This article elaborates the landscape characteristics of some ancient towns in detail in Sichuan area combined with examples. Aiming at the negative influence from urbanization, some countermeasures are put forward su...This article elaborates the landscape characteristics of some ancient towns in detail in Sichuan area combined with examples. Aiming at the negative influence from urbanization, some countermeasures are put forward such as the need for legislation, respect for the natural environment, extension of the historical cultural significance of towns, and development of the cultural tourism industry and so on.展开更多
【Title】【Author】【Addresses】1Traditional landscape elements such as pasture patches enclosed in a forest matrix are progressively disappearing throughout the European Alps. We assessed the land mosaic shift of a p...【Title】【Author】【Addresses】1Traditional landscape elements such as pasture patches enclosed in a forest matrix are progressively disappearing throughout the European Alps. We assessed the land mosaic shift of a protected area located in the western Italian Alps. In particular, the dynamics of pasture patches were studied at both landscape and stand level. Land-cover mapping through object-oriented analysis of historical aerial photographs was used to assess land-cover changes between 1954 and 2000. Spatial statistics were used to quantify landscape patterns, and field samplings within pasture patches were used to explore tree regeneration structure and composition. Our results showed a significant increase in the number of pasture patches caused by their fragmentation following forest expansion. The total surface area of pasture patches decreased by 43% and their core area decreased by 94%. The encroachment of trees on less accessible areas of the pasture patches caused a reduction of patch shape at landscape scale. The gap filling process started 40-50 years ago and began with an early invasion of light demanding species like sycamore maple （Acer pseudoplatanus L.） and common ash （Fraxinus excelsior L.）, followed by European beech （Fagus sylvatica L.） and secondarily silver fir （Abies alba Mill.）. Traditional land-use and population decline in the Pesio Valley led to a reduction in ecotone areas. A transition to a more homogeneous landscape is expected in the next decades. Given the cultural and productive nature of these mountain meadow-pasture communities, extensive livestock grazing systems could be used to manage their future conservation.展开更多
British-Pakistani Sadiq Khan,the Labour Party candidate,was elected as the new Mayor of London on May 8.Khan’s victory has set two records in Britain and Western Europe.He has become London’s first mayor to come fro...British-Pakistani Sadiq Khan,the Labour Party candidate,was elected as the new Mayor of London on May 8.Khan’s victory has set two records in Britain and Western Europe.He has become London’s first mayor to come from an ethnic minority background,and he is also the first Muslim mayor to head a famous European metropolis.展开更多
基金Supported by the 11th 5-year Scientific Supporting Project Fund of the Ministry of Science and Technology(2006BAJ01A12-06)the 11th 5-year Planning Philosophy and Social Science Project of Sichuan Province(SC06B014)~~
文摘This article elaborates the landscape characteristics of some ancient towns in detail in Sichuan area combined with examples. Aiming at the negative influence from urbanization, some countermeasures are put forward such as the need for legislation, respect for the natural environment, extension of the historical cultural significance of towns, and development of the cultural tourism industry and so on.
基金supported by the Piedmont Region through the "Rural development plan (PSR) 2000-2006. Azione I.7 ‘Maintaining and enhancing the ecological stability of forests’ D.D. n. 395 – 15/06/2006" projec
文摘【Title】【Author】【Addresses】1Traditional landscape elements such as pasture patches enclosed in a forest matrix are progressively disappearing throughout the European Alps. We assessed the land mosaic shift of a protected area located in the western Italian Alps. In particular, the dynamics of pasture patches were studied at both landscape and stand level. Land-cover mapping through object-oriented analysis of historical aerial photographs was used to assess land-cover changes between 1954 and 2000. Spatial statistics were used to quantify landscape patterns, and field samplings within pasture patches were used to explore tree regeneration structure and composition. Our results showed a significant increase in the number of pasture patches caused by their fragmentation following forest expansion. The total surface area of pasture patches decreased by 43% and their core area decreased by 94%. The encroachment of trees on less accessible areas of the pasture patches caused a reduction of patch shape at landscape scale. The gap filling process started 40-50 years ago and began with an early invasion of light demanding species like sycamore maple （Acer pseudoplatanus L.） and common ash （Fraxinus excelsior L.）, followed by European beech （Fagus sylvatica L.） and secondarily silver fir （Abies alba Mill.）. Traditional land-use and population decline in the Pesio Valley led to a reduction in ecotone areas. A transition to a more homogeneous landscape is expected in the next decades. Given the cultural and productive nature of these mountain meadow-pasture communities, extensive livestock grazing systems could be used to manage their future conservation.
文摘British-Pakistani Sadiq Khan,the Labour Party candidate,was elected as the new Mayor of London on May 8.Khan’s victory has set two records in Britain and Western Europe.He has become London’s first mayor to come from an ethnic minority background,and he is also the first Muslim mayor to head a famous European metropolis.
