نتایج جستجو برای: protection of forests

تعداد نتایج: 21185772  

2002
Lynn Hubbard Aino Rantavaara Kasper Andersson Jørn Roed

This report compiles background information that can be used in planning appropriate countermeasures for forest and park areas in Denmark, Sweden, Finland and Norway, in case a nuclear accident results in large-scale contamination of forests. The information is formulated to inform the forestry sector and radiation protection experts about the practicality of both forest management techniques a...

2011
François Olivier Ruf

Most researchers defend cocoa agroforests as a model, which guarantees sustainable cocoa production while protecting biodiversity. However, in most countries, farmers' strategies favour "full sun" cocoa farms, close to the concept of monoculture. Why this apparent paradox? Field surveys were conducted in 2005 and 2008 with 180 migrant and autochthon farmers in four districts of Ghana, including...

2013
C Bulafu D Baranga P Mucunguzi R J Telford V Vandvik

Private forests harbor considerable biodiversity, however, they are under greater threat than reserved areas, particularly from urbanization, agriculture, and intense exploitation for timber and fuel wood. The extent to which they may act as habitats for biodiversity and how level of protection impacts trends in biodiversity and forest structure over time remain underresearched. We contribute t...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2008
Kwaw S Andam Paul J Ferraro Alexander Pfaff G Arturo Sanchez-Azofeifa Juan A Robalino

Global efforts to reduce tropical deforestation rely heavily on the establishment of protected areas. Measuring the effectiveness of these areas is difficult because the amount of deforestation that would have occurred in the absence of legal protection cannot be directly observed. Conventional methods of evaluating the effectiveness of protected areas can be biased because protection is not ra...

Journal: :Genetics and molecular research : GMR 2015
Y J Ge Y J Liu A H Shen X C Lin

Fengshui forests (sacred groves) are important in traditional Chinese culture and home to many endangered species. These forests may provide protection for some endangered plant species outside the nature reserves, but little is known about their role in genetic conservation. Using inter-simple sequence repeat (ISSR) markers, we compared the genetic diversity of 6 populations of Phoebe bournei ...

2017
Pablo Cuenca Cristian Echeverria

Most protected areas (PA) try to limit logging of forests by means of restrictions on access and use, especially in areas where local communities coexist with the forests and depend on resources derived from PAs. In such contexts, achieving full or effective protection of the forests is almost impossible. This fact has led to researching beyond PAs boundaries in order to examine large surroundi...

2015
Gillian L. Galford Britaldo S. Soares-Filho Laura J. Sonter Nadine Laporte Ben Bond-Lamberty

Central Africa's tropical forests are among the world's largest carbon reserves. Historically, they have experienced low rates of deforestation. Pressures to clear land are increasing due to development of infrastructure and livelihoods, foreign investment in agriculture, and shifting land use management, particularly in the Democratic Republic of Congo (DRC). The DRC contains the greatest area...

Journal: :Journal of the Japanese Society of Snow and Ice 1991

Journal: :محیط زیست طبیعی 0
غلامحسین مرادی دانشکده منابع طبیعی، دانشگاه تهران جهانگیر فقهی دانشیار دانشکده منابع طبیعی، دانشگاه تهران محمود زبیری استاد دانشکده منابع طبیعی، دانشگاه تهران هارالد واسیک دانشیار دانشگاه علوم زیستی و منابع طبیعی وین، اتریش

the aim of this research was to evaluate and select of appropriate indicators for different zones of baghe shadi region where it have six different zones (restricted zone, protected zone, restored zone, inhibition zone, recreational zone and other uses zone). to do so, first top-down approach and likert scale questionnaire was used for voting from 32 experts. after that using influence matrix, ...

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