We ask whether dissolved organic nitrogen (DON) and phosphorus (DOP) could account for previously identified Arctic Ocean (AO) inorganic nutrient budget imbalances. We assess transports to/from the AO by calculating indicative budgets. Marked DON:DOP ratio differences between the Amerasian and Eurasian AO reflect different physical and biogeochemical pathways. DON and DOP are exported to the No...

The percentage of world shrimp production in Central America is only about 7% (Rosenberry, 1994), but the industry is important to local economies. In Honduras, over $70 million was generated by shrimp culture in 1994 placing the industry third in national export earnings. Sustainability of the industry is economically critical, and could depend on estuarine water quality. A 2-yr baseline of wa...

A system in balance? – Implications of deep vertical mixing for the nitrogen budget in the northern Red Sea, including the Gulf of Aqaba (Eilat) C. Häse, M. Al-Qutob, Z. Dubinsky, E. A. Ibrahim, B. Lazar, N. Stambler, and M. M. Tilzer ZMT Bremen, 28359 Bremen, Germany Department of Life Sciences, Bar Ilan University, Ramat Gan, Israel Department of Biology, Faculty of Science and Technology, Al...

of the nitrogen cycling has major consequences for other biogeochemical processes and ecosystem functions and services, Voss says. Recent research has uncovered an apparent imbalance in the nitrogen budget of the oceans, which isn’t completely understood yet and may point to additional processes that remain to be discovered. The traditional view that bacterial denitrification is the only signif...

Abstract In this study, a 2×3 factorial design  with two levels of  shrimp density (25 and 50 shrimp per m-2) and three  levels of   red algae density (0, 200 and 400g per m-2) was applied to calculate  nitrogen and phosphorous budgets in integrated culture of Litopenaeus vannamei with Gracilaria corticata  during 45 days under zero water exchange system. Juvenile of L.vannamei (5.82 ± 0.11 g...

The Eurasian basin of the Central Arctic Ocean is nitrogen limited, but little is known about the presence and role of nitrogen-fixing bacteria. Recent studies have indicated the occurrence of diazotrophs in Arctic coastal waters potentially of riverine origin. Here, we investigated the presence of diazotrophs in ice and surface waters of the Central Arctic Ocean in the summer of 2012. We ident...