Forest ecosystem condition

Major pressures affect the forest and their ecosystems. Harmonised methods have been developed to report main health indicators: foliar nutrient content, tree crown condition, and soil condition. The indicators are monitored with different spatial extent and temporal frequency. Not all these indicators are available for all European countries. Most sources aggregate the data at the EU level as noted in the graphs below.

Tree crown condition

CHART UNDER CONSTRUCTION

Soil acidity is an important soil property that influences concentrations of important nutrients and minerals. Low soil acidity may cause unfavorable growing conditions for forests. 

Soil condition

CHART UNDER CONSTRUCTION

Main disturbances on forest ecosystems

The main disturbances on forests comprise forest fires, diseases, insects and storms.

Forest area affected by fires, 1000 ha/year

Denmark has little or no forest fire occurences.

NO DATA REPORTED

 

Forest area affected by pathogens, 1000 ha/year

Insect damage has remained consistent, usally affecting between 3 000 to 4 000 ha of forest area per year.

 

Forest area affected by insects, 1000 ha/year

Forest area affected by disease has increased in the last few years upwards of 4 000 ha per year.

 

Forest area affected by severe weather, 1000 ha/year

 

Deforestation

Deforestation is defined as the permanent conversion of forest land to agriculture, grassland, wetland and urban areas. Deforestation covers forest areas where the impacts of disturbance, over-utilisation or changing environmental conditions affect the forest to an extent that it cannot sustain a canopy cover larger than 10 percent.

Harvesting and logging activities are not considered as deforestation when the forest regenerate naturally or by silvicultural measures.Includes permanent reduction of the tree canopy cover below the minimum 10 percent threshold.

Deforestation, 1000 ha/year

 

Forest fragmentation

Forest fragmentation is breaking large, contiguous forested areas into smaller forest patches, separated by roads, agriculture, utility corridors or other anthropological developments.

Fragmentation threatens forest health and vitality. Large and intact forest ecosystems are essential to maintaining a good forest and biodiversity condition. Increased fragmentation means large forest patches decrease and small forest patches increase.

Share of different forest patch sizes in 2018, % of total forest area

 

Invasive alien species in forest ecosystems

Invasive species are a threat to the local biodiversity and ecosystem. They often have no natural enemies in the introduced area.

Number of invasive species

CHART UNDER CONSTRUCTION

Note on this: The data below is not necessarily applicable only to forests, but can have an impact on the country’s forest ecosystem.

Cumulative number of alien species

CHART UNDER CONSTRUCTION