نتایج جستجو برای: international wetland
تعداد نتایج: 318770 فیلتر نتایج به سال:
Background and purpose: The release of metals due to different natural and human activities, bioaccumulation, biological inseparability and toxicity, even in low densities, have caused serious threat to living creatures and human. This study evaluated the concentration of heavy metals including lead, cadmium, zinc and copper in edible tissues of Caspian Kutum (Rutilus frisii kutum) in Miankaleh...
anzali international wetland is one of the most valuable water resources as registered in ramsar convention with an extent of about 150 km2 in the south caspian sea. this wetland, not only has ecological and biological importance for migratory birds and rare fish species, but also is used for farms to discharge into the caspian sea through this wetland. therefore its pollution control is very i...
abstruct anzali wetland in north of guilan provience is an international important wetland that is recorded in ramsar convension. pollution is one of the major problems facing this wetland. in order to investigate the pollution situation, sediment core samples were taken in 7 stations in 4 districts within the wetland, namely abkenar, siakishom, hendekhale and shijan). elements were determined ...
Wetland ecotourism is one of the main branches of the tourism industry that can play an important role in revitalizing villages, creating jobs and increasing income for villagers, protecting natural, historical and cultural heritage. Accordingly, the present study was conducted from 2018 to 2019 to identify the components affecting the local communities’ participation to develop the ecotourism ...
Object-based image analysis of optical and radar variables for wetland evaluation Laura Dingle Robertson, Douglas J. King & Chris Davies To cite this article: Laura Dingle Robertson, Douglas J. King & Chris Davies (2015) Object-based image analysis of optical and radar variables for wetland evaluation, International Journal of Remote Sensing, 36:23, 5811-5841, DOI: 10.1080/01431161.2015.1109727...
The conversion of wetlands to alternative uses, or land uses that affect either water levels or water quality, have profound implications for the ecological and hydrological services wetlands provide. This study considers the hydrological externalities of agricultural production in one freshwater wetland: the Esteros del Iberà in north-eastern Argentina. Two externalities are considered. First,...
In this research, the evaluation of possible effects of land-use change on water quality in Shadegan wetland has been provided with the help of remote sensing data. The purpose of this research was to evaluate and compare user variations in 2000 and 2015 using Landsat satellite imagery (with ETM and OLI sensors) from the study area and processing them in the ERDAS software environment using the...
although individuals knowledge and awareness toward natural resources, especially wetlands had been increased but still social consideration level toward wetland importance, functions and sensitivity are low. considerable amount of wetlands destruction caused by miscalculation of wetlands functions’ values in a market condition. estimating the value of wetland’s function is a way in order to un...
background: in the recent years, eutrophication has become a serious challenge for many of the water ecosystems. it has affected the environmental and economical aspects of the anzali wetland, which is known as one of the significant ecosystem. due to the increase of the nutrient loadings from the industrial, agricultural and human activities, the wetland’s health is faced many serious problems...
Climate change and human activities have increased negative pressure on natural ecosystems. Wetlands are such ecosystems that widely affected by these negative changes. Birds as a part of wildlife in a wetland have damaged by destruction of wetlands, so, a large group of them, are at risk of extinction. Habitat destruction in wetlands in arid and semi-arid areas has more negative effects on the...
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