Seasonal nitrogen dynamics in reed beds (Phragmites australis (Cav.) Trin. ex. Steudel) in relation to productivity

Shoot biomass and nitrogen, accumulated within above-ground plant biomass in autumn, correlate with nitrogen availability indicated by nitrogen content (% DM) of several shoot parts during the height of the growth period. A higher nitrogen percentage of the shoots is correlated with a higher shoot l...

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Bibliographic Details
Published in:Hydrobiologia 1993-02, Vol.251 (1-3), p.1-12
Main Authors: KÜHL, H, KOHL, J.-G
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Biological and medical sciences
Fresh water ecosystems
Freshwater
Fundamental and applied biological sciences. Psychology
Phragmites australis
Synecology
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Summary:Shoot biomass and nitrogen, accumulated within above-ground plant biomass in autumn, correlate with nitrogen availability indicated by nitrogen content (% DM) of several shoot parts during the height of the growth period. A higher nitrogen percentage of the shoots is correlated with a higher shoot loss and subsequent substitution by branching and tillering during and continuing toward the end of the growth period. A delayed switch from the vegetative to the generative phase reduces the translocation of reserve material to the rhizome. Increasing nitrogen load is at least one of the factors causing instability and reed-belt decline.
ISSN:0018-8158
1573-5117
DOI:10.1007/BF00007158