Organic matter in the deep ocean

I am interested in the composition of organic matter in the deep ocean, and have conducted this research at hydrothermal vent sites on the East Pacific Rise and in the non-vent deep sea. I started my graduate career examining microbial diversity at deep sea hydrothermal vents.

Selected publications

Johnson, W. M., M. C. Kido Soule, K. Longnecker, M. P. Bhatia, S. J. Hallam, M. W. Lomas and E. B. Kujawinski (2023). Particulate and dissolved metabolite distributions along a latitudinal transect of the western Atlantic Ocean. Limnology and Oceanography 68(2): 377-393 (link to publication)

Longnecker, K., L. Oswald, M. C. K. Soule, G. A. Cutter, and E. B. Kujawinski. (2020). Organic sulfur: a spatially variable and understudied component of marine organic matter. Limnology and Oceanography Letters. 5: 305-312 (link to publication)

Longnecker, K. and E. B. Kujawinski (2020). Intracellular metabolites in marine microorganisms during an experiment evaluating microbial mortality. Metabolites 10: 105. (link to publication)

Johnson, W. M., K. Longnecker, M. C. Kido Soule, W. A. Arnold, M. P. Bhatia, S. J. Hallam, B. A. S. Van Mooy and E. B. Kujawinski (2020). "Metabolite composition of sinking particles differs from surface suspended particles across a latitudinal transect in the South Atlantic." Limnology and Oceanography 65: 111-127 (link to publication)

Longnecker, K., Sievert, S. M., Sylva, S. P., Seewald, J. S., & Kujawinski, E. B. (2018). Dissolved organic carbon compounds in deep-sea hydrothermal vent fluids from the East Pacific Rise at 9º50’N. Organic Geochemistry 125: 41-49 (link to publication)

Longnecker, K. and A.-L. Reysenbach (2001). Expansion of the geographic distribution of a novel lineage of e-Proteobacteria to a hydrothermal vent site on the Southern East Pacific Rise. FEMS Microbiology Ecology 35: 287-293. (link to publication)

Reysenbach, A.-L., K. Longnecker and J. Kirshtein (2000). Novel bacterial and archaeal lineages from an in situ growth chamber deployed at a Mid-Atlantic Ridge hydrothermal vent. Applied and Environmental Microbiology 66: 3798-3797. (link to publication)