Publications

Buser-Young, B.Z., Garcia, P.E., Schrenk, M., Regier, P., Ward, N.D., Biçe, K., Brooks, S., Freeman, E., Lønborg, C. (2023). Determining the biogeochemical transformations of organic matter composition in rivers using molecular signatures. Frontiers in Water, 5.

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Hopple, A., Doro, K.O., Bailey, V.L., Bond-Lamberty, B., McDowell, N., Morris, K., Myers-Pigg, A., Pennington, S., Regier, P., Rich, R.,, Sengupta, A., Smith, R., Stegen, J., Ward, N.D., Woodard, S.C., Megonigal, J.P. (2023). Attaining freshwater and estuarine-water soil saturation in an ecosystem-scale coastal flooding experiment. Environmental Monitoring and Assessment, 195 (425).

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Coppola, A.I., Wagner, S., Lennartz, S.T., Seidel, M., Ward, N.D., Dittmar, T., Santin, C., Jones, M. (2022). The black carbon cycle and its role in the Earth system. Nature Reviews: Earth & Environment, 3, 516-532.

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Fremin, B.J., Global Phage Small Open Reading Frame Consortium (Includes Ward, N.D.), Bhatt, A., Kyrpides, N.C. (2022). Thousands of small, novel genes predicted in global phage genomes. Cell Reports, 39, 110984.

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Lee, M., Ward, N.D., Kent, R. (2022). A novel resonant electro-physical transmutation method for water purification. Nature Portfolio Journal: Clean Water, 5 (35).

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Li, W., McDowell, N.G., Wang, W., Mackay, D., Leff, R.T., Zhang, P., Ward, N.D., Norwood, M., Yabusaki, S., Myers-Pigg, A., Pennington, S., Pivovaroff, A., Waichler, S., Xu, C., Bond-Lamberty, B., Bailey, V. (2022). The influence of increasing atmospheric CO2, temperature, and vapor pressure deficit on seawater-induced tree mortality. New Phytologist, 235 (5), 1767-1779.

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McDowell, N.G., Ball, M., Bond-Lamberty, B., Kirwan, M.L., Krauss, K., Megonigal, J.P., Mencuccini, M., Ward, N.D., Weintraub, M., Bailey, V. (2022). Processes and mechanisms of coastal woody-plant mortality. Global Change Biology, 28 (20), 5881-5900.

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Regier, P., Duggan, M., Myers-Pigg, A., Ward, N.D. (2022). Effects of random forest modeling decisions on biogeochemical time series predictions. Limnology & Oceanography: Methods, 21 (1), 40-52.

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Richey, J.E., Spencer, R., Drake, T.W., Ward, N.D. (2022). Fluvial carbon dynamics across the land to ocean continuum of great tropical rivers: the Amazon and Congo. AGU Monograph Series, In Congo Basin Hydrology, Climate, and Biogeochemistry: A Foundation for the Future. Edited by Alsdorf, D.E., Tshimanga, R., Moukandi, G..

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Wang, W., Zhang, P., Zhang, H., Grossiord, C., Pennington, S., Norwood, M., Li, W., Pivovaroff, A.L., Fernández-de-Uña, L., Leff, R., Yabusaki, S., Waichler, S., Bond-Lamberty, B., Bailey, V., Ward, N.D., McDowell, N. (2022). Severe declines in hydraulic capacity and associated carbon starvation drive mortality in seawater exposed Sitka-spruce (Picea sitchensis) trees. Environmental Research Communications, 4, 035005.

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Ward, N.D., Bianchi, T.S., Osburn, C.L., Myers-Pigg, A. (2022). Biogeochemical changes in estuaries. In Climate Change and Estuaries, Edited by Michael Kennish, M.J., Paerl, H.W., Crosswell, J.R..

Indivero, J., Myers-Pigg, A., Ward, N.D. (2021). Seasonal changes in the drivers of water chemistry variability of a small freshwater tidal river. Frontiers in Marine Science.

