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Investigating the effect of oil spills
on the environment and public health.
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Anthony Hayden Knap

Texas A&M University

Geochemical and Environmental Research Group

833 Graham Road
College Station , TX  77845  

tknap@tamu.edu

Project List:

Aggregation and Degradation of Dispersants and Oil by Microbial Exopolymers 2 (ADDOMEx-2): Towards a synthesis of process and pathways of marine oil snow formation

Year 8-10 Research Grants (RFP-VI)Role: Co-Principal Investigator, Task Lead

Deep-sea Risk Assessment and species sensitivity to WAF, CEWAF and Dispersant

Year 6-8 Investigator Grants (RFP-V)Role: Principal Investigator, Project Data Point of Contact, Outreach Team

Aggregation and Degradation of Dispersants and Oil by Microbial Exopolymers (ADDOMEx)

Year 5-7 Consortia Grants (RFP-IV)Role: Co-Principal Investigator, Task Lead

Publications & Presentations:

Journal Articles - 12

2020

Bacosa, H. P., Kamalanathan, M., Cullen, J., Shi, D., Xu, C., Schwehr, K. A., et al. (2020). Marine Snow Aggregates are Enriched in Polycyclic Aromatic Hydrocarbons (PAHs) in Oil Contaminated Waters: Insights from a Mesocosm Study. Jmse, 8(10), 781. doi
Bera, G., Doyle, S., Passow, U., Kamalanathan, M., Wade, T. L., Sylvan, J. B., et al. (2020). Biological response to dissolved versus dispersed oil. Marine Pollution Bulletin, 150, 110713. doi
Morales-McDevitt, M. E., Shi, D., Knap, A. H., Quigg, A., Sweet, S. T., Sericano, J. L., et al. (2020). Mesocosm experiments to better understand hydrocarbon half-lives for oil and oil dispersant mixtures. PLoS ONE, 15(1), e0228554. doi
Shi, D., Bera, G., Knap, A. H., Quigg, A., Al Atwah, I., Gold-Bouchot, G., et al. (2020). A mesocosm experiment to determine half-lives of individual hydrocarbons in simulated oil spill scenarios with and without the dispersant, Corexit. Marine Pollution Bulletin, 151, 110804. doi

2019

Bera, G., Gold-Bouchot, G., Passow, U., Wade, T. L., Shi, D., Morales-McDevitt, M., et al. (2019). Inter-laboratory calibration of estimated oil equivalent (EOE) concentrations of a water accommodated fraction (WAF) of oil and a chemically enhanced WAF (CEWAF). Heliyon, 5(1), e01174. doi
Xu, C., Lin, P., Zhang, S., Sun, L., Xing, W., Schwehr, K. A., et al. (2019). The interplay of extracellular polymeric substances and oil/Corexit to affect the petroleum incorporation into sinking marine oil snow in four mesocosms. Science of The Total Environment, 693, 133626. doi

2018

Bera, G., Parkerton, T., Redman, A., Turner, N. R., Renegar, A., Sericano, J. L., et al. (2018). Passive dosing yields dissolved aqueous exposures of crude oil comparable to the CROSERF (Chemical Response to Oil Spill: Ecological Effects Research Forum) water accommodated fraction method: Comparison of water accommodated fraction preparations. Environ Toxicol Chem, 37(11), 2810–2819. doi
Doyle, S. M., Whitaker, E. A., De Pascuale, V., Wade, T. L., Knap, A. H., Santschi, P. H., et al. (2018). Rapid Formation of Microbe-Oil Aggregates and Changes in Community Composition in Coastal Surface Water Following Exposure to Oil and the Dispersant Corexit. Front. Microbiol., 9. doi
Xu, C., Zhang, S., Beaver, M., Wozniak, A., Obeid, W., Lin, Y., et al. (2018). Decreased sedimentation efficiency of petro- and non-petro-carbon caused by a dispersant for Macondo surrogate oil in a mesocosm simulating a coastal microbial community. Marine Chemistry, 206, 34–43. doi

2017

Knap, A., Turner, N. R., Bera, G., Abigail Renegar, D., Frank, T., Sericano, J., et al. (2017). Short-Term Toxicity Of 1-Methylnaphthalene To Americamysis Bahia And Five Deep-Sea Crustaceans. Environ Toxicol Chem, 36(12), 3415–3423. doi
Wade, T. L., Morales-McDevitt, M., Bera, G., Shi, D., Sweet, S., Wang, B., et al. (2017). A method for the production of large volumes of WAF and CEWAF for dosing mesocosms to understand marine oil snow formation. Heliyon, 3(10), e00419. doi

