Author:
Publisher:
ISBN:
Category :
Languages : fr
Pages : 136

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Author: Philippe Bassoulet (auteur d'une thèse de sciences.)
Publisher:
ISBN:
Category :
Languages : fr
Pages : 272

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Author: Philippe Bassoullet
Publisher:
ISBN:
Category : Estuarine sediments
Languages : fr
Pages : 296

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L'étude des phénomènes érosifs, du transport en suspension et des dépôts sédimentaires dans l'estuaire de l'aulne montre qu'ils sont contrôles par le jeu des cycles de marée vive-eau-morte-eau et par l'asymétrie de l'onde de marée occasionnant un piégeage des sédiments en suspension vers une zone localisée. Ce type de ria bretonne apparait très dynamique du point de vue des sédiments en suspension

Author: Gerardo M.E. Perillo
Publisher: Elsevier
ISBN: 0080532497
Category : Science
Languages : en
Pages : 489

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Approx.470 pages

Author: Bruce J. Neilson
Publisher: Springer Science & Business Media
ISBN: 146125826X
Category : Science
Languages : en
Pages : 640

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Estuaries are eternally enriched. Their positions at the foot of watersheds and their convenience as receiving bodies for the wastes of cites, towns and farms results in continuous addition of nutrients - those elements and compounds which are essential for organic production. Such materials must be added to these complex bodies of water to sustain production, since there is a net loss of water and its contents to the oceans. Enrichment from land and the ocean and the subsequent cycling of the original chemicals or their derivatives contribute to the extraordinarily high values of estuaries for human purposes. Many estuaries are able to assimilate large quantities of nutrients despite the great fluctuations which occur with variations in the flow from tributaries. The nutrients can be stored, incorporated in standing crops of plants, released, cycled and exported - and the system frequently achieves high production of plants and and animals without creation of any undesirable results of enrichment. Excessive enrichment with the same elements and compounds can, however, be highly detrimental to estuaries and their uses. Coastal cities are usually located on the estuaries which provided a harbor for the- and which now receive partially treated sewage and other wastes from the expanding population and industrial activity. Conversion of woodlands to agricultural use and the extensive application of fertilizers have resulted in the flow of large quantities of nutrients down the hill or slopes and eventually into the estuary.

Author: Brivaela Moriceau
Publisher: Frontiers Media SA
ISBN: 2832553788
Category : Science
Languages : en
Pages : 181

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This is the second issue of the Research Topic: Biogeochemistry and Genomics of Silicification and Silicifiers. The first issue article collection can be found here: https://www.frontiersin.org/research-topics/5364/biogeochemistry-and-genomics-of-silicification-and-silicifiers Silicifiers are among the most important living organisms of planet Earth. They are able to take advantage of the abundance of silicon in the Earth crust to build silicified architectures, which in particular can help for protection against predators or for facilitating the penetration of light and nutrients to the cells.

Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 498

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Author: Hervé Chamley
Publisher:
ISBN:
Category : Marine biology
Languages : en
Pages : 374

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Author:
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ISBN:
Category : Ocean engineering
Languages : en
Pages : 698

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Author:
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ISBN:
Category : Geology
Languages : en
Pages : 510

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