نتایج جستجو برای: anthropogenic activities
تعداد نتایج: 397759 فیلتر نتایج به سال:
Mapping Glitches of Juniper Forests in Lebanon under Natural Conditions and Anthropogenic Activities
Abstract Land-use change remains the main threat to tropical forests and their dependent fauna flora, degradation of existing forest remnants will further accelerate species loss. Forest may result directly from human use or through spatial effects land-use change. Understanding drivers its on biodiversity is pivotal for formulating impactful management monitoring protocols, but such knowledge ...
Both soil and water become contaminated by oil and oil derivatives due to accidental spills in their exploitation, transportation, processing, storing and utilization. In 2010, 3.91 billion tons of crude oil was produced (BP Statistical Review, 2011) and estimations are that annually 0.1% of produced petroleum is released into the environment (Ward et al., 2003) as a result of anthropogenic act...
In the stratosphere, the ozone (O3) plays a role of natural and beneficial screen in relation to the harmful effects of ultraviolet (UV) for the organic matter (= good ozone). In the troposphere, O3 is a pollutant that is produced during the atmospheric photo-oxidation of ozone precursors: Volatile Organic Compounds (VOCs) and nitrogen oxides (NOx) mainly emitted by anthropogenic activities (= ...
The conservation status of Convolvulus scindicus Stocks in Pakistan, was assessed according to IUCN red data categories and criteria. After three years (2006-2008) of extensive field studies based on population size, distribution range, nature of habitat and anthropogenic activities, the conservation status of Convolvulus scindicus has been classified as an endangered (EN) species. Conservation...
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...
One of the largest karst springs in North China, the Jinci Springs, dried up and has remained dry since 1994. We develop a correlation analysis with time-lag and a regression analysis with time-lag to study the relation between spring flow and precipitation. This allows us to obtain a better understanding of karst hydrological processes by differentiating the contribution of variation in precip...
To make passive acoustic monitoring of the marine environment an accepted quantitative tool for measuring sea surface conditions (wind speed, rainfall and sea state), monitoring for the presence and identity of marine wildlife (especially whales), and monitoring anthropogenic activities including shipping, sonar and other industrial activities. By establishing a methodology for describing the s...
Arraial do Cabo is where upwelling occurs more intensively on the Brazilian coast. Although it is a protection area it suffers anthropogenic pressure such as harbor activities and sporadic sewage emissions. Short-time studies showed a high variability of bacterial production (BP) in this region but none of them evaluated BP during long periods in a large spatial scale including stations under d...
Multiple stressors threaten stream physical and biological quality, including elevated nutrients and other contaminants, riparian and in-stream habitat degradation and altered natural flow regime. Unconventional oil and gas (UOG) development is one emerging stressor that spans the U.S. UOG development could alter stream sedimentation, riparian extent and composition, in-stream flow, and water q...
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