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There are 8, 235 content items of different types and languages related to administração fundiária on the Land Portal.
Displaying 3265 - 3276 of 5229

Grazing impacts on the susceptibility of rangelands to wind erosion: The effects of stocking rate, stocking strategy and land condition

Journal Articles & Books
Dezembro, 2015
Austrália

An estimated 110 Mt of dust is eroded by wind from the Australian land surface each year, most of which originates from the arid and semi-arid rangelands. Livestock production is thought to increase the susceptibility of the rangelands to wind erosion by reducing vegetation cover and modifying surface soil stability. However, research is yet to quantify the impacts of grazing land management on the erodibility of the Australian rangelands, or determine how these impacts vary among land types and over time.

Internal Validation of Predictive Logistic Regression Models for Decision-Making in Wildlife Management

Journal Articles & Books
Dezembro, 2009

Predictive logistic regression models are commonly used to make informed decisions related to wildlife management and conservation, such as predicting favourable wildlife habitat for land conservation objectives and predicting vital rates for use in population models. Frequently, models are developed for use in the same population from which sample data were obtained, and thus, they are intended for internal use within the same population. Before predictions from logistic regression models are used to make management decisions, predictive ability should be validated.

Effects of land management on CO₂ flux and soil C stock in two Tanzanian croplands with contrasting soil texture

Journal Articles & Books
Dezembro, 2012
Tanzania
África

Evaluation of carbon dynamics is of great concern worldwide in terms of climate change and soil fertility. However, the annual CO₂ flux and the effect of land management on the carbon budget are poorly understood in Sub-Saharan Africa, owing to the relative dearth of data for in situ CO₂ fluxes. Here, we evaluated seasonal variations in CO₂ efflux rate with hourly climate data in two dry tropical croplands in Tanzania at two sites with contrasting soil textures, viz. clayey or sandy, over four consecutive crop-cultivation periods of 40 months.

Assessing gender roles in a changing landscape: diversified agro-pastoralism in drylands of West Pokot, Kenya

Journal Articles & Books
Dezembro, 2015
Quênia

Previous studies in drylands have shown that while gender roles are becoming more flexible, privatization and formalization of land tenure tends to marginalize women in drylands while environmental degradation leads to differential changes in gender workload. Chepareria, a ward in West Pokot County, has undergone the above-mentioned tenure and environmental changes and is nowadays dominated by private enclosures as a land management approach.

Perceptions of and Adaptation to Environmental Change in Forest-Adjacent Communities in Three African Nations

Journal Articles & Books
Dezembro, 2015
Ruanda
Guiné Equatorial
Camarões

SUMMARYSemi-structured interviews were used to explore how rural communities near forests are responding to environmental change in three African nations — Cameroon, Equatorial Guinea and Rwanda. The study first recounts people's perception of environmental change — what are the issues of greatest concern identified by local communities? Second, it explores people's responses to identified environmental problems and in particular the role of forests in these processes.

Using Detection Dogs and Rspf Models to Assess Habitat Suitability for Bears in Greater Yellowstone

Journal Articles & Books
Dezembro, 2015

In the northern U.S. Rockies, including the Greater Yellowstone Ecosystem (GYE), connectivity is a concern because large carnivores have difficulties dispersing successfully between protected areas. One area of high conservation value because of its importance for connecting the GYE to wilderness areas of central Idaho is the Centennial Mountains and surrounding valleys (2500 km²) along the Idaho—Montana border just west of Yellowstone National Park.

Vegetation Responses to Pinyon–Juniper Treatments in Eastern Nevada

Journal Articles & Books
Dezembro, 2014

Comparisons of tree-removal treatments to reduce the cover of single-leaf pinyon (Pinus monophylla Torr. and Frém.) and Utah juniper (Juniperus osteosperma [Torr.] Little), and subsequently increase native herbaceous cover in black sagebrush (Artemisia nova A. Nelson), are needed to identify most cost-effective methods. Two adjacent vegetation management experiments were initiated in 2006 and monitored until 2010 in eastern Nevada to compare the costs and efficacy of various tree reduction methods.

Abomasal parasites in wild sympatric cervids, red deer, Cervus elaphus and fallow deer, Dama dama, from three localities across central and western Spain: relationship to host density and park management

Journal Articles & Books
Dezembro, 2004
Espanha

A survey of abomasal parasites in cervids from Central Spain was conducted at 3 sites, Quintos de Mora (Toledo), Maluéñez de Arriba (Cáceres), and La Herguijuela (Cáceres). Commonly occurring helminths belonged to 3 polymorphic species of the Ostertagiinae: Spiculopteragia asymmetrica/S. quadrispiculata, Ostertagia leptospicularis/O. kolchida, and O. drozdzi/O. ryjikovi. Trichostrongylus axei was found in very few cases. Ostertagia drozdzi/O. ryjikovi and the minor male morphotype, S. quadrispiculata, are reported for the first time in red deer from Spain.

Sustainable land and water management policies and practices: a pathway to environmental sustainability in large irrigation systems

Journal Articles & Books
Dezembro, 2008
Austrália

Water cycle, land management, and environmental sustainability are intimately linked. Sustainable land and water management practices are vital for sustaining agricultural productivity and regional development. Unsustainable land and water management practices that violate the system's carrying capacity constraint over long periods can impose significant costs in terms of lost opportunities in farm production and regional development, say by causing waterlogging and salinity.

Testing Focus Groups as a Tool for Connecting Indigenous and Local Knowledge on Abundance of Natural resources with Science‐Based Land Management Systems

Journal Articles & Books
Dezembro, 2014
Nicarágua

One of the clearly stated intentions of the Intergovernmental Platform on Biodiversity and Ecosystem Services (IPBES) is to bring both “western scientific” and “indigenous and local” knowledge systems within synthetic global, regional, and thematic assessments. A major challenge will be how to use, and quality‐assure, information derived from different knowledge systems.

reptile, bird and small mammal fauna of Dune Mallee Woodlands in south-western New South Wales

Journal Articles & Books
Dezembro, 2012

Baseline surveys of reptiles, birds and small mammals that occur in Dune Mallee woodlands in the Lower Murray Darling catchment of south-western New South Wales were conducted at 60 sites between October 2007 and March 2008. These surveys comprise the first round of a catchmentwide monitoring programme to obtain a measure of the distribution and abundance of 21 priority threatened fauna species that inhabit Dune Mallee Woodlands. A total of 127 fauna species were recorded, which included 19 of the possible 21 threatened fauna species.

Relating soil carbon fractions to land use in sloping uplands in northern Thailand

Journal Articles & Books
Dezembro, 2009
Tailândia

In this study from Khun Samun Watershed in northern Thailand we investigate land use and soil carbon relationships in 99 sloping upland soils that pertain to soil degradation/conservation and carbon storage/loss. Approximately 35% of the variability in total soil carbon could be explained by the available quantitative and semi-quantitative information, primarily clay content and CEC, and to a lesser degree by factors concerning land management.