Justification for indicator selection
MAIN ADVANTAGES OF THE INDICATOR
- Biodiversity relevance: deadwood is a measure of habitat quality relevant for thousands of European forest organisms, several threatened. Data on deadwood can be collected at relatively low cost in national forest inventories and the indicator is reported by countries according to agreed definitions.
- Accepted methodology.
- Geographical coverage: pan-European.
- No rationale references available
Volume of standing and lying deadwood in forest and other wooded land, classified by forest type (Ministerial Conference on the Protection of Forests in Europe (MCPFE) (MCPFE) definition). In national forest inventories, countries generally classify according to type (standing, snags, lying, species and state of decay).
No units have been specified
Policy context and targets
Deadwood (coarse woody debris) in form of snags (dead standing trees) and logs (dead lying trees) is a habitat for a wide array of organisms and after humification an important component of forest soil. Some species are dependent, during some part of their life cycle, to find a place to live, either on the surface or in cavities/protected places of dead or dying wood of moribund or dead trees (standing and fallen), or upon wood-inhabiting fungi or other species. Because of lack of deadwood in multipurpose forests many of the species dependent on deadwood are endangered.
At present it is still debated what amount of deadwood is required in order to maintain the most valuable species and under what circumstances the accumulated deadwood component may give rise to a risk for insect outbreaks.
Relation of the indicator to the focal area
Decaying wood habitats are important components of biodiversity in European forests and recognised as an indicator for assessing and monitoring biodiversity as well as sustainable forest management.
No targets have been specified
Related policy documents
No related policy documents have been specified
Methodology for indicator calculation
Definition of terms:
Terminology is well defined for international reporting by MCPFE. Dead wood (coarse woody debris) as such as well as the methodology for reporting of volume are thus defined by MCPFE.
On a national scale monitoring of deadwood is carried out in several National forest Inventories (NFIs). Work towards harmonisation of terminology is carried out by the COST E43 action. This comprises type classification (standing, bending, lying) as well as potentially important additional parameter (Uprooted stems, Clearcut stems, Pieces of stems, Cut branches, Uprooted staves, Logging residues, Fine woody debris, Intact snags, Broken snags, Broken, lying stems without uprooting). There are several approaches to register state of decay, most commonly this is classified in 5 classes. Noting the tree species is desirable but data are not collected by everybody.
MCPFE has defined the following reporting of the indicator "Deadwood":
- Status: m3/ha.
- Changes: m3/ha/yr.
Figures to be reported on
- Volume of dead standing trees (snags) and lying trees (logs) on forest area and
other wooded land, classified by forest type.
Minimum length and diameter of standing and lying dead trees
- Length: 2 m.
- Diameter: It is up to the countries to define the minimum size of diameter to be
reported. It is recommended that the minimum size be:
Standing deadwood: 10 cm d.b.h.
Lying deadwood: 10 cm mean diameter.
A European Forest Types classification has been proposed to MCPFE (EEA, 2006).
Methodology for gap filling
No methodology for gap filling has been specified. Probably this info has been added together with indicator calculation.
No methodology references available.
EEA data references
- No datasets have been specified here.
External data references
Data sources in latest figures
No uncertainty has been specified
Data sets uncertainty
No uncertainty has been specified
MAIN DISADVANTAGES OF THE INDICATOR
- The indicator is a general measure on habitat quality. It will not, at least not in international reporting, be possible to evaluate the indicator with respect to specific organisms, e.g. threatened species.
- A minimum level of required deadwood to create suitable habitats in multifunctional forests is not yet defined. This will probably have to be done when developing management plans at landscape or stand scales. Huge amounts of deadwood may also be a risk (insect calamities, fire).
- Methodology to measure deadwood differs between countries. Some countries include also tree stumps into the calculations. Numbers may also be influenced by the share of undisturbed forest (in which case figures for deadwood may reflect the share of undisturbed forest instead of the real amount of dead wood in production forests).
ANALYSIS OF OPTIONS
The 35 MCPFE quantitative indicators (http://www.mcpfe.org/documents/r_2007/ici)
all relate to sustainable forestry management. From this set, those with most direct relevance to biodiversity were selected.
Short term work
Work specified here requires to be completed within 1 year from now.
Long term work
Work specified here will require more than 1 year (from now) to be completed.
Work descriptionSUGGESTIONS FOR IMPROVEMENT Applying the proposed European Forest Types (EEA, 2006). More research is required on the quality and quantity of dead wood and the related biodiversity components.
No resource needs have been specified
Deadline2099/01/01 00:00:00 GMT+1
Responsibility and ownership
EEA Contact InfoKatarzyna Biala
For references, please go to www.eea.europa.eu/soer or scan the QR code.
This briefing is part of the EEA's report The European Environment - State and Outlook 2015. The EEA is an official agency of the EU, tasked with providing information on Europe’s environment.
PDF generated on 25 Nov 2015, 05:32 AM