海洋科学2016，Vol.40Issue(2)：84-93,10.DOI:10.11759/hykx20131218001
50年来北海市滨海湿地景观格局变化及其驱动机制
Change and driving mechanism of landscape patterns in the coastal wetland of Beihai City in the last 50 years
摘要
Abstract
With landscape ecology theory as a basis, we studied the landscape pattern of Beihai’s costal wetland and its dynamic changes over the past 50 years (1955—2004) using remote sensing images as the data source in addition to a field survey. The results show that over the past 50 years, Beihai’s coastal wetland has experienced a degrada-tion trend, with decreases in the inter-tidal sandy beaches, inter-tidal silt beach, mangrove beach, and small-sized island wetland. The landscape pattern indexes indicate that 1977 and 1998 witnessed obvious changes to Beihai’s coastal wetland. In 1977, the impact of human activities increased, which caused a slight degradation in the coastal wetland, as indicated by the increased dominance index of the wetland landscape, decreases in the diversity and evenness indices, and a reduction in the total landscape area index to its minimum. In 1988, wetland protection ef-forts were enhanced, and the wetland recovered somewhat. For instance, the landscape diversity index, dominance index, and evenness index showed opposite patterns. Due to the increased levels of extreme weather and human disturbance to the wetlands in 1998, its mean patch fractal dimension decreased, while the patch density and land-scape fragmentation indices reached their maxima. Changes in the wetland landscape pattern index reflected the influence of the following factors on the landscape pattern: reclamation transformation, biological invasion of spartina alterniflora, urban pollution, and extreme weather disasters. Of these factors, human activities were the major driving force behind the changes in the landscape pattern of the coastal wetland in Beihai.关键词
滨海湿地/遥感/景观格局/景观指数/北海市Key words
coastal wetlands/remote sensing/landscape pattern/landscape pattern index/Beihai City分类
海洋科学引用本文复制引用
梁文,胡自宁,黎广钊,宋垠先,余克服,农华琼..50年来北海市滨海湿地景观格局变化及其驱动机制[J].海洋科学,2016,40(2):84-93,10.基金项目
广西自然科学基金重大项目(2012GXNSFEA053001) （2012GXNSFEA053001）
国家自然科学基金项目(41203074) （41203074）
北海市科技局基础研究项目(北科合200601055) （北科合200601055）
广西自然科学基金项目(桂科基0575025)@@@@ Major Program of Natural Science Foundation of Guangxi of China, No.2012GXNSFEA053001 （桂科基0575025）
National Natural Science Foundation of China, No.41203074 （）
Basic Research Project of Basic Research Beihai bureau of science & technology Guangxi of China, No.200601055 （）
Natural Science Foundation of Guangxi of China, No.0575025。 （）
