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Displaying 1177 - 1188 of 1944

Contribution of forests and forestry to mitigation of greenhouse effects in Greece. COST E21 Workshop. Contribution of forests and forestry to mitigate greenhouse effects. Joensuu (Finland). 28-30 Sep 2000

Journal Articles & Books
Décembre, 2000
Finlande
Grèce
Europe

In Greece, there is no official inventory for the activity land use, land use change and forestry. The national forest inventory was completed in 1992. Using the data of this inventory, the carbon store of woody biomass of Greece has been estimated by FAO-TBFRA (2000) as 52.04 millions t C, of which 46.36 millions t C is above stump biomass and 8.67 millions t C is stump and root biomass.

Effects of Land Cover Disturbance on Stream Invertebrate Diversity and Metal Concentrations in a Small Urban Industrial Watershed

Journal Articles & Books
Décembre, 2012

The landscape surrounding Sudbury, Ontario, has been severely affected by 100 years of mining and forestry and a recent, large-scale ecological risk assessment found that terrestrial plant communities continue to be impaired by remnant metals and poor soil conditions. We investigated the risks of these adverse landscape conditions on a small headwater stream by digitizing land cover at a fine scale and relating it to benthic invertebrate diversity and metal concentrations at 13 sites in the system.

Rehabilitation forestry and carbon market access onhigh-graded northern hardwood forests

Journal Articles & Books
Décembre, 2014
États-Unis d'Amérique

Decades of heavy-cutting and high-grading in the northeastern United States provide an opportunity for rehabilitation and increased carbon stores, yet few studies have examined the feasibility of using carbon markets to restore high-graded forests. We evaluated the effectiveness of rehabilitation on 391 ha of high-graded forest in Vermont, USA. Thirteen silvicultural scenarios were modeled over 100 years using the Forest Vegetation Simulator.

Contribution to knowledge of spatial distribution of succession trees in relationship with distance of forest border

Journal Articles & Books
Décembre, 2013
Slovaquie

Land use reflects the needs, demands and values of human society. We can see two antagonistic trends of land use change in Slovakia over the past few decades. Land use change towards more intensive in some areas (vicinity of cities, highways, lowlands), but others (uplands and mountains with traditionally agricultural used) are abandoned and left to their own spontaneous dynamic. The abandonment of agriculture is a pattern common to all industrialized countries, especially in hilly and mountain ranges (Farina, A., 2007).

Development of close to nature forestry and the role of ProSilva Europe

Policy Papers & Briefs
Décembre, 2011

We present the different facets of close to nature forestry and the reasons for its practical success. They lie in using free natural processes, the so-called biorationalisation, to achieve multi- purpose aims. This vision is fully in line with promoting good governance, achieving optimal habitat conditions and thus to improve biodiversity. This appears to be the right model for multiple use in mo

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.

Mixed tree-vegetative barrier designs: experiences from project works in northern Vietnam

Journal Articles & Books
Décembre, 2002
Viet Nam

There has been an increased interest in the use of vegetative barriers in acid-infertile upland management systems in Southeast Asia. This paper analyses the experimental designs and policies in early-1990s of using vetiver grass barriers (Vetiveria zizanioides L.) in microwatersheds with short-rotation tree plantations in Vinh Phu Province, Vietnam. Four different mixed tree-vetiver models on degraded Ferric-Plinthic Acrisols are discussed.

Reducing Indonesia's deforestation-based greenhouse gas emissions

Journal Articles & Books
Décembre, 2011
Indonésie

Indonesia has set the target that by the year 2020 its emissions of greenhouse gases will be reduced by 26 per cent relative to business-as-usual conditions. This article analyses the effectiveness of a subsidy to the use of land in forestry as a means of achieving this goal. The analysis uses a general equilibrium model of the Indonesian economy characterised by explicit treatment of land use, disaggregated by industry and by region.

Permanence of Carbon Sequestered in Forests under Uncertainty

Conference Papers & Reports
Décembre, 2011

In this paper we examine the issue of permanence in the context of sequestering carbon through afforestation. We develop a dynamic nested optimal control model of carbon sequestration associated with the decision to afforest a tract of land given there are uncertainties associated with fire and insect/disease hazards. Conceptually, these potential hazards are similar in that their occurrence at any time t is uncertain and landowners can take specific actions – although generally different actions - in any time period t to reduce the probability of sustaining losses related to them.