Organic carbon accumulation and metabolic pathways in sediments of mangrove forests in southern Thailand

Alongi, Daniel M.; Wattayakorn, Gullaya; Pfitzner, J.; Tirendi, Frank; Zagorskis, Irena; Brunskill, G. J.; Davidson, Andrew T.; Clough, Barry

doi:10.1016/s0025-3227(01)00195-5

Cited by 188 publications

(117 citation statements)

References 29 publications

Supporting

Mentioning

104

Contrasting

Unclassified

Order By: Relevance

“…Alongi et al (2001) showed that benthic respiration in mangrove ecosystems was more dependent upon allochthonous organic matter inputs rather than aboveground primary production, in agreement with benthic bacteria isotopic signatures (Bouillon et al, 2004;Bouillon and Boschker, 2006). This is also in agreement with recent findings by Bouillon et al (2007a) in the mangrove dominated Tana estuary in Kenya that showed that water column particulate and dissolved organic matter were dominated by inputs from the non-mangrove drainage basin rather than from mangrove derived material.…”

Section: Spatial and Seasonal Variations Of Dic And Ancillary Datasupporting

confidence: 90%

“…Generally, sulphate reduction and aerobic respiration are the main pathways of organic matter degradation in mangrove sediments (Alongi et al, 2001). For instance, aerobic respiration accounted for 63e94% of total benthic organic carbon decomposition in Rhizophora apiculata plantations of the Mekong delta (Alongi et al, 2000a), while sulphate reduction represented 74% of benthic organic carbon decomposition in Western Australia mangroves (Alongi, 1998).…”

Section: Spatial and Seasonal Variations Of Dic And Ancillary Datamentioning

confidence: 99%

See 1 more Smart Citation

Dissolved inorganic carbon dynamics in the waters surrounding forested mangroves of the Ca Mau Province (Vietnam)

Koné

Borges

2008

Estuarine, Coastal and Shelf Science

View full text Add to dashboard Cite

Dissolved inorganic carbon (DIC) and ancillary data were obtained during the dry and rainy seasons in the waters surrounding two 10-yearold forested mangrove sites (Tam Giang and Kiên Vàng) located in the Ca Mau Province (South-West Vietnam). During both seasons, the spatial variations of partial pressure of CO 2 (pCO 2 ) were marked, with values ranging from 704 ppm to 11481 ppm during the dry season, and from 1209 ppm to 8136 ppm during the rainy season. During both seasons, DIC, pCO 2 , total alkalinity (TAlk) and oxygen saturation levels (%O 2 ) were correlated with salinity in the mangrove creeks suggesting that a combination of lower water volume and longer residence time (leading to an increase in salinity due to evaporation) enhanced the enrichment in DIC, pCO 2 and TAlk, and an impoverishment in O 2 . The low O 2 and high DIC and pCO 2 values suggest that heterotrophic processes in the water column and sediments controlled these variables. The latter processes were meaningful since the high DIC and TAlk values in the creek waters were related to some extent to the influx of pore waters, consistent with previous observations. This was confirmed by the stochiometric relationship between TAlk and DIC that shows that anaerobic processes control these variables, although this approach did not allow identifying unambiguously the dominant diagenetic carbon degradation pathway. During the rainy season, dilution led to significant decreases of salinity, TAlk and DIC in both mangrove creeks and adjacent main channels. In the Kiên Vàng mangrove creeks a distinct increase of pCO 2 and decrease of %O 2 were observed. The increase of TSM suggested enhanced inputs of organic matter probably from land surrounding the mangrove creeks, that could have led to higher benthic and water column heterotrophy. However, the flushing of water enriched in dissolved CO 2 originating from soil respiration and impoverished in O 2 could also have explained to some extent the patterns observed during the rainy season. Seasonal variations of pCO 2 were more pronounced in the Kiên Vàng mangrove creeks than in the Tam Giang mangrove creeks. The airewater CO 2 fluxes were 5 times higher during the rainy season than during the dry season in the Kiên Vàng mangrove creeks. In the Tam Giang mangrove creeks, the airewater CO 2 fluxes were similar during both seasons. The airewater CO 2 fluxes ranged from 27.1 mmol C m À2 d À1 to 141.5 mmol C m À2 d À1 during the dry season, and from 81.3 mmol m À2 d À1 to 154.7 mmol m À2 d À1 during the rainy season. These values are within the range of values previously reported in other mangrove creeks and confirm that the emission of CO 2 from waters surrounding mangrove forests are meaningful for the carbon budgets of mangrove forests.

show abstract

Section: Spatial and Seasonal Variations Of Dic And Ancillary Datasupporting

confidence: 90%

Section: Spatial and Seasonal Variations Of Dic And Ancillary Datamentioning

confidence: 99%

Dissolved inorganic carbon dynamics in the waters surrounding forested mangroves of the Ca Mau Province (Vietnam)

Koné

Borges

2008

Estuarine, Coastal and Shelf Science

View full text Add to dashboard Cite

show abstract

“…We observed that porewater salinity was highest both in the mangrove sediments and adjacent sandflats, indicating that mangrove influence on environmental parameters may extend beyond the mangrove forest boundary into adjacent non-vegetated sandflats. Organic carbon and nitrogen content vary among native mangrove forests; our results fall within ranges reported from Rhizophora apiculata mangrove stands in Thailand (Alongi et al 2001), but were lower compared to native mangroves in Micronesia (Gleason & Ewel 2002) (Schrijvers et al 1995), a range comparable to our results. Sediment particle size in 2 other mangrove forests in Pearl Harbor, Hawaii, were composed of primarily fine grained sediments whereas sandflat sediments in Paiko Lagoon, Hawaii, were mostly sand, indicating that mangrove sediments in Hawaii are generally composed of fine-grained sediments.…”

