[en] Although estuaries are considered important pathways in the global carbon cycle, carbon dynamics in tropical estuaries is relatively understudied. Here, the tidal, seasonal and spatial variability of particulate organic carbon (POC), dissolved inorganic carbon (DIC), carbon dioxide (CO2) and methane (CH4), among other biogeochemical variables related to carbon cycling, were studied in the Guayas river delta (Ecuador) to document the sources, processing and fluxes of these carbon forms. All variables were studied during a semi-diurnal (13 hour) tidal cycle and along river transects at low and high tides, all carried out during one dry and rainy season. POC and total suspended matter (TSM) strongly covaried and peaked at high tidal flow velocities during a tidal cycle and at high river discharge during the rainy season, suggesting that resuspension of bottom sediments and/or surface erosion in the river catchment were a dominant source of particulate matter in the water column. The δ13C of POC, (from ~-22‰ to ~-27‰) showed an increasing contribution of marine phytoplankton to the POC pool as moving downstream along the delta during the dry season. Upstream DIC concentrations (~1200 μmol L-1) were high in the Guayas river delta as compared to other tropical estuarine systems, and the δ13C of DIC revealed a shift from a more phytoplankton dominated source in the dry season and downstream (~-4‰) to a relatively more terrestrial source in the rainy season and upstream (~-12.5‰). Both DIC and its δ13C showed slight but consistent deviations from conservative mixing that hint at inputs of 13C depleted DIC from mineralization along the delta. High values of the partial pressure of CO2 (pCO2) observed upstream and in the rainy season (~5250 μatm), associated with O2 undersaturation (~60%) and low δ13CDIC, suggest a strongly heterotrophic system, and resulted in high CO2 efflux to the atmosphere. CH4 concentrations were also higher during the rainy than dry season (93.5±62.5 vs. 61.3±39.5 nmol L-1), but unlike pCO2, showed tidal variations similar to TSM and POC, thus alluding to potential CH4 release from sediments during resuspension events at high tidal flow velocities. This explorative survey revealed complex drivers and biogeochemical processes acting upon various spatio-temporal scales which are necessary to consider for a complete understanding of the carbon biogeochemistry in estuarine systems. Similar surveys on estuarine carbon in data scarce regions are encouraged to constrain uncertainties in coastal zone carbon budgets.
Research center :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Belliard, Jean-Philippe
Hernandez, Simon
Temmerman, Stijn
Suello, Rey Harvey
Dominguez-Granda, Luis E.
Rosado-Moncayo, Andrea M.
Ramos-Veliz, John A.
Parra-Narera, Rebeca N.
Ramirez, Karem P.
Govers, Gerard
Borges, Alberto ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Chemical Oceanography Unit (COU)
BOuillon, Steven
Language :
English
Title :
Carbon dynamics and CO2 and CH4 exchange in the mangrove dominated Guayas river delta, Ecuador
Abril, G., Nogueira, M., Etcheber, H., Cabeçadas, G., Lemaire, E., Brogueira, M.J., Behaviour of organic carbon in nine contrasting European estuaries. Estuar. Coast Shelf Sci. 54:2 (2002), 241–262, 10.1006/ecss.2001.0844.
Alongi, D.M., Carbon cycling and storage in mangrove forests. Ann. Rev. Mar. Sci 6:May (2014), 195–219, 10.1146/annurev-marine-010213-135020.
Alongi, D.M., Mukhopadhyay, S.K., Contribution of mangroves to coastal carbon cycling in low latitude seas. Agric. For. Meteorol. 213 (2015), 266–272, 10.1016/j.agrformet.2014.10.005.
Araujo, J., Naqvi, S.W.A., Naik, H., Naik, R., Biogeochemistry of methane in a tropical monsoonal estuarine system along the west coast of India. Estuar. Coast Shelf Sci. 207 (2018), 435–443, 10.1016/j.ecss.2017.07.016.
Arreaga Vargas, P., Analysis del comportamiento de la salinidad (intrusion salina) en el sistema Rio Guayas Canal de Jambeli como parte del cambio climatica. Acta Oceanográfico Del Pacifico, 10(1), 2000.
