HEDGE

Hedge: Hedge: a line of shrubs covering more than 25% of the length of the boundary. Shrubs are defined by a shrub growth form. Common hedge species are hawthorn (Crataegus monogyna), blackthorn (Prunus spinosa), hazel (Corylus avellana), ash (Fraxinus excelsior) and sycamore (Acer pseudoplatanus). The woody species gorse (Ulex europaeus), broom (Cytisus scoparius), dog-rose (Rosa canina) and bramble (Rubus fruticosus) are not considered when assessing hedge shrub cover.

A Hedge can have associated features such as a bank, fence, stones or a ditch. Hedges have usually been planted but may be formed by shrub colonisation on other field boundary types such as Earth banks or Dry stone walls. Trees, defined by tree growth form, can also be present in a Hedge as small or large trees. Hedge management can vary from largely unmanaged to activities such as flat-topping, flailing or coppicing.
 

 

Hedge attributes:

select for information on Hedge gappiness.
     
Habitat examples: Click on an image to enlarge.
Hedge: distribution in NI.
The length of Hedges in NI is 8.8 km/km2, (118,619 km). They occur mainly in the lowlands (11.3 km/km2) compared with the uplands (3.7 km/km2) where they are located at the margins. Fermanagh District (10.1 km/km2) and the Wider Countryside (10.2 km/km2) have the highest concentration.
Hedge: predicted distribution map (1998).
Hedge: net change 1991 - 1998.
There was a significant net decrease of -4% (-5,489 km) in the length of Hedges. This trend is widespread throughout all the study area regions.
Hedge: summary of losses and gains 1991 - 1998.

Hedge: losses and gains 1991 - 1998.
Hedge loss was mainly by removal. Field Boundaries in the losses and gains table below are linked to their descriptors and NI data.
 
Losses
(1991 - 98)
Field
Boundaries
Gains
(1991 - 98)
km % km %
53 <1 *     Dry stone wall 107 2 *
71 <1 *     Mortared wall 5 <1  
97 <1 *     Ruined dry stone wall 73 2 *
950 <1 *     Earth bank 910 2 *
1596 1 *     Fence 1298 3 *
5395 4 *     No Field Boundary 312 - *
Note :   % = percentage of baseline length
             * = indicates significant transition (p = 0.05)
 
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