Electronic Resource
Oxford, UK
:
Blackwell Publishing Ltd
Polar research
10 (1991), S. 0
ISSN:
1751-8369
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Geography
,
Geosciences
Notes:
Uptake rates of NH4+, NO3− and dissolved organic nitrogen (urea) were measured in phytoplankton and in ice algae in the Barents Sea using a 15N-technique. NO3− was the most important nitrogen source for the ice algae (f-ratio = 0.92). The in situ irradiances in the subsurface chlorophyll maximum and in the ice algal communities were low. The in situ NO3− uptake rate in the ice algal communities was light-limited The in situ NO3− and NH4− uptake rates in the subsurface chlorophyll maximum were at times light-limited. It is hypothesised that NH4+ may accumulate in low light in the bottom of the euphotic zone and inhibit the in situ NO3− uptake rate.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1751-8369.1991.tb00644.x
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