SECONDARY WOODLAND
Secondary woodlands are those which have come into
existence since about 1600AD. Many have been planted by man, but
some have arisen naturally when land is abandoned and left to revert
to scrub and thence to woodland.
Although supporting fewer species
than ancient woodland, the secondary woods on the Cheshire Plain
are also of some nature conservation
value. These include game coverts and shelter belts as well as
those woods that have colonised former peatlands. Of the region's
four
great medieval hunting forests, Delamere and Macclesfield have
survived to the present day, although much modified and reduced in
size.
Broadleaved Woodland
Broadleaved woodland is vegetation
dominated by trees, forming a distinct, although sometimes open,
canopy containing less than
10%
conifers. The distribution of broadleaved woodland in Cheshire
becomes sparse in the higher ground of the Peak Park, in the
northwest urban
fringe of the county and in the lowlands of the Gowy and Dee.
Mixed Woodland
Mixed woodland has a distinctive
canopy with between 10% and 90% or broadleaved or coniferous trees.
Mixed
woodland is
well distributed
across Macclesfield district and becomes sparse in Warrington,
Halton and Ellesmere Port districts. Mixed woodland is
a priority for new
planting in the Mersey Forest area.
Coniferous Woodland
Coniferous woodland has a canopy containing less than 10%
cover of broadleaved trees and is predominately found
in the forests
of Delamere
and Macclesfield. Some planting of coniferous woodland
is undertaken as part of restoration schemes, particularly
in
the Delamere
area.
Scrub
Scrub is vegetation dominated by shrubs less than 5m
tall, with occasional scattered trees. The distribution
of sites
is relatively
even across
the region, except in the urban area of Halton where
scrub is sparse. Much of this habitat represents sites
which
are unmanaged
and in
the process of natural vegetation succession towards
broadleaved woodland.
Lowland Wood Pastures and
Parkland
The region is well supplied with parks of all ages,
ranging from medieval deer parks, such as Shotwick
Park, to the
great landscaped
parks of the 18th and 19th centuries, for example
Tatton Park. Although essentially designed landscapes, parklands
are often
important for
wildlife, containing ancient woodlands and meres
as
well as relic grasslands and heaths grazed by deer
or stock.
In addition,
their
veteran trees, often the most prominent surviving
features, are valuable for their associated lichen, fungi and
bryophyte flora
and deadwood
insects.
Parklands and wood pasture
may also preserve indigenous tree genotypes.
Much relict parkland remains in the Cheshire region
although this has largely been changed to agriculture
over time.
Lowland wood pastures and
parkland usually consist of large open-grown or high forest trees
at variable
densities,
in a matrix of grazed
grassland, heathland and/or woodland floras.
Tree management, usually by pollarding, has often helped
to produce
the characteristic veteran
trees, while grazing by domestic livestock, deer
or rabbits maintains the vegetation matrix.
These
habitats are particularly important for the fungi, lichens, bryophytes
and invertebrates
associated
with
veteran trees
and decaying timber. Indeed, according to the
UK Biodiversity Steering
Group Report
(1995) UK lowland wood pasture and parkland
provides the habitat for 38 species of conservation concern.
The fauna
of dead wood
(saproxylic species) is threatened throughout
Europe and Britain is important
for this fauna in a European context.
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