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Johnson, P., Merle, S.G., Bjorklund, T., Hautala, S.L., Baumberger, T., Liu, J., Ward, N.D., Wang, C. (2021). Methane Plume Emissions from Puget Sound faults within the Cascadia forearc. Geochemistry, Geophysics, Geosystems, 23, e2021GC010211.

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Less. D.F.S., Ward, N.D., Richey, J.E., Cunha, A.C.C. (2021). Influence of seasonal and daily variation of discharge and tide on flow velocity in the Amazon River mouth. Journal of Coastal Research, 37(6), 1181–1192.

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Li, W., Zhang, H., Wang, W., Zhang, P., Ward, N.D., Norwood, M., Myers-Pigg, A., Zhao, C., Leff, R.T., Yabusaki, S., Waichler, S., Bailey, V.L., McDowell, N.G. (2021). Changes in carbon and nitrogen metabolism during seawater-induced mortality of Picea sitchensis trees. Tree Physiology.

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Norwood, M.J., Ward, N.D., McDowell, N.G., Myers-Pigg, A.N., Bond-Lamberty, B., Pennington. S., Wang, W., Kirwan, M., Hopple, A.M., Megonigal, J.P. (2021). Coastal forest seawater exposure increases stem methane concentration. Journal of Geophysical Research: Biogeosciences, 126, e2020JG005915.

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Regier, P., Ward, N.D., Indivero, J., Wiese Moore, C., Norwood, M., Myers-Pigg, A. (2021). Biogeochemical control points of connectivity between a tidal creek and its floodplain. Limnology & Oceanography: Letters, 6 (3), 134-142.

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Sawakuchi, H.O., Bastviken, D., Enrich-Prast, A., Ward, N.D., Richey, J.E. (2021). Low diffusive methane emissions from the main channel of a large Amazonian run-of-the-river reservoir attributed to high methane oxidation. Frontiers in Environmental Science.

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Sengupta, A., Stegen, J., Bond-Lamberty, B., Rivas-Ubach, A., Zheng, J., Handakumbura, P., Norris, C., Peterson, M.J., Yabusaki, S., Bailey, V., Ward, N.D. (2021). Antecedent conditions determine the biogeochemical response of coastal soils to seawater exposure. Soil Biology & Biochemistry, 153, 108104.

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Tagestad, J., Ward, N.D., Butman, D., Stegen, J.C. (2021). Small streams dominate US tidal reaches and will be disproportionately impacted by sea-level rise. Science of the Total Environment, 753, 141944.

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Zhang, P., McDowell, N.G., Zhou, X., Wang, W., Leff, R.T., Pivovaroff, A.L., Zhang, H., Chow, P.S., Ward, N.D., Indivero, J., Yabusaki, S., Waichler, S., Bailey, V.L. (2021). Declining carbohydrate content of Sitka-spruce trees dying from seawater exposure. Plant Physiology, Kiab002.

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Valerio, A.M., Kampel, M., Ward, N.D., Sawakuchi, H.O., Cunha, A.C., Krusche, A.V., Richey, J.E. (2021). CO2 partial pressure and fluxes in the Amazon River Plume using in situ and remote sensing data. Continental Shelf Research, 215, 104348.

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Schafer, T., Ward, N.D., Julian, P., Reddy, K.R., Osborne, T.Z. (2020). Impacts of hurricane disturbance on water quality across the aquatic continuum of a black-water river to estuary complex. Journal of Marine Science and Engineering, 8(12).

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Silva, G.C.X., Abreu, H.M., Ward, N.D., Cunha, H.F.A., Brito, D.C., Cunha, A.C. (2020). Environmental impacts of dam reservoir filling in the East Amazon. Frontiers in Water, 2(11).

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Wang, W., McDowell, N., Pennington, S., Grossiord, C., Leff, R., Ward, N.D., Megonigal, J.P., Bond-Lamberty, B., Bailey, V. (2020). Tree growth, transpiration, and water-use efficiency between shoreline and upland red maple (Acer rubrum) trees in a coastal forest. Agricultural and Forest Meteorology, 295, 108163.

