Abstract
Dissolved organic matter (DOM) is a critical component in aquatic ecosystems, yet its seasonal variability and reactivity remain not well constrained. These were investigated at the land-ocean interface of a subtropical river (Minjiang River, SE China), using absorption and fluorescence spectroscopy. The annual export flux of dissolved organic carbon (DOC) from the Minjiang River (5.48 × 1010 g year−1) was highest among the rivers adjacent to the Taiwan Strait, with 72% occurring in spring and summer. The freshwater absorption coefficient a280, DOC-specific UV absorbance SUVA254 and humification index HIX were higher, while the spectral slope S275–295 and biological index BIX were lower in summer than in winter. This suggests intensified export of terrestrial aromatic and high molecular weight constituents in the rainy summer season. Six fluorescent components were identified from 428 samples, including humic-like C1–C3, tryptophan-like C4 and C6, and tyrosine-like C5. The freshwater levels of four components (C1, C2, C4, and C6) were lower while that of C5 was higher in the wet season than in the dry season, suggesting contrasting seasonal variations of different constituents. Laboratory experiments were performed to assess the effects of photochemical and microbial degradation on DOM. Photo-degradation removed chromophoric and fluorescent DOM (CDOM and FDOM) effectively, which was stronger (i) for high molecular weight/humic constituents and (ii) during summer under higher solar radiation. Microbial degradation under laboratory controlled conditions generally showed little effect on DOC, and had smaller impact on CDOM and FDOM in winter than in summer. Overall, this study showed notable seasonal changes in the chemical composition and reactivity of DOM at the land-ocean interface, and demonstrated the significant effects of photo-degradation.
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Arguelho MLPM, Alves JPH, Monteiro ASC, Garcia CAB (2017) Characterization of dissolved organic matter in an urbanized estuary located in Northeastern Brazil. Environ Monit Assess 189(6):272
Battin TJ, Kaplan LA, Findlay S, Hopkinson CS, Marti E, Packman AI, Newbold JD, Sabater F (2008) Biophysical controls on organic carbon fluxes in fluvial networks. Nature Geosci 1:95–100
Benner R, Amon RMW (2015) The size-reactivity continuum of major bioelements in the ocean. Annu Rev Mar Sci 7:185–205
Chen M, Jaffé R (2014) Photo- and bio-reactivity patterns of dissolved organic matter from biomass and soil leachates and surface waters in a subtropical wetland. Water Res 61:181–190
Chen W, Guéguen C, Smith DS, Galceran J, Puy J, Companys E (2018) Metal (Pb, Cd, and Zn) binding to diverse organic matter samples and implications for speciation modeling. Environ Sci Technol 52:4163–4172
Coble PG (2007) Marine optical biogeochemistry: the chemistry of ocean color. Chem Rev 107:402–418
Dai M, Yin Z, Meng F, Liu Q, Cai W-J (2012) Spatial distribution of riverine DOC inputs to the ocean: an updated global synthesis. Curr Opin Env Sust 4:170–178
Fellman J, Hood E, D’Amore D, Edwards R, White D (2009) Seasonal changes in the chemical quality and biodegradability of dissolved organic matter exported from soils to streams in coastal temperate rainforest watersheds. Biogeochemistry 95:277–293
Fellman JB, Hood E, Spencer RGM (2010) Fluorescence spectroscopy opens new windows into dissolved organic matter dynamics in freshwater ecosystems: A review. Limnology and Oceanography 55 (6):2452-2462
Fuß T, Behounek B, Ulseth AJ, Singer GA (2017) Land use controls stream ecosystem metabolism by shifting dissolved organic matter and nutrient regimes. Freshwater Biol 62(3):582–599
