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Europe is home to a wide variety of ecosystems, ranging
from the Atlantic coast to the Russian steppes, and from the boreal forest
and tundra of Scandinavia to Mediterranean forests and shrubland (EEA 2001).
Europe is also an important crossroads for large populations of migratory
species shared with Africa, West Asia and North America.
Agricultural land covers some 45 per cent of Europe and most natural
habitats are therefore restricted in extent. The impact of agriculture
on biodiversity is thus a key issue (Hoffmann 2000). The genetic modification
of organisms for agriculture has also emerged as an important issue relating
to biodiversity.
The landscape has been significantly modified by human activities, including
deforestation, agriculture, drainage of wetlands, modifications to coastlines
and river courses, mining, road construction and urban development (EEA
2001). As a result, natural habitats have been reduced in size and fragmented,
and are therefore less able to support wildlife. Habitats such as lowland
forests and wetlands have undergone particularly large declines. Relatively
pristine areas remain in some Nordic and Eastern European countries (EEA
2001).
Many large mammals such as the polar bear (Ursus arctos), wolf
(Canis lupus), lynx (Lynx lynx) and bison (Bison bison
bonasus) are now restricted to small remnants of their original habitat
while others such as the tarpan (Equus caballus) and the saiga
(Saiga tatarica) have become extinct (EEA 2001). Some 260 vertebrate
species are now considered to be threatened with extinction in Europe
(see bar chart). Other species, such as the lark (Alauda arvensis)
and the hare (Lepus europaeus) are directly associated with agricultural
landscapes, and have therefore benefited from human activities. Similarly,
species such as the seagull (Larus spp.) and black kite (Milvus
migrans) have increased in abundance due to growth in urban waste
sites (EEA 2001).
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