Hydrological and Biogeochemical Controls of Seasonality in Dissolved Organic Matter Delivery to a Blackwater Estuary
Changes in riverine discharge of dissolved organic matter (DOM) serves as an indicator of linkages between terrestrial ecosystem and receiving aquatic environments. In this study, we test the hypothesis that the seasonal variability of DOM in an estuary fed by a blackwater river is primarily controlled by water discharge and also modified by photochemical and biological processes. We collected surface water samples during 4-week-long field campaigns to the lower Pearl River estuary located in southeastern Louisiana, two during high discharge in spring and two during low discharge in winter and summer, respectively. DOM composition was determined using spectrofluorometric indices and a site-specific parallel factor model, and dissolved organic carbon (DOC) concentrations. Spring samples with low salinity showed higher abundance of terrestrial, humic-like DOM and higher DOC concentrations, indicating the export of flood plain-derived DOM during high discharge. In contrast, summer and winter samples with high salinity had greater proportions of labile DOM and higher biological and fluorescence indices, which may reflect enhanced photochemical and biological degradation during summer and better preservation of labile DOM in winter. Spring DOM displayed highly variable source and quality character, relative to winter and summer samples. This observation suggests that river discharge acted as a more rapid and direct control of spatial variation in DOM and photochemical and biological degradation was responsible for removing this flow-related variation between seasons. The incubation experiments showed that natural light can remove terrestrial and microbial humic DOM, while bacterial degradation was responsible for degrading protein-like DOM. Our results provide new evidence that DOM seasonality in blackwater river estuarine environments is collectively regulated by discharge and photochemical and biological degradation.
KeywordsParallel factor analysis Excitation-emission matrices Dissolved organic matter Estuarine environments Pearl River Blackwater rivers
This work was supported by NOAA Unmanned Aerial Systems Program Office through the Northern Gulf Institute, a NOAA Cooperative Institute (grant no. NA11OAR4320199) and the faculty start-up grant to Padmanava Dash. The authors are thankful to Christopher Zarzar, Department of Geosciences, and Gray Turnage, Geosystems Research Institute at the Mississippi State University for their help with water sampling.
Compliance with Ethical Standards
Conflict of Interest
The authors declare that they have no conflict of interest.
- Anderson, J.R., E.E. Hardy, J.T. Roach, R.E. Witmer. 1976. A land use and land cover classification system for use with remote sensor Data. USGS Professional Paper 964. A revision of the land use classification system as presented in the USGS Circular 671.Google Scholar
- Bittar, Thais B., Stella A. Berger, Laura M. Birsa, Tina L. Walters, Megan E. Thompson, Robert G.M. Spencer, Elizabeth L. Mann, Aron Stubbins, Marc E. Frischer, and Jay A. Brandes. 2016. Seasonal dynamics of dissolved, particulate and microbial components of a tidal saltmarsh-dominated estuary under contrasting levels of freshwater discharge. Estuarine, Coastal and Shelf Science 182. Elsevier Ltd: 72–85. doi: https://doi.org/10.1016/j.ecss.2016.08.046.
- Blanchet, Marine, Olivier Pringault, Christos Panagiotopoulos, Dominique Lefevre, Bruno Charriere, Jean Francois Ghiglione, Camila Fernandez, et al. 2017. When riverine dissolved organic matter (DOM) meets labile DOM in coastal waters: changes in bacterial community activity and composition. Aquatic Sciences: 1–17. doi: https://doi.org/10.1007/s00027-016-0477-0.
