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Article

Water Level Fluctuations and Air Temperatures Affect Common Reed Habitus and Productivity in an Intermittent Wetland Ecosystem

Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, SI-1000 Ljubljana, Slovenia
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Water 2020, 12(10), 2806; https://doi.org/10.3390/w12102806
Received: 30 August 2020 / Revised: 1 October 2020 / Accepted: 6 October 2020 / Published: 10 October 2020
(This article belongs to the Special Issue Hydrology-Shaped Plant Communities: Diversity and Ecological Function)
Lake Cerknica is an intermittent wetland ecosystem with extreme water level fluctuations. It hosts extensive reed stands that have colonized different habitat types. Two different stands were compared: a lake stand not directly influenced by the intermittent River Stržen and a riparian stand near River Stržen. Reed productivity (growth and assimilate allocation) was monitored for these reed stand types over 13 years (2007–2019), and this measurement was compared to monthly water levels and air temperatures. Reeds from the lake reed stand were significantly shorter with a lower shoot density, overall biomass production, and ratio of flowering plants. A correlation analysis revealed stronger and more numerous significant correlations between environmental and reed productivity parameters for the lake reed stand compared to the riparian reed stand. The variabilities of the growth and assimilate allocation parameters in the lake reed stand were both mostly explained by the combined water levels for June and July, which explained 47% and 52% of the variability, respectively. The most influential temperatures were in May, which explained 29% and 19% of the variability of growth and assimilate allocation parameters, respectively. For the riparian reed stand, water levels and temperatures out of the vegetation season appeared more important. Therefore, habitats with permanent water are more suitable for reeds than those with fluctuating water. However, fluctuating water conditions are expected to become more common due to climate change. View Full-Text
Keywords: Phragmites australis; water level fluctuations; temperature; morphometric parameters; biomass allocation Phragmites australis; water level fluctuations; temperature; morphometric parameters; biomass allocation
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MDPI and ACS Style

Gaberščik, A.; Grašič, M.; Abram, D.; Zelnik, I. Water Level Fluctuations and Air Temperatures Affect Common Reed Habitus and Productivity in an Intermittent Wetland Ecosystem. Water 2020, 12, 2806. https://doi.org/10.3390/w12102806

AMA Style

Gaberščik A, Grašič M, Abram D, Zelnik I. Water Level Fluctuations and Air Temperatures Affect Common Reed Habitus and Productivity in an Intermittent Wetland Ecosystem. Water. 2020; 12(10):2806. https://doi.org/10.3390/w12102806

Chicago/Turabian Style

Gaberščik, Alenka; Grašič, Mateja; Abram, Dragan; Zelnik, Igor. 2020. "Water Level Fluctuations and Air Temperatures Affect Common Reed Habitus and Productivity in an Intermittent Wetland Ecosystem" Water 12, no. 10: 2806. https://doi.org/10.3390/w12102806

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