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基于GIS與RS的北方防沙屏障帶生態(tài)系統(tǒng)格局演變
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國(guó)家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2018YFC0507303-2)


Spatial and Temporal Variations of Ecosystem Patterns in Northern Sand Control Barrier Belt Based on GIS and RS
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    摘要:

    研究北方防沙屏障帶生態(tài)系統(tǒng)格局演變特征,,對(duì)加強(qiáng)屏障帶建設(shè)、改善生態(tài)環(huán)境具有重要意義,。以北方防沙屏障帶為研究區(qū),,根據(jù)2005、2010,、2015年MODIS遙感影像,,將北方防沙屏障帶生態(tài)系統(tǒng)類型劃分為森林、草地,、濕地,、農(nóng)田、城鎮(zhèn),、荒漠和裸地7類,。采用空間統(tǒng)計(jì)、轉(zhuǎn)移矩陣,、景觀指數(shù)分析法,、PNTIL模型等方法,對(duì)北方防沙屏障帶2005—2015年生態(tài)系統(tǒng)類型時(shí)空演變特征進(jìn)行分析,。結(jié)果表明,,2005—2015年北方防沙屏障帶生態(tài)系統(tǒng)整體呈穩(wěn)定狀態(tài);從分屏障帶看,,內(nèi)蒙古防沙屏障帶荒漠面積明顯減少,,塔里木防沙屏障帶森林面積迅速增加,而河西走廊防沙屏障帶草地面積明顯增加,;從正/逆轉(zhuǎn)換方向來(lái)看,,屏障帶內(nèi)農(nóng)田、城鎮(zhèn),、荒漠及裸地生態(tài)系統(tǒng)正向轉(zhuǎn)換率高于逆向轉(zhuǎn)換率,。10年間,,在景觀水平上,北方防沙屏障帶斑塊數(shù)量,、斑塊密度呈減少趨勢(shì),;在類型水平上荒漠景觀整體呈現(xiàn)破碎化萎縮的趨勢(shì)特征,,森林、草地向形狀簡(jiǎn)單化的方向發(fā)展,。研究表明,2005—2015年,,北方防沙屏障帶生態(tài)總體向好,,治沙效果明顯,但局部仍面臨較大壓力,。

    Abstract:

    As a key part of the “two screens and three belts”, the northern sand control barrier belt is of great significance for strengthening construction of the barrier belt and improving the ecological environment. Based on the MODIS remote sensing images of 2005,,2010 and 2015,the landscape types of the northern sand control barrier belt were divided into seven categories: forest,,grassland,,wetland,farmland,,artificial surface, desert and bare area. Spatial statistics, transfer matrix, landscape index analysis and PNTIL model were used to analyze the temporal and spatial evolution characteristics of ecosystem types in the northern sand barrier belt from 2005 to 2015. The results showed that from 2005 to 2015, the whole ecosystem of the north sand barrier belt was stable. In terms of different regions, the desert area was decreased significantly in Inner Mongolia, and the forest area in the Tarim Desert Protection Barrier was increased rapidly, while the grassland area was increased significantly in the Hexi Corridor. From the perspective of forward/reverse transformation, the positive conversion rate of farmland, town, desert and bare land ecosystems in the barrier zone was higher than the reverse conversion rate. During the past ten years, at the landscape level, the number of patches and patch density in the northern sand barriers showed a decreasing trend. At the type level, the desert landscape as a whole showed a trend of fragmentation and shrinkage. Forests and grasslands developed in the direction of simplified shapes. The results indicated that from 2005 to 2015, the ecological environment of the northern barrier zone was generally good, and the effect of sand control was obvious, but the local area was still facing great pressure.

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蘇凱,孫小婷,王茵然,陳龍,岳德鵬.基于GIS與RS的北方防沙屏障帶生態(tài)系統(tǒng)格局演變[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2020,51(9):226-236. SU Kai, SUN Xiaoting, WANG Yinran, CHEN Long, YUE Depeng. Spatial and Temporal Variations of Ecosystem Patterns in Northern Sand Control Barrier Belt Based on GIS and RS[J]. Transactions of the Chinese Society for Agricultural Machinery,2020,51(9):226-236.

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  • 收稿日期:2020-06-28
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  • 在線發(fā)布日期: 2020-09-10
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