Research On The Spatial And Temporal Changes And Health Evaluation Of Mountains,Rivers,Forests,Fields,Lakes,Grasses And Seas In The Transitional Space Of Mountains,Rivers And Seas

The transitional space between mountains,rivers and seas is a complex space of natural and human interaction.It has differences and complexity and highlights the particularity of the relationship between man and land.It also has natural elements such as mountains,water,forests,fields,lakes,grass,and sea.A complex life community of mountains,rivers,forests,fields,lakes,and seas.The concept of"Landscapes,forests,fields,lakes and grasses is a community of life"is also an important part of the construction of ecological civilization.With the improvement of the social and economic level,the problem of ecological environment quality has become prominent,and the problem of difficult transitional regional governance has emerged.Therefore,it is necessary to carry out in-depth research on the health level of the landscape,forest,field,lake,grass,and sea life community in the transitional space of mountains,rivers and seas.It has a certain theoretical reference for the overall management of the regional landscape,forest,field,lake,grass and sea life community,and it will actively promote the development of the new complex system significance.From the perspective of the conjugation of mountains,rivers and seas,this paper uses 43counties(cities,districts)in the Karst-Beibu Gulf region in southwest Guangxi as evaluation units.First of all,the concept of the landscape,forest,field,lake,and sea life community in the transitional space between mountains,rivers and seas is sorted and summarized.Based on the previous research results and the actual situation of the study area,a health evaluation index system for the landscape,forest,field,lake,grass and sea life community is constructed.Secondly,the entropy method is used to determine the index weights,and the ENVI5.3,Arc GIS10.2 and Geo Da14.2 software platforms are used,and the spatial autocorrelation analysis method is used to analyze the three time series of landscapes,forests,lakes,and lakes in the study area in 2010,2015,and 2018.Explore the temporal and spatial characteristics of the spatial pattern of the Caohai Community of Life.Finally,use the HC model of health evaluation to analyze the health status of the landscape,forest,field,lake,and sea life community in the study area.Research indicates:(1)Mountains are concentrated in the northwest and southwest.Forests are widely distributed and concentrated in the west and central.The fields are mainly distributed in northwest river valleys and gentle slope hills and flat land and basins in the south.Waters and grasslands are distributed in scattered spaces.The global Moran’s I of each element of the three time series of landscape,forest,field,lake and grass life community from 2010 to 2018 are all positive,and there is a strong spatial autocorrelation in the spatial distribution;from the perspective of local spatial autocorrelation,the landscape of the study area The spatial distribution of grass life community has five types of related characteristics:HH,HL,LH,LL and insignificant.From 2010 to 2018,the areas of waters,lakes,and grasslands in the three time series study areas remained basically unchanged,while the areas of woodlands and fields gradually decreased,decreasing by 379.75km~2and 407km~2,respectively.(2)The overall health level of the mountain subsystem in 2018 is average,and its spatial distribution has the characteristics of a transition from general to good health from the northwest inland to the southeast coast.From 2010 to 2018,the overall health status of the water subsystem changed from a good level to a general level,and it was scattered.The overall health status of the forest subsystem has changed from an excellent level to a general level,showing a transitional distribution from an excellent level to a poor health level from the northwest to the southeast coast.The overall health status of the Tian and Cao sub-systems is firstly changed from a good level to a normal level and then to a good level.The good level is mainly distributed in the middle and southeast,the medium and poor levels are mainly distributed in the west and the north,and the grass system has different spatial levels.The spatial distribution of is similar to that of the forest subsystem.The overall health status of the marine subsystem is at a general level.(3)From 2010 to 2018,the coordination between landscapes,forests,fields,lakes,seas and people in the study area gradually improved.Those with excellent and good coordination were concentrated in the middle,southwest and northwest of the study area,while those with medium and poor levels The grades are mainly distributed in the southern coastal areas.In 2010,2015 and2018,the average comprehensive health index of the landscape,forest,field,lake and grass life community in the study area was 2.0634,2.1281 and 1.9728,and the overall health level of the three phases was in a healthy state.The healthy area is mainly distributed in the southeast hilly basin area,the sub-healthy area is widely distributed,the critical healthy area and the non-healthy area are dispersed,and the critical healthy area and the non-healthy area are mainly distributed in the karst area and the Beibu Gulf coastal zone.