年国际生物多样性日主题生物多样性与气候变化
前言：本站为你精心整理了年国际生物多样性日主题生物多样性与气候变化范文，希望能为你的创作提供参考价值，我们的客服老师可以帮助你提供个性化的参考范文，欢迎咨询。
生物多样性公约秘书处非常高兴地宣布：2007年5月22日，即国际生物多样性日关注的焦点将是“生物多样性与气候变化”。
TheSecretariatoftheConventiononBiologicalDiversityispleasedtoannouncethefocusofthe2007InternationalDayforBiologicalDiversity(IBD),22May,willbeon:
BiodiversityandClimateChange
Thiscomplementsthedesignationof2007astheInternationalPolarYearandcoincideswithUNEP’SWorldEnvironmentDaythemeofClimateChange.Lectures,seminars,filmpresentations,culturalevents,exhibitionsandschooloutreachactivitiesarejustsomesuggestionsthatyoumaywishtoimplementtohelpdrawattentiontooneofthemostcriticalissuesfacingourplanettoday.
FacingClimateChange
Sincethemid-1800sglobaltemperatureshaveincreasedbyabout0.6°C,impactingtheentireworld,fromlow-lyingislandsinthetropicstothevastPolarRegions.DuringthelastCentury:
1.thelargestglacieronMountKenyahaslost92%ofitsmass,
2.sealevelshaverisenby10-25cm,and
3.thethicknessofseaiceinthearctichasdecreasedby40%.
Currentclimatechangepredictionsarenotencouraging;theyestimatefurtherincreasesintemperaturesof1.4°Cto5.8°Cby2100.
Predictedimpactsfromatemperatureincreaseofonly2.5°Cinclude:
1.210millionmorepeopleatriskfrommalaria,
2.upto3.1billionmorepeoplesufferingfromwaterscarcity,and
3.50millionmorepeoplefacinghunger.
Evenifallhumansourcesofgreenhousegasemissionsarestoppedimmediately,theimpactsofclimatechangewouldcontinuefor50years.
TheNewGreatThreattoBiodiversity
Climatechangeisalreadyforcingbiodiversitytoadapteitherthroughshiftinghabitat,changinglifecycles,orthedevelopmentofnewphysicaltraits.Impactsalreadyobservedinclude:
1.Coralbleaching,causedbyincreasedseatemperatures,iscausingdie-offsamongstcoralreefcommunitiesfromAustraliatotheCaribbean.
2.TheCommonMurrehasadvancedbreedingby24daysperdecadeoverthepast50yearsinresponsetohighertemperatures.
3.TheBaltimoreorioleisshiftingnorthwardandmaysoondisappearentirelyfromtheBaltimorearea.
4.Polarbearpopulationsarecomingunderthreatasfoodbecomeshardertohunt.
Otherspecieswillfacemoreunusualchallenges.Thesexofseaturtlehatchlings,forexample,istemperaturedependentwithwarmertemperaturesincreasingthenumberoffemaleseaturtlesattheexpenseofmales.
Thosespeciesthatareunabletoadaptarefacingextinction.Infact,predictionsestimatethatupto1millionspeciesmaybecomeextinctasaresultofclimatechangeincludingBoyd’sforestdragonandBrazil’sVirolasebiferatree.
TherecentlyextinctGoldenToadandGastricBroodingFroghavealreadybeenlabeledasthefirstvictimsofclimatechange.
TheBiodiversitySafetyNet
Thelinksbetweenbiodiversityandclimatechangerunbothways:biodiversityisthreatenedbyhuman-inducedclimatechangebut,biodiversityresourcescanreducetheimpactsofclimatechangeonpeopleandproduction:
1.theconservationofhabitatscanreducetheamountofCO2releasedintotheatmosphere.Currentlydeforestationisestimatedtoberesponsiblefor20%ofhuman-inducedCO2emissions,
2.conservingcertainspeciessuchasmangrovesanddroughtresistantcropscanreducethedisastrousimpactsofclimatechangeeffectssuchasfloodingandfamine,and
3.theconservationandsustainableuseofbiodiversitycanstrengthenecosystemresilience,improvingtheabilityofecosystemstoprovidecriticalservicesinthefaceofincreasingclimaticpressures.
Usingbiodiversityresourcestomitigateoradapttoclimatechangeisofparticularimportancetovulnerablepopulationssuchaspeoplelivinginlow-lyingareasordevelopingcountriesandindigenouscommunities.
RespondingActions
Giventheimportanceofclimatechange-biodiversitylinks,itisimportantto:
1.conservebiodiversitythatisespeciallysensitivetoclimatechange,
2.preservehabitatssoastofacilitatethelong-termadaptationofbiodiversity,
3.improveourunderstandingofclimatechange–biodiversitylinkages,and
4.fullyintegratebiodiversityconsiderationsintomitigationandadaptationplans.
22May2007–ClimateChangeandBiodiversityHaveTheirDay
Climatechangetouchesthelivesofpeopleandbiodiversityineverycountry.
