Journal Article 2 Research Support, Non-U.S. Gov't 2 alpine habitat Abies kawakamii 1 Taiwan 1 aerial photography 1 afforestation 1 mehr ... agriculture 1 central mountain range 1 climate change 1 common bird monitoring 1 forest density 1 fragmentation 1 global warming 1 land use changes 1 loss of biodiversity 1 mountains 1 population trend 1 topography 1 upland 1 weniger ...