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The Woodland Education Centre
The Heathland Restoration Project
Contents |

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Ecological Survey 1999
Spring Cut Sections (2, 4 and 7)
Summary
| (Please note, the colour coding given
to each section description matches that of the Belt Transect
Diagram to aid understanding.) |
Section 2
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Section 2 was dominated by grasses, particularly Yorkshire Fog and Common
Bent. The grasses tended to have very thick,
matted, tussocky bases which limited the growth of other ground cover plants such mosses.
The section contained small amounts of Bracken,
contrasting markedly with the autumn-cut strips on either side of it (1 and 3) which
contained quite large areas of Bracken. |
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Section 2 also contained woodrushes (left) and Yellow Pimpernel, together with some Greater Bird's-foot Trefoil. |
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Bell Heather was noted growing at the top of
Section 2. This was the first time it had been recorded in this section.
European, as well as some Western Gorse, a very
characteristic plant of heaths in the West of Britain, was also found in this section.
Western Gorse was generally rare across the project
site and was represented by only a few plants.
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Section 4
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Section 4 was similarly dominated by grasses, with Yorkshire Fog and
Common Bent occurring in virtually every single quadrat sampled. The grasses in section 4 also had thick matted bases and
hence there was very little in the way of mosses.
Sedges and in particular Wood Sedge, were
dominant in this strip. Compact Rush was also abundant in the lower half of the section (foreground - left). |
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Section 4 is a much larger strip than Section 2 and also tends to have a
slightly warmer, less shaded microclimate, because it is less influenced by adjacent
woodland. As a result this section contained a much greater range of species than Section
2. Brambles, Marsh Thistles and some European
Gorse were notable on this predominantly grassy area.
Foxgloves and Common Figwort (left) were also
relatively common in this section. |
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Several small isolated patches of Heather (left) and Bell
Heather were also noted in Section 4 for the first time. |
Section 7
(Spring cut plus initial grass and gorse control)
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Section 7 bore very little resemblance to the other 2 spring cut sections
previously described. This section was
dominated by low growing European Gorse and a mixture of sedges, particularly in the lower
half of the section.
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This section also contained the greatest concentration of Bell Heather
found on the project site, together with substantial amounts of Heather. (Both species are
visible in the foreground in the picture on the left.)
Tormentil, another heath species was also present.
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The top half of section 7 was more similar to the other spring cut
sections, although still substantially different. This half was dominated by a mixture of grasses (mainly Common Bent)
together with Heathers, Marsh Thistle, Wood Sage and large numbers of Silver Birch
seedlings. |
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This section had considerable moss ground cover, with an abundance of Polytrichum formosum
(left)
and Eurhynchium praelongum.
Hypnum jutlandicum, which is a characteristic heath species, also occurred in over a quarter of
the quadrats sampled.
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Dominant Plants in
Spring 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 2 |
Section 4 |
Section 7 |
| Overall
% frequency (mean % cover in brackets) |
1999 |
1998 |
1999 |
1998 |
1999 |
1998 |
| Yorkshire
Fog |
95 (46) |
90 (64) |
100 (54) |
100 (46) |
39 (6) |
48 (13) |
| Common
Bent |
85 (42) |
95 (34) |
94 (25) |
100 (35) |
74 (15) |
81 (30) |
| Bramble |
50 (6) |
52 (8) |
65 (8) |
50 (5) |
43 (7) |
24 (5) |
| Velvet
Bent |
50 (13) |
0 |
12 (3) |
0 |
0 (0) |
24 (2) |
| Eurhynchium praelongum |
50 (15) |
10 (2) |
12 (2) |
6 (0.5) |
74 (33) |
5 (0.5) |
| Polytrichum formosum |
50 (19) |
14 (4) |
24 (3) |
31 (14) |
70 (31) |
43 (24) |
| Thuidium
tamarascinum |
40 (15) |
5 (2) |
0 |
6 (1) |
52 (25) |
33 (9) |
| Atrichum
undulatum |
15 (2) |
0 |
12 (1) |
0 |
30 (3) |
0 |
| Hypnum
jutlandicum |
15 (7) |
5 (1) |
0 |
12 (2) |
26 (2) |
14 (1) |
| Common
Dog-violet |
35 (3) |
33 (2) |
76 (21) |
81 (17) |
43 (4) |
57 (5) |
| Pill
Sedge |
30 (5) |
24 (2) |
12 (1) |
6 (1) |
17 (2) |
33 (6) |
| Wood
Sage |
25 (3) |
33 (4) |
12(1) |
19 (3) |
+ |
0 |
| Wood Sedge |
0 |
0 |
53 (14) |
44 (5) |
0 |
5 (1) |
| Green-ribbed
Sedge |
0 |
24 (4) |
0 |
6 (1) |
35 (9) |
33 (5) |
| Smooth-stalked
Sedge |
15 (3) |
0 |
12 (2) |
0 |
48 (19) |
43 (11) |
| Heath
Woodrush |
15 (2) |
5 (0.5) |
6 (0.5) |
0 |
48 (10) |
29 (1) |
| Yellow
Pimpernel |
20 (4) |
14 (2) |
59 (9) |
56 (6) |
9 (1) |
10 (0.5) |
| Compact Rush |
15 (1) |
0 |
41 (4) |
31 (2) |
52 (5) |
38 (5) |
| Greater
Bird's-foot Trefoil |
+ |
5 (0.5) |
29 (2) |
38 (5) |
9 (0.5) |
5 (0.5) |
| Silver
Birch |
0 |
5 (0.3) |
18 (2) |
44 (3) |
52 (6) |
38 (5) |
| Cherry |
0 |
0 |
0 |
0 |
26 (5) |
14 (2) |
| European
Gorse |
10 (2) |
14 (2) |
6 (3) |
12 (2) |
74 (34) |
57 (14) |
| Bugle |
0 |
5 (0.2) |
59 (11) |
38 (8) |
4 (0.5) |
0 |
| Heather |
0 |
0 |
+ |
0 |
35 (9) |
14 (4) |
| Bell
Heather |
5 (2) |
0 |
+ |
0 |
39 (11) |
5 (0.5) |
| Heath
Speedwell |
0 |
5 (0.2) |
12 (2) |
19 (2) |
30 (3) |
33 (4) |
| Marsh
Bedstraw |
5 (0.2) |
0 |
24 (6) |
6 (0.2) |
0 |
0 |
| Marsh
Thistle |
0 |
0 |
24 (8) |
6 (1) |
+ |
5 (1) |
| 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:
A total of 29 plant species were dominant in one or
more of the spring cut sections.
