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Preliminary Study the Symbols of Wetland Ecological Security and Wetland Ecological Security Assessment Index System

Author: YangXiuLin
Tutor: XuLinShu
School: Northeast Normal University
Course: Physical Geography
Keywords: Wetlands Ecological security Index system Mark
CLC: X826
Type: Master's thesis
Year: 2009
Downloads: 476
Quote: 5
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Abstract


Wetlands are important ecosystems in the global scale, play a huge ecological function, to carry out the practical significance of the wetland ecological safety of the study in the current context of global change. The wetland ecological security is to maintain the continuity of the wetland ecosystem processes, the integrity of the stability of the wetland ecosystem structure and function of wetland ecosystems. First, the analysis of the wetland ecological safety signs. As water resources wetlands remained the dominant factor, water protection wetlands safety foremost environmental conditions. Wetlands with water conservation, climate regulation, groundwater recharge, degradation and pollution and other functions, a certain area on the basis of wetlands. Wetlands to maintain a certain area, to maintain and protect the water source protection and wetlands comprehensive reflection and intuitive performance. Wetland landscape pattern stability, safety of wetlands on the landscape. Wetland bio-diversity of the population is concentrated expression of the normal functioning of the ecological functions of wetlands. Population diversity and integrity of wetland vegetation, the basis for the normal functioning of wetlands. Division of wetland types, in essence, the difference is formed wetland ecological environment. A variety of different types of wetlands constitute a functional wetland ecosystem. The steady state of the internal structure of the wetland system from one side of the security situation of the wetland system. The process of normalization of the wetlands, the nature of the security of the wetlands. In the framework of laws and regulations, wetland protection may be more credible, effective control of the behavior of big development, destruction of wetlands, the protection of wetlands protected by law. This is a security policy embodied in wetlands. Secondly, the analysis of the previous wetland ecological security evaluation existence of major issues, such as the ecology of wetlands need water threshold value of the confirmation, wetlands safety of the smallest area of ??analysis, wetland landscape pattern of reasonableness, wetland biological populations of integrity, wetland ecological safety evaluation of regional process of the wetlands on the support of the safety evaluation, quantitative evaluation. Again, based on the above analysis, the pressure - state - response model based on wetland ecological safety evaluation index system. In specific wetland evaluation, it is necessary to select the appropriate set of indicators to evaluate. Finally, In this paper, the evaluation index system is inadequate, and the need to constantly improve in future studies.

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CLC: > Environmental science, safety science > Environmental Quality Assessment and Environmental Monitoring > Analysis and Evaluation of Environmental Quality > Biological assessment, ecological assessment
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