Graeber D, Gelbrecht J, Pusch MT, Anlanger C, von Schiller D (2012) Agriculture has changed the amount and composition of dissolved organic matter in Central European headwater streams. Sci Total Environ 438:435–446
Gueguen C, Cuss CW, Cassels CJ, Carmack EC (2014) Absorption and fluorescence of dissolved organic matter in the waters of the Canadian Arctic Archipelago, Baffin Bay, and the Labrador Sea. J Geophys Res-Oceans 119:2034–2047
Guo W, Yang L, Hong H, Stedmon CA, Wang F, Xu J, **e Y (2011) Assessing the dynamics of chromophoric dissolved organic matter in a subtropical estuary using parallel factor analysis. Mar Chem 124:125–133
Guo W, Yang L, Yu X, Zhai W, Hong H (2012) Photo-production of dissolved inorganic carbon from dissolved organic matter in contrasting coastal waters in the southwestern Taiwan Strait, China. J Environ Sci-China 24:1181–1188
Helms JR, Stubbins A, Ritchie JD, Minor EC, Kieber DJ, Mopper K (2008) Absorption spectral slopes and slope ratios as indicators of molecular weight, source, and photobleaching of chromophoric dissolved organic matter. Limnol Oceanogr 53:955–969
Hong H, Yang L, Guo W, Wang F, Yu X (2012) Characterization of dissolved organic matter under contrasting hydrologic regimes in a subtropical watershed using PARAFAC model. Biogeochemistry 109:163–174
Huang TH, Fu YH, Pan PY, Chen CTA (2012) Fluvial carbon fluxes in tropical rivers. Curr Opin Environ Sustain 4:162–169
Huguet A, Vacher L, Relexans S, Saubusse S, Froidefond JM, Parlanti E (2009) Properties of fluorescent dissolved organic matter in the Gironde Estuary. Org Geochem 40:706–719
Hur J, Nguyen H-M, Lee B-M (2014) Influence of upstream land use on dissolved organic matter and trihalomethane formation potential in watersheds for two different seasons. Environ Sci Pollut Res 21:7489–7500
Inamdar S, Finger N, Singh S, Mitchell M, Levia D, Bais H, Scott D, McHale P (2012) Dissolved organic matter (DOM) concentration and quality in a forested mid-Atlantic watershed, USA. Biogeochemistry 108:55–76
Kellerman AM, Guillemette F, Podgorski DC, Aiken GR, Butler KD, Spencer RGM (2018) Unifying concepts linking dissolved organic matter composition to persistence in aquatic ecosystems. Environ Sci Technol 52:2538–2548
Kowalczuk P, Tilstone GH, Zabłocka M, Röttgers R, Thomas R (2013) Composition of dissolved organic matter along an Atlantic Meridional Transect from fluorescence spectroscopy and Parallel Factor Analysis. Mar Chem 157:170–184
Lambert T, Teodoru CR, Nyoni FC, Bouillon S, Darchambeau F, Massicotte P, Borges AV (2016) Along-stream transport and transformation of dissolved organic matter in a large tropical river. Biogeosciences 13:2727–2741
Lønborg C, Álvarez-Salgado XA, Davidson K, Martínez-García S, Teira E (2010) Assessing the microbial bioavailability and degradation rate constants of dissolved organic matter by fluorescence spectroscopy in the coastal upwelling system of the Ría de Vigo. Mar Chem 119:121–129
Ludwig W, Probst JL, Kempe S (1996) Predicting the oceanic input of organic carbon by continental erosion. Glob Biogeochem Cycles 10:23–41
McKnight DM, Boyer EW, Westerhoff PK, Doran PT, Kulbe T, Andersen DT (2001) Spectrofluorometric characterization of dissolved organic matter for indication of precursor organic material and aromaticity. Limnol Oceanogr 46:38–48
Murphy KR, Hambly A, Singh S, Henderson RK, Baker A, Stuetz R, Khan SJ (2011) Organic matter fluorescence in municipal water recycling schemes: toward a unified PARAFAC model. Environ Sci Technol 45:2909–2916
