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Strategies of nitrogen cycling of Phragmites australis at two sites differing in nutrient availability
Author(s) -
Kühl Harald,
Woitke Peter,
Kohl JohannesGünter
Publication year - 1997
Publication title -
internationale revue der gesamten hydrobiologie und hydrographie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 0020-9309
DOI - 10.1002/iroh.19970820108
Subject(s) - phragmites , nutrient , rhizome , nitrogen , biomass (ecology) , nutrient cycle , standing crop , agronomy , nitrogen cycle , cycling , assimilation (phonology) , botany , productivity , biology , environmental science , ecology , chemistry , wetland , linguistics , philosophy , macroeconomics , organic chemistry , economics , history , archaeology
Below‐ground biomass and nitrogen content were determined at two genetically homogeneous Phragmites stands differing in morphology, in productivity, and in nutrient supply. Comparable ratios between above‐ground standing crop and rhizome biomass were found at both sites, whereas the root biomass/above standing crop ratio was significantly higher at the nutrient poor site. Investigations on the dynamics of nitrogen content revealed distinct differences in nitrogen translocation to the rhizomes between the investigated clones indicating two ecophysiological strategies in storage behaviour. These two strategies could be attached to the “assimilation type” and to the “translocation type”, respectively. A modified definition of both types is presented.