Bala Krishna Prasad, M., Probst, J.-L., Organic carbon transport and C/N ratio variations in a large tropical river: Godavari as a case study, India. Biogeochemistry 73:3 (2005), 457–473, 10.1007/s10533-004-0879-2.
Bala Krishna Prasad, M., Ramanathan, A.L., Organic matter characterization in a tropical estuarine-mangrove ecosystem of India: preliminary assessment by using stable isotopes and lignin phenols. Estuar. Coast Shelf Sci. 84:4 (2009), 617–624, 10.1016/j.ecss.2009.07.029.
Barboza, C.D.N., Paes, E.T., de Andrade Jandre, K., Marques, A.N., Concentrations and fluxes of nutrients and suspended organic matter in a tropical estuarine system: the Tinharé-Boipeba islands Archipelago (Baixo Sul Baiano, Brazil). J. Coast Res. 298 (2014), 1197–1209, 10.2112/jcoastres-d-12-00095.1.
Bardhan, P., Karapurkar, S.G., Shenoy, D.M., Kurian, S., Sarkar, A., Maya, M.V., Naik, H., Varik, S., Naqvi, S.W.A., Carbon and nitrogen isotopic composition of suspended particulate organic matter in Zuari Estuary, west coast of India. J. Mar. Syst. 141 (2015), 90–97, 10.1016/j.jmarsys.2014.07.009.
Barth, J.A.C., Cronin, A.A., Dunlop, J., Kalin, R.M., Influence of carbonates on the riverine carbon cycle in an anthropogenically dominated catchment basin: evidence from major elements and stable carbon isotopes in the Lagan River (N. Ireland). Chem. Geol. 200:3 (2003), 203–216, 10.1016/S0009-2541(03)00193-1.
Bauer, J.E., Cai, W.J., Raymond, P.A., Bianchi, T.S., Hopkinson, C.S., Regnier, P.A.G., The changing carbon cycle of the coastal ocean. Nature, 504, 2013, Nature Publishing Group, 61–70, 10.1038/nature12857 7478.
Belliard, J.-P., Dominguez-Granda, L.E., Ramos-Veliz, J.A., Rosado-Moncayo, A.M., Nath, J., Govers, G., Gourgue, O., Temmerman, S., El Niño driven extreme sea levels in an Eastern Pacific tropical river delta: landward amplification and shift from oceanic to fluvial forcing. Global Planet. Change, 203(May), 2021, 103529.
Beusen, A.H.W., Dekkers, A.L.M., Bouwman, A.F., Ludwig, W., Harrison, J., Estimation of global river transport of sediments and associated particulate C, N, and P. Global Biogeochem. Cycles, 19(4), 2005, 10.1029/2005GB002453.
Borbor-Cordova, M.J., Boyer, E.W., Mcdowell, W.H., Hall, C.A., Nitrogen and phosphorus budgets for a tropical watershed impacted by agricultural land use: Guayas, Ecuador. Biogeochemistry 79:1–2 (2006), 135–161, 10.1007/s10533-006-9009-7.
Bordovskiy, O.K., Sources of organic matter in marine basins. Mar. Geol. 3:1 (1965), 5–31, 10.1016/0025-3227(65)90003-4.
Borges, A.V., Do we have enough pieces of the jigsaw to integrate CO2 fluxes in the coastal ocean?. Estuaries 28:1 (2005), 3–27, 10.1007/BF02732750.
Borges, A.V., Abril, G., Carbon dioxide and methane dynamics in estuaries. Treatise on Estuarine and Coastal Science, 5, 2012, 10.1016/B978-0-12-374711-2.00504-0 Issue August 2018.
Borges, A.V., Abril, G., Bouillon, S., Carbon dynamics and CO2 and CH4 outgassing in the Mekong delta. Biogeosciences 15:4 (2018), 1093–1114, 10.5194/bg-15-1093-2018.
Borges, A.V., Delille, B., Schiettecatte, L.-S., Gazeau, F., Abril, G., Frankignoulle, M., Gas transfer velocities of CO2 in three European estuaries (Randers Fjord, Scheldt, and Thames). Limnol. Oceanogr. 49:5 (2004), 1630–1641, 10.4319/lo.2004.49.5.1630.
