Publications

Google Scholar Profile

Liang, Z., Letscher, R.T., and A.N. Knapp, 2023, Global patterns of surface ocean dissolved organic matter stoichiometry, Global Biogeochemical Cycles, 37, e2023GB007788, doi.org/10.1029/2023GB007788

Broek, T.A.B., M.D. McCarthy, H. L. Ianiri, J.S. Vaughn, H.E. Mason, and A.N. Knapp, 2023, A new paradigm for dissolved organic nitrogen composition, cycling, and persistence in the ocean, Proceedings of the National Academy of Sciences, 120(49), doi.org/10.1073/pnas.2305763120

Forrer, H.J., Bonnet, S., Thomas, R.K., Grosso, O., Guieu, C., and A.N. Knapp, 2023, Quantifying N2 fixation and its contribution to export production near the Tonga-Kermadec Arc using nitrogen isotope budgets, 2023, Frontiers in Marine Science, 10:1249115, doi:10.3389/fmars.2023.1249115

Shao, Z., Xu, Y., Wang, H., Luo, W., Wang, L., Huang, Y., Agawin, N.S.R., Ahmed, A., Benavides, M., Bentzon-Tilia, M., Berman-Frank, I., Berthelot, H., Biegala, I.C., Bif, M.B., Bode, A., Bonnet, S., Bronk, D.A., Brown, M.V., Campbell, L., Capone, D.G., Carpenter, E.J., Cassar, N., Chang, B.X., Chappell, D., Chen, Y.L., Church, M.J., Cornejo-Castilo, F.M., Detoni, A.M.S., Doney, S.C., Dupuoy, C., Estrada, M., Fernandez, C., Fernandez-Castro, B., Fonseca-Batista, D., Foster, R.A., Furuya, K., Garcia, N., Goto, K., Gago, J., Gradoville, M.R., Hamersley, M.R., Henke, B.A., Horstmann, C., Jayakumar, A., Jiang, Z., Kao, S.-J., Karl, D., Kittu, L.R., Knapp, A.N., Kumar, S., LaRoche, J., Liu, H., Liu, J., Lory, C., Loscher, C.R., Maranon, E., Messer, L.F., Mills, M.M., Mohr, W., Moisander, P.H., Mahaffey, C., Moore, R., Mourino-Carballilo, B., Mulholland, M.R., Nakaoka, S.-I., Needoba, J.A., Raes, E.J., Rahav, E., Ramirez-Cardenas, T., Reeder, C.F., Riemann, L., Fiou, V., Robidart, J.C., Sarma, V.V.S.S., Sato, T., Saxena, H., Selden, C., Seymour, J.R., Shi, D., Shiozaki, T., Singh, A., Sipler, R.E., Sun, J., Suzuki, K., Takahashi, K., Tan, Y., Tang, W., Tremblay, J.-E., Turk-Kubo, K., Wen, Z., White, A.E., Wilson, S.T., Yoshida, T., Zehr, J.P., Zhang, R., Luo, Y.-W., 2023, Version 2 of the global oceanic diazotroph database, Earth System Science Data, 15, 3673-3709, doi.org/10.5194/essd-15-3673-2023

Miranda, C., Boiteau, R., McKenna, A.M., and A.N. Knapp, 2023, Quantitative and qualitative comparison of marine dissolved organic nitrogen recovery using solid phase extraction, Limnology and Oceanography: Methods, doi.org/10.1002/lom3.10558

Bonnet, S., Guieu, C., Taillandier, V., Boulart, C., Bouruet-Aubertot, P., Gazeau, F., Scalabrin, C., Bressac, M., Knapp, A.N., Cuypers, Y., Gonzalez-Santana, D., #Forrer, H.J., Grisoni, J.-M., Grosso, O., Habasque, J., Jardin-Camps, M., Leblond, N., Le Moigne, F.A.C., Lebourges-Dhaussy, A., Lory, C., Nunige, S., Pulido-Villena, E., Rizzo, A., Sarthou, G., Tilliette, C., 2023, Natural iron fertilization by shallow hydrothermal sources fuels diazotroph blooms in the Ocean, Science, 380, 812-817, doi.org/10.1126/science.abq4654

Liang, Z., McCabe, K., Fawcett, S., Forrer, H., Hashihama, F., Jeandel, C., Marconi, D., Planquette, H., Saito, M., Sohm, J., Thomas, R., Letscher, R., and Knapp, A.N., 2022, A global ocean dissolved organic phosphorus (DOP) concentration database (DOPv2021), Scientific Data, 9, 722, doi.org/10.1038/s41597-022-01873-7

