Sources and dynamics of sedimentary organic matter in Sundarban mangrove estuary from Indo-Gangetic delta
Tóm tắt
Mangrove forests are highly productive ecosystems distributed along the tropical coast line. Nutrient biogeochemistry of mangroves are primarly driven by both allochthonous and autochthonous sources. Characterization of organic matter in coastal ecosystems enables to understand the biogeochemical transformation of organic matter and its influence on ecosystem productivity in response to various changing environmental conditions. Therefore, the elemental and stable carbon and nitrogen levels were employed to understand the organic matter (OM) dynamics in the Sundarban mangrove ecosystem (India-Bangladesh). Differences in stable isotope values indicate that variable sources influence the OM dynamics in Sundarban sediments. The progressive enrichment in δ 13C levels along the land-coastal continuum indicates that the terrestrial and marine inputs are dominant at the landward and seaward ends, respectively. The CuO oxidation-derived lignin phenol monomers describe significant levels of total lignin are preserved in Sundarban mangrove sediments during diagenesis. The phenol monomer ratios are lower than the plant litter explaining that aromatic ring cleavage is the dominant mechanism for the lignin degradation. Furthermore, the Ad/Al ratios were higher than the plant litter explaining the oxidation of propyl side chain of vascular OM influencing the carbon cycling in Sundarban sediments. Largely, the Ad/Al ratios describe the vascular OM degradation is through the oxidation of propyl side chain. The regional variability in land-use regulates the spatial variability in C, N, OC/TN ratio, δ 13C and δ 15N between the Indian and the Bangladesh Sundarban mangroves and indicates that in the upstream terrestrial organic matter and/or mangrove plant litter contribute significant amount of organic matter, whereas the marine POC influences the organic matter dynamics in downstream. The three end-member mixing model applying terrestrial plant litter, seston, and marine POC as end-members explains the relative contribution of OM from various sources, and marine inputs were dominant in Sundarban sediments.
Tài liệu tham khảo
Andrews JE, Greenaway AM, Dennis PF (1998) Combined carbon isotope and C/Nratios as indicators of source and fate of organicmatter in a poorly flushed, tropical estuary: Hunts Bay, Kingston Harbour, Jamaica. Estuar Coast Shelf Sci 46:743–756
Baneerjee K, Chowdhury MR, Sengupta K, Mitra A (2012) Influence of anthropogenic and natural factors on the mangrove soil of Indian Sundarbans wetland. Arch Environ Sci 6:80–91
Banerjee K, Senthilkumar B, Purvaja R, Ramesh R (2012) Sedimentation and trace metal distribution in selected locations of Sundarbans mangroves and Hooghly estuary, northeast coast of India. Environ Geochem Health 34(1):27–42
Biswas H, Mukhopadhyay SK, De TK, Sen S, Jana TK (2004) Biogenic controls on the air-water carbon dioxide exchange in the Sundarban mangrove environment, northeast coast of Bay of Bengal, India. Limnol Oceanogr 49(1):95–101
Bose S (2006) Mangrove forests in Sunderbans active delta - ecolog-ical disaster and remedies. http://archive.riversymposium.com/2005/index.php?element=12.
