updating your tree inventory

Updating Your Tree InventoryIOWA SHADE TREE SHORT COURSEFEBRUARY 21-23, 2017

Agenda• Why• How• Results

ISA PledgeI pledge as an ISA Certified Arborist to:• Adhere to the Code of Ethics,• Comply with all accepted

professional standards,• Deliver safe & competent services

with objective & independent professional judgment,• Disclose potential conflict of

interest, and• Follow appropriate health & safety

procedures to protect clients, employers, employees, and the public.

What’s Happening? Our urban forests are threatened by: exotic and invasive insects and diseasesBudgetsConstructionWeather patterns/eventsPolicyEtc…..

How can we best manage sustainably?

Where to Start???

??

?

?? ?

? ??

?Public Tree Inventories

Management Plans

Urban Tree Canopy Analysis

Tree Ordinances

Hyperspectral Imagery

i-Tree Benefits Model

Should the Foundation of Your Urban Forest Program be Built by the Lowest Bidder?

Why?• Increased Public Safety• Increased Efficiency• Justify Budgets• Documentation• Planning

– Short-term– Long-term

Typical Tree Inventory Data Fields

• GIS/GPS• Location (Area) • Identification• Diameter (DBH)• Condition• Maintenance

Recommendation• Conflicts

Public Tree Inventory

How – ConsiderationsNew Vs. Update

–Goals–How accurate • (addressing)

–GIS data–Work histories

Ongoing

Ongoing

Ongoing – Archive History

New

Save Work History

Results – Bellefontaine Cemetery

2007 – 5,272 trees2014 – 6,141 trees

Results – Bellefontaine Cemetery

2007 – 5,272 trees2014 – 6,141 trees

Results – Bellefontaine Cemetery

2007 – 5,272 trees2014 – 6,141 trees

Results – Bellefontaine Cemetery

Results – Bellefontaine Cemetery

Update

Update

Update

Results - Buffalo

Results - Buffalo2001 2014 Difference

Sites 124,445 127,080 2,635Total DBH 871,173” 817,627” -53,546”Average DBH

7” 6” -1”

# Species 281 247 -34# Removals

668 2,707 2,039

# Planting Sites

48,761 44,619 -4,142

Relative Performance

MAPLE, NORWAY

LINDEN, LITTLELEAF

MAPLE, SILVER

MAPLE, HEDGE

MAPLE, RED

MAPLE, CRIMSON KING

LILAC, IVORY SILK

MAPLE, DEBORAH SCHWEDLER

CRABAPPLE

HONEYLOCUST

LINDEN, CRIMEAN

PEAR, CALLERY

HORSECHESTNUT, COMMON

LONDON PLANETREE

0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000

Condition Species with at least 1,000 trees

Dead Fair Good Other Poor

21%11%20%13%37%26%14%50%12

%20%24

% 3%13%9%

Results - Buffalo

ASH SPECIES

PINE, SPECIES

BIRCH, ASIAN WHITE

ASH, BLUE

COTTONWOOD, EASTERN

POPLAR, WHITE

POPLAR, SPECIES

WILLOW, WEEPING

FIR, WHITE

EMPRESS TREE

MAPLE, BOXELDER

VIBURNUM SPECIES

BIRCH, EUROPEAN

BEECH, PURPLE LEAF

0.00 2.00 4.00 6.00 8.00 10.00 12.00

Average of Growth

DBH

Top 10 Species Still Recommended for Removal (315)

MAPLE

, NORWAY

LINDEN, L

ITTLE

LEAF

MAPLE

, SILV

ER

ELM, S

COTC

H

LILAC,

IVORY

SILK

HORSECH

ESTNUT,

COMMON

CHERR

Y, KWANZA

N

CRAB

APPLE

MAPLE

, SUGAR

MAPLE

, SYC

AMORE 'SP

AETHII'

0

10

20

30

40

50

60

70

80

Num

ber o

f Tre

es

Top 5 Species Still Poor Recommended for Removal

45; 43%

24; 23%

20; 19%

9; 9%6; 6%

MAPLE, NORWAYMAPLE, SILVERLINDEN, LITTLELEAFHORSECHESTNUT, COMMONCHERRY, KWANZAN

162 total trees

Poor Condition Performance2001 – 5,698 Trees

Updated Condition

Number of Trees

Dead 3Poor 145Fair 11Good 0Plant 293

Fair Condition Performance2001 – 38,199 Trees

Updated Condition

Number of Trees

Dead 298Poor 3,445Fair 26,830Good 962Plant 1,365

Good Condition Performance2001 – 25,632 Trees

Updated Condition

Number of Trees

Dead 259Poor 717Fair 8,952Good 9,783Plant 1,878

Growspace Performance

Growspace Growth # of Trees

< 4' 20,354” 26,071

4'-6' 38,955” 35,191

> 6' 61,438” 47,722

Planting Sites2001• 52,933 total vacant sites• 48,761 “real” planting sites

2014• 44,619 available planting sites• 4,142 planted trees

Conclusions• Know why you want an update?

– New vs update• Opportunity for data analysis

– Species performance• Growspace• Condition• Growth rate• Maintenance

• Costs• Frequency

Thanks!Josh BehounekJosh.Behounek@davey.com573-673-7530@treesrtheanswr