Letscher, R.T., Wang, W.-L., Liang, Z., and Knapp, A.N., 2022, Regionally variable contribution of dissolved organic phosphorus to marine annual net community production, Global Biogeochemical Cycles, 36, e2022GB007354, doi.org/10.1029/2022GB007354

Liang, Z., Letscher, R.T., and Knapp, A.N., Phosphate and iron stress control global surface ocean dissolved organic phosphorus concentrations, 2022, Nature Geoscience, 15, 651-657, doi:10.1038/s41561-022-00988-1

Gerard, T., Lamkin, J.T., Kelly, T.B., Knapp, A.N., Laiz-Carrion, L., Malca, E., Selph, K.E., Shiroza, A., Shropshire, T.A., Stukel, M.R., Swalethorp, R., Yingling, N., & Landry, M.R.; Bluefin Larvae in Oligotrophic Ocean Foodwebs, Investigations of Nutrients to Zooplankton: Overview of the BLOOFINZ-Gulf of Mexico program, 2022, Journal of Plankton Research, fbac038, doi.org/10.1093/plankt/fbac038

Pinckney, J.L., Zaunbrecher, S., Lang, S., Wilson, A., and A.N. Knapp, Seasonality of benthic macroalgal community abundance in shallow shelf waters, 2022, Continental Shelf Research, 244, 104797, doi.org/10.1016/j.csr.2022.104797

Confesor, K., Selden, C., Powell, K., Donahue, L., Mellett, T., Caprara, S., Knapp, A.N., Buck, K.N, and Chappell, P.D., 2022, Defining the realized niche of the two major clades of Trichodesmium: a study on the West Florida Shelf, Frontiers in Marine Science, 9:821655, doi:10.3389/fmars.2022.821655

Knapp, A.N., Thomas, R.K., Stukel, M.R., Kelly, T.B., Landry, M.R., Selph, K.E., Malca, E., Gerard, T., and Lamkin, J., 2021, Constraining the sources of nitrogen fueling export production in the Gulf of Mexico using nitrogen isotope budgets, Journal of Plankton Research, fbab049, 1-19, doi.org/10.1093/plankt/fbab049

Kelly, T.B., Knapp, A.N., Landry, M.R., Selph, K.E., Shropshire, T., Thomas, R.K., and Stukel, M.R., 2021, Lateral Advection Supports Nitrogen Export in the Oligotrophic Open-Ocean Gulf of Mexico, Nature Communications, 12, 3325, doi.org/10.1038/s41467-021-23678-9

Yingling, N., Kelly, T.B., Shropshire, T.A., Landry, M.R., Selph, K.E., Knapp, A.N., Kranz, S.A., and Stukel, M.R., 2021, Taxon-specific phytoplankton growth, nutrient utilization and light limitation in the oligotrophic Gulf of Mexico, Journal of Plankton Research, fbab028, doi:10.1093/plankt/fbab028

Stukel, M.R., Gerard, T., Kelly, T.B., Knapp, A.N., Laiz-Carrion, R., Lamkin, J.T., Landry, M.R., Malca, E., Selph, K.E., Shiroza, A., Shropshire, T.A., and Swalethorp, R., 2021, Plankton food webs in the oligotrophic Gulf of Mexico spawning grounds of Atlantic bluefin tuna, Journal of Plankton Research, fbab023, doi:10.1093/plankt/fbab023

Selph, K., Swalethorp, R., Stukel, M., Kelly, T., Knapp, A.N., Fleming, K., Hernandez, T., and M. Landry, 2021, Phytoplankton community composition and biomass in the open-ocean Gulf of Mexico, J. Plankton Research, fbab006, doi:10.1093/plankt/fbab006

Santoro, A.E., Buchwald, C., Knapp, A.N., Berelson, W.M., Capone, D.G., and Casciotti, K.L., 2021, Nitrification and nitrous oxide production in the offshore waters of the Eastern Tropical South Pacific, Global Biogeochemical Cycles, 35, e2020GB006716, https://doi.org/10.1029/2020GB006716

Howe, S., C. Miranda, C. Hayes, R. Letscher, and A.N. Knapp, 2020, The dual isotopic composition of nitrate in the Gulf of Meixco and Florida Straits, 125, e2020JC016047, Journal of Geophysical Research-Oceans, doi:10.1029/2020JC016047