- Buffam, Ishi, Hjalmar Laudon, Johan Temnerud, Carl-Magnus Mörth, and Kevin Bishop. 2007. Landscape-scale variability of acidity and dissolved organic carbon during spring flood in a boreal stream network. Journal of Geophysical Research 112: 1–11. https://doi.org/10.1029/2006JG000218.CrossRefGoogle Scholar
- Caffrey, Jane M., Michael C. Murrell, Kendra S. Amacker, Jennifer W. Harper, Scott Phipps, and Mark S. Woodrey. 2014. Seasonal and inter-annual patterns in primary production, respiration, and net ecosystem metabolism in three estuaries in the Northeast Gulf of Mexico. Estuaries and Coasts 37: 222–241. https://doi.org/10.1007/s12237-013-9701-5.CrossRefGoogle Scholar
- Cai, Yihua, Laodong Guo, Xuri Wang, Steven E. Lohrenz, and Allison K. Mojzis. 2013. Effects of tropical cyclones on river chemistry: a case study of the lower Pearl River during hurricanes Gustav and Ike. Estuarine, Coastal and Shelf Science 129. Elsevier Ltd: 180–188. doi: https://doi.org/10.1016/j.ecss.2013.05.019.
- Chen, Hao, Wei Meng, Bing-hui Zheng, Chun-yan Wang, and Li-hui An. 2013. Optical signatures of dissolved organic matter in the watershed of a globally large river (Yangtze River, China). Limnologica 43. Elsevier GmbH.: 482–491. doi: https://doi.org/10.1016/j.limno.2013.04.004.
- Chow, Alex T., Jianing Dai, William H. Conner, Daniel R. Hitchcock, and Jun-Jian Wang. 2012. Dissolved organic matter and nutrient dynamics of a coastal freshwater forested wetland in Winyah Bay, South Carolina. Biogeochemistry: 1–17. https://doi.org/10.1007/s10533-012-9750-z.
- Dash, Padmanava, Nan D. Walker, Deepak R. Mishra, Chuanmin Hu, James L. Pinckney, and Eurico J. D’Sa. 2011. Estimation of cyanobacterial pigments in a freshwater lake using OCM satellite data. Remote Sensing of Environment 115. Elsevier Inc.: 3409–3423. doi: https://doi.org/10.1016/j.rse.2011.08.004.
- DeVilbiss, Stephen E., Zhengzhen Zhou, J. Val Klump, and Laodong Guo. 2016. Spatiotemporal variations in the abundance and composition of bulk and chromophoric dissolved organic matter in seasonally hypoxia-influenced Green Bay, Lake Michigan, USA. Science of the Total Environment 565. Elsevier B.V.: 742–757. doi: https://doi.org/10.1016/j.scitotenv.2016.05.015.
- Duan, Shuiwang, Thomas S. Bianchi, and Troy P. Sampere. 2007a. Temporal variability in the composition and abundance of terrestrially-derived dissolved organic matter in the lower Mississippi and Pearl Rivers. Marine Chemistry 103: 172–184. https://doi.org/10.1016/j.marchem.2006.07.003.CrossRefGoogle Scholar
- Duan, Shuiwang, Thomas S. Bianchi, Alan M. Shiller, Karl Dria, Patrick G. Hatcher, and Kevin R. Carman. 2007b. Variability in the bulk composition and abundance of dissolved organic matter in the lower Mississippi and Pearl rivers. Journal of Geophysical Research 112: 1–12. https://doi.org/10.1029/2006JG000206.Google Scholar
- Eleuterius, C.K. 1977. Location of the Mississippi Sound Oyster Reefs as related to salinity of bottom waters during 1973-1975. Gulf Research Reports 6 (1): 17–23.Google Scholar
- Fellman, J.B., E. Hood, D.V. D’Amore, R.T. Edwards, and D. White. 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. https://doi.org/10.1007/s10533-009-9336-6.CrossRefGoogle Scholar
- Hansen, Angela M., Tamara E.C. Kraus, Brian A. Pellerin, Jacob A. Fleck, Bryan D. Downing, and Brian A. Bergamaschi. 2016. Optical properties of dissolved organic matter (DOM): Effects of biological and photolytic degradation. Limnology and Oceanography 61: 1015–1032. https://doi.org/10.1002/lno.10270.CrossRefGoogle Scholar
- Helms, John R., A. Stubbins, J.D. Ritchie, E.C. Minor, D.J. Kieber, and K. Mopper. 2008. Absorption spectral slopes and slope ratios as indicators of molecular weight, source, and photobleaching of chromophoric dissolved organic matter. Limnology and Oceanography 53: 955–969. https://doi.org/10.4319/lo.2008.53.3.0955.CrossRefGoogle Scholar
- Helms, John R., Aron Stubbins, E. Michael Perdue, Nelson W. Green, Hongmei Chen, and Kenneth Mopper. 2013. Photochemical bleaching of oceanic dissolved organic matter and its effect on absorption spectral slope and fluorescence. Marine Chemistry 155. Elsevier B.V.: 81–91. doi: https://doi.org/10.1016/j.marchem.2013.05.015.
