نتایج جستجو برای: ecological indicators
تعداد نتایج: 205687 فیلتر نتایج به سال:
The global dairy sector has significant numbers: 133 million properties maintain 363 head of cattle suitable for farming, occupying 20% the planet's agricultural land. Since beginning 1990s, farming undergone major transformations in our country, seeking to become competitive and innovative market. With such importance economy many families, control costs property is fundamental because from th...
Frogs and toads (anurans) are sensitive to a variety of anthropogenic stressors and are widely suggested as indicators of ecological condition. We surveyed 220 coastal wetlands along the U.S. shores of the Laurentian Great Lakes and quantified relationships between presence of anuran species and degree of anthropogenic disturbance. Results were used to derive explicit, functional relationships ...
We implemented an integrated ecological assessment using a GIS-based decision support system model for Upper Delaware Scenic and Recreational River (UPDE) and Delaware Water Gap National Recreation Area (DEWA)-national park units with the mid-Atlantic region of the United States. Our assessment examined a variety of aquatic and terrestrial indicators of ecosystem components that reflect the par...
Dust particles are suspended particles created from various natural and anthropogenic sources. Dust particles contain toxic metals, such as mercury (Hg), which can have harmful effects on the human health. In this study, to investigate the contamination level of Hg in the street dust in Ahvaz, 95 dust samples were collected from the pavements in the main streets. The concentration of Hg in the ...
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