简介：10月16日,省厅驻农垦绥化国土资源分局举办“一张图”测绘移动终端系统应用培训班。局长杨胜文在开班式上强调,信息化在国土资源管理工作中起到越来越重要的做用,从过去纸质报卷到今天的网上直接审批;从多张图逐宗对照到现在的“一张图”管地;从过去的依靠钢尺测量到现在全占仪测绘,信息化为科学用地、合理管地提供了极大的便利条件。

简介：TheGurbantunggutDesertisthelargeststableandsemi-stablesanddesertinChina,yetfewdataexistonvegetationpatternandspecies-environmentrelationshipsforthesediversedesertlandscapes.Thesanddunesofthesurveyareaaremainlyofthelongitudinalformfromnorthtosouth,butcheckerboard-shapedandhoneycomb-shapedformsarealsopresent,withtheheightof10-50m.Wemeasuredvegetationandsoildataonnorth-southtransectsandcomparedthemwithvegetationandsoildataoneast-westtransects.Analysisrevealedthatthevaryingtrendandstrengthofthespeciesdiversity,dominanceandcoveroftheplantcommunitiesinthelongitudinalandtransversedirectionsacrossthelandscapearesignificantlydifferent.TheresultsofCCAordinationshowthatthemicro-habitatsofsoilorganicmatter(OM),soilsalts(TS),sortingindex(σ),topsoilwater-content(SM)andpHrelatetothedifferencesinvegetationobservedasdifferencesinspeciesassemblagefromsalt-intolerantephemerals,micro-subshrubsandsubshrubstosalt-tolerantshrubsandmicro-arbors.Theterrain(alt.)andsoiltexture(thecontentsofMzandφ1)affectthespatialdifferentiationofmanyspecies.However,thisspatialdifferentiationisnotsomarkedontransectsrunninglongitudinallywiththelandscape,inthesamedirectionasthedunes.Thespeciesofthedesertvegetationhaveformedthreeassemblagesundertheactionofhabitatgradients,relatingtothreesectionsrunningtransverselyacrossthelandscape,atrightanglestothedirectionofthedunecrests.Inthemid-eastsectionofthestudyareathetopographyishigher,withsand-landsordune-slopeswithcoarseparticles.HerethedominantvegetationcomprisesshrubsandsubshrubsofSeriphidiumsantoliumandEphedradistachya,withlargenumbersofephemeralandephemeroidplantsofSeneciosubdentatus,andCarexphysodesinspringandsummer.Onthesoilofthedune-slopesinthemidwestofthestudyarea,withcoarseparticlesandabundantTK,theplantassemblageofHaloxylonpersicu