- Hernes, P.J., R.G.M. Spencer, R.Y. Dyda, B.A. Pellerin, P.A.M. Bachand, and B.A. Bergamaschi. 2008. The role of hydrologic regimes on dissolved organic carbon composition in an agricultural watershed. Geochimica et Cosmochimica Acta 72. Elsevier Ltd: 5266–5277. doi: https://doi.org/10.1016/j.gca.2008.07.031.
- Hu, Yue, YueHan Lu, Jennifer W. Edmonds, Chuankun Liu, Sai Wang, Oindrila Das, Jie Liu, and Chunmiao Zheng. 2016. Hydrological and land use control of watershed exports of dissolved organic matter in a large arid river basin in northwestern China. Journal of Geophysical Research G: Biogeosciences 121: 466–478. https://doi.org/10.1002/2015JG003082.Google Scholar
- Johnson, D., and R. Mueller. 2010. The 2009 cropland data layer. Photogrammetric Engineering & Remote Sensing 76 (11): 1201–1205.Google Scholar
- Kellerman, Anne M, Thorsten Dittmar, Dolly N Kothawala, and Lars J Tranvik. 2014. Chemodiversity of dissolved organic matter in lakes driven by climate and hydrology. Nature Communications 5. Nature Publishing Group: 3804. doi: https://doi.org/10.1038/ncomms4804.
- Leech, Dina M., Scott H. Ensign, and Michael F. Piehler. 2016. Spatiotemporal patterns in the export of dissolved organic carbon and chromophoric dissolved organic matter from a coastal, blackwater river. Aquatic Sciences 78. Springer International Publishing: 1–14. doi: https://doi.org/10.1007/s00027-016-0474-3.
- Liu, Li, Cunyi Song, Zengguang Yan, and Fasheng Li. 2009. Characterizing the release of different composition of dissolved organic matter in soil under acid rain leaching using three-dimensional excitation-emission matrix spectroscopy. Chemosphere 77. Elsevier Ltd: 15–21. doi: https://doi.org/10.1016/j.chemosphere.2009.06.026.
- Lu, Yuehan, James E. Bauer, Elizabeth A. Canuel, Youhei Yamashita, R.M. Chambers, and Rudolf Jaffé. 2013. Photochemical and microbial alteration of dissolved organic matter in temperate headwater streams associated with different land use. Journal of Geophysical Research: Biogeosciences 118: 566–580. https://doi.org/10.1002/jgrg.20048.Google Scholar
- Lu, YueHan, Jennifer W. Edmonds, Youhei Yamashita, Bin Zhou, Andrea Jaegge, and Matthew Baxley. 2015a. Spatial variation in the origin and reactivity of dissolved organic matter in Oregon-Washington coastal waters. Ocean Dynamics 65: 17–32. https://doi.org/10.1007/s10236-014-0793-7.CrossRefGoogle Scholar
- Lu, Yuehan, Xiaping Li, Rajaa Mesfioui, James E. Bauer, R.M. Chambers, Elizabeth A. Canuel, and Patrick G. Hatcher. 2015b. Use of ESI-FTICR-ms to characterize dissolved organic matter in headwater streams draining forest-dominated and pasture-dominated watersheds. PLoS One 10: 1–21. https://doi.org/10.1371/journal.pone.0145639.Google Scholar
- Maie, Nagamitsu, Youhei Yamashita, Rose M. Cory, J.N. Boyer, and Rudolf Jaffé. 2012. Application of excitation emission matrix fluorescence monitoring in the assessment of spatial and seasonal drivers of dissolved organic matter composition: sources and physical disturbance controls. Applied Geochemistry 27. Elsevier Ltd: 917–929. doi: https://doi.org/10.1016/j.apgeochem.2011.12.021.
