Life Project on Derrinea Bog
The current conservation objective for Derrinea Bog is to restore the area of Active Raised Bog to the area present when the Habitats Directive came into force in 1994. In the case of Active Raised Bog, the objective also includes the restoration of Degraded Raised Bog.
The Area objective for Active Raised Bog is 24.97ha. Detailed restoration plans will be available in time. At present, close to 2,500m of drains will be blocked on Derrinea using hundreds of peat dams and, in some cases where machine access will not be possible, plastic dams.
A typical peat dam two years after its creation
The objective in relation to Structure and Functions (S&Fs) is that at least half of the Active Raised Bog area should be made up of the central ecotope and active flush (i.e. the wetter vegetation communities). These values have been set as Favourable Reference Values. Degraded Raised Bog still capable of regeneration should be, according to the interpretation manual, capable of regeneration to ‘active raised bog’ in 30 years if appropriate measures are put in place (i.e. no major impacting activities are present and any necessary restoration works are implemented). In the past the habitat area was considered to be all high bog not considered to be active, but this is now not accepted as much of the high bog can no longer be restored to active (see DAHG 2014). The remaining non-active high bog is considered supporting habitat for the Annex I habitats on the high bog. This supporting habitat is an essential part of the hydrological unit necessary to support Active and Degraded Raised Bog habitats. The restoration of suitable cutover areas is essential for Active Raised Bog to achieve the favourable conservation condition at the site.
It is acknowledged that a long period of time (i.e. over 30 years) may be needed after appropriate restoration works are undertaken on the cutover areas for the habitat to develop. Restoration works along the western cutover of another of our project sites – Killyconny Bog SAC – indicated the occurrence of pioneer ‘active raised bog’ vegetation 8 years after these were undertaken.
Based on the close ecological relationship between Active Raised Bog, Degraded Raised Bog and Rhynchosporion depressions, it is considered that should favourable conservation condition for ‘Active Raised Bog’ be achieved on the site, then, as a consequence, favourable conservation condition for the other two habitats would also be achieved.
No restoration works have taken place at this site to date. The LIFE prokect will be the first to undertake work on site. Drainage will be the main focus as drainage associated with the areas of former peat exploitation is the most threatening of current activities at the site – although peat-cutting no longer takes place.
The control of trees and shrubs whose regeneration is natural is not a major problem at this SAC.