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Ward, N.D., Megonigal, J.P., Bond-Lamberty, B., Bailey, V., Butman, D., Canuel, E.A., Diefenderfer, H., Ganju, N.K., Goñi, M.A., Graham, E.B., Hopkinson, C.S., Khangaonkar, T., Langley, J.A., McDowell, N.G., Myers-Pigg, A.N., Neumann, R.B., Osburn, C.L.,, Price, R.M., Rowland, J., Sengupta, A., Simard, M., Thornton, P.E., Tzortziou, M., Vargas, R., Wesienhorn, P.B., Windham-Myers, L. (2020). Representing the function and sensitivity of coastal interfaces in Earth System Models. Nature Communications, 11 (2458).

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Ward, N.D., Bianchi, T.S., Martin, J.B., Quintero, C.J., Sawakuchi, H.O., Cohen, M. (2020). Pathways for methane emissions and oxidation that influence the net carbon balance of a subtropical cypress swamp. Frontiers in Earth Science, 8, 573357.

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Yabusaki, S., Myers-Pigg, A., Ward, N.D., Waichler, S.R., Sengupta, A., Hou, Z., Chen, X., Fang, Y., Duan, Z., Serkowski, J., Indivero, J., Wiese Moore, C., Gunn, C. (2020). Floodplain inundation and salinization from a recently restored first-order tidal stream. Water Resources Research, 56, e2019WR026850.

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Zayas-Santiago, C., Rivas-Ubach, A., Kuo, L.J., Ward, N.D., Zimmerman, R.C. (2020). Metabolic profiling reveals biochemical pathways responsible for eelgrass response to elevated CO2 and temperature. Scientific Reports, 10 (4693).

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Arellano, A.R., Bianchi, T.S., Osburn, C.L., D’Sa, E.J., Oviedo-Vargas, D., Ward, N.D., Joshi, I., Ko, D., Shields, M.R., Kurian, G., Green, J. (2019). Mechanisms of blue carbon export in estuaries with contrasting carbon sources. Journal of Geophysical Research: Biogeosciences, 124(10), 3168-3188.

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Araújo, K.R., Sawakuchi, H.O., Bertassoli Jr., D.J., Sawakuchi, A.O., da Silva, K.D., Bernardi, T.V., Ward, N.D., Pereira, T.S. (2019). Carbon dioxide (CO2) concentrations and emission in the newly constructed Belo Monte hydropower complex in the Xingu River, Amazonia. Biogeosciences, 16(18), 3527-3542.

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Bianchi, T.S., Ward, N.D. (2019). Editorial: The Role of Priming in Terrestrial and Aquatic Ecosystems. Frontiers in Earth Science, 7(32).

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Bond-Lamberty, B., Pennington, S., Jian, J., Megonigal, P., Sengupta, A., Ward, N.D. (2019). Soil respiration variability and correlation across a wide range of temporal scales. Journal of Geophysical Research: Biogeosciences, 124(10), 3168-3188.

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Coppola, A.I., Seidel, M., Ward, N.D., Viviroli, D., Haghipour, N., Nascimento, G.S., Jones, M., Revells, B.N., Abiven, S., Jones, M., Richey, J.E., Eglinton, T.I., Dittmar, T., Schmidt, M.W.I. (2019). Marked isotopic variability within and between the Amazon River and marine dissolved black carbon pools. Nature Communications, 10(4018).

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Chamberlain, C., Bianchi, T.S., Brown, A.L., Cohen, M.J., Dong, X., Flint, M.K., Martin, J.B., McLaughlin, D.L., Murray, A.B., Pain, A., Quintero, C., Ward, N.D., Zhang, X., Heffernan, J.B. (2019). Mass balance implies Holocene development of a low-relief karst patterned landscape. Chemical Geology, 527(20), 118774.

