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Flooding tolerance and horizontal expansion of wetland plants: facilitation by floating mats?
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och geovetenskap.
2014 (Engelska)Ingår i: Aquatic Botany, ISSN 0304-3770, E-ISSN 1879-1522, Vol. 113, s. 83-89Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Water level fluctuations (WLF) can be important disturbances promoting the diversity of riparian plant communities, but are currently absent from many managed aquatic ecosystems. A lack of WLF is thought to reduce plant diversity and hamper hydrosere succession. However, a positive impact of WLF on plant diversity may crucially depend on nutrient availability and the presence of a potential ecosystem engineer, the floating plant Strati otes abides, that may provide structural support to riparian plants. We tested the interactive effects of 40 cm flooding, presence of S. abides and sediment nutrient availability (N and P) on growth and horizontal expansion of eight wetland plant species in a 10 week experiment. Seven out of eight species showed a significant elongation response to flooding. Compared to stagnant water levels, flooding in combination with high nutrient availability decreased horizontal expansion in two short species and increased it in two tall species, whereas flooding decreased horizontal expansion in two other short species under both nutrient levels. In this 10 week experiment, we observed no effect of S. abides on the measured plant parameters. This experiment shows short-term negative effects of flooding on most of the short species. On the long-term, we hypothesize that improvements in water quality and seedling recruitment due to drawdown may result in net positive effects of WLF in the riparian zone, but as the species that were rare in the field happened to be short, care should be taken to maintain rare species when allowing more WLF.

(C) 2013 Elsevier B.V. All rights reserved.

Ort, förlag, år, upplaga, sidor
2014. Vol. 113, s. 83-89
Nationell ämneskategori
Ekologi Oceanografi, hydrologi och vattenresurser
Identifikatorer
URN: urn:nbn:se:umu:diva-87163DOI: 10.1016/j.aquabot.2013.11.003ISI: 000331499700009Scopus ID: 2-s2.0-84890834844OAI: oai:DiVA.org:umu-87163DiVA, id: diva2:710835
Tillgänglig från: 2014-04-08 Skapad: 2014-03-24 Senast uppdaterad: 2023-03-23Bibliografiskt granskad

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Sarneel, Judith M

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Aquatic Botany
EkologiOceanografi, hydrologi och vattenresurser

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