- McKnight, D.M., E.W. Boyer, P.K. Westerhoff, P.T. Doran, T. Kulbe, and D.T. Andersen. 2001. Spectrofluorometric characterization of dissolved organic matter for indication of precursor organic material and aromaticity. Limnology and Oceanography 46: 38–48. https://doi.org/10.4319/lo.2001.46.1.0038.CrossRefGoogle Scholar
- Osburn, Christopher L., Molly P. Mikan, J. Randall Etheridge, Michael R. Burchell, and François Birgand. 2015. Seasonal variation in the quality of dissolved and particulate organic matter exchanged between a salt marsh and its adjacent estuary. Journal of Geophysical Research G: Biogeosciences 120: 1430–1449. https://doi.org/10.1002/2014JG002897.Google Scholar
- Osburn, Christopher L., Thomas J. Boyd, Michael T. Montgomery, Thomas S. Bianchi, Richard B. Coffin, and Hans W. Paerl. 2016. Optical proxies for terrestrial dissolved organic matter in estuaries and coastal waters. Frontiers in Marine Science 2: 127. https://doi.org/10.3389/fmars.2015.00127.CrossRefGoogle Scholar
- Overway, K. S. 2017. Environmental chemistry: an analytical approach, John Wiley & Sons, p.352.Google Scholar
- Paerl, Hans W., Lexia M. Valdes, Benjamin L. Peierls, Jason E. Adolf, and Lawrence W. Harding Jr. 2006. Anthropogenic and climatic influences on the eutrophication of large estuarine ecosystems. Limnology and Oceanography 51: 448–462. https://doi.org/10.4319/lo.2006.51.1_part_2.0448.CrossRefGoogle Scholar
- Para, J., Paula G. Coble, B. Charriere, M. Tedetti, C. Fontana, and R. Sempere. 2010. Fluorescence and absorption properties of chromophoric dissolved organic matter (CDOM) in coastal surface waters of the northwestern Mediterranean Sea, influence of the Rhone River. Biogeosciences 7: 4083–4103. https://doi.org/10.5194/bg-7-4083-2010.CrossRefGoogle Scholar
- Pellerin, Brian A., John Franco Saraceno, James B. Shanley, Stephen D. Sebestyen, George R. Aiken, Wilfred M. Wollheim, and Brian A. Bergamaschi. 2011. Taking the pulse of snowmelt: in situ sensors reveal seasonal, event and diurnal patterns of nitrate and dissolved organic matter variability in an upland forest stream. Biogeochemistry 108: 183–198. https://doi.org/10.1007/s10533-011-9589-8.CrossRefGoogle Scholar
- Raymond, Peter A., and Robert G M Spencer. 2014. Riverine DOM. Biogeochemistry of marine dissolved organic matter: Second Edition: 509–533. doi: https://doi.org/10.1016/B978-0-12-405940-5.00011-X.