Bouillon, S., Borges, A.V., Castañeda-Moya, E., Diele, K., Dittmar, T., Duke, N.C., Kristensen, E., Lee, S.Y., Marchand, C., Middelburg, J.J., Rivera-Monroy, V.H., Smith, T.J. III, Twilley, R.R., Mangrove production and carbon sinks: a revision of global budget estimates. Global Biogeochem. Cycles, 22(2), 2008, 10.1029/2007GB003052.
Bouillon, S., Dehairs, F., Schiettecatte, L.-S., Borges, A.V., Biogeochemistry of the Tana estuary and delta (northern Kenya). Limnol. Oceanogr. 52:1 (2007), 46–59, 10.4319/lo.2007.52.1.0046.
Bouillon, S., Dehairs, F., Velimirov, B., Abril, G., Borges, A.V., Dynamics of organic and inorganic carbon across contiguous mangrove and seagrass systems (Gazi Bay, Kenya). J. Geophys. Res.: Biogeosciences, 112(2), 2007, 10.1029/2006JG000325.
Bouillon, S., Frankignoulle, M., Dehairs, F., Velimirov, B., Eiler, A., Abril, G., Etcheber, H., Borges, A.V., Inorganic and organic carbon biogeochemistry in the Gautami Godavari estuary (Andhra Pradesh, India) during pre-monsoon: the local impact of extensive mangrove forests. Global Biogeochem. Cycles, 17(4), 2003, 10.1029/2002GB002026 n/a-n/a.
Bouillon, S., Middelburg, J.J., Dehairs, F., Borges, A.V., Abril, G., Flindt, M.R., Ulomi, S., Kristensen, E., Importance of intertidal intertidal sediment processes and porewater exchange on the water column biogeochemistry in a pristine mangrove creek (Ras Dege, Tanzania). Biogeosciences 4:3 (2007), 311–322, 10.5194/bg-4-311-2007.
Caffrey, J.M., Factors Controlling Net Ecosystem Metabolism in U. S. Estuaries 27:1 (2004), 90–101.
Cai, W.-J., Guo, X., Chen, C.-T.A., Dai, M., Zhang, L., Zhai, W., Lohrenz, S.E., Yin, K., Harrison, P.J., Wang, Y., A comparative overview of weathering intensity and HCO3− flux in the world's major rivers with emphasis on the Changjiang, Huanghe, Zhujiang (Pearl) and Mississippi Rivers. Continent. Shelf Res. 28:12 (2008), 1538–1549, 10.1016/j.csr.2007.10.014.
Call, M., Sanders, C.J., Macklin, P.A., Santos, I.R., Maher, D.T., Carbon outwelling and emissions from two contrasting mangrove creeks during the monsoon storm season in Palau, Micronesia. Estuar. Coast Shelf Sci. 218 (2019), 340–348, 10.1016/j.ecss.2019.01.002.
Cifuentes, L.A., Coffin, R.B., Solorzano, L., Cardenas, W., Espinoza, J., Twilley, R.R., Isotopic and elemental variations of carbon and nitrogen in a mangrove estuary. Estuar. Coast Shelf Sci. 43:6 (1996), 781–800, 10.1006/ecss.1996.0103.
Cloern, J.E., Foster, S.Q., Kleckner, A.E., Phytoplankton primary production in the world's estuarine-coastal ecosystems. Biogeosciences 11:9 (2014), 2477–2501, 10.5194/bg-11-2477-2014.
Cole, J.J., Cole, J.J., Caraco, N.F., Caraco, N.F., Carbon in catchments: connecting terrestrial carbon losses with aquatic metabolism. Mar. Freshw. Res. 52:1 (2001), 101–110, 10.1071/MF00084.
Cole, J.J., Prairie, Y.T., Caraco, N.F., McDowell, W.H., Tranvik, L.J., Striegl, R.G., Duarte, C.M., Kortelainen, P., Downing, J.A., Middelburg, J.J., Melack, J., Plumbing the global carbon cycle: integrating inland waters into the terrestrial carbon budget. Ecosystems 10:1 (2007), 171–184, 10.1007/s10021-006-9013-8.
