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Fresh water ecosystem health evaluation method

An ecosystem and evaluation method technology, applied in the field of environmental pollution monitoring and evaluation, can solve the problems of complex operation, low efficiency and low evaluation accuracy, and achieve the effect of simple operation process, high accuracy and sensitive reflection.

Pending Publication Date: 2021-11-16
PEKING UNIV +1
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Problems solved by technology

[0005] However, the above-mentioned existing methods for constructing the biological integrity index have problems such as complicated operation, low efficiency and low evaluation accuracy in the actual practice process.

Method used

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Experimental program
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Effect test

Embodiment 1

[0112] Embodiment 1 (the implementation process of this embodiment please refer to figure 2 ):

[0113] 1) Sample collection and pretreatment

[0114]26 sections were set up in the middle reaches of the Yellow River, and field parameters such as DO (dissolved oxygen), T (temperature), and pH were measured at each section on site, and 500mL surface water samples were collected and brought back to the laboratory for low temperature storage, and total nitrogen was measured within 48 hours , total phosphorus and potassium permanganate index and other water quality parameters. For each section, 1.0 L of surface water samples containing plankton cells (about 0.5 m below the water surface) were collected, and pre-filtered with a stainless steel sieve with a pore size of 200 μm to filter out large particles of impurities above 200 μm.

[0115] The 1.0L pretreated water sample was vacuum filtered with a filter membrane with a pore size of 0.22 μm, and the filter membrane was stored ...

Embodiment 2

[0133] Embodiment 2 (comparative example):

[0134] After years of research by experts from various countries, the construction of the biological integrity index has become increasingly mature in terms of theoretical basis and technical methods. More and more researchers use the IBI index to evaluate the health status of aquatic ecosystems, and its wide application reflects the feasibility of the method.

[0135] However, the inventors found that due to the complexity of the structure of the water ecosystem and the richness of functions, the IBI index still has the following problems both in terms of theoretical basis and construction methods:

[0136] 1) There is no complete candidate biological status parameter index database: as a country with vast water areas, it is necessary to establish a guiding parameter index database for the evaluation of the integrity of my country's water ecosystems based on geographical and hydrological characteristics, in order to evaluate the wa...

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Abstract

The invention provides a fresh water ecosystem health evaluation method. The method comprises the steps: calculating the species number of a classification unit, the Shannon-Wienner diversity index, the relative abundance of pollution sensitive species, the relative abundance of anaerobic species and the species network modularization coefficient on the basis of the high-throughput sequencing technology, calculating the plankton integrity index through standardized parameters, and performing evaluation on the basis of the calculation result. According to the method, the anaerobic species relative abundance and the species network modularization coefficient are put forward for the first time, and the two indexes are combined with existing representative indexes to comprehensively reflect the influence of environmental changes on the plankton species richness, species diversity, pollution sensitivity, pollution tolerance and water ecological functions, so the evaluation accuracy is improved; and the evaluation process is simplified by proposing and combining the two indexes. Therefore, the method provided by the invention can quickly, accurately and sensitively reflect the health condition of the fresh water ecosystem, and is helpful for watershed managers to implement accurate and effective treatment measures.

Description

technical field [0001] The invention relates to the technical field of environmental pollution monitoring and evaluation, and mainly relates to a freshwater ecosystem health evaluation method. Background technique [0002] Fresh water resources are composed of water in rivers and lakes, mountain snow, glaciers and groundwater. In recent years, with the rapid development of economy and society, excessive human interference and insufficient protection have resulted in deterioration of freshwater quality, changes in hydrological conditions, habitat degradation, and disappearance of important or sensitive organisms in some areas, and even caused serious consequences that are irreparable. Therefore, it is of great significance to carry out freshwater ecosystem health evaluation research, establish effective evaluation indicators and scientific methods, and accurately diagnose the health status of freshwater ecosystems for the sustainable utilization and management of freshwater r...

Claims

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Application Information

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IPC IPC(8): G16B30/00G16B40/20
CPCG16B30/00G16B40/20Y02A20/152
Inventor 籍国东罗忠新隋欣党正柱
Owner PEKING UNIV
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