Section: Invasive Plant Influence On Sediments and Faunasupporting

confidence: 89%

Invasive mangroves alter macrofaunal community structure and facilitate opportunistic exotics

Demopoulos¹,

Smith²

2010

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Mangroves were introduced to the Hawaiian Islands in 1902, providing an unusual opportunity to examine the impacts of introduced vascular plants on coastal ecosystems. Despite >100 yr residence in Hawaii, little is known regarding how mangroves alter coastal ecosystem structure. We conducted a case study of 2 Rhizophora mangle habitats in Hawaii, comparing habitat parameters and macrofaunal community structure in introduced mangroves and nearby control sandflats at a similar tidal elevation. Mangrove sediments had finer sediments and higher organic carbon concentrations and porewater salinities than sandflats. Emergent mangrove roots were colonized by the introduced barnacles Chthamalus proteus, Balanus reticulatus, and B. amphitrite and the introduced sponges Suberites zeteki, Sigmadocia caerulea, and Gelloides fibrosa. Higher densities of non-native macrofauna were found in mangrove transects than in sandflat controls, indicating that invasive mangroves facilitate the persistence of non-native fauna in Hawaii. Mangrove habitats also had higher macrofaunal species richness and diversity, as well as greater dominance by subsurface deposit feeders. Introduced mangroves substantially altered benthic community structure, in part by enhancing the structural complexity of the Hawaiian coastal environment. Because macrobenthos provide a variety of ecosystem services, e.g. serving as prey for fish and birds and promoting detrital decomposition, mangrove-induced changes in sediment community composition will likely have farreaching consequences in Hawaii. Similar consequences of mangrove invasion are likely in other regions, as mangrove habitats expand with climate warming and increased coastal sedimentation. KEY WORDS: Ecosystem modification · Mangrove · Rhizophora mangle · Benthos · Plant invasion · Non-native species · Hawaii Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 404: [51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66][67] 2010 bal scale (Callaway & Josselyn 1992, Ruiz et al. 1997, including in tropical and subtropical habitats (Allen 1998, Chen et al. 2008. Prior to mangrove introduction, Hawaii essentially lacked marine vascular plants (Wester 1981), despite the availability of suitable habitats (Egler 1942). Vascular plants can alter wetland habitat characteristics and faunal community structure through a variety of direct and indirect mechanisms, acting as major ecosystem engineers (Orth 1977, Orth et al. 1991, Jones et al. 1997, Crooks 2002. Introduced Rhizophora mangle is likely to act as a major ecosystem engineer in the Hawaiian intertidal, causing increased availability of hard substrata for encrusting organisms, higher porewater salinities, and reduced light levels and rates of water flow (e.g. Alongi 1987a, Shokita et al. 1989, Levin & Talley 2000, Whitcraft & Levin 2007. By reducing water flow, the root structure traps fine and organic-rich sediments transported by currents or produced in situ from mangrove litter (Chapman...

show abstract

“…Anthropogenic activities (e.g., eutrophication) have the potential to increase (e.g., nitrogen fertilizers) or reduce (e.g., organic amendments from agricultural practices like straw incorporation) the extent of nutrient limitation for bacterial groups in coastal and terrestrial environment [27,28], potentially affecting organic matter mineralization through changes in microbial activity and plant-microbial interactions [24,29,30]. In mangroves, evidence suggests that anthropogenic activities (e.g., fertilization, deforestation) may negatively impact the ecosystem with a reduction of carbon burial or by the release to the atmosphere of organic carbon stored in sediments [31][32][33][34][35]. Persistent fertilization with nitrogen or phosphorus in mangroves has been shown to enhance tree growth, nutrient foliar content, tree mortality, and acidification in sediments, as well as affecting plant-microbe interactions [5][6][7]15,28,33,35].…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic Diversity of Diazotrophs along an Experimental Nutrient Gradient in Mangrove Sediments

Romero

Jacobson-Meyers

Fuhrman

et al. 2015

JMSE

View full text Add to dashboard Cite

Abstract:The diversity of diazotrophs was studied in the sediment of mangrove forests (Twin Cays, Belize) subjected to a long-term fertilization with nitrogen and phosphorus. Terminal Restriction Fragment Length Polymorphism (TRFLP) and cloning of PCR-amplified nifH genes were combined via in silico analysis to assign clones to TRFLP-nifH phylotypes, as well as to characterize the occurrence of phylotypes in response to environmental conditions. Results indicated that mangrove sediments from Belize harbor a unique diazotrophic community with a low metabolic diversity dominated by sulfate reducers. The variability of potential nitrogen-fixing sulfate reducers was explained by several environmental parameters, primarily by the abundance of dead roots in the sediments, and the concentration of H2S in the pore-waters. This study describes the complexity of microbial communities within the mangrove sediments with specific functional groups varying along environmental gradients.

show abstract

Organic carbon accumulation and metabolic pathways in sediments of mangrove forests in southern Thailand

Cited by 188 publications

References 29 publications

Dissolved inorganic carbon dynamics in the waters surrounding forested mangroves of the Ca Mau Province (Vietnam)

Dissolved inorganic carbon dynamics in the waters surrounding forested mangroves of the Ca Mau Province (Vietnam)

Invasive mangroves alter macrofaunal community structure and facilitate opportunistic exotics

Phylogenetic Diversity of Diazotrophs along an Experimental Nutrient Gradient in Mangrove Sediments

Contact Info

Product

Resources

About