Murphy KR, Stedmon CA, Wenig P, Bro R (2014) OpenFluor–an online spectral library of auto-fluorescence by organic compounds in the environment. Anal Methods 6:658–661
Nelson NB, Siegel DA (2013) The global distribution and dynamics of chromophoric dissolved organic matter. Annu Rev Mar Sci 5:447–476
Nguyen HV-M, Lee M-H, Hur J, Schlautman MA (2013) Variations in spectroscopic characteristics and disinfection byproduct formation potentials of dissolved organic matter for two contrasting storm events. J Hydrol 481:132–142
Osburn CL, Stedmon CA (2011) Linking the chemical and optical properties of dissolved organic matter in the Baltic-North Sea transition zone to differentiate three allochthonous inputs. Mar Chem 126:281–294
Powers LC, Luek JL, Schmitt-Kopplin P, Campbell BJ, Magen C, Cooper LW, Gonsior M (2018) Seasonal changes in dissolved organic matter composition in Delaware Bay, USA in March and August 2014. Org Geochem 122:87–97
Romera-Castillo C, Sarmento H, Alvarez-Salgado XA, Gasol JM, Marrase C (2010) Production of chromophoric dissolved organic matter by marine phytoplankton. Limnol Oceanogr 55:446–454
Romera-Castillo C, Sarmento H, Alvarez-Salgado XA, Gasol JM, Marrase C (2011) Net production/consumption of fluorescent coloured dissolved organic matter by natural bacterial assemblages growing on marine phytoplankton exudates. Appl Environ Microbiol 77(21):7490–7498
Santos L, Santos EBH, Dias JM, Cunha A, Almeida A (2014) Photochemical and microbial alterations of DOM spectroscopic properties in the estuarine system Ria de Aveiro. Photochem Photobiol Sci 13:1146–1159
Santos L, Pinto A, Filipe O, Cunha Â, Santos EBH, Almeida A (2016) Insights on the optical properties of estuarine DOM – hydrological and biological Influences. Plos One 11(5):e0154519
Shutova Y, Baker A, Bridgeman J, Henderson RK (2014) Spectroscopic characterisation of dissolved organic matter changes in drinking water treatment: From PARAFAC analysis to online monitoring wavelengths. Water Res 54:159–169
Singh S, Inamdar S, Mitchell M, McHale P (2014) Seasonal pattern of dissolved organic matter (DOM) in watershed sources: influence of hydrologic flow paths and autumn leaf fall. Biogeochemistry 118:321–337
Singh S, Dash P, Silwal S, Feng G, Adeli A, Moorhead RJ (2017) Influence of land use and land cover on the spatial variability of dissolved organic matter in multiple aquatic environments. Environ Sci Pollut Res 24:14124–14141
Spencer RGM, Hernes PJ, Ruf R, Baker A, Dyda RY, Stubbins A, Six J (2010) Temporal controls on dissolved organic matter and lignin biogeochemistry in a pristine tropical river, Democratic Republic of Congo. J Geophys Res 115:G03013. https://doi.org/10.1029/2009JG001180
Spencer RGM, Guo W, Raymond PA, Dittmar T, Hood E, Fellman J, Stubbins A (2014) Source and biolability of ancient dissolved organic matter in glacier and lake ecosystems on the Tibetan Plateau. Geochim Cosmochim Acta 142:64–74
Stedmon CA, Bro R (2008) Characterizing dissolved organic matter fluorescence with parallel factor analysis: A tutorial. Limnol Oceanogr-Meth 6:572–579
Stedmon CA, Markager S (2005) Resolving the variability in dissolved organic matter fluorescence in a temperate estuary and its catchment using PARAFAC analysis. Limnol Oceanogr 50:686–697
Stedmon CA, Markager S, Tranvik L, Kronberg L, Slatis T, Martinsen W (2007a) Photochemical production of ammonium and transformation of dissolved organic matter in the Baltic Sea. Mar Chem 104:227–240
Stedmon CA, Thomas DN, Granskog M, Kaartokallio H, Papadimitriou S, Kuosa H (2007b) Characteristics of dissolved organic matter in Baltic coastal sea ice: Allochthonous or autochthonous origins? Environ Sci Technol 41:7273–7279
