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The Woodland Education Centre
The Heathland Restoration Project
Contents |

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Ecological Survey 1999
Autumn Cut Sections (1, 3 and 8)
Summary
| (Please note, the colour coding given
to each section description matches that of the Belt Transect
Diagram to aid understanding.) |
Section 1
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Section 1 is the smallest of the Heathland Restoration Project sections.
It is a triangular area dominated by adjacent woodland. It therefore has a much cooler,
shadier microclimate than the other sections. The
ground layer in this area was characterised by the build up of considerable quantities of
leaf litter from the surrounding trees. |
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The plant cover in section 1 was dominated by grasses, particularly Yorkshire
Fog (left)
and Common Bent. Some Sweet Vernal
Grass also occurred in this section, as well as in sections 3 and 8. This is one of
the earliest grasses to flower, flowering as early as April. By the time the annual survey
was carried out in July, much of this grass had died back and it was not picked up in the
quadrats.
A variety of mosses were also interwoven
amongst the base of the grasses, particularly Eurhynchium
praelongum. |
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The lower part of the section contained a stand of Bracken. |
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Bluebells were a very dominant species on this section in the spring.
However, by the time the survey was carried out in July, the Bluebells had largely died
back, so their real dominance in the section is not truly reflected in the quadrat data. Bluebells are a remnant woodland species. The woodland on the
northern border of the project site is famous locally for its massed stands of Bluebells.
Narrow Buckler Fern, another characteristic woodland
species, occurred in over a quarter of the quadrats sampled. |
Section 3
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Section 3 was similarly dominated by the grasses Yorkshire Fog and Common
Bent. Some Wood Sedge was also present in
this section, although much less than was present in the neighbouring spring cut section
4.
There was some bracken in the lower part of
the section (left foreground). |
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A significant amount of False Oat Grass (left) occurred in the lower half of the section, although this again was not
reflected in the quadrats. This grass
has tall, slightly drooping flower heads. It is a much taller grass than the others on the
section and therefore stands out.
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Bluebells were also one of the dominant species in section 3. |
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Section 3 is a much larger section than section 1 and more resembles a
meadow habitat with a variety of herbs mixed in amongst the grass sward. Greater Bird's-foot Trefoil (left), Yellow
Pimpernel and violets occurred in significant amounts in the lower half of this section.
These species were either absent or rare in section
1. |
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Section 3 also contained a variety of taller herbs such as Hemp-agrimony (left), Hedge
Woundwort, Wood Sage, Common Figwort and Marsh Thistles.
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Section 8
(Autumn cut plus initial general 'weed' control)
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Section 8 appeared to be a predominantly grassland habitat on first
observation. However, this was somewhat deceptive and on closer examination, this section
was very noticeably stratified into vertical layers. There was a well established ground layer of mosses, with a taller shrubby
layer of Heather over this, all overtopped by tall, waving flowering grasses. When
examined superficially, the grasses were therefore the major vegetation visible. |
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This section contained substantial amounts of Heather, but much less Bell
Heather than in adjacent spring cut section 7.
Along with sections 7 and 9, this section most
resembled a heathland habitat.
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A few plants of Bristle Bent
(left), which is a heathland grass, had colonized this section. This grass gets its name from the very narrow bristle-like
leaves.
It grows in distinct clumps rather than creeping and
covering large areas. |
Dominant Plants in
Autumn Cut Sections in 1999
with figures from 1998 for comparison.
Characteristic heath species
are in bold print
A + sign indicates the species was present, but not recorded in the quadrats.
