三九養(yǎng)生堂記者 鄧肯·蓋伊 報道
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??(hui)飛??(fei)往??(wang)西??(xi)藏??(zang)越??(yue)冬??(dong)??，然??(ran)而??(er)??，吐??(tu)拉??(la)牧?(mu)場??(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??(ce)數(shù)??(shu)據(jù)??(ju)顯??(xian)示??(shi)??，吐??(tu)拉??(la)牧??(mu)場??(chang)的?(de)黑?(hei)頸??(jing)鶴??(he)數(shù)??(shu)量??(liang)在??(zai)過??(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??(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??(chang)趨??(qu)勢??(shi)顯?(xian)得??(de)尤?(you)為??(wei)可??(ke)觀??(guan)???！ ⌒??(xin)疆??(jiang)瑪??(ma)納??(na)斯??(si)國??(guo)家??(jia)濕??(shi)地??(di)公??(gong)園??(yuan)每??(mei)年??(nian)候??(hou)鳥??(niao)遷??(qian)徙??(xi)期??(qi)間??(jian)??，數(shù)??(shu)量??(liang)最??(zui)多??(duo)時??(shi)可??(ke)達(dá)??(da)上??(shang)萬??(wan)只??(zhi)??。??春??(chun)季??(ji)的?(de)3月??(yue)至??(zhi)5月??(yue)??，白??(bai)鷺??(lu)、鸕??(lu)鶿??(ci)、蒼?(cang)鷺?(lu)等??(deng)大??(da)量??(liang)候??(hou)鳥??(niao)在??(zai)此??(ci)繁?(fan)衍??(yan)后??(hou)代??(dai)；而??(er)秋??(qiu)季??(ji)的??(de)9月??(yue)到??(dao)11月??(yue)??，天??(tian)鵝??(e)、灰??(hui)鶴??(he)、灰??(hui)雁??(yan)、赤??(chi)麻??(ma)鴨??(ya)等??(deng)則??(ze)在??(zai)此??(ci)停??(ting)歇??(xie)??，補(bǔ)??(bu)充??(chong)能??(neng)量?(liang)??。然??(ran)而??(er)近??(jin)年??(nian)來秘(lai)??，這祝(zhe)種??(zhong)現(xiàn)??(xian)象??(xiang)在??(zai)不??(bu)斷??(duan)變??(bian)化??(hua)??。
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