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2001-2016年福建省海岸带植被覆盖变化特征
乔文慧, 王强
福建师范大学 地理科学学院, 福建 福州 350007
摘要:
[目的] 揭示福建省海岸带地表植被覆盖空间格局变化,为开展基于主体功能区类型的资源环境监测与预警提供决策参考。[方法] 基于归一化植被指数(NDVI)像元二分模型,选用2001,2006,2011,2016年Landsat系列遥感数据,评估研究区植被覆盖度以表征评价区域生态承载力变化。[结果] ①2001-2016年福建省海岸带低植被覆盖度面积总体下降,较低和较高植被覆盖度变化较为平缓,而高植被覆盖度呈现上升趋势;②2001-2016年生态承载力状态改善的面积增加了10.78%,基本稳定面积变化不大,而退化面积下降了7.05%,显著退化面积下降了3.48%。③2001-2016年不同类型主体功能区内植被覆盖波动下降,并呈现以生态承载能力改善为主要变化特征。[结论] 2001-2016年福建省海岸带植被覆盖度和生态承载能力呈现总体上升态势,海岸带整体生态环境不断改善。
关键词:  海岸带  植被覆盖度  像元二分模型  主体功能区
DOI:10.13961/j.cnki.stbctb.2020.01.034
分类号:TP79;X171.1
基金项目:国家自然科学基金面上项目"基于海岸带资源环境承载能力监测预警的岸线功能格局演变与调控机理研究"(41671126)
Characteristics of Vegetation Coverage in Coastal Zone of Fujian Province from 2001 to 2016
Qiao Wenhui, Wang Qiang
School of Geography Science, Fujian Normal University, Fuzhou, Fujian 350007, China
Abstract:
[Objective] The spatial pattern change of vegetation coverage in the coastal zone of Fujian Province was studied in order to provide a decision-making reference for resource environment monitoring and early warning based on the type of major functional zone.[Methods] Based on the NDVI index, the Landsat series remote sensing data of 2001, 2006, 2011, and 2016 were selected to evaluate the vegetation coverage of the study area to characterize the change in the ecological carrying capacity of that area.[Results] ① During 2001-2016, the area of low vegetation coverage was observed to decrease, and the variation in the lower and higher vegetation coverage was more moderate; whereas, the high vegetation coverage showed an upward trend. ② During 2001-2016, the area of the improved ecological carrying capacity increased by 10.78%, while the basic stable area underwent a minor change; further, the degraded area decreased by 7.05% and the significant degraded area decreased by 3.48%. ③ During 2001-2016, the vegetation coverage area of the major functional areas was observed to decrease, and the improvement in the ecological carrying capacity was the primary change.[Conclusion] The vegetation coverage and the ecological carrying capacity of the coastal zone in Fujian Province have generally increased, and the ecological environment of the coastal zone has been continuously improved from 2001 to 2016.
Key words:  coastal zone  vegetation coverage  pixel binary model  major functional area