Couto, T., Duarte, B., Caçador, I., Baeta, A., Marques, J.C., Salt marsh plants carbon storage in a temperate Atlantic estuary illustrated by a stable isotopic analysis based approach. Ecol. Indicat. 32 (2013), 305–311, 10.1016/j.ecolind.2013.04.004.
Damanik-Ambarita, M.N., Boets, P., Nguyen Thi, H.T., Forio, M.A.E., Everaert, G., Lock, K., Musonge, P.L.S., Suhareva, N., Bennetsen, E., Gobeyn, S., Ho, T.L., Dominguez-Granda, L., Goethals, P.L.M., Impact assessment of local land use on ecological water quality of the Guayas river basin (Ecuador). Ecol. Inf. 48 (2018), 226–237, 10.1016/j.ecoinf.2018.08.009.
Deknock, A., De Troyer, N., Houbraken, M., Dominguez-Granda, L., Nolivos, I., Van Echelpoel, W., Forio, M.A.E., Spanoghe, P., Goethals, P.L.M., Distribution of agricultural pesticides in the freshwater environment of the Guayas river basin (Ecuador). Sci. Total Environ. 646 (2019), 996–1008, 10.1016/j.scitotenv.2018.07.185.
Doi, T., Osafune, S., Sugiura, N., Kouketsu, S., Murata, A., Masuda, S., Toyoda, T., Multidecadal change in the dissolved inorganic carbon in a long-term ocean state estimation. J. Adv. Model. Earth Syst. 7:4 (2015), 1885–1900, 10.1002/2015MS000462.
Donato, D.C., Kauffman, J.B., Murdiyarso, D., Kurnianto, S., Stidham, M., Kanninen, M., Mangroves among the most carbon-rich forests in the tropics. Nat. Geosci. 4:5 (2011), 293–297, 10.1038/ngeo1123.
Gattuso, J.-P., Frankignoulle, M., Wollast, R., Carbon and carbonate metabolism IN coastal aquatic ecosystems. Annu. Rev. Ecol. Systemat. 29:1 (1998), 405–434, 10.1146/annurev.ecolsys.29.1.405.
Guo, W., Ye, F., Xu, S., Jia, G., Seasonal variation in sources and processing of particulate organic carbon in the Pearl River estuary, South China. Estuar. Coast Shelf Sci. 167 (2015), 540–548, 10.1016/j.ecss.2015.11.004.
Guo, X., Cai, W.-J., Zhai, W., Dai, M., Wang, Y., Chen, B., Seasonal variations in the inorganic carbon system in the Pearl River (Zhujiang) estuary. Continent. Shelf Res. 28:12 (2008), 1424–1434, 10.1016/j.csr.2007.07.011.
Hamlington, B.D., Cheon, S.H., Thompson, P.R., Merrifield, M.A., Nerem, R.S., Leben, R.R., Kim, K.Y., An ongoing shift in Pacific Ocean sea level. J. Geophys. Res.: Oceans 121:7 (2016), 5084–5097, 10.1002/2016JC011815.
He, S., Xu, Y.J., Freshwater-saltwater mixing effects on dissolved carbon and CO2 outgassing of a coastal river entering the northern Gulf of Mexico. Estuar. Coast 41:3 (2018), 734–750, 10.1007/s12237-017-0320-4.
Hoffman, J.C., Bronk, D.A., Interannual variation in stable carbon and nitrogen isotope biogeochemistry of the Mattaponi River, Virginia. Limnol. Oceanogr. 51:5 (2006), 2319–2332, 10.4319/lo.2006.51.5.2319.
ICEX, Estudios de mercados. El mercado de pesca y acuacultura en Ecuador 2019 (ICEX Espana Exportacion e Inversiones, 2019.
INOCAR, Precipiation en Guayaquil. 2019 https://www.inocar.mil.ec/web/index.php/precipitacion-en-guayaquil.
Ittekkot, V., Zhang, S., Pattern of particulate nitrogen transport in world rivers. Global Biogeochem. Cycles 3:4 (1989), 383–391, 10.1029/GB003i004p00383.
