OPAL Air Survey Activity - Lichens

1088 lichen activity results uploaded so far!

Total number of lichen surveys uploaded per week

0

50

100

150

200

250

300

350

1 (14.09.09) week 2(21.09.09)

week 3(28.09.09)

week 4(05.10.09)

week 5(12.10.09)

week 6(20.10.09)

week 7(26.10.09)

Week of survey

Num

ber

of li

chen

res

ults

upl

oade

d

Launch of ‘live phase’ 29.09.09

OPAL Air Survey Activity - Lichens

Number of lichen surveys uploaded in each OPAL region (29.10.09)

0

50

100

150

200

250

300

350

400

OPAL region

Nu

mb

er

of

su

rve

ys

OPAL Air Survey Activity - Lichens

Are there ‘HOT SPOTS’ of N2-tolerant or N2-sensitive lichens ?

POLLUTION SCORE

NITROGEN

SENSITIVE

LICHENS

+1

INTERMEDIATE

LICHENS

0

NITROGEN

TOLERANT

LICHENS

-1

OPAL Air Survey Activity - Lichens

Regional lichen 'pollution scores' calculated from OPAL Air Survey results(01.09.09 - 06.10.09)

-15

-10

-5

0

5

10

15

20

OPAL region

Lic

he

n p

ollu

tio

n s

co

re

OPAL Air Survey Activity - Lichens

Below 10

10-20

23-30

30-40

40-50

50-60

Above 60

NO2NH3

Distribution of N2 sensitive lichensDistribution of N2 tolerant lichens

OPAL Air Survey Activity - Lichens

TRUNKS

TWIGS

OPAL Air Survey Activity - Lichens

TRUNKS TWIGS

NORTH WEST – Frequency of indicator lichens recorded on trunks and twigs

Usnea

Evernia

Hypogymnia

Melanelixia

Flavoparmelia

Parmelia

Leafy Xanthoria

Cushion Xanthoria

Physcia

-9 -2.5 -2 -8 -18 -11 -32.5 -5-18 -18.5

-36 -2 -28-2 -25

-6

Pollution scores per tree along a West – East transect through Greater London

OPAL Air Survey Activity - Lichens

Average frequency of lichens recorded ontwigs at site 3711

0

1

2

3

N loving Intermediate N sensitive

Indicator lichen category

Fre

quen

cy

Physcia

Cushion Xanthoria

Leafy Xanthoria

Parmelia

Flavoparmelia

Melaneilxia

Hypogymnia

Evernia

Usnea

Average frequency of indicator lichens recorded on tree trunks at site 3396

0

1

2

3

N loving Intermediate N sensitive

Indicator lichen category

Fre

quen

cy

Physcia

Cushion Xanthoria

Leafy Xanthoria

Parmelia

Flavoparmelia

Melaneilxia

Hypogymnia

Evernia

Usnea

Average frequency of indicator lichens recorded on twigs at site 3396

0

1

2

3

N loving Intermediate N sensitive

Indicator lichen category

Fre

quen

cy

Physcia

Cushion Xanthoria

Leafy Xanthoria

Parmelia

Flavoparmelia

Melaneilxia

Hypogymnia

Evernia

Usnea

Average frequency of indicator lichens recorded ontree trunks at site 3711

0

1

2

3

N loving Intermediate N sensitive

Indicator lichen category

Fre

quency

Physcia

Cushion Xanthoria

Leafy Xanthoria

Parmelia

Flavoparmelia

Melaneilxia

Hypogymnia

Evernia

Usnea

Average frequency of indicator lichens recorded on tree trunks at site 4112

0

1

2

3

N loving Intermediate N sensitive

Indicator lichen category

Fre

quen

cy

Physcia

Cushion Xanthoria

Leafy Xanthoria

Parmelia

Flavoparmelia

Melaneilxia

Hypogymnia

Evernia

Usnea

Average frequency of indicator lichens recorded on twigs at site 4112

0

1

2

3

N loving Intermediate N sensitive

Indicator lichen category

Fre

quen

cy

Physcia

Cushion Xanthoria

Leafy Xanthoria

Parmelia

Flavoparmelia

Melaneilxia

Hypogymnia

Evernia

Usnea

Average frequency of indicator lichens recorded on tree trunks at site 4090

0

1

2

3

N loving Intermediate N sensitive

Indicator lichen category

Fre

quen

cy

Physcia

Cushion Xanthoria

Leafy Xanthoria

Parmelia

Flavoparmelia

Melaneilxia

Hypogymnia

Evernia

Usnea

Average frequency of indicator lichens recorded on twigs at site 4090

0

1

2

3

N loving Intermediate N sensitive

Indicator lichen category

Fre

quen

cy

Physcia

Cushion Xanthoria

Leafy Xanthoria

Parmelia

Flavoparmelia

Melaneilxia

Hypogymnia

Evernia

Usnea

Average frequency of indicator lichens recorded on trunks at site 3256

0

1

2

3

N loving Intermediate N sensitive

Indicator lichen category

Fre

quen

cy

Physcia

Cushion Xanthoria

Leafy Xanthoria

Parmelia

Flavoparmelia

Melaneilxia

Hypogymnia

Evernia

Usnea

Average frequency of indicator lichens recorded on twigs at site 3256

0

1

2

3

N loving Intermediate N sensitive

Indicator lichen category

Fre

quen

cy

Physcia

Cushion Xanthoria

Leafy Xanthoria

Parmelia

Flavoparmelia

Melaneilxia

Hypogymnia

Evernia

Usnea

OPAL Air Survey Activity - Lichens

Percentage of tree trunks with/without epiphytic lichens in Greater London

No lichens

Indicator lichens only

Indicator + other lichens

Other lichens

Percentage of twigs with/without epiphytic lichens in Greater London

No lichens

Indicator lichens only

Indicator + other lichens

Other lichens