Kübert, A., Dubbert, M., Bamberger, I., Kühnhammer, K., Beyer, M., van Haren, J., Bailey, K., Hu, J., Meredith, L.K., Ladd, S.N., Werner, C. (2023) “Tracing plant source water dynamics during drought by continuous transpiration measurements: an in-situ stable isotope approach.” Plant, Cell & Environment 46, 133-149. DOI: 10.1111/pce.14475
Byron, J., Kreuzwieser, J., Purser, G., van Haren, J., Ladd, S.N., Meredith, L., Werner, C., Williams, J. (2022) “Chiral monoterpenes reveal forest emission mechanisms and drought responses.” Nature 609, 307-312. DOI: 10.1038/s41586-022-05020-5
He, D., Ladd, S.N., Park, J.*, Sachs, J.P., Simoneit, B.R.T., Smoak, J.M., Jaffé, R. (2022) “Carbon and hydrogen isotopes of taraxerol in mangrove leaves and sediment cores: implications for paleo-reconstructions.” Geochimica et Cosmochimica Acta 324, 262-279. DOI: 10.1016/j.gca.2022.02.018
Honeker, L., Hildebrand, G., Fudyma, J., Daber, E., Hoyt, D., Flowers, S., Gil Loaiza, J., Kübert, A., Bamberger, I., Anderton, C., Cliff, J., Leichty, L., Amini Tabrizi, R., Kreuzwieser, J., Shi, L., Bai, X., Velickovic, D., Dippold, M., Ladd, S.N., Werner, C., Meredith, L., Tfaily, M. (2022) “Elucidating drought tolerance mechanisms in plant roots through 1H-NMR metabolomics, MALDI-MS, and NanoSIMS imaging technologies.” Environmental Science & Technology 56, 2021-2032. DOI: 10.1021/acs.est.1c06772
Hudson, C.M., Ladd, S.N., Leal, M.C., Schubert, C.J., Seehausen, O., Matthews, B. (2022) “Fit and fatty freshwater fish: Contrasting polyunsaturated fatty acid phenotypes between hybridizing stickleback lineages.” Oikos 2022: e08558. DOI: 10.1111/oik.08558
Werner, C.ψ, Meredith, L.K.ψ, Ladd, S.N.ψ, Ingrisch, J., Kübert, A., van Haren, J., Bahn, M., Bailey, K., Bamberger, I., Beyer, M., Blomdahl, D., Byron, J., Daber, E., Deleeuw, J., Dippold, M.A., Fudyma, J., Gil-Loazia, J., Honeker, L.K., Hu, J., Huang, J., Klüpfel, T., Krechmer, J., Kreuzwieser, J., Kühnhammer, K., Lehmann, M.M., Meeran, K., Misztal, P.K., Ng, W.-R., Pfannerstill, E., Pugliese, G., Purser, G., Roscioli, J., Shi, L., Tfaily, M., Williams, J. (2021) “Ecosystem fluxes during drought and recovery in an experimental forest.” Science 374, 1514-1518. DOI: 10.1126/science.abj6789 (ψEqual contributions)
Ladd, S.N., Nelson, D.B., Bamberger, I., Daber, L.E.*, Kreuzwieser, J., Kahmen, A., and Werner, C. (2021).”Metabolic exchange between pathways for isoprenoid synthesis and implications for biosynthetic hydrogen isotope fractionation.” New Phytologist 231, 1708-1719. DOI:10.1111/nph.17510
Twining, C.W., Bernhardt, J.R., Derry, A.M., Hudson, C.M., Ishikawa, A., Kabeya, N., Kainz, M., Kitano, J., Kowarik, C., Ladd, S.N., Leal, M.C., Scharnweber, K., Shipley, J.R., Matthews, B. (2021) “The evolutionary ecology of fatty-acid variation: implications for consumer adaptation and diversification.” Ecology Letters 24, 1709-1731. DOI: 10.1111/ele.13771
Madeira, C., Madeira, D., Ladd, N., Schubert, C.J., Diniz, M., Vinagre, C., and Leal, M.C. (2021) “Conserved fatty acid profiles and lipid metabolic pathways in a tropical reef fish exposed to ocean warming – an adaptation mechanism of tolerant species?” Science of the Total Environment 782, 146738. DOI: https://doi.org/10.1016/j.scitotenv.2021.146738
Ladd, S.N., Maloney, A.E., Nelson, D.B., Prebble, M., Camperio, G.*, Sear, D.A., Hassall, J., Langdon, P.G., Sachs, J.P., and Dubois, N. (2021) “Leaf Wax Hydrogen Isotopes as a Hydroclimate Proxy in the Tropical Pacific.” JGR-Biogeosciences 126, e2020JG005891. DOI: https://doi.org/10.1029/2020JG005891