Jeffrey, L.C., Maher, D.T., Santos, I.R., Call, M., Reading, M.J., Holloway, C., Tait, D.R., The spatial and temporal drivers of pCO2, pCH4 and gas transfer velocity within a subtropical estuary. Estuar. Coast Shelf Sci. 208 (2018), 83–95, 10.1016/j.ecss.2018.04.022.
Knittel, K., Boetius, A., Anaerobic Oxidation of Methane: Progress with an Unknown Process, vol. 63, 2009, 311–334, 10.1146/annurev.micro.61.080706.093130.
Krishna, M.S., Viswanadham, R., Prasad, M.H.K., Kumari, V.R., Sarma, V.V.S.S., Export fluxes of dissolved inorganic carbon to the northern Indian Ocean from the Indian monsoonal rivers. Biogeosciences 16:2 (2019), 505–519, 10.5194/bg-16-505-2019.
Lewis, E.R., Wallace, D.W.R., Program Developed for CO2 System Calculations. 1998, 10.15485/1464255.
Li, M., Peng, C., Wang, M., Xue, W., Zhang, K., Wang, K., Shi, G., Zhu, Q., The carbon flux of global rivers: a re-evaluation of amount and spatial patterns. Ecol. Indicat. 80 (2017), 40–51, 10.1016/J.ECOLIND.2017.04.049.
Li, S.-L., Liu, C.-Q., Li, J., Lang, Y.-C., Ding, H., Li, L., Geochemistry of dissolved inorganic carbon and carbonate weathering in a small typical karstic catchment of Southwest China: isotopic and chemical constraints. Chem. Geol. 277:3 (2010), 301–309, 10.1016/j.chemgeo.2010.08.013.
Ludwig, W., Probst, J.-L., Kempe, S., Predicting the oceanic input of organic carbon by continental erosion. Global Biogeochem. Cycles 10:1 (1996), 23–41, 10.1029/95GB02925.
Ludwig, W., Suchet, P.A., Probst, J.-L., River discharges of carbon to the world's oceans: determining local inputs of alkalinity and of dissolved and particulate organic carbon. Sciences de La Terre et Des Planètes (Comptes Rendus de l'Académie Des Sciences), vol. 323, 1996, 1007–1014 https://oatao.univ-toulouse.fr/3498/.
Maher, D.T., Call, M., Santos, I.R., Sanders, C.J., Beyond burial: lateral exchange is a significant atmospheric carbon sink in mangrove forests. Biol. Lett., 14(7), 2018, 10.1098/rsbl.2018.0200.
Maher, D.T., Santos, I.R., Golsby-Smith, L., Gleeson, J., Eyre, B.D., Groundwater-derived dissolved inorganic and organic carbon exports from a mangrove tidal creek: the missing mangrove carbon sink?. Limnol. Oceanogr. 58:2 (2013), 475–488, 10.4319/lo.2013.58.2.0475.
Meybeck, M., Carbon, nitrogen, and phosphorus transport by world rivers. Am. J. Sci., 282(4), 1982, 401, 10.2475/ajs.282.4.401 LP – 450.
Middelburg, J.J., Nieuwenhuize, J., Carbon and nitrogen stable isotopes in suspended matter and sediments from the Schelde Estuary. Mar. Chem. 60:3–4 (1998), 217–225, 10.1016/S0304-4203(97)00104-7.
Middelburg, J.J., Nieuwenhuize, J., Iversen, N., Høgh, N., de Wilde, H., Helder, W., Seifert, R., Christof, O., Methane distribution in European tidal estuaries. Biogeochemistry 59:1 (2002), 95–119, 10.1023/A:1015515130419.
Mook, W.G., Tan, T.C., Stable carbon isotopes in rivers and estuaries. Degens, E.T., Al, E., (eds.) Biogeochemistry of Major World Rivers, 1991, John Wiley, 245–264.
Mouw, C.B., Barnett, A., McKinley, G.A., Gloege, L., Pilcher, D., Global ocean particulate organic carbon flux merged with satellite parameters. Earth Syst. Sci. Data 8:2 (2016), 531–541, 10.5194/essd-8-531-2016.
