From 6860 to 3170 cal.yr BP,semi-desert steppeexpanded,regional montane forest steppe retreated,suggesting a prolonged warm and dryclimate.Between 3170 and 2340 cal.yr BP,regional forest steppe expanded whereassemi-desert steppe retreated,indicating the climate became cool and wet gradually and thehumidity reached the maximum at the end of this stage.During 2340～1600 cal.yr BP,Poaceae steppe dominated whereas wetland meadow expanded and the montane forest stepperetreated,suggesting a cool and wet climate prevailed,wormwood grass steppe prevailed andthe climatic instability increased after 1600 cal.a BEThe climate and environmental reconstructions by pollen were supported by the diatomrecords.A relative high lake level and moister climate prevailed between 8660 and 7230 cal.yr BP as inferred by the dominance of planktonic diatom genera and high planktonic/benthicratio (〉40).low lake level and dry climate sustained during 7230～2330 cal.yr BP assuggested by the low abundance of planktonic diatom and low planktonic/benthic ratio ～20and the lake returned to high level during 2330～930 cal.yr BP as inferred by there-dominance of the planktonic diatom and the high value of palnktonic/benthic ratio.The pollen-based climate reconstruction was also consolidated by the grain size andPediastrum concentration records.

Ugii Nuur湖周圍現(xiàn)代孢粉研究表明：松屬為空氣傳播的外來花粉，其含量變化可能指示了遠(yuǎn)山森林草原發(fā)育狀況乱伦强奸欧美；禾本科具顯著低代表性在线看的a片，母體植物建群時(shí)含量通常在10％以下：藜科花粉含量可以指示區(qū)域氣候干旱程度。2玖玖玖免费网站、以現(xiàn)代孢粉研究為基礎(chǔ)亚洲区人人操、可靠AMS~(14)C年代為框架，Ugii Nuur孢粉記錄高分辨率地重建了蒙古國(guó)中部地區(qū)過去8660 cal.yr BP以來的植被和氣候變化短发熟女口爆国产一区。8660～7800 cal.yr BP研究區(qū)植被為禾草草原永久黄色网站免费观看av，湖畔及河谷低地發(fā)育苔草草甸又粗又黄又硬又爽的免费视频,，遠(yuǎn)山發(fā)育松屬針葉林和森林草原，氣候溫和略濕潤(rùn)精品视频一区二区在线导航；其中8350～8250 cal.yr BP濕生草甸擴(kuò)張，旱生植物成分減少麻豆AV免费看，氣候涼濕欧美性爱做。7800～6860 cal.yr BP旱生成分增加，氣候轉(zhuǎn)向暖干一级黄片视频免费看。6860～3170 cal.yrBP半荒漠草原擴(kuò)張亚洲黄色一级a片，遠(yuǎn)山森林草原退縮，山地草原和河谷及湖畔濕生草甸退縮中文自拍日韩在线视频网站，氣候持續(xù)暖干国产国产精品偷在线观看。3170～2340 cal.yr BP半荒漠草原退縮，遠(yuǎn)山森林草原擴(kuò)張成人野外激情免费观看视频网站下载，氣候轉(zhuǎn)涼變濕Aa一级片公司室，末期濕度條件達(dá)最佳。2340～1600 cal.yr BP禾草草原發(fā)育91地址国产一区，湖畔及河谷低地濕生草甸擴(kuò)張色欲天天影院视频，遠(yuǎn)山森林草原略有退縮，氣候總體較涼濕aaa级欧美黄片。1600 cal.yr BP以來研究區(qū)發(fā)育禾草-冷蒿草原性视频亚洲网站，氣候波動(dòng)較大。

Forest carrying capacity is an important and key index in evaluating forest sustainability and one gist of forest management and decision-making of a certain region.

它是森林可持續(xù)性評(píng)價(jià)中的一個(gè)重要的關(guān)鍵指標(biāo)日韩中美精品中文视频在线播放，是區(qū)域森林經(jīng)營(yíng)管理決策的依據(jù)之一久久黄色视频ji。

Based on the theories of sustainable development,index system of forest resources sustainable management and comprehensive evaluation of urban forest,the index system of measure the urban forest sustainable development have been put forward.

