| Titre : | Biogeochemical cycling and sediment ecology |
| Auteurs : | John S. Gay, Auteur |
| Type de document : | texte imprimé |
| Editeur : | LONDON; DORTRICHT;BOSTON : Kluwer academic publishers, 1999 |
| ISBN/ISSN/EAN : | 978-0-7923-5770-4 |
| Format : | 235p. / couv.en.coul. / 24cm. |
| Langues: | Français |
| Index. décimale : | 551.46 (Géologie sous-marine, hydrosphère, océanographie (eau de mer, études et explorations des grands fonds, hydrographie, hydrographie marine, océanographie physique, ouvrages généraux sur l'hydrologie et l'océanographie ; ouvrages interdisciplinaires sur les mers, les océans, les sciences de la mer ; réserves naturelles en eau, topographie sous-marine) ) |
| Catégories : |
Jeunesse > Nature et environnement > Protéger l'environnement |
| Mots-clés: | the marine ; oceans |
| Résumé : |
Oceanographic discontinuities (e. g. frontal systems, upwelling areas, ice edges) are often areas of enhanced biological productivity. Considerable research on the physics and biology of the physical boundaries defining these discontinues has been accomplished (see [I D. The interface between water and sediment is the largest physical boundary in the ocean, but has not received a proportionate degree of attention. The purpose of the Nato Advanced Research Workshop (ARW) was to focus on soft-sediment systems by identifying deficiencies in our knowledge of these systems and defining key issues in the management of coastal sedimentary habitats. Marine sediments play important roles in the marine ecosystem and the biosphere. They provide food and habitat for many marine organisms, some of which are commercially important. More importantly from a global perspective, marine sediments also provide "ecosystem goods and services" [2J. Organic matter from primary production in the water column and contaminants scavenged by particles accumulate in sediments where their fate is determined by sediment processes such as bioturbation and biogeochemical cycling. Nutrients are regenerated and contaminants degraded in sediments. Under some conditions, carbon accumulates in coastal and shelf sediments and may by removed from the carbon cycle for millions of years, having a potentially significant impact on global climate change. Sediments also protect coasts. The economic value of services provided by coastal areas has recently been estimated to be on the order of $12,568 9 10 y" [3J, far in excess of the global GNP. |
Exemplaires (1)
| Code-barres | Cote | Support | Localisation | Section | Disponibilité |
|---|---|---|---|---|---|
| 180236 | 07-10-471 | Livre | Bibliothèque SNV | Magasin Biologie | Libre accès Disponible |
Aucun avis, veuillez vous identifier pour ajouter le vôtre !
Accueil
