BACKGROUND AND METHODS Idiopathic autism, suspected to be caused by exposure of genetically susceptible individuals to unknown environmental triggers, has increased dramatically in the past 25 years. The objectives of our study were to determine, using a linear regression model, whether the county prevalence of autism in the Pacific Northwest of the United States was associated with the source ...

some scientists are interesting to study in area of harvested ecological modelling. the harvested population dynamics is more realistic than other ecological models. in the present paper, some of the lotka-volterra predator-prey models have been considered. in the said models, existing species are harvested by constant or variable growth rates. the behavior of their solutions has been analyzed ...

identification of rapid degradation of ecological resources requires effective environmental monitoring including ecological integrity assessment .our first aim is to analyze ecological integrity in a landscape context while developing a method to assess integrity in spite of a dearth of historical data. we used a spatial-temporal reference framework for land cover maps for assessing ecological...

the ecological footprint is a useful tool that we can use it to inform the public about the pressure on ecology and the environment. also, by measuring it, policymakers can design and implement the necessary programs to help reduce that pressure. in order to measure the potential impact of future activities and policies of development programs on the environment, it is necessary to study the sh...

according to ipcc report 2013, the role of man in environmental catastrophe is incontrovertible because of high greenhouse emission in now and recent century. buildings nearly discharge one third of these pollutants and the task of architects to prevent this hazardous procedure is critical. in the other hand, one main basis of sustainability is education due to preserve environment and then, tr...

This study aimed to assess ecological quality status of hard substratum macroinvertebrates communities of the Caspian Sea with three ecological indices and their relation with environmental factors. For this purpose benthic communities of the Caspian Sea basin were studied seasonally during 2014 in 8 sampling sites. Temperature, salinity, dissolved oxygen, pH, nitrate, nitrite, silicate and pho...

deforestation in the past decades has risen. so, the proper development of human activities in forests requires the environmental limitations to be considered during forests management process. one of the appropriate measures is the determination of ecological vulnerability. in the present study, patom district of kheyrud forest was classified based on the ecological sustainability, using objec...

Wetlands are important to the survival of the earth environment and ecosystems, along with the extent of the ecological study of regional governance continues to accelerate, the regulators have implemented various ecological management project management process kinds of data and information related to the increasing range. The traditional data management model is difficult to meet the current ...