نتایج جستجو برای: protection of forests
تعداد نتایج: 21185772 فیلتر نتایج به سال:
The paper investigates the spatial heterogeneity of public’s preferences for the implementation of a new country-wide forest management and protection program in Poland. Spatial econometric methods and high resolution geographical information system data related to forest characteristics are used to explain the variation in individual-specific willingness to pay (WTP) values, derived from a dis...
One major concern regarding the biodiversity impacts of Reduced Emissions from Deforestation and Degradation (REDD+) is “leakage” of threats from REDD+ to non-REDD+ forests, particularly if those forests storing the highest amounts of carbon – and thus prioritized under REDD+ – do not coincide with those most important for biodiversity conservation. This concern applies globally, and has been p...
Lack of hunting and predators and proximity to human communities make suburban forests prone to high deer abundance and non-native plant invasions. I investigated these likely drivers of community structure in the herb layers of six suburban forests in one region of New Jersey, USA. In 223 plots I assessed the herb layer response to 2.5 years with or without deer fencing and the early stage of ...
Due to the increasing industrial activities in many tropical and subtropical coastal areas, social concerns in relation to the impact of anthropogenic activities on mangrove forests have been increased. Surface mangrove sediments (0–10 cm) from three mangrove forests in Bushehr, northern Persian Gulf were sampled for metal analysis in April 2009. The concentrations ranged (in µg g-1 dry weight)...
Management of natural ecosystems, like forests, has several objectives such as wood production, sustainability of ecological systems, preserving aestheti,c and cultural or psychological satisfaction. This management is especially essential in dry regions with sensitive biodiversity, like Iran. The aim of this research is to elaborate a management scheme for developing a sustainable tourism plan...
Forests currently absorb billions of tons of CO2 globally every year, an economic subsidy worth hundreds of billions of dollars if an equivalent sink had to be created in other ways. Concerns about the permanency of forest carbon stocks, difficulties in quantifying stock changes, and the threat of environmental and socioeconomic impacts of large-scale reforestation programs have limited the upt...
The genus Calendula belongs to tribe Calenduleae, (Asteraceae family). Itmorphologically studied for the ongoing project of the flora of Iran. Based on the herbarium studies and field observation, this genus has been revised. The study was based on fresh material from field as well as herbarium specimens. All specimens existed in the herbarium of Research Institute of...
Species diversity protection will ensure the protection of natural processes and ecological values. Appropriate information on the condition and location of endanger species will facilitate the management and conservation of forest areas. The present study was conducted in Arasbaran forests for the purpose of evaluating two sampling methods including circular sampling (1000 m2 area) and the nea...
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