几十年前物种消失的速度 生物灭绝速度什么时候最快?
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\u8d44\u6599\u4e09\uff1ahttp://www.people.com.cn/GB/paper39/1519/246382.html
\u8d44\u6599\u56db\uff1ahttp://www.uua.cn/news/show-9762-1.html
绛旓細绗竴娆.鍦ㄨ窛浠4.4浜垮勾鍓嶇殑濂ラ櫠绾湯鏈.鏄湴鐞冨彶涓婄涓夊ぇ鐨勭墿绉嶇伃缁濅簨浠.绾85%鐨勭墿绉嶇伃浜.鍙ょ敓鐗╁瀹惰涓鸿繖娆$墿绉嶇伃缁濇槸鐢卞叏鐞冩皵鍊欏彉鍐烽犳垚鐨.鍦ㄥぇ绾4.4浜垮勾鍓.鐜板湪鐨勬拻鍝堟媺鎵鍦ㄧ殑闄嗗湴鏇剧粡浣嶄簬鍗楁瀬.褰撻檰鍦版眹闆嗗湪鏋佺偣闄勮繎鏃.瀹规槗閫犳垚鍘氬帤鐨勭Н鍐---濂ラ櫠绾鏄繖绉嶆儏褰.澶х墖鐨勫啺宸濅娇娲嬫祦鍜屽ぇ姘旂幆娴佸彉鍐.鏁翠釜鍦扮悆鐨勬俯搴...
绛旓細璺濅粖2.5浜垮勾鍓嶇殑浜屽彔绾湯鏈燂紝鍙戠敓浜嗘湁鍙蹭互鏉ユ渶涓ラ噸鐨勫ぇ鐏粷浜嬩欢锛浼拌鍦扮悆涓婃湁96%鐨勭墿绉嶇伃缁濓紝鍏朵腑90%鐨勬捣娲嬬敓鐗╁拰70%鐨勯檰鍦拌剨妞庡姩鐗╃伃缁銆備笁鍙惰櫕銆佹捣铦庝互鍙婇噸瑕佺強鐟氱被缇ゅ叏閮ㄦ秷澶便傞檰鏍栫殑鍗曞紦绫荤兢鍔ㄧ墿鍜岃澶氱埇琛岀被缇や篃鐏粷浜嗐4銆佺鍥涙鏃堕棿锛2浜垮勾鍓嶇殑涓夊彔绾櫄鏈熴傜鍥涙鐢熺墿澶х伃缁濆張绉颁笁鍙犵邯澶х伃缁濄
绛旓細璺濅粖2浜垮勾鍓嶏紝涓夊彔绾椂鏈熶篃鍙戠敓浜嗕竴娆$敓鐗╁ぇ鐏粷锛杩欎竴娆″叡鏈76%鐨勭墿绉嶆秷澶辨畣灏銆傝繖涓娆$殑鍦扮悆闇镐富涓衡滅埇琛屽姩鐗┾濄傚拰鍓嶅嚑娆$浉姣旓紝杩欎竴娆$敓鐗╁ぇ鐏粷骞舵病鏈夌壒鍒槑鏄剧殑鏍囧織锛屼絾鐏粷鐨勫師鍥犱技涔庝笌缂烘哀鏈夊叧锛屽叿浣撹繕闇瑕佺瓑寰呯瀛﹀鐮旂┒鎵嶅彲浠ヨВ绛斻傜浜旀澶х伃缁 鐧藉灘绾湯鏈熸亹榫欏ぇ鐏粷銆傝繖涓娆$敓鐗╁ぇ鐏粷鎴戜滑姣旇緝...
绛旓細濂ラ櫠绾-蹇楃暀绾伃缁濅簨浠讹細鍙戠敓鍦ㄥゥ闄剁邯鏅氭湡鎴栧ゥ闄剁邯涓庡織鐣欑邯杩囨浮鏃舵湡锛4.50浜垮勾鍓嶈嚦4.40浜垮勾鍓嶏紝绾27%鐨勭涓57%鐨勫睘鐏銆備粠鐏鐨勭敓鐗╁垎绫荤殑灞炵殑鏁伴噺锛岃璇勪负浜旀澶х伃缁濅簨浠剁殑绗笁浣嶃傜洿鎺ュ師鍥犳槸鍐堢摝绾冲ぇ闄嗚繘鍏ュ崡鏋佸湴鍖猴紝褰卞搷鍏ㄧ悆鐜祦鍙樺寲锛屽鑷村叏鐞冨喎鍖栬繘鍏ュ畨绗柉-鎾掑搱鎷夊啺娌虫椂鏈燂紝娴烽潰澶у箙搴︿笅闄嶃傛偿鐩嗙邯...
绛旓細绗洓娆$敓鐗╁ぇ鐏粷锛氱鍥涙鐢熺墿澶х伃缁濅簨浠跺彂鐢熷湪2浜垮勾鍓嶅乏鍙筹紝杩欐鐏粷浜嬩欢閫犳垚浜50%宸﹀彸鐨勭墿绉嶆秷澶锛岃繖娆″彂鐢熷湪涓夊彔绾笌渚忕綏绾箣闂寸殑鐏粷浜嬩欢锛屾鏄繖娆′簨浠朵娇寰楁亹榫欎粠姝ゅ礇璧凤紝鎴愪负浜嗗湴鐞冧笂鐨勯湼涓汇傜浜旀鐢熺墿澶х伃缁濓細绗簲娆$敓鐗╁ぇ鐏粷鎭愭曟槸鎵鏈変汉鏈鐔熸倝鐨勪竴娆$敓鐗╁ぇ鐏粷浜嬩欢锛屼簨浠跺彂鐢熷湪6500涓囧勾鍓嶏紝杩欐...
