作 者：
孙永光;康婧;王伟伟;王传珺;付元宾;李培英;索安宁
单 位：
国家海洋环境监测中心;国家海洋局第一海洋研究所
关键词：
大长山岛;海岛植被;景观异质性;地形因素
摘 要：
海岛植被景观异质性作为海岛生态系统健康状况的重要表现形式之一,其变化过程与机制影响着海岛生态系统生态学过程。本文利用遥感技术和景观生态学方法,以大长山岛作为研究对象,识别了海岛植被景观异质性空间变异对地形因子的响应规律。结果表明:1)高程、坡度与植被景观异质性参数在空间上显著相关,并具有相似的变化趋势,与其负相关依次为:面积加权平均斑块分维数(AWMPFD)>总边缘长度(TE)>斑块数量(NP)>面积加权平均形状指数(AWMSI),与其呈正相关的为:平均斑块大小(MPS)>平均斑块边缘密度(MPE)。2)坡向对植被景观异质性影响不明显,在小尺度区域内,坡向与TE、MPE相关性不显著,与其他4个景观指数弱相关。
译 名：
Effect of topographical factors on spatial characteristics of island vegetation landscape heterogeneity: A case study with Dachangshan Island
作 者：
SUN Yong-guang;KANG Jing;WANG Wei-wei;WANG Chuan-jun;FU Yuan-bin;LI Pei-ying;SUO An-ning;National Marine Environmental Monitoring Center;The First Institute of Oceanography.State Oceanic Administration;
关键词：
Dachangshan Island;;island vegetation;;landscape heterogeneity;;topographical factors
摘 要：
The landscape heterogeneity of island vegetation is one of the important indicators of island ecosystem health,the change and mechanism for landscape heterogeneity affect ecological processes of island ecosystem. In this paper,we addressed the spatial distribution characteristics of spatial heterogeneity of Dachangshan Island vegetation landscape and their relationship with the topographical factors by using the remote sensing technology and landscape ecology approach. The results showed that landscape heterogeneity was mainly shaped by the topographical factors of elevation and slope in a similar way. Both elevation and slope were negatively correlated to the landscape heterogeneity parameters, including area-weighted mean patch fractal dimension( AWMPFD),total edge perimeter( TE),the number of patches( NP) and area-weighted mean shape index( AWMSI),and positively related to the middle patch size( MPS),mean patch edge density( MPE) in a descending order. The relationship between aspect and landscape heterogeneity index was much weaker when compared with slope and elevation in a small-scale area,aspect was not correlated with either TE or MPE,and only weakly correlated with other four landscape indices.
