Ekonomsko vrednotenje ekosistemskih storitev dreves v mestnem parku Maribor

Belcl, Gregor (avtor), Nastran, Mojca (mentor)

V današnji družbi vedno bolj prepoznavamo pomen ekosistemskih storitev (ES), ki jih drevesa nudijo v mestih. Vendar pa je ocenjevanje teh storitev pogosto zahtevno, še posebej, ko gre za ekonomsko vrednotenje dreves in njihovih funkcij. V delu obravnavamo ekonomsko vrednotenje ekosistemskih storitev dreves v Mestnem parku Maribor. V vzhodnem delu parka smo popisali 306 dreves, katerim smo določili drevesno vrst, izmerili premer, višino, lokacijo, ocenili zdravstveno stanje, stanje krošnje ter morebitne poškodbe. Podatke o 305 od 306 dreves smo vnesli v program i-Tree Eco, kjer smo pridobili vrednosti o strukturi posameznega drevesa (površina listov, velikost krošnje, temeljnico) ter izračune njihovih ekosistemskih storitev (sekvestracija in skladiščenje ogljika, čiščenje zraka, proizvodnja kisika, preprečen odtok deževnice, vpliv na stroške bližnjih stavb ter strošek nadomestitve drevesa). Najpogostejša drevesna vrsta je bil navadni divji kostanj (Aesculus hippocastanum L.), sledi metasekvoja (Metasequoia glyptostroboides Hu in Cheng) in navadni beli gaber (Carpinus betulus L.). Dve tretjini dreves v parku je tujerodnih drevesnih vrst. V splošnem so drevesa v dobrem zdravstvenem stanju. Poškodbe so bile najpogosteje na koreninskem sistemu, velik delež poškodb je bilo mehanskih. V analizi smo ugotovili, da drevesa v popisanem delu parka uskladiščijo 318 ton ogljika, kar ima monetarno vrednost 9.800 €. Letno sekvestrirajo 5 ton ogljika, kar predstavlja 157 €, očistijo 129,8 g onesnažil, kar predstavlja 259 €, zmanjšajo površinski odtok deževnice za 143 m3, kar predstavlja 75 € ter zmanjšajo stroške ogrevanja, kar je bilo ocenjeno na 265 €. Skupna vrednost za nadomestitev dreves, brez upoštevanja njihovih ES, znaša 1,47 milijona €. Skupna vrednost ES pa je približno 10.680 €. Skupna vrednost ES dreves v Mestnem parku Maribor kaže, da drevesa pomembno prispevajo k ekološki in ekonomski vrednosti parka, kar poudarja nujnost njihovega ohranjanja in skrbnega upravljanja.

• Jezik: Slovenski jezik
• Ključne besede: ekosistemske storitve, i-Tree Eco, park, mestna drevesa, ekonomsko vrednotenje
• Vrsta gradiva: Magistrsko delo/naloga
• Tipologija: 2.09 - Magistrsko delo
• Organizacija: BF - Biotehniška fakulteta
• Založnik: [G. Belcl]
• Leto izida: 2025
• PID: 20.500.12556/RUL-170186
• UDK: 630*90(497.412)(043.2)=163.6
• COBISS.SI-ID: 241268483
• Datum objave v RUL: 02.07.2025

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: Economic evaluation of ecosystem services of trees in Maribor City park

Izvleček

In today's society, we increasingly recognise the importance of the ecosystem services that trees provide in cities. However, valuing these services is often challenging, especially when it comes to the economic valuation of trees and their functions. In this paper, we focus on the economic valuation of ecosystem services provided by trees in the Maribor City Park. In the eastern part of the park, 306 trees were inventoried, for which we determined the tree species, measured diameter, height, location, assessed health status, canopy condition and potential damage. Data on 305 of the 306 trees were entered into the i-Tree Eco software to obtain values on the structure of each tree (leaf area, canopy size, basal area) and calculations of their ecosystem services (carbon sequestration and storage, air purification, oxygen production, prevented stormwater runoff, impact on the cost of nearby buildings, and the cost of replacing the tree). The most common tree species was the horse chestnut (Aesculus hippocastanum L.), followed by the metasequoia (Metasequoia glyptostroboides Hu and Cheng) and the hornbeam (Carpinus betulus L.).Two thirds of the trees in the park are non-native species. In general, the trees are in good health. Damage was most frequent in the root system, with a high proportion of mechanical damage. The analysis concluded that the trees in the inventoried part of the park sequester 318 tonnes of carbon, which has a monetary value of 9,800 €. Annually sequester 5 tonnes of carbon, representing 157 €, clean 129.8 g of pollutants, representing 259 €, reduce surface runoff of rainwater by 143 m3, representing 75 €, and reduce heating costs, which were estimated at 265 €. The total value of replacing the trees, not including their ecosystem services, amounts to 1.47 million €. The total value of the ecosystem services is approximately 10,680 €. The total ecosystem services value of the trees in city park Maribor shows that trees contribute significantly to the ecological and economic value of the park, which underlines the need for their conservation and careful management.

• Ključne besede: ecosystem services, i-Tree Eco, park, urban trees, economic evaluation