Tree deaths linked to climate change
<p><span word="Hot">Hot</span> <span word="and">and</span> <span word="dry">dry</span> <span word="conditions">conditions</span> <span word="triggered">triggered</span> <span word="by">by</span> <span word="climate">climate</span> <span word="change">change</span> <span word="are">are</span> <span word="killing">killing</span> <span word="the">the</span> <span word="world">world</span>'<span word="s">s</span> <span word="trees">trees</span>, <span word="according">according</span> <span word="to">to</span> <span word="a">a</span> <span word="new">new</span> <span word="report">report</span> <span word="which">which</span> <span word="examines">examines</span> <span word="dozens">dozens</span> <span word="of">of</span> <span word="scientific">scientific</span> <span word="articles">articles</span> <span word="on">on</span> <span word="the">the</span> <span word="subject">subject</span>.</p><p><span word="Stanford">Stanford</span> <span word="University">University</span> <span word="graduate">graduate</span> <span word="student">student</span> <span word="William">William</span> <span word="Anderegg">Anderegg</span> <span word="has">has</span> <span word="seen">seen</span> <span word="this">this</span> <span word="forest">forest</span> <span word="die">die</span>-<span word="off">off</span> <span word="firsthand">firsthand</span>.</p><p><span word="His">His</span> <span word="doctoral">doctoral</span> <span word="thesis">thesis</span> <span word="documents">documents</span> <span word="the">the</span> <span word="impact">impact</span> <span word="of">of</span> <span word="drought">drought</span> <span word="on">on</span> <span word="trembling">trembling</span> <span word="aspen">aspen</span>, <span word="the">the</span> <span word="most">most</span> <span word="common">common</span> <span word="tree">tree</span> <span word="in">in</span> <span word="North">North</span> <span word="America">America</span>.</p><p>“<span word="These">These</span> <span word="are">are</span> <span word="complete">complete</span> <span word="hillsides">hillsides</span> <span word="of">of</span> <span word="trembling">trembling</span> <span word="aspens">aspens</span> <span word="that">that</span> <span word="are">are</span> <span word="dying">dying</span> <span word="off">off</span>," <span word="Anderegg">Anderegg</span> <span word="says">says</span>. "<span word="And">And</span> <span word="when">when</span> <span word="the">the</span> <span word="main">main</span> <span word="tree">tree</span> <span word="in">in</span> <span word="a">a</span> <span word="forest">forest</span> <span word="goes">goes</span>, <span word="you">you</span> <span word="tend">tend</span> <span word="to">to</span> <span word="see">see</span> <span word="a">a</span> <span word="lot">lot</span> <span word="of">of</span> <span word="the">the</span> <span word="other">other</span> <span word="species">species</span>, <span word="especially">especially</span> <span word="the">the</span> <span word="grasses">grasses</span> <span word="and">and</span> <span word="the">the</span> <span word="wild">wild</span> <span word="flowers">flowers</span>, <span word="tend">tend</span> <span word="to">to</span> <span word="disappear">disappear</span> <span word="as">as</span> <span word="well">well</span>. <span word="But">But</span> <span word="you">you</span> <span word="lose">lose</span> <span word="a">a</span> <span word="lot">lot</span> <span word="of">of</span> <span word="those">those</span> <span word="species">species</span> <span word="from">from</span> <span word="those">those</span> <span word="forests">forests</span>.”</p><p><span word="Changing">Changing</span> <span word="ecology">ecology</span></p><p><span word="With">With</span> <span word="colleagues">colleagues</span> <span word="from">from</span> <span word="Stanford">Stanford</span> <span word="and">and</span> <span word="North">North</span> <span word="Arizona">Arizona</span> <span word="State">State</span> <span word="University">University</span>, <span word="Anderegg">Anderegg</span> <span word="co">co</span>-<span word="authored">authored</span> <span word="the">the</span> <span word="new">new</span> <span word="report">report</span> <span word="which">which</span> <span word="presents">presents</span> <span word="a">a</span> <span word="picture">picture</span> <span word="of">of</span> <span word="accelerating">accelerating</span> <span word="worldwide">worldwide</span> <span word="tree">tree</span> <span word="deaths">deaths</span> <span word="that">that</span> <span word="appear">appear</span> <span word="to">to</span> <span word="be">be</span> <span word="linked">linked</span> <span word="to">to</span> <span word="changes">changes</span> <span word="in">in</span> <span word="the">the</span> <span word="global">global</span> <span word="climate">climate</span>.</p><p><span word="Anderegg">Anderegg</span> <span word="says">says</span> <span word="these">these</span> <span word="changes">changes</span>, <span word="triggered">triggered</span> <span word="by">by</span> <span word="rising">rising</span> <span word="levels">levels</span> <span word="of">of</span> <span word="heat">heat</span>-<span word="trapping">trapping</span> <span word="gases">gases</span> <span word="in">in</span> <span word="the">the</span> <span word="atmosphere">atmosphere</span>, <span word="are">are</span> <span word="stressing">stressing</span> <span word="the">the</span> <span word="world">world</span>’<span word="s">s</span> <span word="forests">forests</span>.</p><p>“<span word="One">One</span> <span word="of">of</span> <span word="the">the</span> <span word="ways">ways</span> <span word="that">that</span> <span word="we">we</span> <span word="expect">expect</span> <span word="climate">climate</span> <span word="change">change</span> <span word="to">to</span> <span word="increasingly">increasingly</span> <span word="play">play</span> <span word="out">out</span> <span word="in">in</span> <span word="forests">forests</span> <span word="is">is</span> <span word="through">through</span> <span word="these">these</span> <span word="widespread">widespread</span> <span word="tree">tree</span> <span word="mortality">mortality</span> <span word="events">events</span> <span word="where">where</span> <span word="you">you</span> <span word="stress">stress</span> <span word="the">the</span> <span word="trees">trees</span> <span word="enough">enough</span> <span word="that">that</span> <span word="you">you</span> <span word="essentially">essentially</span> <span word="push">push</span> <span word="a">a</span> <span word="whole">whole</span> <span word="region">region</span> <span word="of">of</span> <span word="them">them</span> <span word="off">off</span> <span word="the">the</span> <span word="edge">edge</span> <span word="and">and</span> <span word="in">in</span> <span word="fact">fact</span> <span word="what">what</span> <span word="happens">happens</span> <span word="afterwards">afterwards</span>, <span word="after">after</span> <span word="a">a</span> <span word="forest">forest</span> <span word="dies">dies</span> <span word="from">from</span> <span word="drought">drought</span> <span word="is">is</span> <span word="every">every</span> <span word="bit">bit</span> <span word="as">as</span> <span word="important">important</span> <span word="and">and</span> <span word="in">in</span> <span word="some">some</span> <span word="sense">sense</span> <span word="matters">matters</span> <span word="more">more</span> <span word="to">to</span> <span word="humans">humans</span> <span word="who">who</span> <span word="rely">rely</span> <span word="on">on</span> <span word="forests">forests</span>.”</p>
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