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2014, br. 109, str. 97-112
Analiza indikatora aridnosti na području Deliblatske peščare
aUniverzitet u Beogradu, Šumarski fakultet
bRepublički zavodi, Republički hidrometeorološki zavod, Beograd
cnema
Ključne reči: Deliblatska peščara; indikatori aridnosti; degradacija zemljišta; šumski ekosistemi
Sažetak
Deliblatska peščara se nalazi u južnom delu Banata u Vojvodini. Prema procenjenim promenama osnovnih klimatskih parametara u ovom delu Republike Srbije tokom proteklih decenija registrovan je veoma izražen rast godišnjih temperatura vazduha (T), u proseku, 0,52°C po deceniji. Ovaj porast temperature povećao je potencijalnu evapotranspiraciju (PET), koja zajedno sa padavinama može povećati stepen aridnosti klime u istraživanom području.Međutim,u istom periodu zabeležen je porast godišnjih suma padavina (R), od u proseku oko 35 mm po deceniji, što može donekle usporiti aridizaciju peska u peščari. S obzirom na prirodu, poreklo i značaj ekosistema Deliblatske peščare, osnovni cilj ovog rada je da analizira sušu i indeks aridnosti (AI = P/PET), trend procesa aridizacije i njen mogući uticaj na ekosisteme ovog posebnog rezervata prirode. Analize indeksa aridnosti su izvršene u meteorološkim stanicama u Banatskom Karlovcu, Vršcu i Beloj Crkvi za period 1981 - 2010, uzimajući godišnje vrednosti za period vegetacije. Rezultati su pokazali da Deliblatska peščara (Banatski Karlovac) ima veću frekvenciju aridnih godina (AI < 0,65) u odnosu na lokalitete Vršac i Bela Crkva. Sa druge strane, nivo aridnosti se značajno povećao tokom vegetacionog perioda u peščari, kao i u njenoj okolini. Ova intenzivirana aridnost je rezultat značajnog povećanja potencijalne evapotranspiracije (PET) koja je povezana sa sezonskim padavinama.
Reference
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O članku

jezik rada: engleski
vrsta rada: izvorni naučni članak
DOI: 10.2298/gsf1409097k
objavljen u SCIndeksu: 13.05.2015.