Potential denitrification in wetland sediments with different plant species detritus

Kallner Bastviken, SofiaLinköpings universitet,Ekologi,Tekniska högskolan (författare)

The effect of detritus originating from different plant species on denitrifying capacity was investigated in a Swedish wastewater treatment wetland. Intact sediment cores containing sediment with a detritus layer were collected from wetland basins dominated by Typha latifolia, Phragmites australis, or Elodea canadensis in November 2000 and potential denitrification was measured using the acetylene-inhibition method. The cores from stands of E. canadensis showed more than three times higher denitrification capacity than the cores of the other plants. Bacterial abundance per unit dry weight was both highest and lowest in the detritus of R australis, whereas the C/N ratio was lower in the cores of E. canadensis. This suggests that the submerged plant provided more organic material of high quality to support heterotrophic organisms. It is also possible that the surfaces of E. canadensis offered more or more suitable surfaces for bacterial growth and thereby increased the bacterial population. It is apparent that denitrifying bacteria were more favored by E. canadensis detritus than by detritus from the emergent plant species at the time of sampling. Since the turnover of plant detritus varies considerably among species, the seasonal variation in denitrification capacity is likely to be quite different for different plants.

NATURVETENSKAP Geovetenskap och miljövetenskap Miljövetenskap hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Environmental Sciences hsv//eng
NATURVETENSKAP Biologi Ekologi hsv//swe
NATURAL SCIENCES Biological Sciences Ecology hsv//eng
detritus
constructed wetland
potential denitrification
macrophytes
cold climate
Constructed wetland; Potential denitrification; Detritus; Macrophytes; Cold climate
NATURAL SCIENCES

Eriksson, PederLund University,Lunds universitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Department of Biology,Faculty of Science,Department of Limnology, Lund University, Lund, Sweden(Swepub:lu)lim-per (författare)
Premrov, ALinköpings universitet,Institutionen för fysik, kemi och biologi,Tekniska högskolan (författare)
Tonderski (Sundblad), KarinLinköpings universitet,Ekologi,Tekniska högskolan(Swepub:liu)karsu52 (författare)
Linköpings universitetEkologi (creator_code:org_t)

Ingår i:Ecological Engineering: the Journal of Ecotechnology: Elsevier BV25:2, s. 183-1901872-6992
Ingår i:Ecological Engineering: Elsevier BV25:2, s. 183-1900925-8574

Av författaren/redakt...: Kallner Bastvike ...; Eriksson, Peder; Premrov, A; Tonderski (Sundb ...

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