He, D., Ladd, S.N., Saunders, C.J., Mead, R.N., Jaffé, R. (2020) “Distribution of n-alkanes and their δ2H and δ13C values in typical plants across the Everglades terrestrial-coastal-oceanic gradient: implications for paleo-reconstruction.” Geochimica et Cosmochimica Acta 281, 31-52. DOI: https://doi.org/10.1016/j.gca.2020.05.003
Haas M.*, Boltshauser-Kaltenrieder P., Ladd N., Welte C., Strasser M., Eglinton T.I., Dubois N. (2020) “Land-use evolution in the catchment of Lake Murten, Switzerland.” Quaternary Science Reviews 230, 106154. DOI: 10.1016/j.quascirev.2019.106154
Guillemot, T., Stockhecke, M., Bechtel, A., Ladd, S.N., Nelson, D.B., Schubert, C.J. (2019) “Paleoenvironmental and paleoclimatic variations around Lake Van (Eastern Turkey) recorded by sedimentary source specific biomarkers 250- 130 ka (MIS7 and MIS6).” Quaternary Science Reviews 225, 105997. DOI: 10.1016/j.quascirev.2019.105997
Ishikawa A., Kabeya N., Ikeya K., Kakioka R., Cech J., Osada N., Leal M., Kume M., Toyoda A., Tezuka A., Nagano A., Yamasaki Y., Suzuki Y., Kokita T., Takahashi H., Lucek K., Marques D., Takehana Y., Naruse K., Mori S., Monroig O., Ladd N., Schubert C., Matthews B., Peichel C., Seehausen O., Yoshizaki G., Kitano J. (2019) “A key role for a fatty acid desaturase Fads2 in stickleback freshwater colonization.” Science 364, 886-889. DOI: 10.1126/science.aau5656
Krentscher, C.*, Dubois, N., Camperio, G.*, Prebble, M., Ladd, S.N. (2019) “Palmitone as a species-specific biomarker for the crop plant taro (Colocasia esculenta Schott.) on remote Pacific islands.” Organic Geochemistry 132, 1-10. DOI: 10.1016/j.orggeochem.2019.03.006
Park, J.*, Ladd, S.N., Sachs, J.P. (2019) “Hydrogen and Carbon Isotope Responses to Salinity in Greenhouse-grown Mangroves.” Organic Geochemistry 132, 23-36 DOI: 10.1016/j.orggeochem.2019.03.001
Ladd S.N., Nelson D.B., Schubert C.J., and Dubois N. (2018) “Lipid compound classes display diverging hydrogen isotope responses in lakes along a nutrient gradient.” Geochim. Cosmochim. Acta 237, 103-119. DOI: 10.1016/j.gca.2018.06.005
Nelson, D., Ladd S.N., Schubert, C.J., and Kahmen, A. (2018) “Rapid transport and large-scale deposition of recently synthesized plant biomarkers through aerosol processes.” Geochimica et Cosmochimica Acta 222, 599-617. DOI: 10.1016/j.gca.2017.11.018
Ladd, S.N., Dubois, N., and Schubert, C.J. (2017) “Interplay of community dynamics, temperature, and productivity on hydrogen isotope signatures of lipid biomarkers.” Biogeosciences 14, 3979-3994. DOI:10.5194/bg-14-3979-2017
He, D., Ladd, S.N., Sachs, J.P., and Jaffé, R. (2017) “Inverse relationships between salinity and 2H/1H fractionation in leaf wax n-alkanes from Florida mangroves.” Organic Geochemistry 110, 1-12. DOI:10.1016/j.orggeochem.2017.04.007
Ladd, S.N. and Sachs, J.P. (2017) “2H/1H fractionation in lipids of the mangrove Bruguiera gymnorhiza increases with salinity in marine lakes of Palau.” Geochimica et Cosmochimica Acta 204, 300-312. DOI: 10.1016/j.gca.2017.01.046
Ladd, S.N. and Sachs, J.P. (2015) “Influence of salinity on hydrogen isotope fractionation in Rhizophora mangroves from Micronesia.” Geochimica et Cosmochimica Acta 168, 206-221, DOI:10.1016/j.gca.2015.07.004
