| Looking back at the continuous growth of the wild crested ibis population in recent decades,the wild crested ibis has gradually migrated from the "core area" in the original national nature reserve to the low-altitude "experimental area" and the surrounding foodrich areas.Since 2012,the living space of wild crested ibis in the low-altitude areas of Yangxian County has been limited to a certain range,and the population nucleus density has increased,resulting in the "environmental carrying capacity" tending to the maximum value.In this paper,the relevant data of "bird conservation ecology" is used as the basis for the analysis of the habitat factors of crested ibis habitats,and the research on the individual "nutrient capacity" of birds is converted into a bird habitat based on the relevant theories of "landscape ecology".Research on "Space Capacity".Therefore,a set of analysis methods suitable for the "quantification of space capacity" of crested ibis habitats was explored,and the quantitative study of the wild crested ibis population was carried out in "town-level" units,and a reasonable optimization method for crested ibis habitat was proposed.Strategy to alleviate the contradiction between the growth of the wild crested ibis population and the number of crested ibis that can be accommodated by the habitat land cover resources,and finally solve the problem of the environmental carrying capacity of the wild crested ibis population.The main research contents of this paper are as follows:The main research contents of this paper are as follows:(1)Discussion on the space capacity of crested ibis under habitat factors.The behavior and habits of wild crested ibis were studied based on the survey data and related references,and the "habitat factor suitability","spatial pattern combination mode" and "chain growth rate" of crested ibis habitats in three periods were analyzed.Then,the habitat factor suitability of crested ibis habitat in the "wandering period" was divided by the calculation formula of "spatial capacity",and the prediction method of "quantification of spatial capacity" was proposed accordingly.(2)An analysis of the habitat pattern change of crested ibis in Yangxian County and a quantitative discussion of its spatial capacity.Based on the "mountain hill type" and "plain hill type" crested ibis habitats divided under the "spatial pattern" model,the "land transfer matrix","patch type scale" and "landscape scale" index analysis were carried out to study the crested ibis habitat.The impact of changes in habitat factors on wild crested ibis populations;using the prediction method of "quantitative space capacity",the "land transfer matrix" and "Markov model prediction" of crested ibis habitat were carried out,and combined with the calculation formula of "spatial capacity" The threshold of the average home range of crested ibis habitats was obtained,and the maximum number of wild crested ibis populations that could be accommodated by the land cover resources of each town in Yangxian County was obtained.Finally,make full use of the existing land cover resources in Yangxian County,with the goal of accommodating the maximum number of crested ibis,identify "suitable habitats for crested ibis",classify "protection safety levels",and build a "greenway ecological network".(3)Discussion on optimization methods and strategies of typical crested ibis habitat pattern under space capacity.Select typical crested ibis habitats,rationally optimize the crested ibis habitat pattern with different "scales" from the background of landscape architecture,and select important nodes of the "greenway ecological network" in the crested ibis habitat,and carry out "patch","patch",Corridor","matrix" and optimization of spatial combination mode and proposal of strategy. |
