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Effects of water nutrients on regeneration capacity of submerged aquatic plant fragments

Published online by Cambridge University Press:  04 April 2014

Katharina Kuntz ,
Patrick Heidbüchel  and
Andreas Hussner
Katharina Kuntz
Affiliation:
Institute of Plant Biochemistry, Photosynthesis and stress physiology of plants, Heinrich-Heine-University of Düsseldorf, Universitätsstraße 1, D-40225 Düsseldorf, Germany
Patrick Heidbüchel
Affiliation:
Institute of Plant Biochemistry, Photosynthesis and stress physiology of plants, Heinrich-Heine-University of Düsseldorf, Universitätsstraße 1, D-40225 Düsseldorf, Germany
Andreas Hussner*
Affiliation:
Institute of Plant Biochemistry, Photosynthesis and stress physiology of plants, Heinrich-Heine-University of Düsseldorf, Universitätsstraße 1, D-40225 Düsseldorf, Germany
*
*Corresponding author: [email protected]
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Abstract

Aquatic plants play a substantial role in almost all freshwater habitats throughout the world. Even though submerged aquatic plants dominantly spread by the dispersal of vegetative plant fragments, most aquatic plant species show a broad distribution range. Here we studied the differences in the regeneration capacity and the regeneration type of fragments (by root and/or shoot growth) of eight submerged plant species (Ceratophyllum demersum, Egeria najas, Elodea canadensis, Elodea nuttallii, Hydrilla verticillata, Myriophyllum aquaticum, Myriophyllum heterophyllum and Myriophyllum spicatum) under different water nutrients in sediment-free conditions. Overall, M. spicatum showed the highest regeneration (82±2%) in this study, followed by C. demersum (73±2%) and M. aquaticum (47±4%), whereas M. heterophyllum showed the lowest (1±1%). The shoot fragments of E. canadensis, H. verticillata, E. najas and E. nuttallii regenerated by 40±2, 23±2, 16±2 and 7±1%. The nitrate concentration affected the regeneration capacities of E. najas (P=0.05), M. spicatum (P=0.013) and C. demersum (P=0.001), whereas phosphate had no significant effect. Additionally, the different nutrient concentrations had a significant effect on the portion of the regeneration types within E. canadensis, E. nuttallii and H. verticillata. Summarizing, submerged plants differ significantly in their regeneration capacity, and water nutrients have a potential effect on the regeneration of submerged plant fragments. This might influence the further colonization and spread of the species under field conditions.

Keywords

Colonizationregenerationdispersalspreadsubmerged macrophytes
Type
Research Article
Information
Annales de Limnologie - International Journal of Limnology , Volume 50 , Issue 2 , 2014 , pp. 155 - 162
Copyright
© EDP Sciences, 2014

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