Seasonal changes in the contents of nutrients in five macrophyte species from the lake Velenjsko jezero (Slovenia)

Authors

  • Zdenka Mazej
  • Matej Germ

DOI:

https://doi.org/10.14720/abs.51.1.15221

Keywords:

lake, total nitrogen, total phosphorus, Nuphar luteum (L.) Sibth et Sm., Najas marina L., Najas minor All., Potamogeton lucens L. and Potamogeton pectinatus L.

Abstract

The study was designed to depict the seasonal dynamic in relative abundance of macrophyte species, nutrient availability and their content in macrophytes to assess the capability of different species to store nutrients in nutrient rich lake Velenjsko jezero. The concentrations of total nitrogen and total phosphorus in the lake sediment, water and aboveground biomass of macrophytes (Nuphar luteum, Najas marina, Najas minor, Potamogeton lucens andPotamogeton pectinatus) were measured at three locations monthly from June to September 2004. Seasonal variability in the contents of total phosphorus in macrophyte tissues was high, but all examined species reached similar maximal concentration in the beginning of their growth. Later in the season, concentrations declined to a high degree. Seasonal variability in the contents of total nitrogen was smaller. Floating-leaved species Nuphar luteum was present in a low amounts and contained much more total nitrogen in its above-ground tissues than the submersed species. Because of different species lifespans, differences in the content of nutrients among species were very high in particular month. Nuphar luteum, Najas minor and Potamogeton lucens were rarely present in the lake and they contributed less to storing nutrients in their biomass. Potamogeton pectinatus was commonly present in the early summer, but in August Najas marina prevailed by far and its growth had high effect on the concentration of nutrients in sediment and water. Thereforenremoving of 1 t dry weight of Najas marina biomass from the lake would contribute to removal of 2.7 kg of phosphorus and 28.2 kg of nitrogen from the lake.

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Published

01.07.2008

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Original Research Paper

How to Cite

Mazej, Z., & Germ, M. (2008). Seasonal changes in the contents of nutrients in five macrophyte species from the lake Velenjsko jezero (Slovenia). Acta Biologica Slovenica, 51(1), 3-11. https://doi.org/10.14720/abs.51.1.15221

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