Ladd, S.N. and Sachs, J.P. (2015) “Hydrogen isotope response to changing salinity and rainfall in Australian mangroves.” Plant, Cell & Environment 38, 2674-2687, DOI:10.1111/pce.12579
Myrhvold, C.L., Janny, F., Nelson, D., Ladd S.N., Atwood, A., and Sachs, J.P. (2014) “Holocene Closure of Lib Pond, Marshall Islands.” PLoS One 9(3): e90939. DOI: 10.1371/journal.pone.0090939
Ladd, S.N. and Sachs, J.P. (2013) “Positive correlation between salinity and n-alkane δ13C values in the mangrove Avicennia marina.” Organic Geochemistry 64, 1-8, DOI: 10.1016/j.orggeochem.2013.08.011
Ladd, S.N. and Sachs, J.P. (2012) “Inverse relationship between salinity and n-alkane δD values in the mangrove Avicennia marina.” Organic Geochemistry 48, 25-36, DOI: 10.1016/j.orggeochem.2012.04.009
Sachs, J.P. and Ladd, S.N. (2010) “Climate and oceanography of the Galapagos in the 21st century: expected changes and research needs.” Galapagos Research 67, 50-54
Manuscripts under review or in revision
Huang, J., Ladd, S.N., Ingrisch, J., Kübert, A., Meredith, L.K., van Haren, J., Bamberger, I., Daber, L.E., Bailey, K., Hu, J., Fudyma, J., Shi, L., Dippold, M., Meeran, K., Miller, L., O’Brien, M.J., Yang, H., Herrera-Ramirez, D., Hartmann, H., Trumbore, S., Bahn, M., Werner, C., Lehmann, M.M. “13CO2 pulse-labeling reveals that drought inhibits carbohydrate export and transport from source to sink organs in an experimental rainforest.” In review at Nature Communications.
Ladd, S.N.ψ, Daber, L.E.ψ, Bamberger, I., Kübert, A., Kruezwieser, J., Persor, G., Ingrisch, J., Deleeuw, J., van Haren, J., Meredith, L.K., Werner, C. “Leaf-level metabolic changes in response to drought affect daytime CO2 emission and isoprenoid synthesis.” In revision. (ψEqual contributions). Pre-print available: https://www.biorxiv.org/content/10.1101/2022.04.29.490001v2
Honeker, L., Pugliese, G., Ingrisch, J., Fudyma, J., Gil-Loaiza, J., Carpenter, E., Singer, E., Hildebrand, G., Shi, L., Hoyt, D., Krechmer, J., Claflin, M., Ayala-Ortiz, C., Freire-Zapata, V, Pfannerstill, E., Daber, L.E., Dippold, M., Kreuzwieser, J., Williams, J., Ladd, S.N., Werner, C., Tfaily, M., Meredith, L. “Drought induces microbial stress responses and emissions of volatile organic compounds in an artificial tropical rainforest.” In review at Nature Microbiology. Pre-print available: https://www.researchsquare.com/article/rs-1840246/v1
Hildebrand, G.A., Honeker, L.K., Fudyma, J., Daber, L.E., Amini Tabrizi, R., Ayala-Ortiz, C., Freier-Zapata, V., Chu, R.L., Toyoda, J., Flowers, S.E., Hoyt, D.W., Hamdan, R., Gil-Loaiza, J., Shi, L., Dippold, M., Ladd, S.N., Werner, C, Meredith, L.K., Tfaily, M.M. “Root metabolic responses to drought drive plant-microbe interactions in the rhizosphere.” In review at Soil Biology and Biochemistry.
Pugliese, G., Ingrisch, J., Meredith, L.K., Pfannerstill, E.Y., Kluepfel, T., Meeran, K., Byron, J., Purser, G., Gil-Loaiza, J., van Haren, J., Kreuzwieser, J., Ladd, S.N., Werner, C., Williams, J. “The effect of prolonged drought and recovery on soil VOC fluxes in an experimental rainforest.” In revision for Nature Communications. Pre-print available: https://www.researchsquare.com/article/rs-2025580/v1
Kühnhammer, K., van Haren, J., Kübert, A., Bailey, K., Dubbert, M., Hu, J., Ladd, N., Meredith, L.K., Werner, C., Beyer, M. “Deep roots mitigate drought impacts on tropical trees despite limited quantitative contribution to transpiration.” In review at Plant, Cell & Environment.
*Indicates student author
Nemiah Ladd, PhD 