl-a in the control group, intermittent disturbance group and continuous disturbance group were 251.8, 136.2 and 327.6 μg·L^-1, respectively. Concentrations of Chl-a differed significantly (P<0.05) among the three treatments. These results indicate that intermittent disturbance was conducive to nitrogen removal from lakes. Continuous disturbance at appropriate intensities may significantly increase Chl-a concentrations, thus benefitting algal accumulation and cyanobacterial blooms.

Key words: disturbance mode, nutrients, cyanobacterial bloom

CLC Number:

X524

ZHAO Jia-min, TIAN Wei, YANG Gui-jun, ZHANG Hong-liang, TANG Xiang-ming. Effects of Disturbance Modes on Lacustrine Nutrients and Algal Biomass: An Experiment Study[J]. Journal of Ecology and Rural Environment, 2020, 36(2): 234-241.

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Effects of Disturbance Modes on Lacustrine Nutrients and Algal Biomass: An Experiment Study

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