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British NVC community CG7

From Wikipedia, the free encyclopedia

NVC community CG7 (Festuca ovina - Hieracium pilosella - Thymus praecox/pulegioides grassland) is one of the calcicolous grassland communities in the British National Vegetation Classification system. It is one of three short-sward communities associated with heavy grazing, within the lowland calcicolous grassland group, and is regarded as the eastern counterpart of "typical" chalk grassland (community CG2).

It is a comparatively widely distributed community. There are five subcommunities.

Community composition

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The following constant species are found in this community:

The following rare species are also associated with the community:

Distribution

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This community is found scattered throughout chalk grassland sites in southern England, particularly in The Brecks on the Norfolk/Suffolk border, with outlying clusters in the Yorkshire Wolds (also on chalk), and on Carboniferous limestone in Derbyshire and Mendip Hills.

Subcommunities

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There are five subcommunities:

  • the Koeleria macrantha subcommunity
  • the Cladonia spp. subcommunity
  • the Ditrichum flexicaule - Diploschistes scruposus var. bryophilus subcommunity
  • the Fragaria vesca - Erigeron acer subcommunity
  • the Medicago lupulina - Rumex acetosa subcommunity

References

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  • Rodwell, J. S. (1992) British Plant Communities Volume 3 - Grasslands and montane communities ISBN 0-521-39166-0 (hardback), ISBN 0-521-62719-2 (paperback)