Carbon Dioxide and Methane Emissions from Mangrove-Associated Waters of the Andaman Islands, Bay of Bengal

Factors influencing spatio-temporal variation of methane and nitrous oxide emission from a tropical mangrove of eastern coast of India

“…The range of CH 4 emission (0.09e2.24 mg m À2 h À1 ) from the mangrove sediment during the sampling period was well within the reported range in previous studies in the mangrove ecosystem (Lyimo et al, 2002;Kreuzwieser et al, 2003;Purvaja et al, 2004;Lekphet et al, 2005; Barnes et al, 2006;Allen et al, 2007;Biswas et al, 2007;Dalal and Allen, 2008;Chen et al, 2012;Linto et al, 2014;Konnerup et al, 2014). Among the different seasons significantly higher CH 4 emission was recorded during winter season from the mangrove sediment.…”

“…Further, the direct measurement of CH 4 and N 2 O emission at tidal scale from mangrove ecosystem has been sparingly studied (Lu et al, 1999;Barnes et al, 2006;Allen et al, 2007). Most of the reported studies have estimated the CH 4 and N 2 O emission from mangroves through indirect flux measurement from dissolved GHG concentration gradient method (Mukhopadaya et al, 2001;Biswas et al, 2007;Divia et al, 2013;Linto et al, 2014). However, few studies have reported diurnal variation of CH 4 and N 2 O emission from mangrove measured through direct chamber method (Lu et al, 1999;Allen et al, 2007), but these studies did not cover the entire spectrum of variation of the tidal inundation of the sediment.…”

Spatial and temporal variability of CO2and CH4gas transfer velocities and quantification of the CH4microbubble flux in mangrove dominated estuaries

“…Borges et al () suggested a k 600 ‐CO 2 parameterization ( k 600 = 1.0 + 1.719 v 0.5 h −0.5 + 2.58 u ), also a function of wind speed, current velocity, and depth, derived from floating chamber deployments in the macro‐tidal estuary Scheldt. This parameterization has been used as a model for estimating k 600 in recent mangrove estuary CO 2 and CH 4 flux studies (Atkins et al ; Linto et al ; Call et al ). This model overestimated CO 2 (55%) and CH 4 (50%) emissions from our mangrove creek (Fig.…”

Understanding the Spatial Heterogeneity of CO2 and CH4 Fluxes from an Urban Shallow Lake: Correlations with Environmental Factors

“…Abril et al [77], however, found that suspended clays (high turbidity) in the estuarine turbidity maximum (ETM) area enhanced CH 4 oxidation and strongly reduced CH 4 fluxes to the atmosphere. Linto et al [78] reported that fourfold higher turbidity during the wet season is consistent with elevated net benthic and/or water column heterotrophy via enhanced organic matter inputs from adjacent mangrove forest and/or the flushing of CO 2 -enriched soil waters, which may explain these high emission data of CO 2 . A possible mechanism is that the increase of turbidity reduced the photosynthesis of aquatic plants and the reoxygenation capacity of water, thereby establishing an anaerobic reducing environment at the watersediment interface, which is conducive to the generation and emission of CH 4 .…”