气候混乱,大黄蜂濒临灭绝——“我们现在进入了世界第六次大灭绝事件”

时间:2020-04-27 22:08 来源:seo 作者:小可爱科技知识网 点击量:

气候混乱,大黄蜂濒临灭绝——“我们现在进入了世界第六次大灭绝事件”

渥太华大学的研究人员开发了预测气候变化对物种灭绝风险影响的技术。

When+you+were+young%2c+were+you+the+type+of+child+who+would+scour+open+fields+looking+for+bumble+bees%3f+Today%2c+it+is+much+harder+for+kids+to+spot+them%2c+since+bumble+bees+are+drastically+declining+in+North+America+and+in+Europe.%0a%0a%26ldquo%3bWe+have+now+entered+the+world%26rsquo%3bs+sixth+mass+extinction+event%2c+the+biggest+and+most+rapid+global+biopersity+crisis+since+a+meteor+ended+the+age+of+the+dinosaurs.%26rdquo%3b+%26mdash%3b+Peter+Soroye%0a%0aA+new+study+from+the+University+of+Ottawa+found+that+in+the+course+of+a+single+human+generation%2c+the+likelihood+of+a+bumble+bee+population+surviving+in+a+given+place+has+declined+by+an+average+of+over+30%25.%0aPeter+Soroye%2c+a+Ph.D.+student+in+the+Department+of+Biology+at+the+University+of+Ottawa%2c+Jeremy+Kerr%2c+professor+at+the+University+of+Ottawa+and+head+of+the+lab+group+Peter+is+in%2c+along+with+Tim+Newbold%2c+research+fellow+at+UCL+(University+College+London)%2c+linked+the+alarming+idea+of+%26rdquo%3bclimate+chaos%26rdquo%3b+to+extinctions%2c+and+showed+that+those+extinctions+began+decades+ago.%0a%26ldquo%3bWe%26rsquo%3bve+known+for+a+while+that+climate+change+is+related+to+the+growing+extinction+risk+that+animals+are+facing+around+the+world%2c%26rdquo%3b+first+author+Peter+Soroye+explained.+%26ldquo%3bIn+this+paper%2c+we+offer+an+answer+to+the+critical+questions+of+how+and+why+that+is.+We+find+that+species+extinctions+across+two+continents+are+caused+by+hotter+and+more+frequent+extremes+in+temperatures.%26rdquo%3b%0a%26ldquo%3bWe+have+now+entered+the+world%26rsquo%3bs+sixth+mass+extinction+event%2c+the+biggest+and+most+rapid+global+biopersity+crisis+since+a+meteor+ended+the+age+of+the+dinosaurs%2c+%26rdquo%3b+says+Peter+Soroye.%0aMassive+decline+of+the+most+important+pollinators+on+Earth%0a%26ldquo%3bBumble+bees+are+the+best+pollinators+we+have+in+wild+landscapes+and+the+most+effective+pollinators+for+crops+like+tomato%2c+squash%2c+and+berries%2c%26rdquo%3b+Peter+Soroye+observed.+%26ldquo%3bOur+results+show+that+we+face+a+future+with+many+less+bumble+bees+and+much+less+persity%2c+both+in+the+outdoors+and+on+our+plates.%26rdquo%3b%0a%0aClimate+change+means+places+are+getting+hotter+than+ever+before%2c+and+these+extremes+appear+to+be+driving+the+disappearance+of+bumble+bees+across+continents.+Credit%3a+Peter+Soroye%2c+University+of+Ottawa.%0aThe+researchers+discovered+that+bumble+bees+are+disappearing+at+rates+%26ldquo%3bconsistent+with+a+mass+extinction.%26rdquo%3b%0a%26ldquo%3bIf+declines+continue+at+this+pace%2c+many+of+these+species+could+vanish+forever+within+a+few+decades%2c%26rdquo%3b+Peter+Soroye+warned.%0aThe+technique%0a%26ldquo%3bWe+know+that+this+crisis+is+entirely+driven+by+human+activities%2c%26rdquo%3b+Peter+Soroye+said.+%26ldquo%3bSo%2c+to+stop+this%2c+we+needed+to+develop+tools+that+tell+us+where+and+why+these+extinctions+will+occur.%26rdquo%3b%0a%0a%26ldquo%3bPredicting+why+bumble+bees+and+other+species+are+going+extinct+in+a+time+of+rapid%2c+human-caused+climate+change+could+help+us+prevent+extinction+in+the+21st+century.%26rdquo%3b+%26mdash%3b+Dr.+Jeremy+Kerr%0a%0aThe+researchers+looked+at+climate+change+and+how+it+increases+the+frequency+of+really+extreme+events+like+heatwaves+and+droughts%2c+creating+a+sort+of+%26ldquo%3bclimate+chaos%26rdquo%3b+which+can+be+dangerous+for+animals.+Knowing+that+species+all+have+different+tolerances+for+temperature+(what%26rsquo%3bs+too+hot+for+some+might+not+be+for+others)%2c+they+developed+a+new+measurement+of+temperature.