Passar para o conteúdo principal

page search

Displaying 3997 - 4008 of 5230

Labile nitrogen, carbon, and phosphorus pools and nitrogen mineralization and immobilization rates at low temperatures in seasonally snow-covered soils

Journal Articles & Books
Dezembro, 2007

Surface mineral horizons from four ecosystems sampled in the northwestern Italian Alps were incubated at -3 and +3°C to simulate subnivial and early thaw period temperatures for a seasonally snow-covered area. The soil profiles at these sites represent extreme examples of management, grazed meadow (site M) and extensive grazing beneath larch (site L) or naturally disturbed by avalanche and colonized by alder (site A) and the expected forest climax vegetation beneath fir (site F).

Linkages between land management activities and stream water quality in a border dyke-irrigated pastoral catchment

Journal Articles & Books
Dezembro, 2009
Nova Zelândia

This paper describes key linkages between land management activities and stream water quality for a 5230ha catchment used for intensive pastoral agriculture in southern New Zealand. Due to low annual rainfall and the wide coverage of soils with low available water-holding capacities, flood irrigation of the 2400ha of flat land within the catchment is an important feature impacting on farm business profitability and stream health. Water quality variables and nutrient and sediment yield estimates are reported for a four-year period.

Diffusion of voluntary protection among family forest owners: Decision process and success factors

Journal Articles & Books
Dezembro, 2013
Finlândia

The ongoing forest biodiversity protection programme in Finland (METSO) relies on voluntary participation of family forest owners. Even though the programme has gained wide acceptability among owners, compared to traditional conservation such as land acquisition, more owners need to be engaged. In this study, we examined how the new protection measures have diffused among forest owners. This analysis will help find means to promote the protection among owners who could but have not yet participated. The theoretical background is innovation diffusion.

Method For Landscape-Scale Vegetation Assessment: Application to Great Basin Rangeland Ecosystems

Journal Articles & Books
Dezembro, 2007
Estados Unidos

The growth of landscape-scale land management necessitates the development of methods for large-scale vegetation assessment. Field data collection and analysis methods used to assess ecological condition for the 47165-h North Spring Valley watershed are presented. Vegetation cover data were collected in a stratified random design within 6 Great Basin vegetation types, and the probability of detecting change in native herbaceous cover was calculated using power analyses.

Changes in the fragmentation and ecological stability of the Morava River floodplain forest in the course of the 20th century

Policy Papers & Briefs
Março, 2009
República Checa

This paper presents the results of an analysis of the changes in the fragmentation and ecological stability of the floodplain forest geobiocoenoses in the Protected Landscape Area Litovelske Pomoravi, Czech Republic. Using GIS methods, it was determined that the fragmentation within the study area had increased slightly and the ecological stability of the landscape had decreased slightly between the years 1938 and 2006, although the latter remained on a fairly high level.

Methodical approaches to the improvement of the use of lands and organization of the territory of agricultural organizations in conditions of ecologization of land use

Policy Papers & Briefs
Dezembro, 2012
Bielorrússia

In the conditions of the Republic of Belarus there were presented theoretical statements and methodical approaches to the improvement of the use of lands and organization of the territory of agricultural organizations in conditions of ecologization of land use. There were formulated the notion and tasks of improvement of the use of lands of agricultural organizations.

Fire resistance of tree species explains historical gallery forest community composition

Journal Articles & Books
Dezembro, 2011
Estados Unidos
América do Norte

Fire, climatic variability, and grazing by large herbivores have historically limited woody vegetation in the tallgrass prairie region of North America to gallery forests in protected areas along rivers and streams. Fire, in particular, has been a strong selective pressure against woody vegetation. Consequently, we expect that dominant tree species in these forests have developed mechanisms for tolerating periodic surface fires.

[Special features and economic principles of assessing a land plot]

Policy Papers & Briefs
Dezembro, 2009
Ucrânia

The specificity and uniqueness of land as a land appraisal object are disclosed. Principles of land appraisal are considered, their interrelation and dependence on land use features are shown.

Розкрито специфіку і унікальність землі як обєкта оцінки. Розглянуті принципи оцінки земельних ділянок, показаний їх взаємозвязок і залежність від особливостей використання землі.

Contribution of Traditional Knowledge to Ecological Restoration: Practices and Applications

Journal Articles & Books
Dezembro, 2012

Traditional knowledge has become a topic of considerable interest within the research and development environment. The contribution of traditional knowledge to conservation and management is increasingly recognized, and implementation endeavours are underway in several countries. The current scale of ecosystem degradation underscores the need for restoration interventions. It is increasingly recognized that successful ecological restoration depends on effective coordination of science and traditional ecological knowledge.

new LandscapeDNDC biogeochemical module to predict CH4 and N 2O emissions from lowland rice and upland cropping systems

Journal Articles & Books
Dezembro, 2015

BACKGROUND AND AIMS: Replacing paddy rice by upland systems such as maize cultivation is an on-going trend in SE Asia caused by increasing water scarcity and higher demand for meat. How such land management changes will feedback on soil C and N cycles and soil greenhouse gas emissions is not well understood at present. METHODS: A new LandscapeDNDC biogeochemical module was developed that allows the effect of land management changes on soil C and N cycle to be simulated.

Coupled Carbon and Nitrogen Inputs Increase Microbial Biomass and Activity in Prairie Bioenergy Systems

Journal Articles & Books
Dezembro, 2015

Soil microorganisms drive cycling and storage of soil carbon (C) and nitrogen (N) through decomposition of plant root and litter inputs. However, microbial activities vary greatly in time and space as well as with land management. The goal of this study was to address the seasonal role of microbial activity in soil C and N storage and cycling in harvested prairie and corn ecosystems.