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Presentation by Dr Edward Tripp on what soils tell us about heathland
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The Dirt CollectorWhat do soils tell us about
heathlands?
Dr Edward J Tripp Community Scientist – OPAL East Midlands
State of Heathland
• Within Nottinghamshire, heathland loss > 85% between 1927 and 1970
• Size of patches decreased, fragmentation increased
• Land use change (agriculture or urbanisation), succession into grassland, woodland or scrub
Nitrogen Pollution
• Sulphur dioxide pollution no longer problematic
• Nitrogen pollution increased over the last century
• Nitrate, ammonium, nitric acid, ammonia, nitrogen oxides
• Soil acidity• Biomass burning and
agriculture
The Project
Aims
How has nitrogen pollution affected heathlands in the East Midlands
Impact of FragmentationManagement
Heathland Sites
• 25 sites across the British Mainland
• 11 sites in the East Midlands
• 14 sites in the rest of the UK
Nitrogen Deposition
The studies
• Soil fertility
• Ammonia
• Management
Soil Fertility
• Soils collected from the 25 heathland sites
• Bioassayed in a controlled growth room
• Weight, shoot nitrogen and shoot phosphorus uptake determined
NW (kg N ha-1 yr-1)
0 2 4 6 8 10 12 14
Cal
luna
vul
garis
dry
-mas
s (m
g)
1
2
5
10
50
100
150r2 = 0.219 P = 0.016
Heather Growth
NW (kg N ha-1 yr-1)
0 2 4 6 8 10 12 14
Ave
rag
e t
ota
l N u
pta
ke (
g)
10
50
100
500
1000
2000
3000
5000
NW (kg N ha-1 yr-1)
0 2 4 6 8 10 12 14
Tota
l ave
rage
P u
pta
ke (
g)
1
2
5
10
50
100
200
300
500
r2 = 0.285 P = 0.005 r2 = 0.256 P = 0.009
Nitrogen and phosphorus shoot uptake
Shoot N:P
NW (kg N ha-1 y-1)
0 2 4 6 8 10 12
N:P
in C
allu
na v
ulga
ris d
ry-m
ass
10
15
20
25
30
35
12
3
4
5
8
9
10
11
7
6
13
12
15
14
1617
18
23
24
2021
22
19
25
26
12
3
4
5
8
9
10
11
7
6
13
12
15
14
1617
18
23
24
2021
22
19
25
26
r2 = <0.01, P = 0.805
N limitation
P limitation
Ammonia
Ammonia
[NH3] Concentration (g m3)
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
Res
idua
l var
iatio
n in
SW
(m
g)
-4
-3
-2
-1
0
1
2
9
10
12
1314
15
16
17
19
20
21
Heathland Site Area
Site Area (ha)
1 10 50 5001000
30006000
Cal
luna
vul
garis
dry
-mas
s (m
g)
1
2
5
10
50
100
150
r2 = 0.169 P = 0.037
Management
• No indications that vegetation composition is related to nitrogen pollution.
• Is management the reason?
Management
NW (kg N ha-1 yr-1)
0 2 4 6 8 10 12 14
Cal
luna
vul
garis
dry
-mas
s (m
g)
1
2
5
10
50
100
150
Similar management
Impact of sod cutting
Conclusions
• Heathland loss due to land-use change and succession
• Soil fertility linked to atmospheric nitrogen deposition. Vegetation composition is not.
• N impact modified by PME activity, management and patch size
Dr Peter Crittenden
Dr Amy Rogers
Dr Markus Eichhorn
Protecting Wildlife for the Future
Edward TrippSherwood Education & Communication Officer
Karen BennettEducation Manager
Nottinghamshire Wildlife Trust
Sherwood’s Historic Heathlands
Protecting Wildlife for the Future
Nottinghamshire Wildlife Trust
Sherwood’s Historic Heathlands Project• The west of the county – mainly Mansfield
and Ashfield• Raise awareness of the value of
heathlands and how to protect them
• School and community groups• Primarily 8 – 18 year olds• FREE sessions and activities
• Runs until May 2014
Protecting Wildlife for the Future
Nottinghamshire Wildlife Trust
Sherwood’s Historic Heathlands Project• Restoration of Strawberry Hill Heath Reserve• Removal of trees and bracken to allow
heather to grow• Improving access and interpretation
Young Persons Committee• Investment in protecting local heathlands• Involvement in project steering• Project legacy
Protecting Wildlife for the Future
Nottinghamshire Wildlife Trust
Meet The Team
Ed TrippSherwood Education
& Community Officer
Karen BennettEducation & Community
Manager
Ruth TestaWestern Reserves
Officer
Andy LoweWestern
ConservationOfficer