| 白河自然保护区生态景观格局变化初步分析 |
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| 引用本文： | 李瑜,胡翔,董鑫.白河自然保护区生态景观格局变化初步分析[J].四川林业科技,2020,41(1):11-18. |
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| 作者姓名： | 李瑜 胡翔 董鑫 |
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| 作者单位： | 西华师范大学环境科学与工程学院,四川南充 637000;西华师范大学环境科学与工程学院,四川南充 637000;西南野生动植物资源保护教育部重点实验室,四川南充 637000 |
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| 基金项目： | 国家林业和草原局项目（401295） |
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| 摘 要： | 四川省白河自然保护区是目前所知的四川岷山山系川金丝猴种群最大、密度最高、最具有代表性的保护区,对该地区在地震前后的生态景观格局变化进行分析有利于物种资源的保护。本研究基于地理信息系统和遥感数据处理软件平台,结合2008年汶川地震与2017年九寨沟地震发生的关键时间节点,从2003—2018年每隔5年,选取了Landsat5 TM和Landsat8 OLI的遥感影像,利用生态景观格局类型及景观生态指数来分析两次地震前后15年间白河自然保护区在景观水平和斑块类型水平尺度上的生态景观格局的变化情况。结果表明,白河自然保护区景观类型由裸岩、草地/灌木、温带针叶林、针阔混交林、落叶阔叶林5种类型组成。在Fragstats4.2中选取8个景观指数,分别从斑块类型水平和景观水平对保护区生态景观格局变化进行初步分析发现,斑块类型水平上,2003—2018年白河自然保护区的主要景观类型为针阔混交林,其次为温带针叶林和落叶阔叶林,且两次地震均导致主要景观类型所占面积下降,各景观类型斑块数量增多,景观类型平均面积减小,景观的破碎化程度增加;景观水平上,两次地震导致景观多样性降低,景观整体形状趋于复杂,景观空间异质性程度下降,各景观类型面积所占比例的差距增大,整体景观朝着非均衡化方向发展。本研究结果对地震前后的生态环境变化监测,灾后生态恢复重建,以及物种资源尤其是川金丝猴的栖息地保护提供科学的参考依据。
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| 关 键 词： | 生态景观格局变化 白河自然保护区 3S技术 地震 |
Preliminary Analysis on Ecological Landscape Pattern Changes in Baihe Nature Reserve |
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| LI Yu,HU Xiang,DONG Xin.Preliminary Analysis on Ecological Landscape Pattern Changes in Baihe Nature Reserve[J].Journal of Sichuan Forestry Science and Technology,2020,41(1):11-18. |
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| Authors: | LI Yu HU Xiang DONG Xin |
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| Institution: | (College of Environmental Science and Engineering,China West Normal University,Nanchong 637000,China;Key Laboratory of Southwest China Wildlife Resource Conservation(Ministry of Education),China West Normal University,Nanchong 637009,China) |
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| Abstract: | Baihe Nature Reserve is currently the largest,densest and most representative protected area of Sichuan golden snub-nose monkeys(Rhinopithecus roxellanae)in the Minshan Mountain Systems of Sichuan Province.Analysis of the ecological landscape pattern changes before and after the earthquake is beneficial to the protection of species resources.Based on the geographic information system and remote sensing data processing software platform,this study combined the key time nodes of the Wenchuan Earthquake in 2008 and the Jiuzhaigou Earthquake in 2017.From 2003 to 2018,every five years the remote sensing images of Landsat5 TM and Landsat8 OLI were selected.The ecological landscape pattern and landscape ecological index were used to analyze the ecological landscape pattern changes of the Baihe Nature Reserve on the horizontal level and the patch type horizontal scale during the 15 years before and after the two earthquakes.The results showed that Baihe Nature Reserve consisted of five landscape types:bare rock,grassland/shrub,temperate coniferous forest,mixed coniferous and broad-leaved forest and deciduous broadleaved forest.Eight landscape indices were selected in Fragstats 4.2 to analyze the ecological landscape pattern of the protected areas from the plaque type level and landscape level.The preliminary analysis revealed that,at the plaque type level the main landscape types of Baihe Nature Reserve in 2003?2018 were mixed coniferous and broad-leaved forests,followed by temperate coniferous forests and deciduous broad-leaved forests.Both earthquakes resulted in a decrease in the area of major landscape types,an increase in the number of patches in each landscape type,a decrease in the average area of landscape types,and an increase in the fragmentation of the landscape.At the landscape level,both earthquakes led to a decrease in landscape diversity,a trend towards more complex landscape overall shape,a decrease in landscape spatial heterogeneity,an increase in the gap of each landscape type area proportion,and an imbalance in overall landscape development.Moreover,the present study provides scientific references for monitoring the ecological environment changes before and after earthquakes,ecological restoration and reconstruction after disasters,and habitat conservation of species resources,especially Sichuan golden snub-nose monkeys. |
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| Keywords: | Ecological landscape pattern changes Baihe Nature Reserve 3S technology Earthquake |
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