%0a%26ldquo%3bWe+have+created+a+new+way+to+predict+local+extinctions+that+tells+us%2c+for+each+species+inpidually%2c+whether+climate+change+is+creating+temperatures+that+exceed+what+the+bumble+bees+can+handle%2c%26rdquo%3b+Dr.+Tim+Newbold+explained.%0aUsing+data+on+66+different+bumble+bee+species+across+North+America+and+Europe+that+have+been+collected+over+a+115-year+period+(1900-2015)+to+test+their+hypothesis+and+new+technique%2c+the+researchers+were+able+to+see+how+bumble+bee+populations+have+changed+by+comparing+where+bees+are+now+to+where+they+used+to+be+historically.%0a%26ldquo%3bWe+found+that+populations+were+disappearing+in+areas+where+the+temperatures+had+gotten+hotter%2c%26rdquo%3b+Peter+Soroye+said.+%26ldquo%3bUsing+our+new+measurement+of+climate+change%2c+we+were+able+to+predict+changes+both+for+inpidual+species+and+for+whole+communities+of+bumble+bees+with+a+surprisingly+high+accuracy.%26rdquo%3b%0aA+new+horizon+of+research%0aThis+study+doesn%26rsquo%3bt+end+here.+In+fact%2c+it+opens+the+doors+to+new+research+horizons+to+track+extinction+levels+for+other+species+like+reptiles%2c+birds%2c+and+mammals.%0a%26ldquo%3bPerhaps+the+most+exciting+element+is+that+we+developed+a+method+to+predict+extinction+risk+that+works+very+well+for+bumble+bees+and+could+in+theory+be+applied+universally+to+other+organisms%2c%26rdquo%3b+Peter+Soroye+indicated.+%26ldquo%3bWith+a+predictive+tool+like+this%2c+we+hope+to+identify+areas+where+conservation+actions+would+be+critical+to+stopping+declines.%26rdquo%3b%0a%26ldquo%3bPredicting+why+bumble+bees+and+other+species+are+going+extinct+in+a+time+of+rapid%2c+human-caused+climate+change+could+help+us+prevent+extinction+in+the+21st+century%2c%26rdquo%3b+says+Dr.+Jeremy+Kerr.%0aThere+is+still+time+to+act%0a%26ldquo%3bThis+work+also+holds+out+hope+by+implying+ways+that+we+might+take+the+sting+out+of+climate+change+for+these+and+other+organisms+by+maintaining+habitats+that+offer+shelter%2c+like+trees%2c+shrubs%2c+or+slopes%2c+that+could+let+bumble+bees+get+out+of+the+heat%2c%26rdquo%3b+Dr.+Kerr+said.+%26ldquo%3bUltimately%2c+we+must+address+climate+change+itself+and+every+action+we+take+to+reduce+emissions+will+help.+The+sooner+the+better.+It+is+in+all+our+interests+to+do+so%2c+as+well+as+in+the+interests+of+the+species+with+whom+we+share+the+world.%26rdquo%3b%0aReference%3a+%26ldquo%3bClimate+change+contributes+to+widespread+declines+among+bumble+bees+across+continents%26rdquo%3b+by+Peter+Soroye%2c+Tim+Newbold+and+Jeremy+Kerr%2c+7+February+2020%2c+Science.%0aDOI%3a+10.1126%2fscience.aax8591%0aThe+paper+Climate+change+contributes+to+widespread+declines+among+bumble+bees+across+continents+is+published+in+Science.%0aFunding%3a+J.K.+is+grateful+for+Discovery+Grant+and+Discovery+Accelerator+Supplement+from+the+Natural+Sciences+and+Engineering+Research+Council+of+Canada+(NSERC)+and+funds+from+his+University+Research+Chair+in+Macroecology+and+Conservation+at+the+University+of+Ottawa.+J.K.+is+also+supported+through+infrastructure+funds+from+the+Canada+Foundation+for+Innovation.+This+collaboration+was+funded+by+a+Royal+Society+grant+to+T.N.+and+J.K.+and+an+NSERC+Postgraduate+Scholarship+award+to+P.S.+to+work+with+J.K.+T.N.+was+supported+by+a+Royal+Society+University+Research+Fellowship+and+a+grant+from+the+UK+Natural+Environment+Research+Council+(NE%2fR010811%2f1).

当前位置:主页 > 生物学知识 >

声明:本文小可爱科技知识网整理不代表个人观点,转载请注明原文,点击还能查看更多的文章;本文网址: http://www.kozbods.com/shengwu/1366.html

围观: 次 | 责任编辑:小可爱科技知识网



回到顶部