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The positive correlation shows that the older the molehill the higher the species diversity index. This could be explained by the fact that when the moles first push up the soil it disturbs the plants
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INTRODUCTION Foulden common is covers a vast area both sides of the Oxborough to Foulden road and includes a variety of different habitats including young woodland, ponds, drainage channel, stream, reed swamp, surrounding farmland and grassland. The grassland is a predominantly alkaline area but in some locations it becomes neutral or even acidic. It has not been disturbed for many hundreds of years, though recently it has suffered due to the instability of the grazing regime. This habitat also contains a number of microhabitats; one of which is the molehill. Molehills are formed by moles who form complex burrow systems underground as they are predominantly subterranean creatures. They push the excess soil out of their burrow systems and this forms molehills above the ground. When these molehills are formed it inevitably disturbs many species of plants which were growing above the ground. The soil that is pushed upwards is generally well...
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