• No results found

The resilience of urban trees

N/A
N/A
Protected

Academic year: 2020

Share "The resilience of urban trees"

Copied!
17
0
0

Loading.... (view fulltext now)

Full text

(1)
(2)

N. J. Wallbank and P. James

(3)

Urban Trees

Climate regulation

Water regulation

Aesthetics

(4)

Future?

Resilience

“the speed and completeness of the

subsequent return to control levels”

(5)

Runcorn

N

(© Crown Copyright/database right 2010 An Ordnance Survey/EDINA supplied service)

(6)

Why Runcorn?

Large number of Trees

Integral Part of the Town

(7)

Climate Change

Time

Mean

Winter

Temp (

˚C)

Mean

Summer

Temp (

˚C)

Mean

Winter

Rainfall (%)

Mean

Summer

Rainfall (%)

2020s

+ 0.3 / + 2

+ 0.6 / + 2.5

- 4 / + 14

-

23 / +

10

2050s

+ 0.8 / + 3.3

+ 1.1 / + 4.7 - 1 / + 27

-

37 / + 8

2080s

+ 1.3 / + 4.8 + 1.3 / + 7.3

+ 3 / + 50

-

51 / +

3

(8)

Historical perspective

Higher in species-rich communities

(9)

Historical perspective

2050 Summer mean temperature central

estimate, High emissions

18.65 ºC

Summer mean precipitation

High emissions

134.9

mm

1976

15.79 ºC

&

91.5

mm

(10)

Traits

Number of Species

Drought resistant

9

Windfirm

19

Tolerates flooding

7

Frost resistant

21

27

Tree species have been recorded in Runcorn's Vegetation framework

(11)

Suitability Maps

1 km

N

Key

= Suitable

= Unsuitable

(12)

Suitability Maps

1 km

Silver birch (

Betula pendula)

2080

N

Key

= Suitable

(13)

ESC Results

Species

Suitable area

at present

(hectares)

Suitable area

from 2050-2080

(hectares)

Percentage

loss / gain

(%)

Silver birch

(

Betula pendula

)

28

5

- 81

Beech

(

Fagus sylvatica

)

14

3

- 79

Alder

(

Alnus glutinosa

)

14

5

- 64

Oak

(

Quercus robur

)

14

5

- 64

Poplar

(

Populus

sp.)

14

5

- 64

Wild cherry

(

Prunus avium

)

14

5

- 63

Scots pine

(

Pinus sylvestris

)

50

50

0

Sycamore

(

Acer pseudoplatanus

)

50

50

0

Ash (Fraxinus excelsior)

39

50

+ 22

(14)

Impacts

Alder

(

Alnus glutinosa

)

, Oak

(

Quercus robur

)

, Poplar

(

Populus

sp.)

,

Wild cherry

(

Prunus avium

)

, Silver birch

(

Betula pendula

)

and Beech

(

Fagus sylvatica

)

make up 40% of the tree cover in the framework

Species

Insects

Lichens

Oak

(

Quercus robur

)

284

324

Silver birch

(

Betula pendula

)

229

126

Alder

(

Alnus glutinosa

)

90

105

Beech

(

Fagus sylvatica

)

64

206

Ash (Fraxinus excelsior)

41

255

Sycamore

(

Acer pseudoplatanus

)

15

183

(15)

Conclusion

Only a small number of trees present in Runcorn

possess traits to cope with all climatic

circumstances

40% of the tree cover in Runcorn’s vegetation

framework is going to suffer with projected climate

change according to ESC

(16)

Analysis of management practices

Measurement of ecosystem services

Future management strategies for this

landscaping to circa 2060

(17)

The Resilience of Urban Trees

N. J. Wallbank and P. James

n.j.wallbank@edu.salford.ac.uk

Urban Nature website:

http://www.els.salford.ac.uk/urbannature

References:

Grime,J. P. 2001 Plant strategies, vegetation processes, and ecosystem properties/ 2nded. John

Wiley & Sons, ltd.

Rose F. and Harding, P.T. (1978) Pasture and woodlands in Lowland Britain and their importance for the conservation of the epiphytes and invertebrates associated with old trees. Nature Conservancy Council & The Institute of Terrestrial Ecology.

Southwood, T.R.E. (1961) The numbers of species of insect associated with various trees. J. Animal

References

Related documents

Such phones are available from Tracfone or Straight Talk or Net 10 but you need to know which phones will work on Verizon... First Step:

Most notably, a step change in the structure of the network is visible in Figure 8B between Pareto optimal solutions with index numbers 22 and 23, with most of the protected nodes

Thirdly, considering that the grounded data has indicated that the information requirement development category guides the data creation, data management and

In this pilot study, we present a prototype of an online diabetes exercise system designed to motivate people with Type 2 diabetes to do low volume HIT and we describe findings from

How the study was conducted The researchers used a 3-D global atmospheric download to predict how the radioactive material download move over earth and a health-effects model to see

Quality: We measure quality (Q in our formal model) by observing the average number of citations received by a scientist for all the papers he or she published in a given

In this study, it is aimed to develop the Science Education Peer Comparison Scale (SEPCS) in order to measure the comparison of Science Education students'

To achieve the load balancing we determine the sub-domains by using the Morton ordering so that the number of cells and the particle loads becomes uniform between processors as