Ecological reference value calculating method based on plankton community change

Abstract

The invention discloses an ecological reference value calculating method based on plankton community change. Ecological reference values of taihu lake basins and liao river basins in China are calculated by adopting a synthetical index method according to physical and chemical factors. A preliminary calculating framework is as follows: 1, determining a basin water environment ecological reference point and an ecological reference index; 2, making a BOX distribution map of each reference index of the reference point and giving a mark; and 3, weighing the marks of the ecological reference indexes, and taking the mark of 90 as the reference value of the basin. The establishment of an ecological reference can be used for evaluating the completeness of the structure and function of a water ecological system; and probably ignored potential problems during evaluation and analysis of other water quality references can be found out conveniently.

Description

Technical field: [0001] The invention belongs to the field of formulation of water quality benchmarks in environmental science, and is based on the response of plankton communities to changes in environmental pressure in my country, combined with physical and chemical factors, and adopts the Multimeric Index method to calculate the ecological benchmark values ​​of lakes and rivers, and evaluates the relationship between lakes and rivers. ecological health of the river. Background technique: [0002] In the 1960s, the United States launched the research and formulation of water quality standards, including Human Health Criteria, Aquatic Life Criteria, Sediment Quality Criteria and Biology Criteria. A series of benchmark index systems including Biological Criteria, among which the most commonly used water quality benchmark derivation method is the double standard in the "Technical Guidelines for Deriving Numerical National Water Quality Standards for the Protection of Aquatic Or...

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Problems solved by technology

[0003] The derivation methods of the above-mentioned benchmarks are established based on toxicological methods, and the pollutants are determined by studying the toxic effects of pollutants on sensitive organisms (EPA points out that the toxicity data deduced to the benchmarks involve at least 3 phyla and 8 families of organisms). The baseline value. The idea of ​​these baseline derivation methods is that as long as the sensitive species in the biome can be protected, the entire biological community can be protected (at least 95%, EPA). However, this baseline derivation method ignores the interspecies relationship of organisms (symbiosis, symbiosis, predation, competition, parasitism, etc.) and intra-species relationships (intra-species mutual assistance, intra-species struggle), this relationship will cause the toxic effects of pollutants on individual organisms to be different from those on biological communities. Plankton is a water body It is an important biological community in phytoplankton. It has a wide coverage, fast reproduction, is sensitive to environmental changes, and is at the bottom of the trophic pyramid. It can be used as an indicator biological community. This paper studies the establishment of water quality benchmarks based on plankton communities from an ecological point of view.

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