| Species |
Section 1 |
Section 3 |
Section 8 |
| Overall
% frequency (mean % cover in brackets) |
1999 |
1998 |
1999 |
1998 |
1999 |
1998 |
| Yorkshire
Fog |
100 (31) |
90 (44) |
100 (32) |
100 (60) |
67 (17) |
82 (25) |
| Common
Bent |
95 (56) |
95 (51) |
94 (43) |
90 (23) |
83 (9) |
82 (21) |
| Eurhynchium praelongum |
81 (43) |
10 (2) |
65 (19) |
10 (3) |
72 (33) |
12 (1) |
| Bramble |
76 (14) |
57 (9) |
65 (20) |
75 (13) |
33 (4) |
41 (6) |
| Bluebell |
71 (17) |
67 (4) |
60 (8) |
85 (8) |
+ |
+ |
| Thuidium
tamarascinum |
67 (17) |
14 (6) |
30 (10) |
5 (0.5) |
78 (24) |
35 (11) |
| Polytrichum formosum |
29 (6) |
14 (1) |
5 (0.1) |
10 (6) |
67 (45) |
53 (14) |
| Narrow
Buckler Fern |
29 (4) |
0 |
5 (3) |
0 |
0 |
0 |
| Silver
Birch |
19 (2) |
24 (2) |
10 (2) |
15 (4) |
33 (8) |
41 (5) |
| Heath
Woodrush |
14 (2) |
14 (2) |
10 (2) |
5 (0.5) |
33 (4) |
24 (3) |
| Velvet
Bent |
10 (3) |
5 (0.5) |
50 (14) |
10 (1) |
39 (6) |
0 |
| Hypnum
jutlandicum |
5 (0.2) |
0 |
0 |
15 (2) |
39 (8) |
24 (8) |
| Common
Dog-violet |
5 (0.4) |
0 |
65 (24) |
70 (12) |
28 (3) |
47 (4) |
| Wood Sedge |
5 (1) |
0 |
20 (6) |
20 () |
11 (2) |
0 |
| Smooth-stalked
Sedge |
5 (0.4) |
10 (2) |
0 |
0 |
50 (5) |
12 (4) |
| Yellow
Pimpernel |
5 (0.5) |
0 |
40 (4) |
25 (3) |
17 (0.5) |
12 (1) |
| Greater
Bird's-foot Trefoil |
0 |
0 |
45 (12) |
20 (4) |
0 |
0 |
| European
Gorse |
0 |
5 (0.5) |
10 (5) |
20 (3) |
72 (25) |
53 (12) |
| Heather |
0 |
0 |
0 |
0 |
61 (19) |
18 (3) |
| Slender St. John's-wort |
0 |
5 (0.1) |
20 (1) |
25 (2) |
61 (5) |
53 (6) |
| Percentage
frequency = the percentage of the total number of quadrats sampled over the whole site
which contain the species. For example, a percentage frequency of 100%, means that the
species was found in all quadrats sampled. |
| Summary: Comparison between the sections:
All three autumn cut sections were dominated by
grasses, although section 8 was considerably different to sections 1 and 3, having an
abundance of more typical heath species such as Heather, gorse and Slender St John's-wort,
as well as the grasses.
The management in section 8 has differed from that
in sections 1 and 3 in only one respect: - species viewed as being undesirable to
heathland regeneration in section 8 were spot treated once with 'Roundup', a biodegradable
herbicide, in the early stages of the project. This may be responsible for some of the
observed differences between section 8 and the other two autumn cut sections.
Section 8 is also in the northern half of the
Heathland Restoration Project area. This half of the site is much more open, less
dominated by woodland and has a much warmer microclimate than sections 1 - 4 in the
southern half of the project site. It is likely that these environmental differences are
favouring the development of more typical heath species in the northern half of the
project site.
Environmental differences between section 8 and
sections 1 and 3 are also reflected in the fact that sections 1 and 3 were dominated by
Bluebells in the spring, while Bluebells were only present in isolated patches in section
8.
All three sections had considerable stands of
bracken, although as this tended to be clumped together in the lower halves of the
sections, its extent was often not reflected in the quadrat data.
The autumn cut sections in more detail:
- Yorkshire Fog and Common Bent were the dominant
grasses in all three sections. Sweet Vernal Grass, a characteristic heathland grass, was
present in all three sections and Bristle Bent, another very characteristic heath species,
was present in section 8.
- Mosses formed a dominant part of the ground layer in
all three sections.
- Section 1, which is the section most dominated by
woodland, had notable quantities of ferns.
- Section 3 contained a variety of low herbs mixed in
among the grasses, including violets, Yellow Pimpernel and Greater Bird's-foot Trefoil.
The two latter species are characteristic of damp habitats.
- Section 8 contained considerable quantities of
Heather, gorse and Slender St John's-wort, all characteristic heath species.
Changes since the previous year:
- The amount of heather increased three-fold in section
8.
- Grass cover decreased in section 8.
- The moss Eurhynchium praelongum increased more than 6
fold in all three sections. This species is normally abundant in woods and hedgerows, but
occurs across a wide range of habitats, including fields and marshes. It is a particularly
shade tolerant species. This is an important feature which has allowed this moss to become
dominant in the ground layer, despite being shaded by much taller vegetation for much of
the year.
- The amount of Thuidium tamarascinum
also more than doubled in all three sections. This moss is more often found in woods and
on hedgebanks, but it will also grow with other mosses amongst grass in open situations,
as on the Heathland Restoration Project site.
- Greater Birds-foot Trefoil more than doubled in
section 3.
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