## EM-Algorithm as a tool for structure analysis of stands of the common reed (Phragmites australis)

1991
Möller, Joachim
Journal article
##### Published in
Ecological Modelling ; 53 (1991), 1-2. - pp. 27-38. - ISSN 0304-3800
##### Abstract
The frequency distributions of morphometric and mechanical properties of randomly sampled stalks of seven reed stands at Lake Constance-Untersee are analysed by the Estimation-Maximisation Algorithm. The aim was to look for composed (bimodal) distribution indicating at least two different stem types. In each stand, between one and nine parameters are found to give a bimodal distribution. The two stem types are "flowering shoots" and "non-flowering shoots". The means of nearly all parameters investigated are different at the 1% level of significance. The flowerless shoots are identical with "secondary shoots" and the flowering shoots refer to terminal (= "primary") shoots. The separation of stem types allows investigation of the stand structure and the influence upon it by "rhizome-internal" and "external" factors in more detail.
##### Subject (DDC)
570 Biosciences, Biology
##### Keywords
Phragmites australis,Morphometry,Algorithm,Mechanical properties,Flowering,Gramineae,Monocotyledones,Angiospermae,Spermatophyta
##### Cite This
ISO 690OSTENDORP, Wolfgang, Joachim MÖLLER, 1991. EM-Algorithm as a tool for structure analysis of stands of the common reed (Phragmites australis). In: Ecological Modelling. 53(1-2), pp. 27-38. ISSN 0304-3800. Available under: doi: 10.1016/0304-3800(91)90139-R
BibTex
@article{Ostendorp1991EMAlg-8679,
year={1991},
doi={10.1016/0304-3800(91)90139-R},
title={EM-Algorithm as a tool for structure analysis of stands of the common reed (Phragmites australis)},
number={1-2},
volume={53},
issn={0304-3800},
journal={Ecological Modelling},
pages={27--38},
author={Ostendorp, Wolfgang and Möller, Joachim}
}

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