Bouillon S, Dahdouh-Guebas F, Rao AVVS, Koedam N, Dehairs F (2003) Sources of organic carbon in mangrove sediments: variability and possible ecological implications. Hydrobiologia 495:33–39
Deines P (1980) The isotopic composition of reduced organic carbon. In: Fritz P, Fontes JC (eds) Handbook of Environmental Isotope Geochemistry, vol 1, The Terrestrial Environment. A. Elsevier, Amsterdam, pp 329–406
Dittmar T, Lara RJ (2001) Driving forces behind nutrient and organic matter dynamics in a mangrove tidal creek in North Brazil. Estuar Coast Shelf Sci 52:249–259
Dittmar T, Lara RJ, Kattner G (2001) River or mangrove? Tracing major organic matter sources in tropical Brazilian coastal waters. Mar Chem 73:253–271
Dittmar T, Hertkorn N, Kattner G, Lara RJ (2006) Mangroves, a major source of dissolved organic carbon to the oceans. Global Biogeochem Cyc 20:GBS1012
Erwin KL (2009) Wetlands and global climate change: the role of wetland restoration in a changing world. Wetland Ecol Mgmt 17(1):71–84
Goñi MA, Yunker MB, Macdonald RW, Eglinton TI (2000) The supply and preservation of organic biomarkers in arctic sediments from the Mackenzie River and Beaufort Shelf. Mar Chem 71:23–51
Goñi M, Teixeira M, Perkey D (2003) Sources and distribution of organic matter in a river-dominated estuary (Winyah Bay, SC, USA). Estuar Coast Shelf Sci 57:1023–1048
Gonneea ME, Paytan A, Herrera-Silveira JE (2004) Tracing organic matter sources and carbon burial in mangrove sediments over the past 160 years. Estuar Coast Shelf Sci 61:211–227
Gopal B, Chauhan M (2006) Biodiversity and its conservation in the Sundarban mangrove ecosystem. Aquat Sci 68:338–354
Groffman PM, Bohlen PJ (1999) Soil and sediment biodiversity: cross-system comparisons and large-scale effects. Bioscience 49(2):139–148
He B, Dai M, Huang W, Liu Q, Chen H, Xu L (2010) Sources and accumulation of organic carbon in the Pearl River Estuary surface sediment as indicated by elemental, stable carbon isotopic, and carbohydrate compositions. Biogeosciences 7:3343–3362
Hedges JI, Ertel JR (1982) Characterization of lignin by gas capillary chromatography of cupric oxide oxidation products. Anal Chem 54:174–178
Hedges JI, Keil RG, Benner R (1997) What happens to terrestrial organic matter in the ocean? Org Geochem 27:195–212
Hicks C (2007) Sediment organic carbon pools and sources in a recently constructed mangrove and seagrass ecosystem. MS dissertation, University of Florida.
Jennerjahn TC (2012) Biogeochemical response of tropical coastal systems to present and past environmental change. Earth Sci Rev 114:19–41
Kirk TK, Higuchi T, Chang HM (1980) Lignin biodegradation: microbiology, chemistry and potential applications. CRC Press Inc., Boca Raton
Kristensen E, Bouillon S, Dittmar T, Marchand C (2008) Organic matter dynamics in mangrove ecosystems. Aquat Bot 89:201–219
Lamb AL, Wilson GP, Leng MJ (2006) A review of coastal palaeoclimate and relative sea-level reconstructions using δ13C and C/N ratios in organic material. Earth-Sci Rev 75:29–57
Lobbes JM, Fitznar HP, Kattner G (1999) High-performance liquid chromatography of lignin-derived phenols in environmental samples with diode detection. Anal Chem 71:3008–3012
Loh PS, Reeves AD, Harvey SM, Overnell J, Miller AEJ (2008) The fate of terrestrial organic matter in two Scottish sea lochs. Estuar Coast Shelf Sci 76:566–579
Loh PS, Chen C-T, Anshari GZ, Wang JT, Lou JY, Wang SL (2012) A comprehensive survey of lignin geochemistry in the sedimentary organic matter along the Kapuas River (West Kalimantan, Indonesia). J Asian Earth Sci 43:118–129
Mandal RN, Das CS, Naskar KR (2012) Dwindling Indian Sundarban mangrove: the way out. Sci Cul 76(7-8):275–282
Meyers PA, Arnaboldi M (2008) Paleoceanographic implications of nitrogen and organic carbon isotopic excursions in mid-Pleistocene sapropels from the Tyrrhenian and Levantine Basins, Mediterranean Sea. Palaeogeogr Palaeoclimatol Palaeoecol 266:112–118
