Street trees in Bangalore: Density , diversity, composition and distribution

Nagendra, Harini and Gopal, Divya (2010) Street trees in Bangalore: Density , diversity, composition and distribution. Urban Forestry & UrbanGreening, 9 (2). pp. 129-137.

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Once renowned as India’s ‘‘gardencity’’, the fast growing southern Indian city of Bangalore is rapidly losing tree cover in public spaces including on roads. This study aims to study the distribution of street trees in Bangalore, to assess differences in tree density ,size and species composition across roads of different widths, and to investigate changes in planting practices overtime. A spatially stratified approach was used for sampling with 152transects of200m length distributed across wide roads (with awidthof24morgreater),mediumsizedroads(12–24m) and narrow roads(lessthan12m). We find thedensityofstreettrees inBangaloretobe lower thanmany otherAsiancities.Species diversity is high ,withthemostdominantspeciesaccountingforlessthan10%oftheoverallpopulation. Narrowroads,usuallyincongestedresidentialneighborhoods,havefewertrees,smallersizedtree species,andalowerspeciesdiversitycomparedtowideroads.Sincewideroadsarebeingfelledoftrees acrossthecityforroadwidening,thisimpliesthatBangalore’sstreettreepopulationisbeingselectively denudedofitslargesttrees.Oldertreeshaveamorediversedistributionwithseverallargesized species,whileyoungtreescomefromalessdiversespeciesset,largelydominatedbysmallstatured specieswithnarrowcanopies,whichhavealowercapacitytoabsorbatmosphericpollutants,mitigate urban heatislandeffects,stabilizesoil,preventgroundwaterrunoff,andsequestercarbon. This has serious implications for the city’s environmental and ecological health.These results highlighttheneed to protect large street trees on wide roads from treefelling, and to select an appropriate anddiversemix of largeandsmallsizedtreespeciesfornewplanting.

Item Type: Article
Additional Information: Copyright of this article belongs to Elsevier
Uncontrolled Keywords: Avenue trees Cities Green spaces India Urban biodiversity Urban ecology
Subjects: C Publications by ATREEians > G Journal Papers
Divisions: Publications by ATREEians > Journal Papers
Depositing User: Users 12 not found.
Date Deposited: 17 Feb 2014 10:56
Last Modified: 17 Feb 2014 10:56

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