三九養(yǎng)生堂記者 鄧肯·蓋伊 報(bào)道
精彩| 徐??(xu)俊??(jun)泉??(quan)分??(fen)析??(xi)指??(zhi)出??(chu)??，大??(da)部??(bu)分??(fen)黑??(hei)頸??(jing)鶴??(he)每??(mei)年??(nian)在??(zai)10月??(yue)初??(chu)都?(dou)會(huì)??(hui)飛??(fei)往??(wang)西?(xi)藏??(zang)越??(yue)冬??(dong)??，然??(ran)而??(er)??，吐??(tu)拉??(la)牧??(mu)場(chǎng)??(chang)的??(de)黑??(hei)頸??(jing)鶴??(he)已??(yi)經(jīng)??(jing)成??(cheng)為??(wei)“常??(chang)住?(zhu)居??(ju)民??(min)”??，因?(yin)為??(wei)這??(zhe)里??(li)的??(de)氣??(qi)候??(hou)已??(yi)經(jīng)??(jing)適??(shi)應(yīng)??(ying)了??(le)它??(ta)們?(men)的??(de)生??(sheng)存?(cun)需??(xu)求?(qiu)??。??據(jù)??(ju)監(jiān)??(jian)測(cè)??(ce)數(shù)??(shu)據(jù)??(ju)顯??(xian)示??(shi)??，吐??(tu)拉??(la)牧??(mu)場(chǎng)??(chang)的??(de)黑??(hei)頸??(jing)鶴?(he)數(shù)??(shu)量??(liang)在??(zai)過(guò)??(guo)去??(qu)十??(shi)多??(duo)年?(nian)間??(jian)從??(cong)最??(zui)初??(chu)的??(de)十??(shi)幾??(ji)只??(zhi)增??(zeng)長(zhǎng)??(chang)到??(dao)目??(mu)前?(qian)的??(de)近??(jin)五?(wu)十?(shi)只??(zhi)??。由??(you)于??(yu)黑??(hei)頸??(jing)鶴??(he)繁??(fan)殖??(zhi)速??(su)度??(du)較??(jiao)慢??(man)??，每??(mei)兩??(liang)三??(san)年??(nian)才??(cai)能??(neng)繁??(fan)殖??(zhi)一??(yi)次??(ci)??，因??(yin)此?(ci)這??(zhe)一??(yi)增??(zeng)長(zhǎng)??(chang)趨??(qu)勢(shì)??(shi)顯??(xian)得??(de)尤??(you)為??(wei)可??(ke)觀??(guan)???！ ≈??(zhong)國(guó)??(guo)科??(ke)學(xué)??(xue)院??(yuan)新??(xin)疆??(jiang)生??(sheng)態(tài)??(tai)與??(yu)地??(di)理?(li)研??(yan)究??(jiu)所??(suo)研?(yan)究??(jiu)員??(yuan)馬?(ma)鳴??(ming)指??(zhi)出??(chu)??，候??(hou)鳥(niǎo)??(niao)變??(bian)“留?(liu)鳥(niǎo)?(niao)”的??(de)種??(zhong)群??(qun)數(shù)??(shu)量??(liang)創(chuàng)??(chuang)下??(xia)了??(le)新??(xin)紀(jì)??(ji)錄??(lu)??。?尤??(you)其??(qi)是??(shi)冬??(dong)季??(ji)遷??(qian)徙??(xi)鳥(niǎo)??(niao)類??(lei)中?(zhong)的?(de)天??(tian)鵝??(e)、灰??(hui)鶴??(he)、灰??(hui)雁??(yan)和??(he)赤??(chi)麻??(ma)鴨??(ya)等??(deng)鳥(niǎo)??(niao)類??(lei)??，變??(bian)成??(cheng)“留??(liu)鳥(niǎo)??(niao)”的??(de)數(shù)??(shu)量??(liang)較??(jiao)多??(duo)??。
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責(zé)編：楊之光
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責(zé)編：呂程平