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For about 50 years the desertion of areas by traditional activities has led to an important evolution of landscapes and environments
on the island of Ouessant. The study of this evolution has been undertaken at different spatial and temporal scales. On one
part of the island, a scientific investigation carried out at the scale of the parcel enabled the form of the landscape in
1850 to be compared with that of 1985. On the whole island, the evolution of spatial organization and land use was compared
between 1950 and 1985. For each of three main ecological environments, vegetational successions after the decrease of agriculture
have been studied along with their future potential changes. This work highlights some considerations about the present management
of the environment in relation to the major objectives of island environmental policies. 相似文献
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Therville Clara Mathevet Raphaël Bioret Frédéric Antona Martine 《Regional Environmental Change》2018,18(2):607-618
Regional Environmental Change - On a global scale, protected areas (PAs) are one of the main tools used for biodiversity conservation. However, accelerated biodiversity loss and lack of social... 相似文献
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Over the 20th century, reduced land cultivation has caused an extension of fallow land in several European countries, which
has led to a decrease in biodiversity. Knowledge of dynamic vegetation processes and of the impact of human activities on
biodiversity provides the basis for land management recommendations, as well as for wildlife management programs. We analysed
land-use changes on a small protected island (Ushant, Bretagne, France) using historical documentation (1844) and aerial photographs
taken in 1952 and 1992. Over this period, especially during the last 40 yr, Ushant underwent a complete transformation from
rural landscape to extensive shrubland. No cultivated area remains, grazed areas were moved from the coastal fringe to the
core of the island, while over 40% of the island is fallow land. The relationship between current sheep grazing and vegetation
suggests that grazed meadows used to be close to inhabited areas, i.e. 150 m outside the villages. These results allowed us
to analyse landcover potential related to changes in the intensity of sheep grazing. The scenarios highlighted by our method
provide an objective framework for further assessment of fallow land management. 相似文献
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