南极气候变化影响海狗数量
<p> 南极气候变化影响海狗数量 <span word="Changes">Changes</span> <span word="in">in</span> <span word="the">the</span> <span word="Antarctic">Antarctic</span> <span word="climate">climate</span> <span word="are">are</span> <span word="showing">showing</span> <span word="up">up</span> <span word="in">in</span> <span word="the">the</span> <span word="fur">fur</span> <span word="seal">seal</span> <span word="population">population</span>, <span word="say">say</span> <span word="scientists">scientists</span>. 科学家称，南极气候变化正在通过海狗种群的数量表现出来。 <span word="Three">Three</span> <span word="decades">decades</span> <span word="of">of</span> <span word="data">data</span> <span word="show">show</span> <span word="the">the</span> <span word="females">females</span> <span word="of">of</span> <span word="this">this</span> <span word="species">species</span> <span word="are">are</span> <span word="being">being</span> <span word="born">born</span> <span word="smaller">smaller</span>, <span word="and">and</span> <span word="those">those</span> <span word="that">that</span> <span word="do">do</span> <span word="survive">survive</span> <span word="to">to</span> <span word="motherhood">motherhood</span> <span word="are">are</span> <span word="breeding">breeding</span> <span word="later">later</span> <span word="in">in</span> <span word="life">life</span>. <span word="Subtle">Subtle</span> <span word="changes">changes</span> <span word="in">in</span> <span word="their">their</span> <span word="genetics">genetics</span> <span word="are">are</span> <span word="also">also</span> <span word="being">being</span> <span word="recorded">recorded</span>. <span word="Researchers">Researchers</span> <span word="tell">tell</span> <span word="the">the</span> <span word="journal">journal</span> <span word="Nature">Nature</span> <span word="that">that</span> <span word="a">a</span> <span word="shift">shift</span> <span word="in">in</span> <span word="a">a</span> <span word="dominant">dominant</span> <span word="climate">climate</span> <span word="pattern">pattern</span> <span word="has">has</span> <span word="affected">affected</span> <span word="the">the</span> <span word="supply">supply</span> <span word="of">of</span> <span word="the">the</span> <span word="seals">seals</span> <span word="primary">primary</span> <span word="food">food</span> <span word="source">source</span> - <span word="krill">krill</span>. <span word="There">There</span> <span word="has">has</span> <span word="been">been</span> <span word="a">a</span> <span word="significant">significant</span> <span word="reduction">reduction</span> <span word="in">in</span> <span word="the">the</span> <span word="size">size</span> <span word="and">and</span> <span word="the">the</span> <span word="mass">mass</span> <span word="of">of</span> <span word="the">the</span> <span word="pups">pups</span> <span word="at">at</span> <span word="birth">birth</span>, <span word="explained">explained</span> <span word="Dr">Dr</span> <span word="Jaume">Jaume</span> <span word="Forcada">Forcada</span> <span word="from">from</span> <span word="the">the</span> <span word="British">British</span> <span word="Antarctic">Antarctic</span> <span word="Survey">Survey</span> . <span word="Over">Over</span> 27 <span word="years">years</span>, <span word="we">we</span> <span word="see">see</span> <span word="pups">pups</span> <span word="being">being</span> <span word="born">born</span> <span word="with">with</span> 8% <span word="less">less</span> <span word="body">body</span> <span word="mass">mass</span>. <span word="We">We</span> <span word="also">also</span> <span word="see">see</span> <span word="the">the</span> <span word="females">females</span> <span word="breeding">breeding</span> <span word="later">later</span> <span word="in">in</span> <span word="age">age</span> - <span word="at">at</span> <span word="least">least</span> <span word="by">by</span> <span word="one">one</span> <span word="or">or</span> <span word="two">two</span> <span word="years">years</span>. <span word="And">And</span> <span word="when">when</span> <span word="they">they</span> <span word="start">start</span> <span word="breeding">breeding</span>, <span word="they">they</span> <span word="are">are</span> <span word="bigger">bigger</span> <span word="than">than</span> <span word="they">they</span> <span word="used">used</span> <span word="to">to</span> <span word="be">be</span> 30 <span word="years">years</span> <span word="ago">ago</span>. <span word="This">This</span> <span word="kind">kind</span> <span word="of">of</span> <span word="thing">thing</span> <span word="has">has</span> <span word="been">been</span> <span word="seen">seen</span> <span word="before">before</span> <span word="in">in</span> <span word="all">all</span> <span word="sorts">sorts</span> <span word="of">of</span> <span word="mammals">mammals</span>, <span word="and">and</span> <span word="is">is</span> <span word="classically">classically</span> <span word="an">an</span> <span word="indication">indication</span> <span word="of">of</span> <span word="food">food</span> <span word="stress">stress</span>. <span word="The">The</span> <span word="study">study</span> <span word="was">was</span> <span word="centred">centred</span> <span word="on">on</span> <span word="South">South</span> <span word="Georgia">Georgia</span>, <span word="a">a</span> <span word="British">British</span> <span word="Overseas">Overseas</span> <span word="Territory">Territory</span> <span word="in">in</span> <span word="the">the</span> <span word="South">South</span> <span word="Atlantic">Atlantic</span> <span word="that">that</span> <span word="falls">falls</span> <span word="within">within</span> <span word="the">the</span> <span word="influence">influence</span> <span word="of">of</span> <span word="Antarctic">Antarctic</span> <span word="waters">waters</span>.</p><p> </p>
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