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基于GIS的縣域森林景觀空間格局等級特征研究
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中央級公益性科研院所基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金項(xiàng)目(CAFYBB2017ZA007-3、CAFYBB2017MB038)和林業(yè)軟科學(xué)研究項(xiàng)目(2018-R5)


Spatial Characteristics of Forest Landscape in County Level Based on GIS
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    摘要:

    縣域作為協(xié)調(diào)人類活動與自然資源關(guān)系的基本單元,,是造林綠化和森林景觀資源經(jīng)營的重要空間,。以河北省易縣為例,,以森林資源二類清查資料和土地利用資料為基礎(chǔ),,基于GIS技術(shù),,通過景觀等級類型劃分,、景觀指數(shù)篩選和主成分分析法,,對縣域尺度森林景觀空間格局及其等級特征進(jìn)行了多層次研究。結(jié)果表明:林地景觀占全域面積的58.4%,,楊樹,、油松、柞樹,、山杏等林種和經(jīng)濟(jì)林是優(yōu)勢森林景觀,;景觀分離度(SPLIT),、多樣性指數(shù)(SHDI)和斑塊密度(PD)等對組織層次變化響應(yīng)強(qiáng)烈,隨著組織層級細(xì)化,,景觀破碎化程度增大,,斑塊面積、數(shù)量等特征逐漸增強(qiáng),;在景觀和類型水平,,組織層級越高,森林景觀蔓延和聚合趨勢越明顯,,組織層次越細(xì),,各森林景觀類型空間集聚、叢生化程度越明顯,,景觀斑塊邊緣效應(yīng)越突出,。研究區(qū)森林景觀與地形、土地利用類型等因素相互耦合,,從山區(qū)到平原區(qū),,隨著人類活動影響增強(qiáng),森林景觀破碎化,、斑塊形狀復(fù)雜性及空間差異增大,,因此森林景觀資源健康管理應(yīng)注重對景觀多樣性、空間分割程度,、核心斑塊面積和數(shù)量等關(guān)鍵指標(biāo)的控制,。

    Abstract:

    As a basic unit to coordinate the relationship between human activities and natural resources, county is an important area to carry out afforestation project and forest landscape resources management. The case study site was Yixian County of Hebei Province, which is well known for its landscape diversity, more forestation and high forest coverage. With the support of geographic information system (GIS) and principal component analysis (PCA), and based on the date of forest resources inventory and land use, the forest landscape patterns and its hierarchical characteristics were studied at county scale. The results showed that woodland landscape accounted for more than 58% of the total area, poplar, Pinus tabulaeformis, oak trees, apricot and other economic forest were the dominant forest landscape;splitting index (SPLIT), Shannon’s diversity index (SHDI) and patch density (PD) exhibited a strong response to the changes in three levels of organizational hierarchy. With the refinement of the organization level, the degree of landscape fragmentation was increased, the area and quantity of the patch were increased gradually. The higher the organization level in the landscape level and patch type level was, the more obvious the trend of forest landscape contagion and cohesion was, in contrast, the more fine the organization level was, the more obvious the forest landscape aggregation and clumpiness was, and the more prominent the edge effect of the landscape patch was. Moreover, it proved that many factors affected forest landscape patterns and coupled with each other, such as terrain, land use type and living environment. From mountain to plain area, with the enhancement of the human activities and forest landscape, the forest landscape fragmentation, complexity of patch shape and its spatial difference were increased gradually. Therefore, the health management of forest landscape resources should be focused on the key indicators such as landscape diversity, spatial segmentation, core patch area and number, and so on

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孟超,王計(jì)平,支曉蓉,胡艷萍,張德成,王蕾.基于GIS的縣域森林景觀空間格局等級特征研究[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2018,49(10):187-194,204. MENG Chao, WANG Jiping, ZHI Xiaorong, HU Yanping, ZHANG Decheng, WANG Lei. Spatial Characteristics of Forest Landscape in County Level Based on GIS[J]. Transactions of the Chinese Society for Agricultural Machinery,2018,49(10):187-194,,204.

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  • 收稿日期:2018-07-12
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  • 在線發(fā)布日期: 2018-10-10
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