Evidence details

rebecca.killalea@canberra.edu.au on 02 Mar 2022
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Study

Citation
Nidzgorski, D. A., & Hobbie, S. E. (2016). Urban trees reduce nutrient leaching to groundwater. Ecological Applications.
Study description
This study investigated the leaching of nutrients under trees and turfgrass. The study assessed the effectiveness of urban trees to reduce nutrient leaching and therefore reduce the nutrients reaching groundwater and downstream waterbodies.

Response

Cause term/trajectory
Habitat (physical characteristics)
Cause description
Urban trees in landscape compared with turfgrass
Effect term/trajectory
Sediment quality - nutrients (phosphorus) (Decrease)
Effect description
Urban trees were found to have lower soil water phosphorus concentrations than open turfgrass areas. Deciduous trees had the lowest phosphorus concentrations, followed by evergreens and then turfgrass.
Response measure type
Other
Response measure description
Response measure: quantile regression.

Design

Source data
Field
Study type
Observation
Study design
Temporal gradient
Number of independent control or reference sampling units
33
Sample size used in analysis
varied between sites
Design description
3 vegetation types assessed: turfgrass (7 sites), deciduous trees (23 sites), evergreen trees (10 sites) - each were sampled biweekly between July 2011 and October 2013 when soil was wet enough. This resulted in varied sample sizes between vegetation types.

Context

Climate
Cold (continental)
Country
United States
Habitat
Other
Spatial extent
Other
Temporal extent
Years
Context description
Habitat: three parks across an urban area.