نتایج جستجو برای: protection of forests
تعداد نتایج: 21185772 فیلتر نتایج به سال:
December 2004 • Journal of Forestry Historically, many issues in US forest policy have involved heated exchanges between timber interests and environmental groups over the future of the nation’s national forests. Debate about whether national forests should produce timber and rural economic opportunities, or pursue other objectives such as ecological restoration and recreation, generally ignore...
in order to investigate the effects of management models on the diversity of wooden species, forests of third series of shiler, the first division mehrbanrud watershed and third and fourth series of eight division of behshahr – neka townships were studied with participatory and governmental management respectively. the diversity of the wooden species have been evaluated by diversity parametric...
Introduction: Protected Forest is a forest area that has variety of vital ecosystem services for the welfare and resilience society economy in future. Excessive use forests by humans without regard to ecological balance can cause havoc themselves, require economic social costs are far greater than results have been obtained. Often people who live make living around accused being one causes dest...
The conservation value of South East Asia's highly degraded forests: evidence from leaf-litter ants.
South East Asia is widely regarded as a centre of threatened biodiversity owing to extensive logging and forest conversion to agriculture. In particular, forests degraded by repeated rounds of intensive logging are viewed as having little conservation value and are afforded meagre protection from conversion to oil palm. Here, we determine the biological value of such heavily degraded forests by...
Understory protection harvesting is a form of partial cutting that can be used in aspen (Populus tremuloides Michx.)-dominated stands have understories white spruce (Picea glauca (Moench) Voss). This practice involves removing 75% to 85% the merchantable while minimizing damage advance regeneration, addition leaving 15% 25% standing reduce potential windthrow understory. In this paper, we summa...
Forests play a key role in the global carbon cycle, and programs aimed at mitigating greenhouse gas emissions through the protection and enhancement of forest carbon stocks are growing in number. Adding greenhouse gas mitigation as a management objective presents managers with a considerable challenge, because data and guidelines are scarce. Long-term inventory datasets have the potential to se...
New and rapid political and economic changes in Myanmar are increasing the pressures on the country's forests. Yet, little is known about the past and current condition of these forests and how fast they are declining. We mapped forest cover in Myanmar through a consortium of international organizations and environmental non-governmental groups, using freely-available public domain data and ope...
Globally, deforestation continues, and although protected areas effectively protect forests, the majority of forests are not in protected areas. Thus, how effective are different management regimes to avoid deforestation in non-protected forests? We sought to assess the effectiveness of different national forest-management regimes to safeguard forests outside protected areas. We compared 2000-2...
In this study, we examined the response of surface soils to increased leaf and wood litter input within adjacent successional forests recovering from agricultural disturbance at the Smithsonian Environmental Research Center (SERC), Maryland, USA. Previous studies at this site demonstrated an arrested development of O-horizon, even after 130 years of forest growth, and an annual loss of leaf lit...
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