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Forest Ecology Security Assessment for Yanping District

Author: ChenWei
Tutor: ZhengDeXiang
School: Fujian Agriculture and Forestry University
Course: Forestry
Keywords: Yanping Forest ecological security Evaluation system Analytic Hierarchy Process Fuzzy Comprehensive Evaluation Method Single factor contribution
CLC: S718.5
Type: Master's thesis
Year: 2009
Downloads: 64
Quote: 1
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Abstract


Sustainable theory, the theory of system security, ecological carrying capacity theory to explore the relationship of forest ecological security and the economy, society, resources, science and technology, culture and other factors; obtained through the survey of 30 forestry experts and local old forestry workers research-based data to pressure - state - response conceptual model as the basis to establish the Yanping District forest ecological security evaluation index system, to establish evaluation index; using AHP to determine the different levels of evaluation index weights, fuzzy comprehensive evaluation method to determine of Yanping forest ecological security levels, quantified by evaluating set, linear weighted sum method to calculate the of Yanping forest ecological security index; single index score values ??and their rights in the system re-determine the extent of the contribution of a specific indicator Rank score. The purpose of this study is to provide a theoretical basis for the the Yanping forest ecological environment construction. The main contents and conclusions are as follows: (1) forest ecological security and regional economic conditions, social conditions, forest resources inventory and configuration, technological and cultural progress and other factors are closely related. (2) In support of the relevant theory is fully analyzed and screening, to determine the 22 evaluation Yanping forest ecosystems basic indicators of the level of security. (3) AHP to determine the specific indicators of the different levels of weight. After the index weights importance Sort found that the per capita ecological forest area, all levels of government financial investment in the ecological forest per capita volume, ecosystem diversity index weight, a greater impact on the the Yanping forest ecosystem security. (4) Yanping forest ecosystems fuzzy comprehensive evaluation method to determine the level of security, index vector B = (0 .18080.44430.28600.0889), is determined based on the maximum degree of membership of the overall ecological safety in good condition; comments set quantified after The Composite Index 74.34 points, between good and moderate. Various subsystems index vector are: B1 = [0 .15930.51750.29230.0294] B2 = [0 .22890.38100.28330.0985]; B3 = [0 .11890.56750.32810.1652] (5) calculated by the formula j specific factor Yanping impact of forest ecological security index. Show: nine indicators play a positive role, especially indicators C1 8, C 17, C3, C6 Composite Index greater impact on the ecological security index; play a negative role in the composite index of 13 indicators, and indicators C1 9, C20, C11, C12 Composite Index was the biggest drag.

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CLC: > Agricultural Sciences > Forestry > Forestry basic science > Forest Biology > Forest Ecology
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