| The establishment of an ecological security pattern can stabilize the ecosystem structure,enriching regional biodiversity,and enhance the ecological level.It is the main way to build regional ecological civilization.Gaoling is not only a base of agricultural products towards Asia and Europe in the construction of the “Belt and Road” initiative,but also plays a vital role in the Weibei Industrial Corridor and Wei River Ecological Zone.To keep ecology safer,a reasonable ecological security pattern that can consummate the ecological network and balance development and protection is supposed to be built.This article first starts from the background of ecological land in Gaoling and view the landscape pattern traits which were evaluated by the index of type and landscape,to identify the regional ecological problems and reckon the comprehensive score of the landscape index;then analyze the influence of external threats on the quality service function of the regional ecological land and use this as a basis for identification,and based on habitat quality evaluation,identify regional ecological networks by using MCR model;finally,in accordance with the results of both,the ecological security pattern of Gaoling is comprehensively established to enhance the regional ecological level and stabilize the regional ecological system structure.The research conclusions are as follows:(1)Determine that 30 m particle size is the optimal regional research scale,to comprehensively analyze the landscape traits of Gaoling.Recognize problems such as the ecological effectiveness cannot fully come into play on account of the excessive fragmentation,and the overall connectivity of the ecological landscape is relatively good,however the spatial connection between various categories is insufficient.(2)The average habitat quality index of Gaoling is 0.3,and the habitat quality levels are concentrated in Class V and Class III,however Class I functional areas only account for about17%,which are only concentrated in the Jing River and Wei River regions.And there is a lack of transition between the Class I functional areas in the Jing River area and the low-quality functional areas on both sides of the bank.Ecological protection is facing great pressure,and the protection function of regional biodiversity is low as a whole.(3)Identify 10 ecological source areas;by using MCR model,obtain 36 potential ecological corridors,and recognize 30 ecological nodes;generate a majorizing regional ecological network by the gravity model,to divide the corridors into 11 important ones and 13 general ones,meanwhile 16 ecological nodes were recognized.(4)In view of the landscape pattern and ecological network,completing the ecological network components,meanwhile analyzing the construction width of corridors and nodes.Recognizing the ecological security protection components of Gaoling,which consists of 11 ecological sources,11 important ecological corridors,15 general ecological corridors and 12 biological recreation areas,finally having built an ecological security system that covering ecological security protection components,different categories of protection areas and protection measures. |