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Dong, X., Cohen, M.J., Martin, J.B., McLaughlin, D.L., Murray, A.B., Ward, N.D., Flint, M.K., Heffernan, J.B. (2019). Ecohydrologic processes and soil thickness feedbacks control limestone-weathering rates in a karst landscape. Chemical Geology, 527 (20), 118774.

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Kuhn, C.,, Valerio, A., Ward, N.D., Loken, L., Sawakuchi, H.O., Kampel, M., Richey, J.E., Stadler, P., Crawford, J., Striegl, R.G., Vermote, E., Pahlevan, N., Butman, D. (2019). Performance of Landsat-8 and Sentinel-2 surface reflectance products for river remote sensing retrievals of chlorophyll-a and turbidity. Remote Sensing of Environment, 224, 104-118.

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Sengupta, A., Indivero, J., Gunn, C., Tfaily, M., Chu, R., Toyoda, J., Bailey, V., Ward, N.D., Stegen, J.C. (2019). Spatial gradients in soil-carbon character of a coastal forested floodplain are associated with abiotic features, but not microbial communities. Biogeosciences, 16 (19), 3911-3928.

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Wang, W., McDowell, N.G., Ward, N.D., Indivero, J., Gunn, C., Bailey, V. (2019). Constrained tree growth and gas exchange of seawater‐exposed forests in the Pacific Northwest, USA. Journal of Ecology, 107 (6), 2541-2552.

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Ward, N.D., Sawakuchi, H.O., Richey, J.E., Keil, R.G., Bianchi, T.S. (2019). Enhanced aquatic respiration rates associated with mixing of clearwater tributary and turbid Amazon River waters. Frontiers in Earth Science, 7 (101).

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Ward, N.D., Indivero, J., Gunn, C., Wang, W., Bailey, V., McDowell, N.G. (2019). Longitudinal gradients in tree stem greenhouse gas concentrations across six Pacific Northwest coastal forests. Journal of Geophysical Research: Biogeosciences, 124 (6), 1401-1412.

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Ward, N.D., Morrison, E., Liu, Y.,, Rivas-Ubach, A., Osborne, T.Z., Ogram, A., Bianchi, T.S. (2019). Marine microbial responses related to wetland carbon mobilization in the coastal zone. Limnology & Oceanography: Letters, 4, 25-33.

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Zhang, X., Bianchi, T.S., Cohen, M., Martin, J.B., Quintero, C.J., Brown, A.L., Ares, A.M., Ward, N.D., Osborne, T.Z., Heffernan, J.B. (2019). Initiation and development of wetlands in southern Florida karst landscape associated with accumulation of organic matter and vegetation evolution. Journal of Geophysical Research: Biogeosciences, 124 (6), 1604-1617.

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Galeron, M.-A., Radakovitch, O., Charrière, B., Volkman, J.K., Bianchi, T.S., Ward, N.D., Medeiros, P.M., Sawakuchi, H.O., Tank, S., Rontani, J.-F. (2018). Lipoxygenase-induced autoxidative degradation of terrestrial particulate organic matter in estuaries: a widespread process enhanced at high and low latitudes. Organic Geochemistry, 115 (6), 78-92.

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Joshi, I., Ward, N.D., D’Sa, E.J., Osburn, C.L., Bianchi, T.S., Oviedo-Vargas, D. (2018). Seasonal trends in surface pCO2 and air-sea CO2 fluxes in Apalachicola Bay, Florida from VIIRS ocean color. Journal of Geophysical Research: Biogeosciences, 123 (8), 2466-2484.

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Valerio, A.M., Kampel, M., Vantrepotte, V., Ward, N.D., Sawakuchi, H.O., Less, D.F., Neu, V., Cunha, A., Richey, J.E. (2018). Using CDOM optical properties for estimating DOC concentrations and pCO2 in the Lower Amazon River. Optics Express, 26 (14), A657.

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Ward, N.D., Sawakuchi, H.O., Richey, J.E. (2018). The Amazon River’s ecosystem—where land meets the sea. Eos, 99.