White, A.E., J. Granger, C. Selden, M.R. Gradoville, L. Potts, A. Bourbonnais, R.W. Fulweiler, A.N. Knapp, W. Mohr, C.R. Tobias, S.T. Wilson, M. Benavides, S. Bonnet, M. Mulholland, and B.X. Chang, 2020, A review of the 15N2 tracer method to measure diazotrophic production in pelagic ecosystems,Limnology and Oceanography: Methods, 18, 129-147, doi: 10.1002/lom3.10353

Redalje, D., J. Ammerman, J. Herrera, A.N. Knapp, D. Valdes, and A. Hayward, 2019, Nutrients in the Gulf of Mexico: Distributions, Cycles, Sources, Sinks, and Processes. In: Gulf of Mexico Origin, Waters, and Biota: Volume 5: Chemical Oceanography, Thomas Bianchi, Editor. Texas A&M Press.

Wilson, S. T., Hawco, N. J., Armbrust, E. V., Barone, B., Bjorkman, K. M., Boysen, A. K., Burgos, M., Burrell, T. J., Casey, J. R., DeLong, E. F., Dugenne, M., Dutkiewicz, S., Dyhrman, S. T., Ferron, S., Follows, M. J., Foreman, R. K., Funkey, C. P., Harke, M. J., Henke, B. A., Hill, C. N., Hynes, A. M., Ingalls, A. E., Jahn, O., Kelly, R. L., Knapp, A. N., Letelier, R. M., Ribalet, F., Shimabukuro, E. M., Tabata, R. K. S., Turk-Kubo, K. A., White, A. E., Zehr, J. P., John, S., & Karl, D. M. (2019). Kilauea lava fuels phytoplankton bloom in the North Pacific Ocean. Science, 365, 1040-1044

See associated "Perspective" by Ducklow and Plank

Welch, A.W., A.N. Knapp, S. El-Tourky, Z. Daughtery, G. Hitchcock, and D. Benetti, 2019, The nutrient footprint of a submerged cage offshore aquaculture facility located in the tropical Caribbean, Journal of the World Aquaculture Society, 50(2) 1-18, doi:10.1111/jwas.12593

Knapp, A.N., K.L. Casciotti, and M.G. Prokopenko, Dissolved organic nitrogen production and consumption in eastern tropical South Pacific surface waters, 2018, Global Biogeochemial Cycles, 32, doi:10.1029/2017GB005875

Knapp, A.N., K.M. McCabe, O. Grosso, N. Leblond, T. Moutin, and S. Bonnet, Distribution and rates of nitrogen fixation in the western tropical South Pacific Ocean constrained by nitrogen isotope budgets, 2018, Biogeosciences, 15, 2619-2628, doi:10.5194/bg-2619-2018

Marconi, D., D. Sigman, K. Casciotti, E. Campbell, M. Weigand, S. Fawcett, A. Knapp, P. Rafter, B. Ward, and G. Haug, Tropical dominance of N2 fixation in the North Atlantic Ocean, 2017, Global Biogeochemical Cycles, 31, doi:10.1002/2016GB005613

Fassbender, A.J., H.I. Palevsky, T.R. Martz, A.E. Ingalls, M. Gledhill, S.E. Fawcett, J. Brandes, L. Aluwihare, and the participants of COME ABOARD, DISCO XXV, Perspectives on Chemical Oceanography in the 21st century: Participants of the COME ABOARD Meeting examine aspects of the field in the context of 40 years of DISCO, 2017, Marine Chemistry, 196, 181-190, doi:10.1016/j.marchem.2017.09.002

Knapp, A.N., S.E. Fawcett, A. Martinez-Garcia, N. Leblond, T. Moutin, and S. Bonnet, Nitrogen isotopic evidence for a shift from nitrate- to diazotroph-fueled export production in the VAHINE mesocosm experiments, 2016, Biogeosciences, 13, 4645-4657, doi:10.5194/bg-13-4645-2016

Haskell, W.Z., M.G. Prokopenko, R.H.R. Stanley, and A.N. Knapp, Estimates of vertical turbulent mixing used to determine a vertical gradient in net and gross oxygen production in the oligotrophic South Pacific Gyre, 2016, Geophysical Research Letters, 43, doi:10.1002/2016GL069523

Knapp, A.N., K.L. Casciotti, W.M. Berelson, M.G. Prokopenko, and D.G. Capone, Low rates of nitrogen fixation in the eastern tropical South Pacific surface waters, 2016, Proceedings of the National Academy of Sciences, 113, 4398-4403, doi:10.1073/pnas.1515641113

