Assessment of Methane Variability from Natural Wetlands of Uttar Pradesh, India-Implications for Tropical Countries
Tropical wetlands are one of the most dynamic natural sources of atmospheric methane (CH sub( 4)) but the CH sub( 4) emission data is still scanty to quantify and elaborate the process of CH sub( 4) emissions from natural freshwater tropical wetlands. In view of this, the present study attempts to e...
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| Veröffentlicht in: | Research journal of environmental sciences 2015-03, Vol.9 (3), p.101-118 |
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| creator | Bansal, Sangeeta Chakrabort, Monojit Katyal, Deeksha Garg, J.K. |
| description | Tropical wetlands are one of the most dynamic natural sources of atmospheric methane (CH sub( 4)) but the CH sub( 4) emission data is still scanty to quantify and elaborate the process of CH sub( 4) emissions from natural freshwater tropical wetlands. In view of this, the present study attempts to estimate the CH sub( 4) emissions from two natural tropical wetlands of Uttar Pradesh, India to further augment the CH sub( 4) emission database for tropical countries for improved understanding of CH sub( 4) cycling in tropical wetlands. This study elucidates the importance of temporal, site specific and zone-wise dependence of CH sub( 4) emission in a wetland. Significantly higher CH sub( 4) flux in the summer season than monsoon and winter season at both the locations (p |
| doi_str_mv | 10.3923/rjes.2015.101.118 |
| format | Article |
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In view of this, the present study attempts to estimate the CH sub( 4) emissions from two natural tropical wetlands of Uttar Pradesh, India to further augment the CH sub( 4) emission database for tropical countries for improved understanding of CH sub( 4) cycling in tropical wetlands. This study elucidates the importance of temporal, site specific and zone-wise dependence of CH sub( 4) emission in a wetland. Significantly higher CH sub( 4) flux in the summer season than monsoon and winter season at both the locations (p<0.05 for shallow water, deep water and exposed wetland soil zone) clearly define the importance of temperature, water depth, dissolved oxygen, redox potential, biological oxygen demand and plant biomass in regulating the seasonal CH sub( 4) flux. Spatial analysis revealed that higher mean annual CH sub( 4) flux from the Nawabganj lake (153.5 plus or minus 23.2 mg m super( -2) day super( -1)) as compared to the Keetham lake (80.0 plus or minus 11.8 mg m super( -2) day super( -1)), is attributed to enhanced anoxic conditions at Nawabganj lake owing to shallow, static and shrinking water base, high plant mediated CH sub( 4) flux and boosted autochthonous organic matter production by dense aquatic vegetation present in the lake chiefly including Eleocharis dulcis, Nelumbo nucifera, Ipomoea aquatica. Zone-wise, shallow water zone contributes maximum to CH sub( 4) flux than deep water and exposed wetland soil zones at both the sites due to high biological oxygen demand, heavy vegetation infestation and decreased values for water depth, dissolved oxygen and redox potential.</description><identifier>ISSN: 1819-3412</identifier><identifier>DOI: 10.3923/rjes.2015.101.118</identifier><language>eng</language><subject>Eleocharis dulcis ; Ipomoea aquatica ; Nelumbo nucifera</subject><ispartof>Research journal of environmental sciences, 2015-03, Vol.9 (3), p.101-118</ispartof><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c1668-79abb12fd0fbb0e8a9f9a875c91fc1dc1b3559b5a4e82bc87fb05017847d81253</citedby><cites>FETCH-LOGICAL-c1668-79abb12fd0fbb0e8a9f9a875c91fc1dc1b3559b5a4e82bc87fb05017847d81253</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,4110,27901,27902</link.rule.ids></links><search><creatorcontrib>Bansal, Sangeeta</creatorcontrib><creatorcontrib>Chakrabort, Monojit</creatorcontrib><creatorcontrib>Katyal, Deeksha</creatorcontrib><creatorcontrib>Garg, J.K.</creatorcontrib><title>Assessment of Methane Variability from Natural Wetlands of Uttar Pradesh, India-Implications for Tropical Countries</title><title>Research journal of environmental sciences</title><description>Tropical wetlands are one of the most dynamic natural sources of atmospheric methane (CH sub( 4)) but the CH sub( 4) emission data is still scanty to quantify and elaborate the process of CH sub( 4) emissions from natural freshwater tropical wetlands. In view of this, the present study attempts to estimate the CH sub( 4) emissions from two natural tropical wetlands of Uttar Pradesh, India to further augment the CH sub( 4) emission database for tropical countries for improved understanding of CH sub( 4) cycling in tropical wetlands. This study elucidates the importance of temporal, site specific and zone-wise dependence of CH sub( 4) emission in a wetland. Significantly higher CH sub( 4) flux in the summer season than monsoon and winter season at both the locations (p<0.05 for shallow water, deep water and exposed wetland soil zone) clearly define the importance of temperature, water depth, dissolved oxygen, redox potential, biological oxygen demand and plant biomass in regulating the seasonal CH sub( 4) flux. Spatial analysis revealed that higher mean annual CH sub( 4) flux from the Nawabganj lake (153.5 plus or minus 23.2 mg m super( -2) day super( -1)) as compared to the Keetham lake (80.0 plus or minus 11.8 mg m super( -2) day super( -1)), is attributed to enhanced anoxic conditions at Nawabganj lake owing to shallow, static and shrinking water base, high plant mediated CH sub( 4) flux and boosted autochthonous organic matter production by dense aquatic vegetation present in the lake chiefly including Eleocharis dulcis, Nelumbo nucifera, Ipomoea aquatica. 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Spatial analysis revealed that higher mean annual CH sub( 4) flux from the Nawabganj lake (153.5 plus or minus 23.2 mg m super( -2) day super( -1)) as compared to the Keetham lake (80.0 plus or minus 11.8 mg m super( -2) day super( -1)), is attributed to enhanced anoxic conditions at Nawabganj lake owing to shallow, static and shrinking water base, high plant mediated CH sub( 4) flux and boosted autochthonous organic matter production by dense aquatic vegetation present in the lake chiefly including Eleocharis dulcis, Nelumbo nucifera, Ipomoea aquatica. Zone-wise, shallow water zone contributes maximum to CH sub( 4) flux than deep water and exposed wetland soil zones at both the sites due to high biological oxygen demand, heavy vegetation infestation and decreased values for water depth, dissolved oxygen and redox potential.</abstract><doi>10.3923/rjes.2015.101.118</doi><tpages>18</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Research journal of environmental sciences, 2015-03, Vol.9 (3), p.101-118 |
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| language | eng |
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| source | EZB-FREE-00999 freely available EZB journals; Free Full-Text Journals in Chemistry; Science Alert |
| subjects | Eleocharis dulcis Ipomoea aquatica Nelumbo nucifera |
| title | Assessment of Methane Variability from Natural Wetlands of Uttar Pradesh, India-Implications for Tropical Countries |
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