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.
nieuwe zoekopdracht
Constraining nitrogen sources to a seagrass-dominated coastal embayment by using an isotope mass balance approach
Russell, D.G.; Kessler, A.J.; Wong, W.W.; van Oevelen, D.; Cook, P.L.M. (2022). Constraining nitrogen sources to a seagrass-dominated coastal embayment by using an isotope mass balance approach. Mar. Freshw. Res. 73(5): 703-709. https://dx.doi.org/10.1071/mf21320
In: Marine and Freshwater Research. CSIRO: East Melbourne. ISSN 1323-1650; e-ISSN 1448-6059, meer
|   |
| Trefwoorden |
|
| Author keywords |
15N; denitrification; isotope; nitrogen; nitrogen budget; nitrogen fixation; seagrass; tidal flat |
| Auteurs | | Top |
- Russell, D.G.
- Kessler, A.J.
- Wong, W.W.
|
- van Oevelen, D.
- Cook, P.L.M.
|
|
| Abstract |
Nitrogen (N) is often the key nutrient limiting primary production in coastal waters. Quantifying sources and sinks of N is therefore critical to understanding the factors that underpin the productivity of coastal ecosystems. Constraining nitrogen inputs can be difficult for some terms such as N fixation and marine exchange as a consequence of uncertainties associated with scaling and stochasticity. To help overcome these issues, we undertook a N budget incorporating an isotope and mass balance to constrain N sources in a large oligotrophic coastal embayment (Western Port, Australia). The total N input to Western Port was calculated to be 1400 Mg N year−1, which is remarkably consistent with previous estimates of sedimentation rates within the system. Catchment inputs, N fixation, marine sources and atmospheric deposition comprised 44, 28, 28 and 13% of N inputs respectively. Retention of marine-derived N equated to ~3 and ~10% of total N and NOx flushed through the system from the marine end-member. The relatively high contribution of N fixation compared with previous studies was most likely to be due to the high proportion of nutrient-limited intertidal sediments where N is mediated by seagrasses and sediment cyanobacteria. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
