نتایج جستجو برای: forest vegetation

تعداد نتایج: 144457  

2007
Zuyuan Wang Ruedi Boesch Christian Ginzler

-Forest boundary delineation is one of the key issues of forest management for Swiss National Forest Inventory (NFI). The proposed approach in this paper focuses on the detection of forest boundaries with special emphasis on spatially contiguous and reproducible results by using both aerial images and LIDAR data. The used Green Vegetation Index (GVI) is helpful to find green vegetation areas wh...

2002
Cagan H. Sekercioglu

I examined the lingering effects of past timber management practices on the vegetation structure and bird community of Kibale National Park, Uganda. I compared four forest treatments: unlogged native forest (UL), two that were selectively logged at low (LL) and high (HL) intensities in the 1960s, and a conifer plantation (PL). Forest-dependent birds were best represented at UL. LL was similar t...

2005
Scot Duncan Virginia E. Duncan

Forest succession on degraded tropical lands often is slowed by impoverished seed banks and low rates of seed dispersal. Within degraded landscapes, remnant forests are potential seed sources that could enhance nearby forest succession. The spatial extent that forest can influence succession, however, remains largely unstudied. In abandoned agricultural lands in Kibale National Park, Uganda, re...

Journal: :ISPRS Int. J. Geo-Information 2016
Shivani Agarwal Duccio Rocchini Aniruddha Marathe Harini Nagendra

Conservation of forests outside protected areas is essential for maintaining forest connectivity, which largely depends on the effectiveness of local institutions. In this study, we use Landsat data to explore the relationship between vegetation structure and forest management institutions, in order to assess the efficacy of local institutions in management of forests outside protected areas. T...

2012
M. R. Banks

The vegetation of Tasmania is complex and much of it is in a state of disclimax. At the time of European settlement, the proportion of non-forest open vegetation was 370/0, about 5% ofthis at high altitudes. In the present interglacial climate, in regions ofhigh rainfall, where rainforest dominance might be expected, approximately 45% carries sedgeland, grassland, shrub communities and wet scle...

2015
Ricardo Rocha Tarmo Virtanen Mar Cabeza

Increasing global human population and per-capita food consumption are expected to exacerbate the already massive agricultural footprint in tropical ecosystems. Madagascar is home to exceptional levels of biodiversity and is in the midst of severe land-use change, mostly driven by slash-and-burn, smallholder agriculture. Understanding the consequences of these agricultural practices for Malagas...

Journal: :Ecological Informatics 2010
Daniela Stojanova Pance Panov Valentin Gjorgjioski Andrej Kobler Saso Dzeroski

6 High quality information on forest resources is important to forest ecosystem management. Tra7 ditional ground measurements are labor and resource intensive and at the same time expensive 8 and time consuming. For most of the Slovenian forests, there is extensive ground-based infor9 mation on forest properties of selected sample locations. However there is no continuous infor10 mation of obje...

2004
Anne W. Nolin

Vegetation structure and density affect the dynamics of snow accumulation and ablation. Vegetation also affects our ability to estimate snow-covered area accurately from satellite-based sensors. The objective of this case study is to demonstrate how the angular pattern of reflectance from vegetation over snow can provide information on forest cover density. Imagery from the Multi-angle Imaging ...

2010
K. Muramatsu K. Masugi N. Soyama S. Furumi M. Daigo Nishi Machi

Vegetation species maps are useful for forestry managements and environmental ecological study. From the forestry management, broad and conifer leaf forest should be mapped. In addition to them, land-cover mapping data with high resolution is needed as validation data sets for low resolution’s land-cover mapping results. SGLI sensor on board GCOM-C satellite, which will be launched in 2014, has...

Journal: :PloS one 2015
Sarah L Shafer Patrick J Bartlein Elizabeth M Gray Richard T Pelltier

Future climate change may significantly alter the distributions of many plant taxa. The effects of climate change may be particularly large in mountainous regions where climate can vary significantly with elevation. Understanding potential future vegetation changes in these regions requires methods that can resolve vegetation responses to climate change at fine spatial resolutions. We used LPJ,...

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