Passar para o conteúdo principal

page search

There are 8, 235 content items of different types and languages related to administração fundiária on the Land Portal.
Displaying 3445 - 3456 of 5229

Integrating single-species management and landscape conservation using regional habitat occurrence models: the northern goshawk in the Southwest, USA

Journal Articles & Books
Dezembro, 2014
Estados Unidos

Conservation planners and land managers are often confronted with scale-associated challenges when assessing the relationship between land management objectives and species conservation. Conservation of individual species typically involves site-level analyses of habitat, whereas land management focuses on larger spatial extents. New models are needed to more explicitly integrate species-specific conservation with landscape or regional scales.

Quantifying spatial–temporal change in land-cover and carbon storage among exurban residential parcels

Journal Articles & Books
Dezembro, 2014
Estados Unidos

The area of land occupied by exurban residential development is significant and has been increasing over the past several decades in the United States. Considerable attention has been drawn to the measurement of regional-scale patterns of land-cover change and assessment of its environmental and socioeconomic consequences. Yet little is known about the quantity of land-cover change within individual exurban residential parcels, which reflect homeowner preferences, land-management strategies, and the ecosystem services they generate.

integrated model for assessment of sustainable agricultural residue removal limits for bioenergy systems

Journal Articles & Books
Dezembro, 2013

Agricultural residues have been identified as a significant potential resource for bioenergy production, but serious questions remain about the sustainability of harvesting residues. Agricultural residues play an important role in limiting soil erosion from wind and water and in maintaining soil organic carbon. Because of this, multiple factors must be considered when assessing sustainable residue harvest limits.

Alley coppice—a new system with ancient roots

Journal Articles & Books
Dezembro, 2014

CONTEXT : Current production from natural forests will not satisfy future world demand for timber and fuel wood, and new land management options are required. AIMS : We explore an innovative production system that combines the production of short rotation coppice in wide alleys with the production of high-value trees on narrow strips of land; it is an alternative form of alley cropping which we propose to call ‘alley coppice’.

Visitors' satisfaction, perceptions and gap analysis: The case of Dadia-Lefkimi-Souflion National Park

Journal Articles & Books
Dezembro, 2010
Grécia

The National Park of Dadia-Lefkimi-Souflion is one of the 27 protected areas of Greece, for which a management authority has been established. It is of major ecological value, due to the existence of a large number of birds of prey. Today, the protection status of the area does not exclude the continuation of human activities, particularly in relation to outdoor recreation activities.

Spatio-temporal variability of surface soil water content and its influencing factors in a desert area, China

Journal Articles & Books
Dezembro, 2015
China

Knowledge of the variability of soil water content (SWC) in space and time plays a key role in hydrological and climatic modelling. However, limited attention has been given to arid regions. The focus of this study was to investigate the spatio-temporal variability of surface soil (0–6 cm) water content and to identify its controlling factors in a region of the Gobi Desert (40 km ²). The standard deviation of SWC decreased logarithmically as mean water content decreased, and the coefficient of variation of SWC exhibited a convex upward pattern.

role of natural habitats in agricultural systems for bird conservation: the case of the threatened Lesser Grey Shrike

Journal Articles & Books
Dezembro, 2008
Europa

Birds of agricultural systems are one of the most threatened groups of birds in Europe mainly due to their sharp population decline in recent decades. Habitat intensification resulting from more productive agricultural practices has been proposed as a major cause for these declines. However, especially in some regions such as Eastern European and Mediterranean countries, little is known about the ultimate factors linked to habitat intensification that drive population declines for different species.

Assessing Soil Quality in a Semiarid Tropical Watershed Using a Geographic Information System

Journal Articles & Books
Dezembro, 2011
Índia

Subsistence agriculture under rainfed conditions and declining or stagnant yields on irrigated farmland has raised concerns about resource management and long-term sustainability in the subtropical, semiarid region of India. Soil quality assessment has been recognized as an important step toward understanding the effects of land management practices within an agricultural watershed. This study addressed the spatial variability of soil properties and their quality at the watershed level using geostatistical methods.

Expansion of Calamagrostis villosa in sub-alpine Nardus stricta grassland: Cessation of cutting management or high nitrogen deposition?

Journal Articles & Books
Dezembro, 2009
República Checa

Calamagrostis villosa has recently expanded in Nardus stricta-dominated sub-alpine grassland of the Giant Mountains (Krkonoše/Karkonosze, the Czech Republic). To investigate whether this expansion has been promoted by high nitrogen deposition or by the cessation of agricultural management, grassland plots dominated by C. villosa were manipulated with four treatments: control (Con), fertilised (Fer), cut (Cut) and cut-fertilised (Cut-Fer).

Tracking the rhythm of the seasons in the face of global change: phenological research in the 21st century

Journal Articles & Books
Dezembro, 2009

Phenology is the study of recurring life‐cycle events, classic examples being the flowering of plants and animal migration. Phenological responses are increasingly relevant for addressing applied environmental issues. Yet, challenges remain with respect to spanning scales of observation, integrating observations across taxa, and modeling phenological sequences to enable ecological forecasts in light of future climate change.

Properties, best management practices and conservation of terraced soils in Southern Europe (from Mediterranean areas to the Alps): A review

Journal Articles & Books
Dezembro, 2012
Europa

Terrace soils are distinctive features of the agricultural landscape in Europe. Due to their historical and aesthetic significance, they are a resource for agriculture and tourism: however they are also a challenge for land conservation and management. Nevertheless, the fundamental role of terrace soils for agricultural quality and natural hazard prevention has not been fully investigated. In the past, terraced slopes became ideal sites for human settlement and agricultural activities.