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There are 2, 240 content items of different types and languages related to couverture du sol on the Land Portal.

couverture du sol

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multi-scale assessment of human vulnerability to climate change in the Aral Sea basin

Journal Articles & Books
Décembre, 2015

Vulnerability to climate change impacts is defined by three dimensions of human–environmental systems, such as exposure, sensitivity, and adaptive capacity. Climate change affects various aspects of human–environmental interactions, such as water stress, food security, human health, and well-being at multiple spatial and temporal scales. However, the existing protocols of vulnerability assessment fail to incorporate the multitude of scales associated with climate change processes.

Assessing long-term spatial changes of natural habitats using old maps and archival sources: a case study from Central Europe

Journal Articles & Books
Décembre, 2015
République tchèque

Landscapes intensively farmed over a long time period represent a threat for natural habitats and high levels of biodiversity. Information on the historical land use and spatial changes of natural habitats can help to explain the causes of a number of contemporary phenomena, which are important for the development of effective conservation and ecosystem management.

Influence of a Large-scale Removal of an Invasive Plant (Melaleuca quinquenervia) on Home-range Size and Habitat Selection by Female Florida Panthers (Puma concolor coryi) within Big Cypress National Preserve, Florida

Journal Articles & Books
Décembre, 2012

The control of invasive exotic plants is often deemed important for managing native wildlife, but surprisingly little research exists that evaluates benefits to wildlife, including species of conservation concern. Melaleuca quinquenervia (Melaleuca) is an invasive, non-native, broad-leaved tree that aggressively displaces native plant communities in south Florida.

Near surface air humidity in a megadiverse Andean mountain ecosystem of southern Ecuador and its regionalization

Journal Articles & Books
Décembre, 2012
Équateur

The near surface humidity in a megadiverse mountain ecosystem in southern Ecuador is examined on the basis of Relative Humidity (RH) measurements inside the natural mountain forest and at open sites along an altitudinal gradient from 1700 to 3200m. The main methodological aim of the current study is to generate a humidity regionalization tool to provide spatial datasets on average monthly mean, minimum and maximum RH, Specific Humidity (q) and Specific Saturation Deficit (DS) by using observation data of RH.

impact of vegetation and soil on runoff regulation in headwater streams on the east Qinghai–Tibet Plateau, China

Journal Articles & Books
Décembre, 2011
Chine

Vegetation type is one of many factors that affect watershed hydrology and is an especially important influence on surface hydrological processes. Canopy and ground cover vegetation provide a natural cushion against the impact energy of rainfall in headwater portions of a stream basin, increasing water filtration into the soil and reducing surface runoff, but effects of different vegetation types are not fully understood. We sought to evaluate the capacity of different vegetation communities to regulate surface runoff in an alpine landscape.

Feed-forward vs recurrent neural network models for non-stationarity modelling using data assimilation and adaptivity

Journal Articles & Books
Décembre, 2015
France
Suède
États-Unis d'Amérique

Artificial neural networks (ANN) are nonlinear models widely investigated in hydrology due to their properties of universal approximation and parsimony. Their performance during the training phase is very good, and their ability to generalize can be improved by using regularization methods such as early stopping and cross-validation. In our research, two kinds of generic models are implemented: the feed-forward model and the recurrent model.

Spatial Variation of Eurasian Eagle-Owl Diets in Wetland and Non-Wetland Habitats in West-Central Korea

Journal Articles & Books
Décembre, 2013

The diet of the Eurasian Eagle-Owl (Bubo bubo) was studied in two different land-cover types: wetlands and non-wetlands. We analyzed 1458 prey items obtained from 924 pellets and 534 prey remains collected in 34 territories in west-central Korea. Diet composition differed significantly between the two habitats: diet was mainly birds (68.9% by number; 85.3% by biomass) in wetlands, but was dominated by mammals (38.7% by number; 64.7% by biomass) in non-wetlands.

Agricultural and green infrastructures: The role of non-urbanised areas for eco-sustainable planning in a metropolitan region

Journal Articles & Books
Décembre, 2011
Italie

Non-Urbanised Areas (NUAs) are part of agricultural and green infrastructures that provide ecosystem services. Their role is fundamental for the minimization of urban pollution and adaptation to climate change. Like all natural ecosystems, NUAs are endangered by urban sprawl. The regulation of sprawl is a key issue for land-use planning. We propose a land use suitability strategy model to orient Land Uses of NUAs, based on integration of Land Cover Analysis (LCA) and Fragmentation Analysis (FA). With LCA the percentage of evapotranspiring surface is defined for each land use.

Integration of multi-disciplinary geospatial data for delineating agroecosystem uniform management zones

Journal Articles & Books
Décembre, 2015
Canada

Understanding agricultural ecosystems and their complex interactions with the environment is important for improving agricultural sustainability and environmental protection. Developing the necessary understanding requires approaches that integrate multi-source geospatial data and interdisciplinary relationships at different spatial scales. In order to identify and delineate landscape units representing relatively homogenous biophysical properties and eco-environmental functions at different spatial scales, a hierarchical system of uniform management zones (UMZ) is proposed.

Atmospheric mercury emissions in Australia from anthropogenic, natural and recycled sources

Journal Articles & Books
Décembre, 2012
Australie

The United Nations Environment Programme (UNEP) has begun a process of developing a legally binding instrument to manage emissions of mercury from anthropogenic sources. The UNEP Governing Council has concluded that there is sufficient evidence of significant global adverse impacts from mercury to warrant further international action; and that national, regional and global actions should be initiated as soon as possible to identify populations at risk and to reduce human generated releases.

Sensitivity of landscape resistance estimates based on point selection functions to scale and behavioral state: pumas as a case study

Journal Articles & Books
Décembre, 2014

Estimating landscape resistance to animal movement is the foundation for connectivity modeling, and resource selection functions based on point data are commonly used to empirically estimate resistance. In this study, we used GPS data points acquired at 5-min intervals from radiocollared pumas in southern California to model context-dependent point selection functions.

Causes and consequences of gully erosion: perspectives of the local people in Dangara area, Nigeria

Journal Articles & Books
Décembre, 2015
Nigéria

This study examines the causes and consequences of gully erosion, as perceived by the local people of Dangara area, Nigeria. The study particularly seeks to explore the local people’s perceptions of gully erosion and how it affects crop, settlement development, crop yields, land ownership and values, rural economics and private conservation investments in Dangara area of Nigeria’s Federal Capital Territory. It is based on analysis of data collected using questionnaires administered to 346 respondents in the area.