在可持續(xù)發(fā)展理論、森林資源可持續(xù)經(jīng)營(yíng)指標(biāo)體系研究及城市森林綜合評(píng)價(jià)指標(biāo)體系研究的基礎(chǔ)上激情第一第二综合天天，提出衡量城市森林可持續(xù)發(fā)展的指標(biāo)體系框架日韩欧美精品原创在线观看，設(shè)計(jì)城市森林可持續(xù)發(fā)展的綜合評(píng)價(jià)方法。

of spatial pattern analysisof forest landscaperevealed that,the value of each spatial pattern index of forest landscapewas strongly influenced by comparative economic benefit of landexploitation and forest management level.

通過森林景觀空間格局分析性欧美XXXX18HD视频，可以看出1000部国产怕怕怕精品，森林景觀類型的各項(xiàng)空間格局指標(biāo)受土地利用的經(jīng)濟(jì)比較效益和經(jīng)營(yíng)的集約度影響較大。

However, along with the use in a deep going way, most users find that the forest reserves map which is built by traditional vector data models in GIS is different from the real.:In traditional forest distribution map, we give tacit consent to the fact that the forest is represented by a polygon, whose boundary is taken as a abrupt change between different types and the interior of the polygon is regarded as uniform.

隨著應(yīng)用的深入日韩精品美女网页在线观看免费，很多用戶發(fā)現(xiàn)通過傳統(tǒng)GIS的矢量模型模式構(gòu)建的森林資源圖上所表示的信息與客觀世界中森林的分布是有差別的：基于傳統(tǒng)的GIS矢量模型下構(gòu)建的森林分布圖中五月天色色综合网，多邊形的邊界默認(rèn)為一種突變，同時(shí)森林內(nèi)部被認(rèn)為是均勻的干天天干。

Men who dwell outside the forest henceforth need not come before our justiciars of the forest following a general summons, unless they are named in a plea or are sureties for any person or persons arrested for forest offences.

男子誰(shuí)住以外的森林玩弄少妇视频在线播放，今后不必來到我們justiciars森林一般傳票后，除非它們被命名為一個(gè)認(rèn)罪或擔(dān)保人的任何一人或數(shù)人被捕啪啪啪精品，森林罪行7160无码视频在线观看。

The outputs of ZELIG model was used to 1evaluate the environmentalfactors which influence the growth of tree species of broad leaf korean pine forestin Changbai mountain;2simulate the dynamics of main types of forest in broad leafkorean pine forest zone and 3simulate the effect of selective cutting experiment onbroad leaf korean pine forest.

本文以森林Gap模型的理論為基礎(chǔ)日韩欧精品无码视频无删节，通過大量的外業(yè)調(diào)查，建立了長(zhǎng)白山闊葉紅松林的ZELIG模型人人干人人操人人，并根據(jù)ZELIG模型的模擬結(jié)果對(duì)長(zhǎng)白山闊葉紅松林帶的樹木生長(zhǎng)的環(huán)境因子進(jìn)行了評(píng)價(jià)字幕网国产在线观看，同時(shí)對(duì)闊葉紅松林帶內(nèi)的幾種主要的森林類型進(jìn)行了動(dòng)態(tài)模擬，最后運(yùn)用ZELIG模擬了闊葉紅松林的擇伐試驗(yàn)日屄网站免费看。

The Yilan Special Route No. 1 is one of the important tourist roads in the Taipin Mountain Forest Recreation Area, which is managed by the Luodong Forest District Office, Forest Bureau, Council of Agriculture, Executive Yuan. However, landslides due to typhoon and heavy rainfall occurred frequently along the road from milage stake 6km through 8km south of the Midway Explanation Station.

宜專一線公路系通往行政院農(nóng)業(yè)委員會(huì)林務(wù)局羅東林區(qū)管理處所轄管太平山森林游樂區(qū)重要之觀光道路性感美女被操免费视频，惟位於該公路里程6km至8km間，約在中間解說站南側(cè)路段色黄色视频在线免，每逢臺(tái)風(fēng)豪雨即造成道路邊坡明顯滑動(dòng)日韩精品免费乱码福利视频。

The whole city is covered with dense forest and with networks of rivers and lakes. As the provincial key timberland, the forest area reaches 450,000 ha., the forest coverage 70% and the alive timber storage 38 million steres.

全市森林茂密，有林地面積45萬(wàn)公頃超碰在线人妻露脸，森林覆蓋率近70%91精品国产自产在线观看48页，活立木蓄積量3800萬(wàn)立方米，是吉林省重點(diǎn)木材生產(chǎn)基地之一亚洲特黄av。

There were no significant differences between the pine forest and the oak forests in terms of leaf area index, canopy coverage, and light intensities above and beneath canopy. The canopy uniformity of the pine forest was significantly lower than that of the oak forest.

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