co2 is the main greenhouse gas which urban forests have a high potential to absorb and sequestrate it. the air pollution of tehran is one of the most important environmental problems of the iran. to do this research 40 years old stands of robinia pseudoacacia and fraxinus rotundifolia and the surrounding barren land ( as blank) were selected in chitgar forest park of tehran and the amount of ca...

1. The National Forest Sector: context and issues Forest resources are a major economic and environmental asset in Gabon. Its forest potential is considered one of the highest in Africa, with over 21,775,000 ha of forested area constituting 85% of its total territory (FAO 2007). Close to 20,000,000 ha can be exploited (PSFE 2005). The forest reserve covers an area of about 1,800,000 ha (PSFE 20...

Spatially-explicit harvest scheduling models that can promote the development of dynamic mature forest patches have been proposed in the past. This paper introduces a formulation that extends these models by allowing the total perimeter of the patches to be constrained or minimized. Test run results suggest that the proposed model can produce solutions with fewer, larger, and more compact patch...

To support conservation planning, we ask whether a park’s impact on deforestation rates varies with observable land characteristics that planners could use to prioritize sites. Using matching methods to address bias from non-random location, we find deforestation impacts vary greatly due to park lands’ characteristics. Avoided deforestation is greater if parks are closer to the capital city, in...

The aye-aye is considered the most widely distributed lemur in Madagascar; however, the effect of forest quality on aye-aye abundance is unknown. We compared aye-aye presence across degraded and non-degraded forest at Ranomafana National Park, Madagascar. We used secondary signs (feeding sites, high activity sites) as indirect cues of aye-aye presence and Canarium trees as an indicator of resou...

organisation KuzeyDog ̆a has for the past few years led studies of the carnivores in northeastern Turkey. With the first wolf-tracking project in Turkey, the research showed that these predators move much more widely than the confines of the protected areas. Within just two months they covered an area that was 13 times larger than the national park where they were caught and fitted with GPS/GSM ...

Appropriate management of European spruce forests in this time climate change is a significant challenge. Uniform principles quality forest practice must be applied, essentially that are valuable from conservation point view. However, may problematic protected areas with mixed ownership and disparate priorities. Managerial decision-making often based on personal knowledge, previous experience, ...