- Roelke, Daniel L., James B. Cotner, José V. Montoya, Carlos E. Del Castillo, Stephen E. Davis, Jennifer A. Snider, George M. Gable, and Kirk O. Winemiller. 2006. Optically determined sources of allochthonous organic matter and metabolic characterizations in a tropical oligotrophic river and associated lagoon. Journal of the North American Benthological Society 25: 185–197. https://doi.org/10.1899/0887-3593(2006)25.CrossRefGoogle Scholar
- Romera-Castillo, Cristina, Hugo Sarmento, Xosé Antón Alvarez-Salgado, Josep M. Gasol, and Celia Marrasé. 2011. Net production/consumption of fluorescent colored dissolved organic matter by natural bacterial assemblages growing on marine phytoplankton exudates. Applied and Environmental Microbiology 77: 7490–7498. https://doi.org/10.1128/AEM.00200-11.CrossRefGoogle Scholar
- Sankar, M.S., P. Dash, S. Singh, Y. Lu, A.E. Mercer, and S. Chen. 2018. Effect of photo-biodegradation and biodegradation on the biogeochemical cycling of dissolved organic matter across diverse surface water bodies. Journal of Environmental Sciences. https://doi.org/10.1016/J.JES.2018.06.021.
- Santín, C., Y. Yamashita, X.L. Otero, M.Á. Álvarez, and R. Jaffé. 2009. Characterizing humic substances from estuarine soils and sediments by excitation-emission matrix spectroscopy and parallel factor analysis. Biogeochemistry 96: 131–147. https://doi.org/10.1007/s10533-009-9349-1.CrossRefGoogle Scholar
- von Schiller, Daniel, Daniel Graeber, Miquel Ribot, Xisca Timoner, Vicenç Acuña, Eugenia Marti, Sergi Sabater, et al. 2015. Hyrological transitions drive dissolved organic matter quantity and composition in a temporary Mediterranean stream. Biogeochemistry 123: 429–446. doi: https://doi.org/10.1007/s10533-015-0077-4.
- Seager, Richard, Alexandrina Tzanova, and Jennifer Nakamura. 2009. Drought in the southeastern United States: causes, variability over the last millennium, and the potential for future hydroclimate change. Journal of Climate 22: 5021–5045. https://doi.org/10.1175/2009JCLI2683.1.CrossRefGoogle Scholar
- Sebestyen, Stephen D., Elizabeth W. Boyer, James B. Shanley, Carol Kendall, Daniel H. Doctor, George R. Aiken, and Nobuhito Ohte. 2008. Sources, transformations, and hydrological processes that control stream nitrate and dissolved organic matter concentrations during snowmelt in an upland forest. Water Resources Research 44: 1–14. https://doi.org/10.1029/2008WR006983.CrossRefGoogle Scholar
- Shang, Peng, YueHan Lu, YingXun Du, Rudolf Jaffé, Robert H. Findlay, and Anne Wynn. 2018. Climatic and watershed controls of dissolved organic matter variation in streams across a gradient of agricultural land use. Science of the Total Environment 612. Elsevier B.V.: 1442–1453. doi: https://doi.org/10.1016/j.scitotenv.2017.08.322.
- Shank, G. Christopher, Richard G. Zepp, Robert F. Whitehead, and Mary Ann Moran. 2005. Variations in the spectral properties of freshwater and estuarine CDOM caused by partitioning onto river and estuarine sediments. Estuarine, Coastal and Shelf Science 65: 289–301. https://doi.org/10.1016/j.ecss.2005.06.009.CrossRefGoogle Scholar
- Singh, Shatrughan, Eurico J. D’Sa, and Erick M. Swenson. 2010. Chromophoric dissolved organic matter (CDOM) variability in Barataria Basin using excitation-emission matrix (EEM) fluorescence and parallel factor analysis (PARAFAC). Science of the Total Environment 408. Elsevier B.V.: 3211–3222. doi: https://doi.org/10.1016/j.scitotenv.2010.03.044.
