Catalogus

Zoeken

Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.

Boekenmand

Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).

RSS

Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.

log in

Publicaties | Kaarten

nieuwe zoekopdracht

[ meld een fout in dit record ]

mandje (0): toevoegen | toon

---

Carbon and nitrogen cycling on intertidal mudflats of a temperate Australian estuary: 4. Inverse model analysis and synthesis Cook, P.L.M.; van Oevelen, D.; Soetaert, K.; Middelburg, J.J. (2009). Carbon and nitrogen cycling on intertidal mudflats of a temperate Australian estuary: 4. Inverse model analysis and synthesis. Mar. Ecol. Prog. Ser. 394: 35-48. http://dx.doi.org/10.3354/meps08270 In: Marine Ecology Progress Series. Inter-Research: Oldendorf/Luhe. ISSN 0171-8630; e-ISSN 1616-1599, meer

---

Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 156309 [ download pdf ]

---

Trefwoorden

Aquatic communities > Benthos > Phytobenthos Chemical reactions > Nitrogen fixation Cycles > Chemical cycles > Geochemical cycle > Biogeochemical cycle > Nutrient cycles > Carbon cycle Cycles > Chemical cycles > Geochemical cycle > Biogeochemical cycle > Nutrient cycles > Nitrogen cycle Organic matter PSE, Australia, Tasmania Sediments Stoichiometry Topographic features > Landforms > Coastal landforms > Tidal flats Marien/Kust; Brak water

Author keywords

Nitrogen; Carbon; Sediment; Microphytobenthos; Stoichiometry; Inversemodel

---

Auteurs		Top
Cook, P.L.M. van Oevelen, D. Soetaert, K. Middelburg, J.J.

---

Abstract

Microphytobenthos (MPB) are recognised as exerting an important controlling influence over C and N flows in euphotic sediments; however, the coupling between these flows remains poorly studied. We undertook an inverse model analysis of C and N fluxes through the microbial compartment on intertidal flats in a temperate estuary. The analysis showed that the trophic balance of the sediment exerted a strong influence on the relative fluxes of C and N through the sediment microbial community. Under increasingly autotrophic conditions (production:respiration >1), the assimilation of C relative to N rose above the cellular C:N ratio of MPB, resulting in increased excretion rates of organic matter by MPB. The C:N ratio of the organic matter excreted was also highly variable, ranging from ~20 (mol:mol) under heterotrophic conditions, and increasing to >50 under autotrophic conditions. The relative fluxes of C and N through bacteria were also significantly affected by the trophic balance of the sediment and the ratio of C:N mineralized by bacteria was significantly higher under autotrophic conditions. Dissolved organic N release by bacteria and uptake by MPB also predominated over inorganic N forms under autotrophic conditions. We conclude that C and N fluxes through shallow euphotic sediments may become significantly decoupled and well above the commonly assumed Redfield ratio and measured cellular C:N ratios of MPB.

---

Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid

Top | Auteurs