The Various Challenges in Urban Ecosystem Research Heikki Setälä University of Helsinki Department of Ecological and Environmental Sciences.

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Presentation transcript:

The Various Challenges in Urban Ecosystem Research Heikki Setälä University of Helsinki Department of Ecological and Environmental Sciences

Hot future topic Climate change Increased temperature Pori, August milj. Euros Other negative consequences...

CITIES and global change Climate change - precipitation - temperature Land use change - urbanisationn - agriculture etc. Drastic Increase in sealed surfaces City floodsContamination of surface waters (= hulevedet) problems

1) Ecologists’s perspective  Problems with hydrological cycles

2) Ecologist’s perspective  Problems with Urban land use

Why to worry about impermeable, covered soils Soils are an essential FUNCTIONAL UNIT in all terrestrial ecosystems Ecoystem Services

ECOSYSTEM SERVICES - food - Water purification - Nutrient cycling - Detoxification - etc. ”Living soil””

Outcomes of urban land use Down-town Lahti: > million m 3 stormwaters to lake Vesijärvi 1

Outcomes of urban land use 2Reduced and fragmented urban green space Biodiversity aspects? Esthetical aspects? ELSE?

HOLISTIC view of urban systems: Urban ecosystem service network

Decisions/advice for City officials? More appreciation towards urban green areas ESPECIALLY To consider urban systems as ECOSYSTEMS with essential life-supprting services Sustainable future for cities and their inhabitants

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