Article Figures & Data
Tables
- Table 1.
Community characteristic variable data for Illinois communities with municipal tree ordinances used in this study (n = 151).
Community characteristic variable Maximum Median Minimum Total population 2,783,726 15,319 313 Annual per-capita income $62,482 $15,715 $5,350 Average price of home $500,001 $98,800 $14,999 Residents living below federal poverty level 29.66% 2.10% 0.00% Unemployment 8.57% 2.00% 0.40% Education: HS diploma or below 63.67% 33.55% 5.85% Education: Some college or higher 73.87% 39.39% 12.40% Residents owning home within municipality 31.55% 23.80% 8.48% Single head of household 34.48% 17.75% 9.13% Age: < 25 61.75% 34.92% 21.72% Age: 25-65 60.33% 52.36% 30.74% Age: > 65 27.89% 12.38% 3.01% Race (% Caucasian) 100.00% 95.08% 1.05% Gender (% Male) 54.47% 48.26% 44.36% - Table 2.
Percentage of Illinois municipal tree ordinances that contain specific tree-related provisions.
Provision variable Abbreviation % contained in ordinances Requires property owners to care for trees in or invading right-of-way zones adjacent to their property DUTY 80% Guidelines regulating penalty fines for ordinance noncompliance PNTY 63% Requirements for abatement of diseased trees DISE 62% Guidelines regulating permits required for tree planting, maintenance, or removal PRMT 58% Authorization for public workers to enter private property for tree inspections, maintenance, or removal PRVT 57% Guidelines for enactment of a municipal tree board TRBD 56% Prohibits damaging actions or defacement of trees DAMG 50% Prohibits interference with tree care personnel INTR 48% Refers to a document outside the municipal code for tree Planting, maintenance, or removal specifications RFRA 42% Specifies minimum and/or maximum allowable distance between street trees SPAC 40% Specifies minimum and/or maximum allowable distance between street trees and intersections CURV 38% List of acceptable species for planting GDSP 34% Specifies minimum and/or maximum allowable distance between street trees and street curbs and/or sidewalks CURB 34% Guidelines regulating tree preservation PRSV 33% Guidelines specifying planting stock and/or planting technique PREQ 30% Planting and/or maintenance specifications for trees near utilities UTLY 29% Prohibition of topping TOPG 29% Authorization and guidelines for a community forestry education program EDUC 27% Requirement for utility companies to follow ordinance COMP 25% Guidelines for enactment of tree care personnel other than community arborist or forester OTHR 25% List of prohibited species for planting BDSP 24% Authorization for community to place lien on property for tree ordinance violations LIEN 24% Requires stump removal after felling of tree STMP 23% Requires tree care personnel to have an arborist license ARBL 18% Guidelines for enactment of a community arborist ARBT 15% Guidelines for enactment of a community forester FRST 9% Guidelines for emergency tree removal EMGY 8% - Table 3.
Correlations between community characteristics and municipal tree ordinance variablesz
Municipal tree ordinance provisionsy TRBD INTR STMP TOPG ARBL CURB UTLY PNTY PREQ OTHR FRST LIEN EMGY DISE DAMG PRSV PRMT Average price of home − − + + + + + + + Education: = Some college − + + + + + + + + Annual per-capita income − − − − + + + + + + Total population − − − − − − − − + + + Gender (male) − − − − − + − − − − − − + Age 25-65 − − − + − − − − − − + − Single head of household − − − − − − − − − − − − − − − − Race (Caucasian) + − + + + − − + − − − − − − Age > 65 + + + + + − − − − − − − − − Residents below poverty level + − + + + + − − − − − − − − Unemployment + + + + − − + − − − − − − − Education: = HS diploma + + + + + + + + − − − Ordinance provision Maximum Median Minimum Mode List of acceptable species for planting (# species) 103 28 6 21, 24, 32, 38z List of prohibited species for planting (# species) 40 10 2 12 Maximum allowable distance between trees (m) 22.9 15.2 9.1 15.2 Median allowable distance between trees (m) 18.3 12.2 8.4 12.2 Minimum allowable distance between trees (m) 18.3 9.1 4.6 9.1 Minimum allowable distance between street trees and intersection (m) 30.5 10.7 4.6 10.7 Maximum allowable distance between street trees and street curbs and/or sidewalks (m) 1.5 1.2 0.5 1.2 Median allowable distance between street trees and street curbs and/or sidewalks (m) 1.2 0.9 0.9 0.9 Minimum allowable distance between street trees and street curbs and/or sidewalks (m) 4.6 0.6 0.3 0.6 Maximum penalty fines for noncompliance $10,000 $500 $25 $500 Minimum penalty fines for noncompliance $1,000 $25 $1 $25 ↵zFour modes occurred between the range of 21 and 38.
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