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Optimization of net returns from wildlife consumptive and non-consumptive uses by game reserve management

Journal Articles & Books
Dezembro, 2016
África do Sul
África austral

Landowners and game reserve managers are often faced with the decision whether to undertake consumptive (such as hunting) and/or non-consumptive (such as tourism) use of wildlife resources on their properties. Here a theoretical model was used to examine cases where the game reserve management allocated the amount of land devoted to hunting (trophy hunting) and tourism, based on three scenarios: (1) hunting is separated from tourism but wildlife is shared; (2) hunting and tourism co-exist; and (3) hunting and tourism are separated by a fence.

Collateral benefits from public and private conservation lands: a comparison of ecosystem service capacities

Journal Articles & Books
Dezembro, 2015
Estados Unidos

Protected areas remain the most commonly used tool for in situ conservation; however growth in the USA's system of public lands has stagnated while private land conservation continues to expand. Easements can provide a range of ecosystem services (ESs), but it is unknown whether conservation easements maintain ES capacities equivalent to public protected areas.

What the soil reveals: potential total ecosystem C stores of the Pacific Northwest region, USA

Journal Articles & Books
Dezembro, 2005
Estados Unidos

How much organic C can a region naturally store in its ecosystems? How can this be determined, when land management has altered the vegetation of the landscape substantially? The answers may lie in the soil: this study synthesized the spatial distribution of soil properties derived from the state soils geographic database with empirical measurements of old-growth forest ecosystem C to yield a regional distribution of potential maximum total-ecosystem organic C stores.

Modeling Bare Ground With Classification Trees in Northern Spain

Journal Articles & Books
Dezembro, 2009
Espanha

Bare ground abundance is an important rangeland health indicator and its detection is a fundamental part of range management. Remote sensing of bare ground might offer solutions for land managers but also presents challenges as modeling in semiarid environments usually involves a high frequency of spectral mixing within pixels.

Improved management of Vertisols in the semiarid tropics for increased productivity and soil carbon sequestration

Journal Articles & Books
Dezembro, 2003

This study was undertaken to test the hypothesis that an improved system of catchment management in combination with appropriate cropping practices can sustain increased crop production and improve soil quality of Vertisols, compared with prevailing traditional farming practices. Initiated in 1976, the improved system consisted of integrated land management to conserve soil and water, with excess rainwater being removed in a controlled manner. This was combined with improved crop rotation (legume based) and integrated nutrient management.

Scaling net ecosystem production and net biome production over a heterogeneous region in the western United States

Journal Articles & Books
Dezembro, 2007
Estados Unidos

Bottom-up scaling of net ecosystem production (NEP) and net biome production (NBP) was used to generate a carbon budget for a large heterogeneous region (the state of Oregon, 2.5x10⁵ km2) in the western United States. Landsat resolution (30 m) remote sensing provided the basis for mapping land cover and disturbance history, thus allowing us to account for all major fire and logging events over the last 30 years. For NEP, a 23-year record (1980-2002) of distributed meteorology (1 km resolution) at the daily time step was used to drive a process-based carbon cycle model (Biome-BGC).

Vegetation changes in Conservation Reserve Program lands in interior Alaska

Journal Articles & Books
Dezembro, 2010
Estados Unidos

Over 14 million hectares of erosion prone cropland in the United States has been converted into grasslands through the Conservation Reserve Program (CRP) administered by the United States Department of Agriculture, however, studies of the effects of CRP enrollment on plant communities and subsequent plant succession are largely lacking.

Potential Impacts and Management Implications of Climate Change on Tampa Bay Estuary Critical Coastal Habitats

Journal Articles & Books
Dezembro, 2014

The Tampa Bay estuary is a unique and valued ecosystem that currently thrives between subtropical and temperate climates along Florida’s west-central coast. The watershed is considered urbanized (42� % lands developed); however, a suite of critical coastal habitats still persists. Current management efforts are focused toward restoring the historic balance of these habitat types to a benchmark 1950s period. We have modeled the anticipated changes to a suite of habitats within the Tampa Bay estuary using the sea level affecting marshes model under various sea level rise (SLR) scenarios.

Enjeux fonciers, exploitation des ressources naturelles et Forêts des Communautés Locales en périphérie de Kinshasa, RDC

Journal Articles & Books
Dezembro, 2011
República Democrática do Congo

Land issues, exploitation of natural resources, and Forests of Rural Communities in the periphery of Kinshasa, DRC. Peri-urban forests are under strong anthropic pressure. Any activity needs a previous identification of stakeholders, landscape perception, socio-economic trends in local communities and their relationships with land and natural resources. Kinshasa (capital of Democratic Republic of Congo, DRC) is a 10 millions inhabitants city with rapid growth and increasing impacts on surrounding villages linked with forest natural resources.

Impact of soil management practices on physical and chemical properties of soils formed in marls, conglomerates or schists in sloping olive groves

Journal Articles & Books
Dezembro, 2012
Grécia

In west Crete, Greece we studied the effect of land management practices, tillage and no tillage, on physical and chemical properties of autochthonous soils that were formed in marls, conglomerates or schists in slopes higher than 10%. Soil organic matter content was higher in the case of no tillage in soils formed on conglomerates. The conglomerates soil content in available P was 8.27 mg kg-1 in the case of no-tillage and 2.87 mg kg-1 in tillage while in soils formed on marls it was 26.65 and 16.83 mg kg-1, respectively.

carbon budget of a winter wheat field: An eddy covariance analysis of seasonal and inter-annual variability

Journal Articles & Books
Dezembro, 2012

Arable land occupies large areas of global land surface and hence plays an important role in the terrestrial carbon cycle. Therefore agro-ecosystems show a high potential of mitigating greenhouse gas emissions while optimizing agricultural management. Hence, there is a growing interest in analyzing and understanding carbon fluxes from arable land as affected by regional environmental as well as management conditions.

Meadow management and occurrence of corncrake Crex crex

Journal Articles & Books
Dezembro, 2007

The aim of this study was to analyse the occurrence of corncrakes in two Swedish meadow sites managed by mowing and grazing, but also with abandoned meadows. Most corncrakes (58%) on meadows were found in unmanaged areas without subsidies to the farmers (i.e. areas with tall vegetation). Several corncrakes (62%) were found in restored areas, managed for less than 10 of the last 40 years, fewer (38%) in areas under continuous management.