Microbial network-based method for assessing risk of environmental pollution

Abstract

The invention relates to a microbial network-based method for assessing the risk of environmental pollution. The method is mainly used for assessing the risk of pollution of environmental media such as soil, surface water, underground water and bottom mud. The method comprises the following steps: obtaining microbial community structure and relative abundance data of an environmental sample through metagenome sequencing, and obtaining basic environmental indexes of the corresponding sample at the same time; and constructing a microorganism interaction network model according to the dominant microorganisms and the key environment indexes. The stability of the environmental micro-ecosystem is evaluated through the positive and negative correlation ratio and the network average degree changein the microorganism coexistence relationship. The negative correlation ratio is reduced to indicate that the environmental pollution risk is increased. Proper environmental pollution prevention measures need to be taken. Compared with a conventional method for monitoring and evaluating environmental pollution based on a plurality of environmental physicochemical indexes, the environmental pollution monitoring and evaluating method based on the ecological statistics can make a pre-judgment before the occurrence of pollution, and is helpful for a monitor to make a timely and accurate judgment on the environmental pollution prevention and control opportunity.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution assessment, in particular to a method for assessing environmental pollution risks based on microbial networks. Background technique [0002] Environmental pollution refers to harmful substances that pollute the atmosphere, water, soil, animals and plants to a harmful degree (physical pollution, chemical pollution, biological pollution, etc.). Usually, my country monitors and controls pollution by formulating pollution risk management and control standards for different environmental media. To prevent environmental pollution, the basic indicators such as cadmium, mercury, arsenic, and lead are used as the basic items of the soil pollution risk screening value of agricultural land, and the total amount of HCH, the total amount of DDT and benzo[a]pyrene are selected as pollutants to be measured project to assess the risk of soil contamination on agricultural land. However, due to the w...

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Problems solved by technology

However, these methods do not consider the influence of environmental factors when estimating the association between microorganisms, and ignore the hidden microbial coexistence information in the construction of a larger interaction network between environmental factors and microbial communities.

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