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Effects of an organic sediment on performance of young Phragmites australis clones at different water depth treatments
Limnology, Lund University, Lund, Sweden .ORCID iD: 0000-0002-5181-0391
1996 (English)In: Hydrobiologia, ISSN 0018-8158, E-ISSN 1573-5117, Vol. 330, no 3, 189-194 p.Article in journal (Refereed) Published
Abstract [en]

Performance of young Phragmites australis plants was examined after 7 weeks on an artificial nutrient-enriched inorganic substrate and on the same substrate to which an organic sediment from a eutrophic lake was added, at three different water depth treatments. Growth decreased, and proportional allocation of biomass to roots increased, with the addition of sediment. These differences were significant in shallow and deep water, but not at a medium depth. Concentrations of phosphorus and nitrogen in plant biomass decreased, and concentration of iron increased, with addition of sediment. The effects of sediment addition may have resulted from a decreased availability of nutrients in the substrate or from an impaired root functioning. Nutrient exhaustion in the substrate, due to a fast plant growth, can explain the relatively strong effects in shallow water. Deep water, on the other hand, probably restricted oxygen transport to the roots, resulting in an impaired root functioning in the low-redox sediment environment. The results show that, especially in relatively deep water, growth of undisturbed plants of P. australis may be inhibited by eutrophication of sediments, probably because of an impaired root functioning in sediments containing reduced toxic compounds (e.g. ferrous iron).

Place, publisher, year, edition, pages
Dordrecht, Netherlands: Springer Netherlands, 1996. Vol. 330, no 3, 189-194 p.
National Category
Ecology
Identifiers
URN: urn:nbn:se:hh:diva-27661DOI: 10.1007/BF00024207ISI: A1996VP18400003Scopus ID: 2-s2.0-0029660718OAI: oai:DiVA.org:hh-27661DiVA: diva2:784962
Available from: 2015-02-01 Created: 2015-02-01 Last updated: 2015-02-02Bibliographically approved

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Citation style
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