ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

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

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

基金項(xiàng)目:

中央級(jí)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(CAFYBB2017MB038、CAFYBB2017ZA007-3)和林業(yè)軟科學(xué)研究項(xiàng)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(wèn)統(tǒng)計(jì)
  • |
  • 參考文獻(xiàn)
  • |
  • 相似文獻(xiàn)
  • |
  • 引證文獻(xiàn)
  • |
  • 資源附件
  • |
  • 文章評(píng)論
    摘要:

    為更客觀,、精細(xì)地刻畫(huà)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(hù)和合理經(jīng)營(yíng)管理提供科學(xué)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(huì)經(jīng)濟(jì)資料為基礎(chǔ),運(yùn)用景觀指數(shù),、結(jié)構(gòu)方程模型和統(tǒng)計(jì)學(xué)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(huì)經(jīng)濟(jì)和土地開(kāi)發(fā)利用主導(dǎo)下森林景觀格局特征差異及其影響機(jī)制。結(jié)果表明,,西部山區(qū)鄉(xiāng)鎮(zhèn)森林景觀資源優(yōu)勢(shì)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(jié)度(COHESION)對(duì)地理環(huán)境支配和人類活動(dòng)干擾的響應(yīng)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(guān)系密切,,鄉(xiāng)鎮(zhèn)耕地和居民建設(shè)用地面積占比(PCLA、PRCLA)越大,,林地景觀破碎化越強(qiáng)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(chǔ)性的控制因素,,直接影響耕地,、居民建設(shè)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?cái)?shù)量和居民建設(shè)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(xiàn)
    相似文獻(xiàn)
    引證文獻(xiàn)
引用本文

孟超,王計(jì)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(jī)械學(xué)報(bào),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(fù)制
分享
文章指標(biāo)
  • 點(diǎn)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