Miltner A, Emeis KC (2001) Terrestrial organic matter in surface sediments of the Baltic Sea, NW Europe, as determined by CuO oxidation. Geochim Cosmochim Acta 65(8):1285–1299
Mitra A, Gangopadhyay A, Dube A, Schmidt ACK, Banerjee K (2009) Observed changes in water mass properties in the Indian Sundarbans (northwestern Bay of Bengal) during 1980–2007. Cur Sci 97(10):1445–1452
Muzuka ANN, Shunula JP (2006) Stable isotope compositions of organic carbon and nitrogen of two mangrove stands along the Tanzanian coastal zone. Estuar Coast Shelf Sci 66:447–458
Prahl FG, De Lange GT, Scholten S, Cowie GL (1997) A case of post-depositional aerobic degradation of terrestrial organic matter in turbidite deposits from the Madeira Abyssal Plain. Org Geochem 27:141–152
Prasad MBK, Ramanathan AL (2008) Sedimentary nutrient dynamics in a tropical estuarine mangrove ecosystem. Estuar Coast Shelf Sci 80:60–66
Prasad MBK, Ramanathan AL (2009) 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):617–624
Prasad MBK, Dittmar T, Ramanathan AL (2010) Organic matter and mangrove productivity. In: Ramanathan AL, Bhattacharya P, Dittmar T, Prasad MBK, Nepaune B (eds) Management and Sustainable Development of the Coastal Zone Environments. Springer, New Delhi, pp 175-193
Prasad MBK, Kaushal SS, Murtugudde R (2013) Long-term pCO2 dynamics in rivers in the Chesapeake Bay watershed. Appl Geochem 31:209–215
Preston T, Owens NJP (1983) Interfacing an automatic elemental analyser with an isotope ratio mass spectrometer: the potential for fully automated total nitrogen and nitrogen-15 analysis. Analyst 108:971–977
Ranjan RK, Routh J, Ramanathan AL, Val Klump J (2011) Elemental and stable isotope records of organic matter input and its fate in the Pichavaram mangrove–estuarine sediments (Tamil Nadu, India). Mar Chem 126:163–172
Rundegren N, Loader NJ, Hammarlund D (2003) Stable carbon isotope composition of terrestrial leaves: inter- and intraspecies variability, cellulose and whole-leaf tissue difference and potential for climate reconstruction. J Quat Sci 18:583–590
Singh A, Ramesh R (2011) Contribution of riverine dissolved inorganic nitrogen flux to new production in the coastal northern Indian Ocean: an assessment. Int J Oceanogr. doi:10.1155/2011/983561
Sood A, Mathukumalli MBK (2011) Managing international river basins: reviewing India–Bangladesh transboundary water issues. Int J River Basin Mgmt 9(1):43–52
Sweeney RE, Kaplan IR (1980) Natural abundances of 15N as a source indicator for near-shore marine sedimentary and dissolved nitrogen. Mar Chem 9:81–94
Thimdee W, Deein G, Sangrungruang C, Nishioka J, Matsunaga K (2003) Sources and fate of organic matter in Khung Krabaen Bay (Thailand) as traced by δ13C and C/N atomic ratios. Wetlands 23(4):729–738
Thornton SF, McManus J (1994) Application of organic carbon and nitrogen stable isotopes and C/N ratios as source indicators of organic matter provenance in estuarine systems: evidence from the Tay Estuary, Scotland. Estuar Coast Shelf Sci 38:219–233
Tue NT, Hamaoka H, Sogabe A, Quy TD, Nhuan MT, Omori K (2011) Sources of sedimentary organic carbon in mangrove ecosystems from Ba Lat estuary, Red River, Vietnam. In: Omori K, Guo X, Yoshie N, Fujii N, Handoh IC, Isobe A, Tanabe S (eds) Interdisciplinary Studies on Environmental Chemistry-Marine Environmental Modeling & Analysis. Terrapub, pp. 151–157
Wigand C, McKinney RA, Cole ML, Thursby GB, Cummings J (2007) Varying stable nitrogen isotope ratios of different marsh plants and their relationships with wastewater nitrogen and land use in New England, USA. Environ Monit Asses 131:71–81
Wooller MJ, Smallwood B, Jacobson M, Fogel M (2003) Carbon and nitrogen stable isotopic variation in Laguncularia racemosa from Florida and Belize: implication for trophic level studies. Hydrobiologia 499:13–23