前言：本站為你精心整理了年國際生物多樣性日主題生物多樣性與氣候變化范文，希望能為你的創(chuàng)作提供參考價(jià)值，我們的客服老師可以幫助你提供個(gè)性化的參考范文，歡迎咨詢。

國際生物多樣性日 國際生物多樣性日

生物多樣性公約秘書處非常高興地宣布：2007年5月22日，即國際生物多樣性日關(guān)注的焦點(diǎn)將是“生物多樣性與氣候變化”。

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.