摘要
以金花茶国家级自然保护区及保护区外2 km邻近区为研究区,选取1986―2019年7期Landsat遥感影像进行土地利用遥感解译,并基于GIS与R语言空间统计方法分析近35年土地利用动态演变规律。结果表明:1)保护区土地利用以林地为主,邻近区林地和耕地面积占比最大。2)邻近区综合土地利用动态度变化比非核心区更剧烈;二者土地利用程度综合指数变化均呈现升高-降低-不变的波动趋势,表明保护区建立后人为干扰的下降有助于土地利用格局的稳定。3)土地利用类型转换频率为邻近区向非核心区递减,表明保护区的建设与管理可以有效保护当地的生态环境。4)保护区非核心区所有土地利用类型重心总体上向东北方向迁移;邻近区建设用地与耕地重心总体上都为向西方向迁移,表明已有建设用地扩张对保护区周围的土地利用空间动态变化有重要影响。5)保护区的管理取得较为显著的成效,保护区内部生态环境得到改善,但内部建设用地的缓慢增加与资源的不合理生产开发,仍然对保护区的生境质量产生负面影响。
The establishment of nature reserves is an important measure to protect rare wild animals and plants and their habitats.This plays a positive role in alleviating the ill effects of change in land use and protecting ecological diversity.Since the establishment of the first nature reserve in China,there has been notable development in the construction and infrastructure industry.Owing to this development,understanding whether nature reserves can effectively achieve the purpose of protection has gradually become a hot topic.An in-depth understanding of the evolution of land use types in nature reserves and their adjacent areas can evaluate the effectiveness of the construction of nature reserves,provide decision support for land resource planning,and help maintaining the balance of the ecosystem and sustainable development.Understanding the spatio-temporal evolution pattern of land use is important to create and preserve ecological security in protected areas.In this research,we studied the land use dynamics in Guangxi Golden Camellia national nature reserve and its adjacent two-kilometer buffer zone.Land use information was extracted from seven Landsat TM/OLI images from 1986,1994,1999,2004,2009,2014,and 2019.The spatio-temporal dynamics of land use over the past 35 years were studied using decision tree analysis and a transition matrix.The results showed that the land use in the reserve is mainly dominated by forestland,and the adjacent areas of the reserve is mainly dominated by forestland and arable land.Although the proportion of construction land is small,it has increased annually over the past 35 years.It was observed from the studies that the dynamic degree of construction land was always relatively high in the non-core region of the reserve and the adjacent areas,whereas the dynamic degrees of other land types fluctuated more gently,and the integrated land use dynamic degree of the adjacent areas was less.The core area changed more drastically,the change in the trend of the comprehensive land use dynamic degree in the adjacent areas and the non-core area was similar.After the establishment of the reserve,human disturbance was reduced in this region,and the land-use pattern became more stable.Furthermore,the conversion of land use types in the adjacent areas was frequent,of which the transfer and exchange between cultivated land and forest land was the most drastic,the conversion of land use in the non-core region was less.This shows that the establishment and management of the reserve effectively protects the local ecological environment.Additionally,the studies showed that the migration of the land use center of gravity had a certain direction.The center of gravity of all land use types in the non-core area of the reserve generally migrated to the northeast,and the center of gravity of construction land and cultivated land in the adjacent area of the reserve generally migrated to the west,indicating that the expansion of the original construction land had a strong influence on land use dynamics.The management of the reserve has achieved relatively remarkable effects and the ecological environment inside the reserve has been improved,but the slow increase of land for internal construction and resources exploitation still have a negative impact on the habitat quality of the reserve.This study provides data to support the dynamic monitoring of land use and further improvement of protection and restoration measures in subtropical natural reserves.
作者
黄秋霞
廖南燕
杨元征
俎佳星
王嘉丽
蔡文华
杨健
苏宏新
杨婷
Huang Qiuxia;Liao Nanyan;Yang Yuanzheng;Zu Jiaxing;Wang Jiali;Cai Wenhua;Yang Jian;Su Hongxin;Yang Ting(School of Geography Science and Planning,Nanning Normal University,Nanning 530001,China;Guangxi Zhuangzu Autonomous Region Fangcheng Golden Camellia National Nature Reserve Management Office,Fangchenggang 538021,China;Key Laboratory of Environment Change and Resources Use in Beibu Gulf,Ministry of Education,Nanning 530001,China;Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation,Nanning 530001,China)
出处
《热带地理》
CSCD
北大核心
2022年第6期973-984,共12页
Tropical Geography
基金
广西科技基地和人才专项(桂科AD19110143)
广西自然科学基金(2018GXNSFAA294040、2018GXNSFBA294008)。
