Английская Википедия:Boreal Biogeographic Region

Содержание

Текст

Текст

Текст

Текст

Текст

Текст

Текст

Текст

Текст

Шаблон:Infobox ecoregion The Boreal Biogeographic Region is the biogeographic region of Northern Europe that consists primarily of coniferous forests and wetlands.

Extent

The European Commission and the Council of Europe have defined the Boreal Region for the purpose of reporting on conservation efforts and results. The Boreal Region of the European Union includes much of the Baltic sea, the Baltic states of Estonia, Latvia and Lithuania, and most of Sweden and Finland.Шаблон:Sfn The biogeographic region extends eastward into Russia.Шаблон:Sfn Most of the land is below Шаблон:Convert and is fairly flat. The north of the region merges into the forest and tundra of the Arctic Biogeographic Region, while the south merges into the deciduous forests of the Continental Biogeographic Region. In the west, the land rises into the Fennoscandia mountains, which are in the Alpine Biogeographic Region.Шаблон:Sfn

Environment

60% of the land in the European Union part of the region is covered by forest, but most of this is commercial plantings. Less than 5-10% of the forest is old growth. The typical western taiga forest contains Norway spruce (Picea abies) and Scots pine (Pinus sylvestris) growing on shallow soil covered in moss, lichen and ericaceous shrubs.Шаблон:Sfn

Petersen et al. in their 1995 review of Nordic rivers distinguish two biogeographic regions in the Fennoscandian Shield. Their Southern mixed forest rivers group in southeast Finland has short, low-gradient streams in mixed coniferous forest, connecting many clear or humic lakes, ponds, peat bogs and wetlands, which overlap the boreo-nemoral zone. The whole Neva River basin could be assigned to this region. The other region is their Boreal rivers group with "high-gradient streams in the coniferous and deciduous forests of the boreal vegetation zone."Шаблон:Sfn

Conservation

Within the European Union, the list of Natura 2000 sites in the Boreal Region was adopted in January 2005 and has since been updated several times. As of 2009 there were 6,266 Sites of Community Importance under the Habitats Directive covering more than Шаблон:Convert and 1,165 Special Protection Areas under the Birds Directive. Some sites belong to both categories. Between them they cover over 12% of the land area in the Boreal Region of the European Union.Шаблон:Sfn

Sources

• Шаблон:Citation
• Шаблон:Citation