地球科學(xué)概論earth-在線瀏覽
2024-11-10 15:11本頁(yè)面
【正文】 2022 2500A0 500 1000 1500 2022 2500B海豹數(shù)量 海冰面積 距今年齡 (年 ) 增多 1500年海豹數(shù)量與環(huán)境演變 海豹數(shù)量 海冰面積 增多 企鵝生態(tài)模型 A B a b c Seacoast Passage Passage α C B D E A A α α （ a） （ b） （ c） Dark black clay with many living mosses The lark clay and gravel debris with little moss relict Black sediments impacted by penguin droppings with little moss relict The moss humus Black anic mud with gravel debris from the nesting sites The mud impacted by penguin droppings with much moss relict Hardy sedimentary layer from penguin droppings with little moss relict The gravel debris from the nesting sites with the clay and much moss relict α AD3 G AD4 d b AD4 0cm10cm29cm23cm4cm2 4 6 8 10P2O5(%)250 350 450 550Sr(ppm)400 1200 2022F(ppm)05101520253050 100 150 200Zn(pppm)depth（cm）3 6 9Se(ppm)60 160 260Cu(ppm)0cm10cm19cmAD3 a 1 2 3 4 5P2O5(%)350 450 550Sr(ppm)300 1100 1900F(ppm)04812162080 120 160 200Zn(ppm)depth（cm）1 2 3 4Se(ppm)120 180 240Cu(ppm)0cm11cm54cm27cm35cm48cmc G 010203040500 2 4P2O5 （ % ）depth（cm）2 4 6 8CaO （ % ）0 200 400 600Sr （ ppm ）0 2022 4000F （ ppm ） Zn （ ppm ） Cu （ ppm ）Abandoned penguin rookery Active penguin rookery Ancient penguin active area Modern penguin active area Ancient tundra vegetation Modern tundra veget
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