A relative low lake level between 8660～6010 cal.yr BPwas reflected by the clayey silt sediment with the median size less than 25μam and the sandcontent less than 4%,and the Pediastrum concentration was normally low.Between 6010 and2250 cal.yr BP,the median size and sand content increased greatly,and the Pediastrumconcentration raised sharply,suggesting a relative low lake level.After 2250 cal.yr BP,boththe median size and the Pediastrum abundance abruptly declined,suggesting the lake returnedto high level and the climate changed to humid.

UG04孔硅藻記錄重建的湖泊水位變化基本上支持孢粉重建的古植被和古氣候：8660～7230 cal.yr BP硅藻組合以浮游類主導(dǎo)88黄色网站，浮游／底棲比達(dá)40以上色狼www.，指示水位較高菊花奴隶人妻品评会，氣候略濕潤玖玖爱在线精品视频6；7230～2330 cal.yr BP浮游類硅藻豐度和浮游／底棲比降低有看a片的网址吗，湖泊處于低水位AV最新免费不卡在线观看，氣候干旱国产丁香免费观看AV；2330～930 cal.yr BP浮游類硅藻豐度和浮游／底棲比增加，湖泊水位升高www99久久com，氣候濕潤久久精品一级无码。

With 5 plants including Lindernia rotundifolia, Cryptocoryne crispatula, Hygrophila stricta, Microrium sp. and Peperomia sandersii as the tested materials and the highest eutrophic lake water from Guishui Lake in Yanqing County in Beijing City as the matrix of plant growth, 3 test groups with high, middle and low input density were set up to study the effect of input density of aquatic plants on the purifying efficiency of the eutrophic lake water.

方法］以小瓜子、緞帶椒亚洲欧美女同一区二区、中柳www.jsytsm.com、皇冠和西瓜草5種植物為試材，以北京市延慶縣媯水湖8月份富營養(yǎng)化程度最高的湖水為植物生長基質(zhì)欧美性爱三级片在线播放，設(shè)高国产91酒店约熟女、中、低3個投放密度試驗(yàn)組最新理论片2021理论，研究植物投放密度對富營養(yǎng)化湖水的修復(fù)效率影響欧美一级特黄aaaaaa片在线视频；通過測定水樣中總磷酸鹽、總氮日本成年A片免费网站、氨氮和硝態(tài)氮的濃度變化Se九一片在喷色p，確定植物修復(fù)的最佳效率。

Here, we took demonstration study of the ecological impacts of disconnection from the river on fish recources in Zhangdu Lake. Our results showed that:(1) Fishery mode changed and the rate of wild fishery production changed from 95% in 1949 to less than 5% in 2002.(2) Fish species have decreased from 80 in 1950s to 52 at present, and the rate of migrant and potamic species decreased from 50% in 1950s to 30% at present.(3) Comparing with the linking lake, Zhangdu Lake had higher fishing production, larger individual size, fewer species number and lower diversity index of "mihunzheng" fishery, a universal fishing tool in Yangtze.

我們以漲渡湖為例開展江湖阻隔后對單個湖泊魚類資源所產(chǎn)生的生態(tài)影響進(jìn)行研究99re免费99re在线视频，結(jié)果表明：江湖阻隔導(dǎo)致湖泊生產(chǎn)經(jīng)營方式改變A片网站一区，使得野生漁業(yè)產(chǎn)量的比例由1949年的95%，降低到2002年的不足5%亚洲最大欧美日韩视频；江湖阻隔后湖泊魚類種類由50年代約80種下降到現(xiàn)在的52種三级爆乳黄片在线看，其中，洄游性和流水型魚類比重由50%下降至不足30%中文字幕制服丝袜第57页；迷魂陣漁獲物在單位產(chǎn)量爱爱视频a、個體大小上極顯著(p 0.01)地高于通江湖泊，但在物種數(shù)和多樣性指數(shù)上則要低得多(p 0.01)人妻天堂久久。

The coast forest onion onion, in green grass cushion cushion, the lake the blue water is clear, near the lake alley, the pebbles shoal, the stair slope protection, the countless changes, causes the lake shore smoothly to stand erect from time to time, the edges and corners are distinct, from time to time the mountain riddlings fold, completely relaxed.

沿岸林木蔥蔥色偷偷66、綠草茵茵、湖中碧水粼粼综合亚洲色五月，臨湖小路97国产在线视频一，卵石淺灘，臺階護(hù)坡性欧美国产片，變化無窮亚洲最大无码在线，使湖岸時而平滑直立，棱角分明在线亚洲精品，時而山石層疊九九视频精品，令人心曠神怡。

Qaidam basin ; Tertiary ; shore\|lake and shallow\|lake subfacies ; lake delta facies

柴達(dá)木盆地；第三系欧美日在线观看黄片；濱—淺湖灘壩亞相可以直接进入毛片的网站；湖泊三角洲相

A comprehensive study on petrology, structures, facies models, facies associations and sedimentary systems in this paper shows that the main facies in Tertiary are shore-lake and shallow-lake subfacies, and lake delta facies from low-Gancaigou formation to low-Youshashan formation.

對該地區(qū)的地面、井下巖性和巖相進(jìn)一步研究表明日本亚洲网站，自下干柴溝組至下油砂山組的儲集砂體主要為濱一淺湖灘壩亞相和湖泊白三角洲相国产精品拍在线天天更新。

Lake Taupo陶波湖:Lake Taupo is the largest lake in New Zealand and was formed by an enormous volcanic eruption 26000 years ago.

陶波湖是新西蘭的最大湖，大約2萬多年前由火山爆發(fā)而成欧美在线网址。

In the middle or down districts of large rivers, such as Zhujiang Tripple, Jingjiang—Dongting lake, Tai lake and Boyang lake, ri...

在我國一些大江大河的中国产精品黄色视频哪里有、下游地區(qū)，如珠江三角洲久久久久毛片一级录像、荊江—洞庭湖區(qū)日韩可以在线观看的黄色网站、太湖以及鄱陽湖流域等，眾多河流與湖泊交織在一起黄色网站视频观看，形成復(fù)雜的河網(wǎng)无码国产网。

Once known as Lake Rudolf, Lake Turkana is the northernmost lake in the Great Rift Valley, a highly volcanic region that runs 3,700 miles (6,000 kilometers) from Mozambique to Syria.

亦被稱為Rudolf湖的Turkana湖地處東非大裂谷（一個富火山區(qū)域，長達(dá)3700英里日日摸日日操，即6千公里拍拍黄色级影视尤物视频，從莫桑比克至敘利亞）的極北端。

Once known as Lake Rudolf, Lake Turkana is the northernmost lake in the Great Rift Valley, a highly volcanic region that runs 3,700 miles (6,000 kilometers) from Mozambique to Syria.

Navbiotum休眠火山位于南部海岸的圖爾卡納湖在肯尼亞免费看黄色短片。