气候变暖让灰熊弃荤从素改吃浆果
<p><span word="Grizzly">Grizzly</span> <span word="bears">bears</span> <span word="have">have</span> <span word="stopped">stopped</span> <span word="eating">eating</span> <span word="salmon">salmon</span> <span word="in">in</span> <span word="favour">favour</span> <span word="of">of</span> <span word="elderberries">elderberries</span> <span word="after">after</span> <span word="being">being</span> <span word="forced">forced</span> <span word="to">to</span> <span word="make">make</span> <span word="a">a</span> <span word="choice">choice</span> <span word="due">due</span> <span word="to">to</span> <span word="climate">climate</span> <span word="change">change</span>. <span word="Warming">Warming</span> <span word="temperatures">temperatures</span> <span word="meant">meant</span> <span word="that">that</span> <span word="the">the</span> <span word="berries">berries</span> <span word="are">are</span> <span word="ripening">ripening</span> <span word="earlier">earlier</span> <span word="than">than</span> <span word="usual">usual</span>, <span word="at">at</span> <span word="exactly">exactly</span> <span word="the">the</span> <span word="same">same</span> <span word="time">time</span> <span word="as">as</span> <span word="the">the</span> <span word="freshwater">freshwater</span> <span word="streams">streams</span> <span word="on">on</span> <span word="Alaska">Alaska</span>’<span word="s">s</span> <span word="Kodiak">Kodiak</span> <span word="Island">Island</span> <span word="are">are</span> <span word="overflowing">overflowing</span> <span word="with">with</span> <span word="sockeye">sockeye</span> <span word="salmon">salmon</span>.</p><p>由于气候变化的影响，灰熊被迫做出艰难抉择，放弃鲑鱼改吃接骨木果。温暖的气候使得浆果成熟期提前，与此同时，阿拉斯加科迪亚克岛的淡水河流里也挤满了红鲑。</p><p><span word="The">The</span> <span word="island">island</span>'<span word="s">s</span> <span word="brown">brown</span> <span word="bears">bears</span> <span word="typically">typically</span> <span word="feed">feed</span> <span word="first">first</span> <span word="on">on</span> <span word="salmon">salmon</span> <span word="in">in</span> <span word="early">early</span> <span word="summer">summer</span>, <span word="followed">followed</span> <span word="by">by</span> <span word="elderberries">elderberries</span> <span word="later">later</span> <span word="in">in</span> <span word="the">the</span> <span word="season">season</span>, <span word="in">in</span> <span word="late">late</span> <span word="August">August</span> <span word="and">and</span> <span word="September">September</span>.</p><p>往年，岛上的棕熊在夏初先吃了鲑鱼，然后在八月末和九月吃接骨木果。</p>
页:
[1]