Analysis on Changes of Landscape Connectivity in Nabanhe Nature Reserve

doi:10.13466/j.cnki.lyzygl.2021.01.014

Abstract

Abstract:

Nature reserves are important foundations for the protection of species,but frequent human activities cause the fragmentation of biological habitat patches in nature reserves.The quantitative evaluation of landscape connectivity plays an important role in the protection of biological habitats.This article takes Nabanhe Nature Reserve as the study area.Based on high spatial resolution remote sensing data in 2014 and 2018,the index method of graph theory is used to analyze the change of the landscape connectivity index of the habitat and changes of the landscape and connectivity driving factors in the protected area.The results are as follows:1) In the landscape connectivity index,the integral index of connectivity(IIC) and probability of connectivity(PC) both show a downward trend as IIC and PC index decrease by 0.29 and 0.53,respectively,from 2014 to 2018,indicating that habitat patch fragmentation has increased in the reserve;2) The importance index of the largest patch decreases from 85.14 to 84.19.The temporal and spatial changes of the top ten importance patches indicate that the area of habitat patches has been decreasing in the nature reserve,with significant fragmentation in the central and central-western regions;3) Land use changes has an important impact on the landscape connectivity of the protected area.The increased use of four types of land such as rubber forests,farmland,reservoir and tea gardens are the driving force for habitat fragmentation.The results will provide a scientific basis for habitat protection in Nabanhe Nature Reserve.

Key words: landscape connectivity, habitat, fragmentation, Nabanhe Nature Reserve

CLC Number:

P901
X826

SHEN Run, SHI Zhengtao, HE Guangxiong, LIN Yanhua. Analysis on Changes of Landscape Connectivity in Nabanhe Nature Reserve[J]. FOREST RESOURCES WANAGEMENT, 2021, (1): 103-110.

Figures/Tables 6

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地类	茶园	耕地	工矿	河流	火龙果	交通
林地	32.11	67.73	3.03	-49.89	-0.07	-60.1
地类	坑塘	裸土	水库	香蕉	橡胶	住宅
林地	-0.04	0.55	48.31	-14.43	457.62	-13.8