普生轮藻浸提液对两种淡水藻类的化感抑制作用及其数学模型

发布时间：2018-01-05 05:22

本文关键词：普生轮藻浸提液对两种淡水藻类的化感抑制作用及其数学模型　出处：《生态学报》2014年06期 　论文类型：期刊论文

【摘要】：利用大型水生植物的化感作用抑制水华藻类是水域生态学研究的热点课题之一。探讨了不同浓度普生轮藻浸提液对产毒铜绿微囊藻和斜生栅藻(单纯以及混合藻类)的抑制作用,并根据实验过程中得到的数据和数据特征,在传统的Logistic模型和Lotka-Volterra模型基础上,通过微元法建立了普生轮藻浸提液对单纯产毒铜绿微囊藻、单纯斜生栅藻抑制的数学模型以及两藻混合时抑制的数学模型。结果表明,(1)普生轮藻浸提液无论对单独的毒性铜绿微囊藻或斜生栅藻还是共生状态的毒性铜绿微囊藻和斜生栅藻均有很强抑制作用,且对毒性铜绿微囊藻的抑制作用要显著高于对斜生栅藻;(2)所建立的抑藻模型可有效表征和预测在一定范围内的产毒铜绿微囊藻、斜生栅藻及其混合藻在普生轮藻浸提液胁迫下藻密度随时间变化的规律;通过这些模型可方便地计算出实验期间任何时间节点上普生轮藻浸提液的半抑制浓度(EC50)、最小有效浓度(MIC)等指标的预测值、混合藻在小生境中相对稳定时的预测值等等。该研究可为实际抑藻的方案制定和实施提供有价值的数据支撑和参考,具有一定的理论与应用意义。
[Abstract]:The use of large aquatic plant allelopathy inhibition of algae is one of hot research topics in ecology. The effects of different concentration of Chara vulgaris L. extracts on toxic Microcystis aeruginosa and Scenedesmus (pure and mixed algae) inhibition, and according to the characteristics of data and data obtained in the experiment, in the traditional the Logistic model and Lotka-Volterra model, was derived by the infinitesimal element method Chara vulgaris L. extracts on pure toxic Microcystis aeruginosa, a simple mathematical model of algal inhibition and inhibition of two algae mixed mathematical model. The results show that (1) both Chara vulgaris L. extracts on toxicity of Microcystis aeruginosa alone or in Scenedesmus or symbiotic state of toxic Microcystis aeruginosa and Scenedesmus showed strong inhibition, and the inhibition of the toxicity of Microcystis aeruginosa was significantly higher than that of s.obliquus; (2) The algal model can effectively characterize and predict in a range of toxic Microcystis aeruginosa, Scenedesmus and mixed algae in Chara vulgaris L. extracts under stress of algal density changes with time; based on these models can be calculated conveniently at any time during the experiment node extraction Chara vulgaris L. the liquid half inhibitory concentration (EC50), minimum effective concentration (MIC) prediction index value, forecast mixed algae is relatively stable in niche when values and so on. The aim was to study the actual algal plan formulation and implementation to provide support and reference value of the data, it has theoretical and practical significance.

【作者单位】：安徽师范大学数学计算机科学学院;安徽师范大学生命科学学院;
【基金】：国家自然科学基金项目(31170443) 安徽省高校省级自然科学研究重点项目(KJ2013A139)
【分类号】：Q946;X524
【正文快照】： 湖泊富营养化及其导致的蓝藻水华暴发是目前较为突出的环境问题之一。蓝藻水华肆虐,不仅对生态环境造成严重危害,其释放的蓝藻毒素可被水生生物吸收和累积,并随食物链传递,对人类的健康造成极大威胁[1-2],因此,对蓝藻水华的预防和治理是当前迫切需要解决的重要课题。传统的除

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