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The Woodland Education Centre |
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Ecological Survey 1999
Selected Heath Species
| Changes
in abundance of Heather 1998 - 1999. |
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Changes in abundance of Bell Heather |
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Changes in abundance of European Gorse |
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Changes in abundance of Bramble |
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Changes in abundance of Common Dog-violet |
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Changes in abundance of Heath Speedwell |
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Changes in abundance of Slender
St John's-wort |
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Changes in abundance of Silver Birch |
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Changes in abundance of Pill Sedge |
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| The
comparisons between sections have been made using % frequency (with data taken from
all the quadrats sampled, both belt and random) as a measure of abundance. Percentage frequency = the percentage of the total number of quadrats sampled which contained the species. For example, a percentage frequency of 100%, means that the species was found in all quadrats sampled. The % frequencies shown above are based on an average of 22 quadrats sampled per section. Differences of 10% frequency (which equates to a difference of approximately 2 quadrats) or less should not be regarded as significant.
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Ecological Survey 1999 |