Müller, P.J., CN ratios in Pacific deep-sea sediments: effect of inorganic ammonium and organic nitrogen compounds sorbed by clays. Geochem. Cosmochim. Acta 41:6 (1977), 765–776, 10.1016/0016-7037(77)90047-3.
Otero, E., Culp, R., Noakes, J.E., Hodson, R.E., Allocation of particulate organic carbon from different sources in two contrasting estuaries of southeastern U.S.A. Limnol. Oceanogr. 45:8 (2000), 1753–1763, 10.4319/lo.2000.45.8.1753.
Ouyang, X., Lee, S.Y., Improved estimates on global carbon stock and carbon pools in tidal wetlands. Nat. Commun., 11(1), 2020, 10.1038/s41467-019-14120-2.
Probst, J.-L., Mortatti, J., Tardy, Y., Carbon river fluxes and weathering CO2 consumption in the Congo and Amazon river basins. Appl. Geochem. 9:1 (1994), 1–13, 10.1016/0883-2927(94)90047-7.
Raymond, P.A., Cole, J.J., Gas Exchange in Rivers and Estuaries: Choosing a Gas Transfer Velocity. Estuaries 24:2 (2001), 312–317, 10.2307/1352954.
Regnier, P.A.G., Friedlingstein, P., Ciais, P., Mackenzie, F.T., Gruber, N., Janssens, I.A., Laruelle, G.G., Lauerwald, R., Luyssaert, S., Andersson, A.J., Arndt, S., Arnosti, C., Borges, A.V., Dale, A.W., Gallego-Sala, A., Goddéris, Y., Goossens, N., Hartmann, J., Heinze, C., Thullner, M., Anthropogenic perturbation of the carbon fluxes from land to ocean. Nat. Geosci. 6:8 (2013), 597–607, 10.1038/ngeo1830.
Rhee, T.S., Kettle, A.J., Andreae, M.O., Methane and nitrous oxide emissions from the ocean: A reassessment using basin-wide observations in the Atlantic. J. Geophys. Res. Atmos., 114(D12), 2009, 12304, 10.1029/2008JD011662.
Rosentreter, J.A., Borges, A.V., Deemer, B.R., Holgerson, M.A., Liu, S., Song, C., Melack, J., Raymond, P.A., Duarte, C.M., Allen, G.H., Olefeldt, D., Poulter, B., Battin, T.I., Eyre, B.D., Half of global methane emissions come from highly variable aquatic ecosystem sources. Nat. Geosci. 14:4 (2021), 225–230, 10.1038/s41561-021-00715-2.
Rosentreter, J.A., Maher, D.T., Erler, D.V., Murray, R.H., Eyre, B.D., Seasonal and temporal CO2 dynamics in three tropical mangrove creeks – A revision of global mangrove CO2 emissions. Geochem. Cosmochim. Acta 222:February (2018), 729–745, 10.1016/j.gca.2017.11.026.
Rovai, A.S., Twilley, R.R., Castañeda-Moya, E., Riul, P., Cifuentes-Jara, M., Manrow-Villalobos, M., Horta, P.A., Simonassi, J.C., Fonseca, A.L., Pagliosa, P.R., Global controls on carbon storage in mangrove soils. Nat. Clim. Change 8:6 (2018), 534–538, 10.1038/s41558-018-0162-5.
Sadat-Noori, M., Maher, D.T., Santos, I.R., Groundwater Discharge as a Source of Dissolved Carbon and Greenhouse Gases in a Subtropical Estuary. Estuar. Coast 39:3 (2016), 639–656, 10.1007/s12237-015-0042-4.
Santos, I.R., Maher, D.T., Larkin, R., Webb, J.R., Sanders, C.J., Carbon outwelling and outgassing vs. burial in an estuarine tidal creek surrounded by mangrove and saltmarsh wetlands. Limnol. Oceanogr. 64:3 (2019), 996–1013, 10.1002/lno.11090.
Saumik, S., Dalai, T.K., Pattanaik, J.K., Rai, S.K., Mazumdar, A., Dissolved inorganic carbon (DIC) and its δ13C in the Ganga (Hooghly) River estuary, India: Evidence of DIC generation via organic carbon degradation and carbonate dissolution. Geochem. Cosmochim. Acta 165 (2015), 226–248, 10.1016/j.gca.2015.05.040.
