نتایج جستجو برای: dredging
تعداد نتایج: 1245 فیلتر نتایج به سال:
The oligochaete Limnodrilus hoffmeisteri at Foundry Cove (FC), New York evolved genetic resistance to cadmium (Cd) and lost resistance after contaminated sediments were removed by dredging. Selection (on survival time in dissolved Cd) was used to generate tolerance to evaluate fitness cost, the commonplace expectation for evolutionary reversal. The hypothesis that gene flow from neighboring pop...
As human pressure on the marine environment increases, safeguarding healthy and productive seas increasingly necessitates integrated, time- and cost-effective environmental monitoring. Employment of a Wave Glider proved very useful for the study of sediment transport in a shallow sandbank area in the Belgian part of the North Sea. During 22 days, data on surface and water-column currents and tu...
The southeast coast of mainland Florida is within a biogeographic transition zone of high marine biodiversity (Briggs, 1974; Gilmore, 1995). This region is also undergoing some of the most rapid human population growth of any area of the United States (Culliton et al., 1990). Due to the economic and recreational value of beaches, substantial marine dredging projects (up to 1.5 × 105 m 3 of fill...
We studied changes in macrobenthic communities following the environmental clean-up of metal-polluted (cadmium, nickel, and cobalt) sediments in Foundry Cove, a small inlet within the Hudson River estuary of New York. We used a BACI-style experiment to test the hypotheses that high levels of cadmium in sediments change macrobenthic assemblages relative to unpolluted areas, and removal of metals...
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