Letscher, R.T., A.N. Knapp, A.K. James, C.A. Carlson, A.E. Santoro, and D.A. Hansell, 2015, Microbial community composition and nitrogen availability influence DOC remineralization in the South Pacific Gyre, Marine Chemistry, 177, 325-334, doi:10.1016/j.marchem.2015.06.024

Berelson, W.M., W. Haskell, M.G. Prokopenko, A.N. Knapp, D. Hammond, N. Rollins, D.G. Capone, 2015, Biogenic rain and benthic remineralization in the Eastern Tropical South Pacific, Deep-Sea Research I, 99, 23-34, doi:10.1016/j.dsr.2014.12.006.

Haskell, W.Z., D. Kadko, D.E. Hammond, A.N. Knapp, M.G. Prokopenko, W.M. Berelson, and D.G. Capone, 2015, Upwelling velocity and eddy diffusivity from 7Be measurements used to compare vertical nutrient flux to export POC flux in the Eastern Tropical South Pacific, Marine Chemistry, 168, 140-150, doi: 10.1016/j.marchem.2014.10.004

Johnston, D.T., B.C. Gill, A. Masterson, E. Beirne, K.L. Casciotti, A.N. Knapp, and W. Berelson, 2014, Placing an upper limit on cryptic sulphur cycling, Nature, 513, 530-533, doi:10.1038/nature13698

Jacquot, J.E., Y. Kondo, A.N. Knapp, and J.W. Moffett, 2013, The speciation of copper across active gradients in nitrogen-cycle processes in the eastern tropical South Pacific, Limnology & Oceanography, 58, 1387-1394

Letscher, R.T., D.A. Hansell, C.A. Carlson, R. Lumpkin, and A.N. Knapp, 2013, *Dissolved organic nitrogen in the global surface ocean: Distribution and fate, Global Biogeochem. Cycles, 27, doi/10.1029/2012GB004449/

*See associated Nature "News and Views" article by Voss and Heitanen

Knapp, A.N., 2012, The sensitivity of marine N2 fixation to dissolved inorganic nitrogen, Frontiers in Microbiology, 3:374. doi: 10.3389/fmicb.2012.00374

Knapp, A.N., J. Dekaezemacker, S. Bonnet, J.A. Sohm, and D.G. Capone, 2012, Sensitivity of Trichodesmium and Crocosphaera abundance and N2 fixation rates to varying NO3- and PO43- concentrations in batch cultures, Aquatic Microbial Ecology, 66, 223-236, doi:10.3354/ame01577

Knapp, A.N., D.M. Sigman, A.B. Kustka, S.A. Sanudo-Wilhelmy, and D.G. Capone, 2012, The distinct nitrogen isotopic compositions of low and high molecular weight DON, Marine Chemistry, 136-137, 24-33, doi:10.1016/j.marchem.2012.05.001

Knapp, A.N., D.M. Sigman, F. Lipschultz, A.B. Kustka, and D.G. Capone, 2011, Interbasin isotopic correspondence between upper-ocean bulk DON and subsurface nitrate and its implications for marine nitrogen cycling, Global Biogeochemical Cycles, 25, GB4004, doi:10.1029/2010GB003878

Collins, L.E., W. Berelson, D.E. Hammond, A. Knapp, R. Schwartz, and D. Capone, 2011, Particle fluxes in San Pedro Basin, California: A four-year record of sedimentation and physical forcing, Deep-Sea Research I, 58, 898-914.

Knapp, A.N., M.G. Hastings, D.M. Sigman, F. Lipschultz and J.N. Galloway, 2010, The flux and isotopic composition of reduced and total nitrogen in Bermuda rain, Marine Chemistry, 120, 83-89, doi:10.1016/j.marchem.2008.08.007 (Published online in final form in 2008)

Spencer, P.K., and A.N. Knapp, 2010, Sedimentology, New stratigraphic markers in the late Pleistocene Palouse loess: novel fossil gastropods, absolute age constraints, and non-eolian facies, 57, 41-52,doi:10.1111/j.1365-3091.2009.01085.x

Sigman, D.M., P.J. DiFiore, M.P. Hain, C. Deutsch, Y. Wang, D.M. Karl, A.N. Knapp, M.F. Lehmann, and S. Pantoja, 2009, The dual isotopes of deep nitrate as a constraint on the cycle and budget of oceanic fixed nitrogen. Deep-Sea Res. I, 56, 1419-1439, doi:10.1016/j.dsr.2009.04.007

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