绛旓細300澶氱銆備粠17涓栫邯鍒20涓栫邯鏈殑300骞撮噷锛屽彲浠ヨ鏄笘鐣屼粠杩戜唬閫愭璧板悜鐜颁唬鐨勬椂鏈燂紝鍦ㄨ繖300骞撮噷锛屼汉绫绘枃鏄庨閫熷彂灞曪紝鏃朵唬鍦ㄨ繘姝ワ紝鍦扮悆姝e湪涓鐐圭偣鍦颁负鎴戜滑鎵鏀瑰彉銆傚悓鏃跺湪杩300骞撮噷锛屽湴鐞冧笂涔熸湁300澶氱缇庝附鐨勫姩鐗╂案杩滃湴绂绘垜浠屽幓浜嗐備粠1600锝1800骞撮棿锛屽湴鐞冧笂鐨勯笩绫诲拰鍏界被鐗╃鐏粷25绉嶏紱浠1800锝1950骞...
绛旓細澶х害6500涓骞村墠銆傚叧浜庢亹榫欑伃缁濈殑鍘熷洜鏈夊绉嶈娉曪紝鏈鐩涜鐨勪竴绉嶈娉曟槸涓棰楀皬琛屾槦鎾炲嚮鍦扮悆閫犳垚澶ч噺缁胯壊妞嶇墿鐏粷锛屾亹榫欐病鏈夐鐗╂潵婧愶紝涔冭嚦鐏粷锛屼絾鑰冨彜鐮旂┒琛ㄦ槑锛屾亹榫欑伃缁濇寔缁簡100涓囧勾鏃堕棿銆傛亹榫欑殑鍏ㄧ洓鏃舵湡鍦ㄤ緩缃楃邯鍜岀櫧鍨╃邯鍓嶆湡锛屾亹榫欒泲鍖栫煶鍗村彧鍦ㄧ櫧鍨╃邯鏅氭湡鍑虹幇锛岃繖璇存槑寰堝彲鑳藉湪渚忕綏绾拰鐧藉灘绾墠鏈燂紝鎭愰緳鐨勫鍖...
绛旓細鎭愰緳娑堝け浜庡叚鍗5鐧句竾骞村墠鐨鐧藉灘绾-绗笁绾伃缁濅簨浠讹紙Cretaceous-Tertiary extinction event锛夈傞氬父鐨勮В閲婃槸涓棰楀法澶х殑闄ㄧ煶鎾炲嚮鍦扮悆閫犳垚浜嗙伃缁濓紙鏈鏃╀负鍔犲窞澶у鏌忓厠鑾卞垎鏍$殑璺槗锛庨樋灏斿反鍒楁柉(Walter Alvarez)鍗氬+绛夊洓浣嶇瀛﹀鎵鎻愬嚭锛夈備絾杩欎竴鐞嗚灏氭湁浜夎銆備竴鑸櫒鐭崇殑璇存硶涔冩寚闄ㄧ煶鎾炲嚮鍦扮悆鍚庯紝澶ч噺鐨勭伆灏樻毚娣规病澶у湴...
绛旓細绗笁娆★細浜屽彔绾ぇ鐏粷锛屽彂鐢熶簬2.45浜骞村墠锛岃繖涓鏃舵湡鍦扮悆鍐呴儴娲诲姩杈冧负鍓х儓锛岀伀灞卞拰鍦伴渿娲诲姩棰戠箒锛屾捣骞抽潰娑ㄨ惤鍜屽ぇ闄嗘紓绉閫熷害杈冨揩锛屽鑷村湴鐞冪敓鎬佺郴缁熷彈鍒颁簡涓ラ噸鐨勭牬鍧忥紝寰堝鐗╃閮藉け鍘讳簡鐢熷瓨绌洪棿锛屽ぇ瀹惰涓鸿繖娆$敓鐗╁ぇ鐏粷瀵艰嚧鍦扮悆涓96%鐨勭墿绉嶇伃缁濓紝鏄簲娆″ぇ鐏粷涓渶涓ラ噸鐨勪竴娆°傜鍥涙锛氫笁鍙犵邯澶х伃缁濓紝鍙戠敓鍦...
绛旓細鏈夌瀛﹀浼拌,濡傛灉娌℃湁浜虹被鐨勫共鎵,鍦ㄨ繃鍘荤殑2浜垮勾涓,骞冲潎澶х害姣100骞存湁90绉嶈剨妞庡姩鐗╃伃缁,骞冲潎姣27骞存湁涓涓珮绛夋鐗╃伃缁濄備絾鏄洜涓轰汉绫荤殑骞叉壈,浣块笩绫诲拰鍝轰钩绫诲姩鐗╃伃缁鐨勯熷害鎻愰珮浜100鍊嶅埌1000鍊嶃 缇庡浗鏉滃厠澶у钁楀悕鐢熺墿瀛﹀鏂浘浜氱壒路鐨璁や负,濡傛灉鐗╃浠ヨ繖鏍风殑閫熷害鍑忓皯涓嬪幓,鍒2050骞,鐩墠鐨勫洓鍒嗕箣涓鍒颁竴鍗婄殑鐗╃灏...