Sippo, J.Z., Maher, D.T., Tait, D.R., Holloway, C., Santos, I.R., Are mangroves drivers or buffers of coastal acidification? Insights from alkalinity and dissolved inorganic carbon export estimates across a latitudinal transect. Global Biogeochem. Cycles 30 (2016), 753–766, 10.1002/2015GB005324.
Smith, B.N., Epstein, S., Two Categories of 13C/12C Ratios for Higher Plants. Plant Physiol., 47(3), 1971, 380, 10.1104/pp.47.3.380 LP – 384.
Syvitski, J.P.M., Vörösmarty, C.J., Kettner, A.J., Green, P., Impact of Humans on the Flux of Terrestrial Sediment to the Global Coastal Ocean. 2005, 10.1126/science.1109454.
Taillardat, P., Willemsen, P.W.J.M., Marchand, C., Friess, D.A., Widory, D., Baudron, P., Truong, V.V., Nguyễn, T.N., Ziegler, A.D., Assessing the contribution of porewater discharge in carbon export and CO2 evasion in a mangrove tidal creek (Can Gio, Vietnam). J. Hydrol. 563 (2018), 303–318, 10.1016/j.jhydrol.2018.05.042.
Tue, N.T., Quy, T.D., Hamaoka, H., Nhuan, M.T., Omori, K., Sources and Exchange of Particulate Organic Matter in an Estuarine Mangrove Ecosystem of Xuan Thuy National Park, Vietnam. Estuar. Coast 35:4 (2012), 1060–1068, 10.1007/s12237-012-9487-x.
Twilley, R.R., Cardenas, W., Rivera-Monroy, V.H., Espinoza, J., Suescum, R., Armijos, M.M., Solorzano, L., The Gulf of Guayaquil and the Guayas River Estuary Ecuador. Coastal Marine Ecosystems of Latin America, 2001.
Twilley, R.R., Pozo, M., Garcia, V.H., Rivera-Monroy, V.H., Zambrano, R., Bodero, A., Litter dynamics in riverine mangrove forests in the Guayas River estuary, Ecuador. Oecologia 111:1 (1997), 109–122, 10.1007/s004420050214.
Twilley, R.R., Gottfried, R., Rivera-Monroy, V.H., Zhang, W., Montaño Armijos, M., Bodero, A., Gottfried, R.R., Zang, W., Armijos, M.M., An approach and preliminary model of integrating ecological and economic constraints of environmental quality in the Guayas River estuary, Ecuador. Environ. Sci. Pol. 1:4 (1998), 271–288, 10.1016/S1462-9011(98)00012-4.
Vitousek, S., Barnard, P.L., Fletcher, C.H., Frazer, N., Erikson, L., Storlazzi, C.D., Doubling of coastal flooding frequency within decades due to sea-level rise. Sci. Rep. 7:1 (2017), 1–9, 10.1038/s41598-017-01362-7.
Wit, F., Rixen, T., Baum, A., Pranowo, W.S., Hutahaean, A.A., The Invisible Carbon Footprint as a hidden impact of peatland degradation inducing marine carbonate dissolution in Sumatra, Indonesia. Sci. Rep., 8(1), 2018, 17403, 10.1038/s41598-018-35769-7.
Wu, Y., Zhang, J., Liu, S.M., Zhang, Z.F., Yao, Q.Z., Hong, G.H., Cooper, L., Sources and distribution of carbon within the Yangtze River system. Estuar. Coast Shelf Sci. 71:1 (2007), 13–25, 10.1016/j.ecss.2006.08.016.
Yamamoto, S., Alcauskas, J.B., Crozier, T.E., Solubility of methane in distilled water and seawater. J. Chem. Eng. Data 21:1 (1976), 78–80, 10.1021/je60068a029.
Zapata, C., Puente, A., García, A., García-Alba, J., Espinoza, J., The Use of Hydrodynamic Models in the Determination of the Chart Datum Shape in a Tropical Estuary. Water, 11(5), 2019, 902, 10.3390/W11050902.