نتایج جستجو برای: anthropogenic factors

تعداد نتایج: 1098792  

Journal: :Proceedings of the Karelian Research Centre of the Russian Academy of Sciences 2019

2007
Jeffrey T. Kiehl

[1] Climate forcing and climate sensitivity are two key factors in understanding Earth’s climate. There is considerable interest in decreasing our uncertainty in climate sensitivity. This study explores the role of these two factors in climate simulations of the 20th century. It is found that the total anthropogenic forcing for a wide range of climate models differs by a factor of two and that ...

Journal: :Ukrainian journal of veterinary and agricultural sciences 2022

The article presents the research results of heavy metals content in artificial reservoirs located at different distances from a number pollutants anthropogenic origin. manuscript provides data on dependence concentration copper, zinc, lead, iron, cadmium pond water their location highways and arable land. near these factors pollution causes accumulation leading to significant exceedances permi...

Journal: :Proceedings. Biological sciences 2007
Samantha A Price John L Gittleman

Half of all artiodactyls (even-toed hoofed mammals) are threatened with extinction, around double the mammalian average. Here, using a complete species-level phylogeny, we construct a multivariate model to assess for the first time which intrinsic (biological) and extrinsic (anthropogenic and environmental) factors influence variation in extinction risk in artiodactyls. Globally artiodactyls at...

2014
D. Wu J. Du H. Deng W. Wang H. Xiao P. Li

Coal combustion is the primary anthropogenic source of atmospheric iodine, which has important environmental and health effects. The iodine distribution in Chinese coals and the atmospheric iodine emission factors of coal-fired boilers are studied to estimate the iodine atmospheric flux from coal combustion in China from 1995 to 2009. The national average iodine content weighted by coal yield f...

2014
Ben Dantzer Quinn E. Fletcher Rudy Boonstra Michael J. Sheriff

Conservation physiology proposes that measures of physiological stress (glucocorticoid levels) can be used to assess the status and future fate of natural populations. Increases in glucocorticoids may reflect a more challenging environment, suggesting that the influence of human activities on free-living animals could be quantified by measuring glucocorticoids. Biomedical studies suggest that c...

Journal: :Global change biology 2015
Clinton D Francis

Global population growth has caused extensive human-induced environmental change, including a near-ubiquitous transformation of the acoustical environment due to the propagation of anthropogenic noise. Because the acoustical environment is a critical ecological dimension for countless species to obtain, interpret and respond to environmental cues, highly novel environmental acoustics have the p...

2015
D. L. LEWIS S. BARUCH-MORDO K. R. WILSON S. W. BRECK J. S. MAO J. BRODERICK

Urban environments offer wildlife novel anthropogenic resources that vary spatiotemporally at fine scales. Property damage, economic losses, human injury, or other human-wildlife conflicts can occur when wildlife use these resources; however, few studies have examined urban wildlife resource selection at fine scales to guide conflict mitigation. We studied black bears (Ursus americanus) in the ...

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