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Ward, N.D., Sawakuchi, H.O., Neu, V., Less, D., Valerio, A.M., Cunha, A.C., Kampel, M., Bianchi, T.S., Krusche, A.V., Richey, J.E., Keil, R.G. (2018). Velocity-amplified microbial respiration rates in the lower Amazon Rive. Limnology & Oceanography: Letters, 3 (3), 265-274.

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Bianchi, T.S., Butman, D., Raymond, P., Ward, N.D., Kates, R., Flessa, K.W.,, Zamora, H.,, Arellano, A., Ramirez, J., Rodriguez, E. (2017). The experimental flow to the Colorado River delta: effects on carbon cycling in a dry watercourse. Journal of Geophysical Research: Biogeosciences, 122 (3), 607-627.

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Doherty, M., Yager, P.L., Moran, M.A., Satinsky, B.M., Payet, J.P., Ward, N.D., Sawakuchi, H.O., Fortunato, C., Richey, J.E., Crump, B.C. (2017). Bacterial biogeography across the Amazon river-to-ocean continuum. Frontiers in Microbiology, 8 (882).

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Duan, S.W., He, Y., Kaushal, S.S., Bianchi, T.S., Ward, N.D., Guo, L., Findlay, S.E.G. (2017). Impact of wetland decline on decreasing dissolved organic carbon concentrations along the Mississippi River continuum. Frontiers in Marine Science, 3 (280).

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Gagne-Maynard, W., Ward, N.D., Keil, R.G., Sawakuchi, H.O., Cunha, A.C., Neu, V., Brito, D.C., Less, D., Diniz, J., Valerio, A.M., Kampel, M., Krusche, A.V., Richey, J.E. (2017). Evaluation of primary production in the lower Amazon River based on a dissolved oxygen stable isotopic mass balance. Frontiers in Marine Science, 4 (26).

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Joshi, I., D’Sa, E.J., Osburn, C.L., Bianchi, T.S., Ko, D., Oviedo-Vargas, D., Arellano, A., Ward, N.D. (2017). Assessing chromophoric dissolved organic matter (CDOM) distributions, stocks, and fluxes in Apalachicola Bay using combined field, VIIRS ocean color, and model observations. Remote Sensing of Environment, 191, 359-372.

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Satinsky, B., Smith, C.B., Sharma, S., Ward, N.D., Krusche, A.V., Richey, J.E., Yager, P.L., Crump, B.C., Moran, M.A. (2017). Patterns of bacterial and archaeal gene expression through the lower Amazon River. Frontiers in Marine Science, 4 (253).

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Sawakuchi, H.O., Neu, V., Ward, N.D., Barros, M.L.C., Valerio, A.M., Gagne-Maynard, W., Cunha, A.C., Less, D.F., Diniz, J.E., Brito, D.C., Krusche, A.V., Richey, J.E. (2017). Carbon dioxide emissions along the lower Amazon River. Frontiers in Marine Science, 4 (76).

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Silva, B.S.O., Coutinho, F.H., Gregoracci, G.B., Leomil, L., Oliveira, L.S.d.O., Froes, A.M., Tschoeke, D., Soares, A.C., Cabral, A.S., Ward, N.D., Richey, J.E., Krusche, A.V., Yager, P.L., Rezende, C.E. (2017). Virioplankton Assemblage Structure in the Lower River and Ocean Continuum of the Amazon. mSphere, 2 (5), e00366-17.

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Ward, N.D., Bianchi, T.S., Medeiros, P.M., Seidel, M., Richey, J.E., Keil, R.G., Sawakuchi, H.O. (2017). Where carbon goes when water flows: Carbon cycling across the aquatic continuum. Frontiers in Marine Science, 4 (7).

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Ward, N.D. (2017). Editorial: Integrative research on organic matter cycling across aquatic gradients. Frontiers in Marine Science, 4 (131).

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Neu, V., Ward, N.D., Krusche, A.V., Neill, C. (2016). Dissolved organic and inorganic carbon flow paths in an Amazonian transitional forest. Frontiers in Marine Science, 4 (115).