- Singh, Shatrughan, Padmanava Dash, Saurav Silwal, Gary Feng, Ardeshir Adeli, and Robert J. Moorhead. 2017. Influence of land use and land cover on the spatial variability of dissolved organic matter in multiple aquatic environments. Environmental Science and Pollution Research 24: 14124–14141. https://doi.org/10.1007/s11356-017-8917-5.CrossRefGoogle Scholar
- Spencer, Robert G.M., George R. Aiken, Mark M. Dornblaser, Kenna D. Butler, R. Max Holmes, Greg Fiske, Paul J. Mann, and Aron Stubbins. 2013. Chromophoric dissolved organic matter export from U.S. rivers. Geophysical Research Letters 40: 1575–1579. https://doi.org/10.1002/grl.50357.CrossRefGoogle Scholar
- Stedmon, Colin A., and Rasmus Bro. 2008. Characterizing dissolved organic matter fluorescence with parallel factor analysis: a tutorial. Limnology and Oceanography: Methods 6: 572–579.Google Scholar
- Stedmon, Colin A., Stiig Markager, Lars Tranvik, Leif Kronberg, Tove Slätis, and Winnie Martinsen. 2007. Photochemical production of ammonium and transformation of dissolved organic matter in the Baltic Sea. Marine Chemistry 104: 227–240. https://doi.org/10.1016/j.marchem.2006.11.005.CrossRefGoogle Scholar
- Tedetti, Marc, Pascale Cuet, Catherine Guigue, and Madeleine Goutx. 2011. Characterization of dissolved organic matter in a coral reef ecosystem subjected to anthropogenic pressures (La Réunion Island, Indian Ocean) using multi-dimensional fluorescence spectroscopy. Science of the Total Environment 409. Elsevier B.V.: 2198–2210. doi: https://doi.org/10.1016/j.scitotenv.2011.01.058.
- USDA (2017) web: https://gdg.sc.egov.usda.gov/GDGOrder.aspx accessed in February 2017.
- von Wachenfeldt, Eddie, Sebastian Sobek, David Bastviken, and Lars J. Tranvik. 2008. Linking allochthonous dissolved organic matter and boreal lake sediment carbon sequestration: The role of light-mediated flocculation. Limnology and Oceanography 53: 2416–2426. https://doi.org/10.4319/lo.2008.53.6.2416.CrossRefGoogle Scholar
- Walsh, John, Donald Wuebbles, Katharine Hayhoe, James Kossin, Kenneth Kunkel, Graeme Stephens, Peter Thorne, et al. 2014. Our changing climate. In Climate Change Impacts in the United States: The Third National Climate Assessment, ed. Jerry M. Melillo, Terese Richmond, and G. W. Yohe, 19–67. U.S. global change research program. doi: https://doi.org/10.7930/J0KW5CXT.
- Weishaar, J.L., George R. Aiken, B.A. Bergamaschi, M.S. Fram, R. Fujii, and K. Mopper. 2003. Evaluation of specific ultraviolet absorbance as an indicator of the chemical composition and reactivity of dissolved organic carbon. Environmental Science & Technology 37: 4702–4708. https://doi.org/10.1021/es030360x.CrossRefGoogle Scholar
- Yamashita, Y., R. Jaffé, N. Maie, and E. Tanoue. 2008. Assessing the dynamics of dissolved organic matter (DOM) in coastal environments by excitation emission matrix fluorescence and parallel factor analysis (EEM-PARAFAC). Limnology and Oceanography 53: 1900–1908. https://doi.org/10.4319/lo.2008.53.5.1900.CrossRefGoogle Scholar
- Yang, Liyang, Chen-Tung Arthur Chen, Hon-Kit Lui, Wan-E. Zhuang, and Bing-Jye Wang. 2016. Effects of microbial transformation on dissolved organic matter in the east Taiwan Strait and implications for carbon and nutrient cycling. Estuarine, Coastal and Shelf Science 180. Elsevier Ltd: 59–68. doi: https://doi.org/10.1016/j.ecss.2016.06.021.
- Zhang, Yunlin, Enlou Zhang, Yan Yin, Mark A. van Dijk, Longqing Feng, Zhiqiang Shi, Mingliang Liu, and Boqiang Qin. 2010. Characteristics and sources of chromophoric dissolved organic matter in lakes of the Yungui Plateau, China, differing in trophic state and altitude. Limnology and Oceanography 55: 2645–2659. https://doi.org/10.4319/lo.2010.55.6.2645.CrossRefGoogle Scholar