| 书目名称 | Trace Metals in the Westerschelde Estuary: A Case-Study of a Polluted, Partially Anoxic Estuary | | 编辑 | Willy F. J. Baeyens | | 视频video | | | 丛书名称 | Developments in Hydrobiology | | 图书封面 |  | | 描述 | Oceans and lakes are characterized by large residence times andcan thus be considered as being in an equilibrium or quasi-equilibriumstate. In contrast, estuaries, which constitute the interface betweenthe fresh water and marine ecosystems, are biogeochemically andphysically very dynamic. Strong gradients in physical and chemicalvariables such as temperature, pH, salinity, dissolved oxygen,nutrients, amount and composition of particulates result from themixing of fresh water and saline end members. These gradients provokeincreased biogeochemical processes, generally resulting in ageochemical filter (the area of high turbidity, showing enhancedadsorption-desorption processes) and a biological filter (thearea of high plankton activity showing, besides a high uptake ofnutrients, a high accumulation of trace metals). Both filters disturbthe conservative mixing pattern of the trace metals in an estuary..In addition, four aspects make the Scheldt estuary very unusual anddifferent from other estuaries: . .the Scheldt is atide-governed estuary which means larger residence times; ..theupper estuary receives large inputs of biodegradable organic matterwhich leads to oxygen depletion in winte | | 出版日期 | Book 1998 | | 关键词 | Atlantic Ocean; Coast; Fresh water; Ocean; Plankton; Sediment; Sedimentation; Tide; ecosystem; ecosystems; mar | | 版次 | 1 | | doi | https://doi.org/10.1007/978-94-017-3573-5 | | isbn_softcover | 978-90-481-5062-5 | | isbn_ebook | 978-94-017-3573-5 | | copyright | Springer Science+Business Media Dordrecht 1998 |
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