Effect of plant species on gas production and emission in a newly constructed wetland
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The Ohio State University / OhioLINK
2003
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=osu1409230229 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-osu14092302292021-08-03T06:27:26Z Effect of plant species on gas production and emission in a newly constructed wetland Smialek, Jamie Lynn Environmental Science <p>The objective of this research was to determine the effect that herbaceous and woody plant species have on CO2 and CH4 production and emission, and on denitrification. Plants affect these processes by importing oxygen to their roots, contributing organic matter to the sediment, and acting as conduits for gas escape into the atmosphere. The research was conducted on a constructed treatment wetland at Waterman Farm on the Columbus campus of Ohio State University, from May - November, 2002. In plots left unplanted or planted with woody (Salix spp.) or herbaceous (Juncus effusus) species (n=15 per treatment), we estimated concentrations of CO2 and CH4 in the sediment, emissions of CO2 and CH4 from the sediment and through the plants, and denitrification rates. We found a significant difference in CH4 concentration in the sediment at 15 cm depth for the year between Salix and Juncus (1590 ppm and 263 ppm, respectively), but not the control (420 ppm). In November, CO2 concentrations were highest for Juncus (1414 ppm), which were significantly different from the control (740 ppm), but not from Salix (923 ppm). These differences did not correspond to differences in emissions through the sediment or plants. Fluxes of CH4 through the plants were negative during evening samplings, and positive during morning sampling. No differences in denitrification rates were found between the treatments. The lack of significant differences were likely attributable to low sediment carbon accumulation. The young system (established in June 2001) may not have adequate carbon to allow for significant rates of decomposition. This hypothesis is supported by the lack of significant differences between the planted treatments and the control. Significant differences between gas concentrations in the sediment did not occur until November, after a full growing season. Juncus appeared to have introduced the most O2 into the sediment, as evidenced by the low CH4 and high CO2 concentrations. Salix and Juncus displayed diurnal gas emission patterns, indicating they both use pressurized flow-through transport. In the evening, when gases appear to have moved through the plants along a concentration gradient, CH4 fluxes were negative.</p> 2003 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1409230229 http://rave.ohiolink.edu/etdc/view?acc_num=osu1409230229 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Environmental Science |
| spellingShingle |
Environmental Science Smialek, Jamie Lynn Effect of plant species on gas production and emission in a newly constructed wetland |
| author |
Smialek, Jamie Lynn |
| author_facet |
Smialek, Jamie Lynn |
| author_sort |
Smialek, Jamie Lynn |
| title |
Effect of plant species on gas production and emission in a newly constructed wetland |
| title_short |
Effect of plant species on gas production and emission in a newly constructed wetland |
| title_full |
Effect of plant species on gas production and emission in a newly constructed wetland |
| title_fullStr |
Effect of plant species on gas production and emission in a newly constructed wetland |
| title_full_unstemmed |
Effect of plant species on gas production and emission in a newly constructed wetland |
| title_sort |
effect of plant species on gas production and emission in a newly constructed wetland |
| publisher |
The Ohio State University / OhioLINK |
| publishDate |
2003 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=osu1409230229 |
| work_keys_str_mv |
AT smialekjamielynn effectofplantspeciesongasproductionandemissioninanewlyconstructedwetland |
| _version_ |
1719437222166396928 |