Publications

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.

DOI

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.

DOI

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.

DOI

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.

DOI

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.

DOI

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.

DOI

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.

DOI

Richey, J.E., Spencer, R., Drake, T.W., Ward, N.D. (2021). 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..

DOI

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.

DOI

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.

DOI

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.

DOI

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.

DOI

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.

DOI

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).

DOI

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).

DOI

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.

DOI

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).

DOI

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.

DOI

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.

DOI

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).

DOI

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.

DOI

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.

DOI

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

DOI

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.

DOI

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).

DOI

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.

DOI

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.

DOI

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.

DOI

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.

DOI

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.

DOI

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).

DOI

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.

DOI

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.

DOI

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.

DOI

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.

DOI

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.

DOI

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.

DOI

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

DOI

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.

DOI

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.

DOI

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).

DOI

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).

DOI

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).

DOI

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.

DOI

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).

DOI

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).

DOI

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.

DOI

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).

DOI

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

DOI

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).

DOI

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).

DOI

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.

DOI

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.

DOI

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.

DOI

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.

DOI

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.

DOI

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.

DOI

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.

DOI

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.

DOI

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.

DOI

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.

DOI