亚洲一区欧美在线,日韩欧美视频免费观看,色戒的三场床戏分别是在几段,欧美日韩国产在线人成

鄉(xiāng)鎮(zhèn)尺度森林景觀格局特征與影響因素定量分析
作者:
作者單位:

作者簡介:

通訊作者:

中圖分類號:

基金項目:

中央級公益性科研院所基本科研業(yè)務費專項資金項目(CAFYBB2017MB038、CAFYBB2017ZA007-3)和林業(yè)軟科學研究項目(2018-R5)


Quantitative Analysis of Forest Landscape Pattern and Its Influencing Factors in Township Scale
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 圖/表
  • |
  • 訪問統(tǒng)計
  • |
  • 參考文獻
  • |
  • 相似文獻
  • |
  • 引證文獻
  • |
  • 資源附件
  • |
  • 文章評論
    摘要:

    為更客觀、精細地刻畫森林生態(tài)系統(tǒng)格局的完整性、穩(wěn)定性和森林資源健康狀況,為森林資源源頭保護和合理經(jīng)營管理提供科學依據(jù)和決策支持,以河北省易縣森林資源清查數(shù)據(jù)、DEM數(shù)據(jù)和社會經(jīng)濟資料為基礎,運用景觀指數(shù)、結構方程模型和統(tǒng)計學方法,分析鄉(xiāng)鎮(zhèn)尺度森林景觀類型、數(shù)量與分布,研究自然地理、社會經(jīng)濟和土地開發(fā)利用主導下森林景觀格局特征差異及其影響機制。結果表明,西部山區(qū)鄉(xiāng)鎮(zhèn)森林景觀資源優(yōu)勢明顯,東部平原鄉(xiāng)鎮(zhèn)森林資源則較小,森林資源主要分布于海拔100~300m淺山丘陵區(qū)和海拔500~800m中山區(qū)。在景觀和類型水平上,斑塊密度(PD)、凝結度(COHESION)對地理環(huán)境支配和人類活動干擾的響應更大,低破碎化、高連通性、多樣化森林景觀與高海拔、高起伏度的地形條件關系密切,鄉(xiāng)鎮(zhèn)耕地和居民建設用地面積占比(PCLA、PRCLA)越大,林地景觀破碎化越強和連通性程度越低。平均坡度(MS)、土層厚度(SD)和高差(ED)作為基礎性的控制因素,直接影響耕地、居民建設用地占比等方面,間接作用于森林景觀格局。在一定的地形土壤條件下,降低人口數(shù)量、耕地數(shù)量和居民建設用地占比,可降低森林景觀格局破碎化,提升森林景觀連通性。

    Abstract:

    To describe the integrity, stability and health of forest ecosystem more objectively and meticulously, and provide scientific basis and decision support for the protection of forest resources at the source and the rational management and management of forest resources, based on the forest resources inventory data, DEM data and social and economic data in Yi County, Hebei Province, the forest landscape types, quantity and distribution of township scale were analyzed by using landscape index, structural equation model and statistical method. The characteristics of forest landscape pattern and its influence mechanism were studied under the dominance of natural geography, social economy and land exploitation and utilization. The following results were obtained: the forest landscape resources of the western mountainous areas were obvious, while the eastern plain villages and towns were smaller. The forest resources were mainly distributed in 100~300m hilly areas and in the middle mountains of 500~800m. At the landscape and type level, the forest resources of the villages and towns in the eastern plain were relatively small. Patches density (PD) and cohesion (COHESION) were more responsive to geographical environment dominance and human activity interference. There was a close relationship between low fragmentation, high connectivity, diverse forest landscape and high elevation, high undulating terrain conditions. The larger the area ratio of proportion of cultivated land area and proportion of resident construction land area (PCLA, PRCLA) was, the lower the degree of fragmentation and connectivity of forest landscape was. Mean slope (MS), soil depth (SD) and elevation difference (ED) as the basic control factors directly influenced the cultivated land and the inhabitant construction land proportion and so on, and it had an indirect action on the forest landscape pattern. Under certain topographic and soil conditions, reducing average population size (APS), the proportion of PCLA and PRCLA can reduce the fragmentation of forest landscape pattern and enhance the connectivity of forest landscape.

    參考文獻
    相似文獻
    引證文獻
引用本文

孟超,王計平,支曉蓉,谷建才,張德成.鄉(xiāng)鎮(zhèn)尺度森林景觀格局特征與影響因素定量分析[J].農(nóng)業(yè)機械學報,2019,50(3):212-220. MENG Chao, WANG Jiping, ZHI Xiaorong, GU Jiancai, ZHANG Decheng. Quantitative Analysis of Forest Landscape Pattern and Its Influencing Factors in Township Scale[J]. Transactions of the Chinese Society for Agricultural Machinery,2019,50(3):212-220.

復制
分享
文章指標
  • 點擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2019-01-02
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期: 2019-03-10
  • 出版日期: 2019-03-10
文章二維碼