ISSN:
1573-5117
Keywords:
North Brittany sediments
;
microphytobenthos
;
nitrogen nutrients
;
pore water
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The annual variations of chloropigments (‘Chl. a’ and phaeopigments) concentrations at two reference stations — a subtidal sand in the Morlaix Bay and a subtidal sandy mud in the ‘Rade de Brest’ (France) — are discussed. Analysis of correspondance elucidates the relations between the evolution of the microphytobenthic communities and the nitrogen nutrients in the interstitial water in the top layer of the sediments. The springblooms, for the two stations, are directly related to the decrease of nitrogen (NH4 and NO3), whereas during summer the results are more complex: competition and inhibitions between microphytes and bacteria are obvious. The obtained in situ results are compared with previously published culture experiments with axenic benthic microphytes, which showed selective absorption of nitrogen compounds.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00006110
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