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Sawakuchi, H.O., Bastviken, D., Sawakuchi, A.O., Ward, N.D., Borges, C., Tsai, S.M., Richey, J.E., Ballester, M.V.R., Krusche, A.V. (2016). Oxidative mitigation of methane evasion in large Amazonian rivers. Global Change Biology, 22 (3).

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Seidel, M., Dittmar, T., Ward, N.D., Krusche, A.V., Richey, J.E., Yager, P.L., Medeiros, P.M. (2016). Seasonal and spatial variability of dissolved organic matter in the lower Amazon River. Biogeochemistry, 131 (3), 281-302.

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Ward, N.D., Bianchi, T.S., Sawakuchi, H.O., Gagne-Maynard, W., Cunha, A.C., Brito, D.C., Neu, V., Valerio, A.M., da Silva, R., Krusche, A.V., Richey, J.E., Keil, R.G. (2016). The reactivity of plant-derived organic matter and the potential importance of priming effects in the lower Amazon River. Journal of Geophysical Research: Biogeosciences, 121, 1522-1539.

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Bianchi, T.S., Thornton, D., Yvon-Lewis, S., King, G., Eglinton, T., Shields, M., Ward, N.D., Curtis, J. (2015). Positive priming of terrestrially-derived dissolved organic matter in a freshwater microcosm system. Geophysical Research Letters, 42 (13), 5460-5467.

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Medeiros, P.M., Seidel, M., Ward, N.D., Carpenter, E.J., do Rosário Gomes, H., Niggemann, J., Krusche, A.V., Richey, J.E., Yager, P.L., Dittmar, T. (2015). Fate of Amazon River dissolved organic matter in the Tropical Atlantic Ocean. Global Biogeochemical Cycles, 29 (5), 677-690.

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Satinsky, B.M., Fortunato, C.S., Doherty, M., Smith, C.B., Sharma, S.,, Richey, J.E., Ward, N.D., Krusche, A.V., Moran, M.A., Crump, B.C. (2015). Metagenomic and metatranscriptomic inventories of the Amazon River, May 2011. Microbiome, 3 (39), 677-690.

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Seidel, M., Yager, P.L., Ward, N.D., Carpenter, E.J., Gomes, H.R., de Rezende, C.E., Krusche, A.V., Richey, J.E., Dittmar, T., Medeiros, P.M. (2015). Molecular level transformations of dissolved organic matter in the river to ocean continuum of the Amazon. Marine Chemistry, 177 (2), 218-231.

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Ward, N.D., Krusche, A.V., Sawakuchi, H.O., Brito, D.C., Cunha, A.C., Moura, J.M.S., da Silva, R., Yager, P.L., Keil, R.G., Richey, J.E. (2015). The compositional evolution of dissolved and particulate organic matter along the lower Amazon River-Óbidos to the ocean. Marine Chemistry, 177 (2), 244-256.

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Ward, N.D., Petrik-Finley, R.J. (2015). Integrating local environmental research into an inquiry-based unit on biogeochemical principles in a high school science classroom. The Earth Scientist-NESTA, 31(2), 21-28.

Ward, N.D., Petrik-Finley, R.J., Keil, R.G., Clay, T.G. (2013). Benefits and limitations of iPads in the high school science classroom and a trophic cascade lesson plan. Journal of Geoscience Education, 61(4), 378-384.

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Ward, N.D., Keil, R.G., Medeiros, P.M., Brito, D.C., Cunha, A.C., Dittmar, T., Yager, P.L., Krusche, A.V., Richey, J.E. (2013). Degradation of terrestrially derived macromolecules in the Amazon River. Nature Geoscience, 6 (7), 530-533.

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Ward, N.D., Keil, R.G., Richey, J.E. (2012). Temporal variation in river nutrient and dissolved lignin phenol concentrations and the impact of storm events on nutrient loading to Hood Canal, Washington, USA. Biogeochemistry, 111 (1-3), 629-645.

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