Method for judging key species of food web

A food web, a key technology, applied in the field of ecology to avoid the extinction of key species, improve accuracy and timeliness, and maintain stability

Active Publication Date: 2019-08-16
INST OF DISASTER PREVENTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method strongly relies on experiments, which are not only limited by the experimental conditions in nature, but also by the experimental time, the type of target species to be removed, etc. Not all food webs can carry out removal experiments in reality

Method used

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  • Method for judging key species of food web
  • Method for judging key species of food web
  • Method for judging key species of food web

Examples

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Embodiment 1

[0063] Example 1: Determination of key species in aquatic food webs in river ecosystems

[0064] This embodiment takes the aquatic food web of the river ecosystem as an example to further illustrate the present invention.

[0065]1. Construct the species interaction matrix in the food web

[0066] In this example, the aquatic food web includes 48 species, and the species interaction matrix is ​​constructed according to whether there is a direct interaction between the species. The elements in the interaction matrix are 0 or 1. When the matrix element is 1, it means that there is a direct interaction between species i and species j. When the matrix element is 0, it means that there is no direct interaction between species i and species j. effect.

[0067] 2. Calculate the centrality characteristics of species

[0068] Species are used as nodes. When the matrix element is 1, there is an edge between the corresponding nodes; when the matrix element is 0, there is no edge betwe...

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Abstract

The invention relates to a method for judging key species of a food web, and belongs to the field of ecology. According to the technical scheme, the method comprises steps of constructing a species interaction matrix in the food web; calculating two or more centrality characteristics of the species; utilizing centrality characteristics to carry out clustering analysis on the species without the need of specifying a pre-specified classification number; counting the number of species in each category; removing species in different categories, and respectively calculating the robustness of the food net after the species are removed; comparing the food web robustness change degrees; and selecting the species with the strongest change degree as key species. The method is helpful for people to timely and accurately judge which species in the food net belong to key species, the accuracy and timeliness of species protection are improved, the key species are preferentially protected in numerousspecies, and key species extinction caused by improper protection and subsequent secondary species extinction and food web collapse possibly caused by improper protection are avoided.

Description

technical field [0001] The invention relates to the field of ecology and is used to quantitatively determine key species in food webs. Background technique [0002] Species interact to form a food web. Species that play an important role in the top trophic level or low trophic level in the food web are called keystone species. The removal of keystone species can lead to drastic changes or even collapse of the food web. The protection of keystone species is an important aspect of maintaining the stability of food webs and even ecosystems, because the loss of keystone species not only means the extinction of individual species but also causes secondary extinction of food webs, that is, species directly or indirectly related to keystone species will also become extinct. [0003] Keystone species are important targets for priority protection when carrying out species protection work. How to determine which species are keystone species in the food web is a basic problem that n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62
CPCG06F18/2321G06F18/24
Inventor 唐毅王凤珍
Owner INST OF DISASTER PREVENTION
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