Jasiiradda kulaylka magaalada, Zippy Red Oaks
Waxaa qoray DOUGLAS M. MAIN
The New York Times, Abriil 25, 2012
Geedo geedeedka cas ee ku yaal Central Park waxay koraan ilaa sideed jeer ka dhakhso badan ilma adeerkood oo lagu beeray meel ka baxsan magaalada, malaha sababtoo ah saamaynta "jasiiradda kulaylka" ee magaalada, Cilmi-baarayaasha Jaamacadda Columbia ayaa ka warbixiyay.
Cilmi-baadhayaashu waxay beerteen geedo geedkii casaanka ahaa gugii 2007 iyo 2008 afar meelood: waqooyi bari ee Central Park, oo u dhow 105th Street; Laba dhul kayn ah oo ku yaal agagaarka dooxada Hudson; iyo meel u dhow kaydka Ashokan ee magaalada ee ku yaal buuraha Catskill oo qiyaastii 100 mayl waqooyi ka xiga Manhattan. Dhammaadkii xagaaga kasta, geedaha magaaladu waxay saareen bayoolaj siddeed jeer ka badan kuwa lagu koray meel ka baxsan magaalada, sida laga soo xigtay daraasaddooda, oo lagu daabacay joornaalka Tree Physiology.
"Geedo ayaa aad ugu koray magaalada, iyadoo korriinka uu sii yaraanayo markaad ka sii fogaato magaalada," ayuu yiri qoraaga hogaanka u ah cilmi-baarista, Stephanie Searle, oo ka mid ah jaamacadda Columbia markii cilmi-baaristu bilaabantay oo hadda ah cilmi-baare siyaasadda biofuels at the Golaha Caalamiga ah ee Gaadiidka Nadiif ah ee Washington.
Cilmi-baadhayaashu waxay qiyaaseen in heerkulka kuleylka Manhattan - ilaa siddeed darajo ka sarreeya habeenkii marka loo eego hareeraha miyiga - ay noqon karto sababta asaasiga ah ee heerarka kobaca degdega ah ee Park Park oaks.
Haddana heerkulku sida cad waa mid ka mid ah faraqa u dhexeeya miyiga iyo magaalooyinka. Si loo go'doomiyo doorka heerkulbeegga, cilmi-baarayaashu waxay sidoo kale kor u qaadeen geedaha geedka ee goobta shaybaarka halkaas oo dhammaan shuruudaha ay asal ahaan isku mid yihiin, marka laga reebo heerkulka, kaas oo loo beddelay si loogu ekaysiiyo xaaladaha goobaha kala duwan. Hubaal ku filan, waxay arkeen heerarka kobaca degdega ah ee geedaha kor loo qaado xaaladaha kulul, oo la mid ah kuwa lagu arkay beerta, Dr. Searle ayaa yidhi.
Saamaynta jasiiradda kulaylka ee loogu yeero magaalada waxaa inta badan laga hadlaa marka la eego cawaaqib xumada suurtagalka ah. Laakiin daraasaddu waxay soo jeedinaysaa inay faa'iido u yeelan karto noocyada qaarkood. "Noolaha qaar ayaa laga yaabaa inay ku koraan xaaladaha magaalada," qoraa kale, Kevin Griffin, oo ah cilmi-nafsiga geedka ee Lamont-Doherty Earth Observatory ee Columbia, ayaa ku yiri hadal uu soo saaray.
Natiijooyinka waxay barbar socdaan kuwa a 2003 daraasad ku saabsan Nature taas oo heshay heerar korriin oo ka weyn geedaha poplar ee ku koray magaalada marka loo eego kuwa ka baxa baadiyaha ku hareeraysan. Laakiin daraasadda hadda jirta ayaa aad uga sii fogaatay iyada oo go'doominaysa saamaynta heerkulka, Dr. Searle ayaa yidhi.
Geedaha gaduudan iyo qaraabadooda ayaa maamula kaymo badan laga bilaabo Virginia ilaa koonfurta New England. Waayo-aragnimada geedaha cas ee Central Park waxay keeni kartaa tilmaamo ku saabsan waxa ka dhici kara kaymaha meelo kale iyadoo heerkulku kor u kacayo tobanaan sano ee soo socda ee isbedelka cimilada, cilmi-baarayaashu waxay soo jeediyeen.