نتایج جستجو برای: dredging

تعداد نتایج: 1245  

Journal: :Environmental pollution 2004
Qianrui Wang Daekeun Kim Dionysios D Dionysiou George A Sorial Dennis Timberlake

Sources of mercury contamination in aquatic systems were studied in a comprehensive literature review. The results show that the most important anthropogenic sources of mercury pollution in aquatic systems are: (1) atmospheric deposition, (2) erosion, (3) urban discharges, (4) agricultural materials, (5) mining, and (6) combustion and industrial discharges. Capping and dredging are two possible...

2014
F. Joseph Pollock Joleah B. Lamb Stuart N. Field Scott F. Heron Britta Schaffelke George Shedrawi David G. Bourne Bette L. Willis

In recent decades, coral reef ecosystems have declined to the extent that reefs are now threatened globally. While many water quality parameters have been proposed to contribute to reef declines, little evidence exists conclusively linking specific water quality parameters with increased disease prevalence in situ. Here we report evidence from in situ coral health surveys confirming that chroni...

Journal: :AI Magazine 2016
Sasin Janpuangtong Dylan A. Shell

ods produce a model from a set of examples. Despite the maturity of these algorithms, decisions that result from models are unlikely to be correct if data have been used indiscriminately. This is part of the so-called data-dredging problem (Smith and Shah 2002). Figure 1 shows a bemusing example: U.S. spending per annum on science, space, and technology is highly correlated with suicides by han...

2003
Filipe Alves

Patterns in community structure of meiofauna and macrofauna in relation to Portuguese clam dredging were compared during a 2-y-period o¡ Lagos and Vilamoura, south Portugal. SCUBA divers randomly sampled corer and quadrat samples before and immediately after simulating commercial dredge ¢shery. Univariate measures (abundance, number of taxa, evenness, diversity and biomass) and multivariate ana...

Journal: :PLoS Biology 2006
Liza Gross

December 2006 | Volume 4 | Issue 12 | e418 Most governments around the world set conservation policy based on the assumption that resource exploitation and species protection can co-exist in the same place. These policies have led to Orwellian “marine protected areas” that host commercial fi shing operations, leading one to wonder who’s protecting whom. A new study reveals the danger of this ap...

Journal: :PLoS Biology 2006
Liza Gross

December 2006 | Volume 4 | Issue 12 | e418 Most governments around the world set conservation policy based on the assumption that resource exploitation and species protection can co-exist in the same place. These policies have led to Orwellian “marine protected areas” that host commercial fi shing operations, leading one to wonder who’s protecting whom. A new study reveals the danger of this ap...

Journal: :PLoS Biology 2006
Liza Gross

December 2006 | Volume 4 | Issue 12 | e418 Most governments around the world set conservation policy based on the assumption that resource exploitation and species protection can co-exist in the same place. These policies have led to Orwellian “marine protected areas” that host commercial fi shing operations, leading one to wonder who’s protecting whom. A new study reveals the danger of this ap...

Journal: :Journal of the American Academy of Dermatology 2020

Journal: :Scientific American 1908

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