Extent/Distribution
Hedgerows form a significant and characteristic
part of the Gloucestershire landscape. However, relatively little is known
of the actual extent and distribution of ancient and species rich hedgerows
throughout the county. Currently there is no countywide data on the status
of Gloucestershire's hedgerow resource. It has been estimated that in
1977 there were over 10,000 km (an average of 5 km of hedge per km 2 )
of hedgerows in the county (Wildlife in Gloucestershire; A Habitat Survey.
GTNC).
Although most of the county's hedges date from the major periods of parliamentary
enclosure, certain hedgerows are very old, in particular some that form
parish boundaries have been shown to date from the 9 th and 13 th Centuries.
Nationally it has been estimated that approximately 42% of hedges are
species rich (UKBAP). Assuming this figure can be applied to Gloucestershire
we can surmise that the county might hold around 4000 km of species rich
hedgerows.
Threats
Since 1945 there has been a drastic loss of hedgerows through removal
and neglect throughout the UK. Removal is now a much less significant
threat, however neglect of hedgerows is becoming an increasingly important
factor.
Neglect (no cutting, coppicing or laying)
- Neglect leading to hedgerows changing into lines of trees and the
development of gaps. This reflects the modern high labour costs and
the lack of traditional skills.
- Poor laying and coppicing in some instances may be more damaging
than none at all.
- Invasive weed species such as (elder/clematis) can take over some
hedges. This may make management more difficult (requiring manual
intervention) and in the long-term make management unviable resulting
in neglect.
- Hedges conveyed jointly to domestic householders on new housing
developments can lead to difficulties over responsibility for management
and the understanding of the need for management and retention.
Inappropriate management
- Too frequent cutting can damage hedges and lead to the development
of gaps and changes in species composition. Flailing, for example,
can damage hedgerow trees and, if used on older growth, can weaken
hedges and make them prone to disease.
- Since most trees and shrubs in hedges only produce flowers, nuts
and berries on the previous years growth, cutting hedges every year
removes this valuable resource and is therefore bad for wildlife.
Cutting before January or February removes this resource for birds
and mammals.
- Mechanical erosion/overcutting of hedge base through cultivation
can expose roots and leave the hedge open to disease. This is especially
a problem in arable fields converted from pasture where the hedge
roots have not adapted to cultivation.
- Use of inappropriate planting stock, such as species which are
not of local provenance, may reduce the local character of hedges.
- The dumping of materials in hedgerow bases, such as chippings and
grass cuttings could have a damaging effect on the ground flora associated
with many species rich and ancient hedgerows.
Loss of hedgerow trees
- Surveys show that nationwide hedgerow tree numbers are declining
and that there is a shortage of younger age classes. There is a need
for continual new planting to counter loss through senescence. There
is generally no replanting of standard trees, or singling out saplings
to grow on, currently occurring, they are not adequately covered by
farm management plans. Old trees also provide an important habitat
for invertebrates. Dutch Elm Disease has been a significant factor
in the loss of many hedgerow trees.
Pesticide, herbicide and fertiliser applications
- The use of pesticides and fertilisers right up to the base of hedgerows
leads to nutrient enrichment and reduces species diversity. More widespread
use of margins and headlands would reduce this problem.
High stocking rates
High stocking rates particularly of sheep, lead to hedgerow damage and
the subsequent need to fence fields. The presence of fences reduces
the agricultural necessity for hedge maintenance and so hastens their
decline.
Removal
For agriculture: If a hedge is not classed as ‘important’
under the Hedgerows Regulations it can be removed for agricultural purposes.
Where a hedgerow is removed to enable the implementation of a detailed
planning consent, the normal hedgerow regulations procedure does not
apply. Local Planning Authorities should ensure that the character and
quality of hedgerows are taken into account as a material consideration
of such applications.
Action
Plan Objectives
- To gain a better understanding of Gloucestershire’s resource
of species rich and ancient hedges
- To maintain existing species rich and ancient hedges
- To enhance and restore degraded species rich and ancient hedges
- To enhance links between existing species rich and ancient hedges
and between other priority habitats, through targeted planting
- Maintain overall numbers of hedgerows trees within each district
at at least current levels through ensuring a balanced age structure
- To raise awareness and understanding of the biodiversity value of
species rich and ancient hedges.
Action
Plan Targets
- Gloucestershire's hedgerows surveyed by 2005
- Gloucestershire's hedgerows surveyed by 2005
- Achieve the favourable management of 25% of
species rich and ancient hedges by the year 2005, and 50% by 2010.
- 25 km of new hedgerows by 2010, (plantings
both through and outside of various grant schemes available)
Current
Action
{Current action}
Proposed
Action
Policy and legislation
{policy} Management
{Management} Research and monitoring
{Research} Education and awareness
raising
{Education}
Progress
{Progress}
|