Changes on vegetation landscape pattern in the typical district of Yiluo River Valley—A case study from Luoning County,Henan Province

The changes on vegetation landscape pattern in the typical region of Yiluo River Valley show that the forest- covered area in the typical region has increased,but the landscape fragmentation turns serious,the patch numbers increase fiercely,the average area of patches decreases and the shape of various patches becomes simple increasingly,the regional distribution of patch trends to uniformity,and the distribution of patch trends to concentration.