نتایج جستجو برای: astara forest ecosystem

تعداد نتایج: 179070  

Journal: :iranian journal of natural resources research 2012
mostafa jafari

during recent years, a series of climate projections provided for surface temperature increase and precipitation changes over the next century in various time slices. national institutes are using downscaling projections for more precise results. in this research study, various climate change projections in global, continental, regional and local scales have been examined in special forest ecos...

2017
Hidemichi Fujii Masayuki Sato Shunsuke Managi Jose G. Borges

Forest ecosystem services are fundamental for human life. To protect and increase forest ecosystem services, the driving factors underlying changes in forest ecosystem service values must be determined to properly implement forest resource management planning. This study examines the driving factors that affect changes in forest ecosystem service values by focusing on regional forest characteri...

2016
Améline Vallet Bruno Locatelli Harold Levrel Christian Brenes Pérez Pablo Imbach Natalia Estrada Carmona Raphaël Manlay Johan Oszwald

The forest transition framework describes the temporal changes of forest areas with economic development. A first phase of forest contraction is followed by a second phase of expansion once a turning point is reached. This framework does not differentiate forest types or ecosystem services, and describes forests regardless of their contribution to human well-being. For several decades, deforest...

2018
Améline Vallet Bruno Locatelli Harold Levrel Christian Brenes Pérez Pablo Imbach Natalia Estrada Carmona Raphaël J. Manlay Johan Oszwald Raphaël Manlay

The forest transition framework describes the temporal changes of forest areas with economic development. A first phase of forest contraction is followed by a second phase of expansion once a turning point is reached. This framework does not differentiate forest types or ecosystem services, and describes forests regardless of their contribution to human well-being. For several decades, deforest...

2004
Luuk K.A. Dorren Frédéric Berger Anton C. Imeson Bernhard Maier Freddy Rey

Ecosystem management of protection forests aims at maintaining forests near a state during which effective protection is secured. As the evolution of a dynamic forest ecosystem cannot be stopped, silvicultural measures are required which aim at maintaining both the ecosystem integrity and the protective function of mountain forests. Ecosystem integrity is defined as the system’s capacity to mai...

Journal: :international journal of advanced biological and biomedical research 2013
atta safari ataollah kavian aidin parsakhoo

forests are an important economic source for human and have key role in nutrient cycle, hydrology and ecosystem performance, any interference in this vital ecosystem causes to damage to forests. mechanical logging and road construction in forest areas have led to much soil compaction. soil physical and chemical properties were studied in parts of road and non-road in the darabkola forest of ira...

2009
Robert A. Smail David J. Lewis

Smail, Robert A.; Lewis, David J. 2009. Forest-land conversion, ecosystem services, and economic issues for policy: a review. PNW-GTR-797. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 40 p. The continued conversion and development of forest land pose a serious threat to the ecosystem services derived from forested landscapes. We argue that de...

Journal: :Ying yong sheng tai xue bao = The journal of applied ecology 2004
Zhiyun Ouyang Tongqian Zhao Jingzhu Zhao Han Xiao Xiaoke Wang

Ecosystem services imply the natural environmental conditions on which human life relies for existence, and their effectiveness formed and sustained by ecosystem and its ecological processes. In newly research reports, they were divided into four groups, i. e., provisioning services, regulation services, cultural services, and supporting services. To assess and valuate ecosystem services is the...

Aidin Parsakhoo Ataollah Kavian Atta Safari,

Forests are an important economic source for human and have key role in nutrient cycle, hydrology and ecosystem performance, any interference in this vital ecosystem causes to damage to forests. Mechanical logging and road construction in forest areas have led to much soil compaction. Soil physical and chemical properties were studied in parts of road and non-road in the Darabkola forest of Ira...

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