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Method for determining habitat suitability

A habitat and suitability technology, applied in the field of determining habitat suitability and determining habitat suitability based on multiple linear regression, can solve problems such as ignoring the complexity of habitats and not being able to properly express natural water bodies

Inactive Publication Date: 2012-07-18
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Fish habitat selection is obviously a multivariate process, which is affected by multiple interacting variables. Existing calculation methods ignore the complexity of habitats and cannot properly express the situation of natural water bodies.

Method used

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  • Method for determining habitat suitability
  • Method for determining habitat suitability

Examples

Experimental program
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Embodiment 1

[0063] Below with two kinds of fishes of a watershed as embodiment further illustrate the present invention.

[0064] 1. Key species screening and data collection

[0065] The typical species fish 1 and fish 2 in a watershed were selected for analysis. The river flow in a certain basin is 5-30m 3 / s, 14 sets of comparative sampling were carried out in different rivers and seasons, and there were 668 river section units sampled, with an area of ​​5-50m 2 between. Fish were collected and identified by electric fish method in each river section unit. Randomly measure 5-10 water depths and 5-30 point flow velocities in the reach unit to obtain the frequency distribution of water depth and flow velocity. Different subsets obtained from different rivers were analyzed together because species information obtained from only one river is usually insufficient to fully reflect habitat preference.

[0066] 2. Multiple linear regression to establish the relationship between species re...

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Abstract

A method for establishing standards of habitat suitability includes the steps: firstly, determining typical fish species needing to be researched and life stages of the typical fish species in a researched river reach, researching the life stages and life habits of key species, performing unit division for the researched river reach and acquiring river reach habitat data; secondly, by means of a multiple linear regression method, respectively establishing habitat suitability functions represented by habitat variables and the habitat suitability represented by species response, and obtaining the relation between the species response and the habitat variables by combining the habitat suitability functions and the habitat suitability; and finally, solving regression coefficients of the species corresponding to a habitat variable relational expression by means of a least square method, and obtaining the habitat suitability standards established by means of the multiple linear regression method. The method can take interaction among the habitat variables into consideration, and determines response of the species by means of accumulative effects of multiple environmental characteristics, so that simulated results are more reasonable.

Description

technical field [0001] The invention belongs to the field of ecological environment protection, and relates to a method for determining habitat suitability, in particular to a method for determining habitat suitability based on multiple linear regression. Background technique [0002] Physical habitat environmental factors have a significant impact on fish populations and diversity, and biological communities also have special sensitivity and preference for habitat. Various environmental changes can directly or indirectly affect fish habitat preferences. At present, a variety of methods for establishing habitat suitability indicators have been developed to quantitatively describe the relationship between habitats and species. The classic method of habitat quantification is Habitat Suitability Index (Beecher HA, Caldwell BA, Demond SB. Evaluation of depth and velocity preferences of juvenile coho salmon in Washington streams[J]. North American Journal of Fisheries Management...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 易雨君
Owner BEIJING NORMAL UNIVERSITY
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