Vonk JE, Mann PJ, Davydov S, Davydova A, Spencer RGM, Schade J, Sobczak WV, Zimov N, Zimov S, Bulygina E, Eglinton TI, Holmes RM (2013) High biolability of ancient permafrost carbon upon thaw. Geophys Res Lett 40:2689–2693
Wang W, Johnson CG, Takeda K, Zafiriou OC (2009) Measuring the Photochemical production of carbon dioxide from marine dissolved organic matter by pool isotope exchange. Environ Sci Technol 43:8604–8609
Weishaar JL, Aiken GR, Bergamaschi BA, Fram MS, Fujii R, Mopper K (2003) Evaluation of specific ultraviolet absorbance as an indicator of the chemical composition and reactivity of dissolved organic carbon. Environ Sci Technol 37:4702–4708
Wiegner TN, Tubal RL, MacKenzie RA (2009) Bioavailability and export of dissolved organic matter from a tropical river during base- and stormflow conditions. Limnol Oceanogr 54:1233–1242
Yamashita Y, Scinto LJ, Maie N, Jaffe R (2010) Dissolved organic matter characteristics across a subtropical wetland's landscape: Application of optical properties in the assessment of environmental dynamics. Ecosystems 13:1006–1019
Yamashita Y, Boyer JN, Jaffe R (2013) Evaluating the distribution of terrestrial dissolved organic matter in a complex coastal ecosystem using fluorescence spectroscopy. Cont Shelf Res 66:136–144
Yang L, Hong H, Chen C-TA, Guo W, Huang T-H (2013) Chromophoric dissolved organic matter in the estuaries of populated and mountainous Taiwan. Mar Chem 157:12–23
Yang L, Kim D, Uzun H, Karanfil T, Hur J (2015a) Assessing trihalomethanes (THMs) and N-nitrosodimethylamine (NDMA) formation potentials in drinking water treatment plants using fluorescence spectroscopy and parallel factor analysis. Chemosphere 121:84–91
Yang L, Hur J, Lee S, Chang S-W, Shin H-S (2015b) Dynamics of dissolved organic matter during four storm events in two forest streams: source, export, and implications for harmful disinfection byproduct formation. Environ Sci Pollut Res 22:9173–9183
Yang L, Chen C-TA, Hong H, Chang Y-C, Lui H-K (2015c) Mixing behavior and bioavailability of dissolved organic matter in two contrasting subterranean estuaries as revealed by fluorescence spectroscopy and parallel factor analysis. Estuar Coast Shelf Sci 166:161–169
Yoon B, Raymond PA (2012) Dissolved organic matter export from a forested watershed during Hurricane Irene. Geophys Res Lett 39:L18402. https://doi.org/10.1029/2012gl052785
Zhuang W-E, Yang L (2018) Impacts of global changes on the biogeochemistry and environmental effects of dissolved organic matter at the land-ocean interface: a review. Environ Sci Pollut Res 25:4165–4173
Zsolnay A, Baigar E, Jimenez M, Steinweg B, Saccomandi F (1999) Differentiating with fluorescence spectroscopy the sources of dissolved organic matter in soils subjected to drying. Chemosphere 38:45–50
Acknowledgments
Rui Gong is thanked for her help in sample collection and measurement in the spring investigation. The editor Professor Céline Guéguen and two anonymous reviewers are thanked greatly for their valuable comments that improved the quality of the paper.
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This work was financially supported by the National Natural Science Foundation of China (41606094).
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Yang, L., Cheng, Q., Zhuang, WE. et al. Seasonal changes in the chemical composition and reactivity of dissolved organic matter at the land-ocean interface of a subtropical river. Environ Sci Pollut Res 26, 24595–24608 (2019). https://doi.org/10.1007/s11356-019-05700-2
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DOI: https://doi.org/10.1007/s11356-019-05700-2