Sections 2 and 4 were quite similar. They were
basically grassland habitats with a variety of small herbs and small amounts of bramble
and gorse. Section 7 was very dissimilar to the other two spring
cut sections. This section had less than half the grass cover of sections 2 and 4
(with the dominant grass species in all three strips being Yorkshire Fog and Common Bent).
Section 7 was instead dominated by heath species such as gorse, heathers and sedges. It
was one of the sections most resembling a heathland habitat in 1999 (along with sections 8
and 9).
Section 7 is 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. However, while there are undoubtedly some environmental differences between
section 7 and the other two spring cut sections, it is extremely unlikely that the
observed major vegetational differences are entirely due to environmental causes.

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Section
7: - Note the darker green of the gorse giving way to grass at the white post marked
boundaries with section 6 on the left and section 8 on the right. |
Section 7 is not only extremely
different to the other spring cut sections, but is also visibly entirely different to the
differently managed sections on either side of it which share similar environmental
conditions. The observed differences also exactly follow the white boundary markers all
the way up the section (see picture above). This clearly shows that the marked differences in vegetation in section 7 are
a direct result of the management regime applied to this section alone. The management of
section 7 has differed from the other two spring cut sections in only two respects: - the
initial control of regenerating gorse and grasses.
The vegetation regenerating on this section after
the second clearance of the entire project site was treated once with Garlon, which acts
against gorse and once with Kerb granules which specifically control grasses. Clearly, the
Garlon application had no lasting controlling effect on the gorse. Indeed, gorse was
dominant in this section within the first year (table).
The Garlon would presumably need to be applied more often than once, possibly at regular
intervals, in order to have a lasting controlling effect.
The greatest effect of the management in this
section seems to have been in restricting grass regeneration. Over most of the rest of the
project site, grasses were initially very dominant (table), outcompeting other herbaceous species. The restriction of initial grass
growth in this section seems to have been vitally important, allowing other species the
chance to become established to a point where they were then able to successfully compete
with the grasses.
The spring cut sections in more detail:
- Section 7 contained considerable quantities of ground
level mosses. Sections 2 and 4 had much less moss cover because the dominant grasses had
established dense, tussocky bases, allowing little room for moss establishment.
- Violets were common in the spring cut strips,
especially in section 4. The spring cut ensures that the dominant vegetation never grows
very tall over the summer so that the violets do not become shaded out.
- Although sections 2 and 4 were quite similar, there
were differences. These differences were most likely due to the fact that section 2 is a
very small, triangular section which is greatly dominated by adjacent woodland. Section 4
covers a much greater area than section 2 and so was also more diverse. Wood sedge was
common in section 4, but almost absent in the other spring cut sections. Section 4 also
contained considerable amounts of Bugle, in contrast to sections 2 and 7.
- Section 7 was much more influenced by tree seedlings
than the other two sections. Silver Birch occurred in 1 out of every 2 quadrats sampled in
section 7, but was not common in sections 2 and 4. Non-native cherry was found in section
7, but not in 2 and 4. This reflects the fact that section 7 is much closer to the wet
woodland, which was the original source of cherry seed.
- Spring cutting appears to be beneficial to the
establishment of heathers and other heath species on the project site. Section 7 had large
quantities of both Heather and Bell Heather and a third of the dominant species in all
three sections were species characteristic of heathlands.
Sections 1 - 4 form the southern area of the triangular heathland restoration area and are
quite different to the rest of the project site. All four strips are bounded by woodland,
with the increasingly tall control strip (section 5) to their north (site
description). These four sections therefore
have a very different microclimate and environmental conditions to the more northerly
sections 6 - 9. The conditions in this southerly area are so different that it was doubted
whether this part of the Heathland Restoration Project site would ever regenerate as
heathland. It is therefore notable that Heathers have now appeared in both spring cut
sections on this southern side of the project area, but not in the autumn cut strips.
The much lower height of the dominant vegetation over the summer growing season results in
less competition for light at ground level. This not only prevents smaller established
herbs, such as violets being shaded out, but also promotes seedling establishment
generally. The fact that a significant proportion of the dominant species on all three
sections are actually characteristic heath species is likely to be related to the soil
conditions. Presumably the acid, sandy, nutrient-poor soil is gradually favouring the
establishment of heathland species over other less well adapted grassland species.
Changes since the previous year:
- The amount of gorse increased in Section 7. There was
little change in sections 2 and 4. Western Gorse arrived in section 2.
- The amount of Heather and Bell Heather more than
doubled in section 7. Heather was noted in Section 4 for the first time and Bell Heather
for the first time in both 2 and 4.
- Bramble abundance increased in Section 7.
- Moss increased in all the spring cut sections.
The amount of Eurhynchium praelongum more than doubled in each section.
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