2016

Quigg, A., Passow, U., Chin, W. - C., Xu, C., Doyle, S., Bretherton, L., et al. (2016). The role of microbial exopolymers in determining the fate of oil and chemical dispersants in the ocean: Interactions of microbial exopolymers in oil and chemical dispersants. Limnol. Oceanogr., 1(1), 3–26. doi

Conference Presentations - 34

2020

Wade, T. L., Bera, G., Liu, Y., Gold-Bouchot, G., Quigg, A., & Knap, A. H. (2020). Comparison of Estimated Oil Equivalent Half-Lives in ADDOMEx Controlled Mesocosm MOSSFA Studies. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2020. Tampa, FL : 02/03/20-02/06/20. openurl
Wade, T. L., Liu, Y., Doyle, S., Fulton, T., Sericano, J., Sylvan, J., et al. (2020). Tracing Microbial Transformation of Diluted Chemically Enhanced Water Accommodated Fraction of Crude Oil Through Targeted Metabolomics. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2020. Tampa, FL : 02/03/20-02/06/20: Poster. openurl

2019

Bera, G., Knap, A., Turner, N. R., Renegar, D. A., Whitemiller, E., Sericano, J. L., et al. (2019). Acute toxicity of oil and dispersant on deep-sea crustaceans. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2019. New Orleans, LA : 02/04/19-02/07/19. openurl
Wade, T. L., Morales-McDevitt, M. E., Shi, D., Bera, G., Knap, A. H., & Quigg, A. (2019). Half-Lives of Petroleum Hydrocarbons in Controlled Mesocosm Studies. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2019. New Orleans, LA : 02/04/19-02/07/19: Poster. openurl
Whitemiller, E., Renegar, D. A., Turner, N. R., Bera, G., Sericano, J. L., Sweet, S., et al. (2019). Acute toxicity of 1-methylnaphthalene and Macondo surrogate crude oil to the peppermint shrimp, Lysmata boggessi. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2019. New Orleans, LA : 02/04/19-02/07/19: Poster. openurl

2018

Bera, G., Parkerton, T., Redman, A., Turner, N., Renegar, D. A., Sericano, J. L., et al. (2018). Comparing aquatic toxicity of oil: PETROTOX model vs measured. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2018. New Orleans, LA : 02/05/18-02/08/18: Poster. openurl
Bera, G., Parkerton, T., Redman, A., Turner, N., Renegar, D. A., Sericano, J. L., et al. (2018). Single hydrocarbon toxicity to deep-sea shrimps and use of PETROTOX model in predicting aquatic toxicity of oil. In Oil Spill India 2018 – 5th International Conference & Exhibition on Oil Spill Prevention. New Delhi, India : 07/05/18-07/06/18. openurl
Kamalanathan, M., Gold Bouchot, G., Doyle, S., Bacosa, H., Bretherton, L., Altum, S., et al. (2018). Extracellular enzyme activities in a mesocosm experiment: insight into the microbial world during Deepwater Horizon oil spill. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2018. New Orleans, LA : 02/05/18-02/08/18: Poster. openurl
Knap, A., Windham, R., Sweet, S., Morales, M., Bera, G., Santschi, P. H., et al. (2018). A simple system for the oxygenation of mesocosms without stirring or bubbling. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2018. New Orleans, LA : 02/05/18-02/08/18. openurl
Lin, P., Xu, C., Sun, L., Schwehr, K. A., Xing, W., Yard, A., et al. (2018). Production of Exopolymeric Substances and the roles in oil transport in Water-Accommodated Fraction of Oil and Corexit/Oil Contaminated Mesocosms. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2018. New Orleans, LA : 02/05/18-02/08/18: Poster. openurl
Morales-McDevitt, M. E., Wade, T. L., Bera, G., Shi, D., Quigg, A., & Knap, A. (2018). Comparison between ambient and enhanced nutrient mesocosms in short and long term experiments. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2018. New Orleans, LA : 02/05/18-02/08/18: Poster. openurl
Renegar, D. A., Turner, N., Bera, G., Frank, T., Riegl, B., Knap, A., et al. (2018). Lysmata wurdmanni as a proxy for deep-water column micronekton in hydrocarbon toxicity studies. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2018. New Orleans, LA : 02/05/18-02/08/18. openurl
Turner, N., Renegar, D. A., Bera, G., Frank, T., Riegl, B., Knap, A., et al. (2018). Toxicity of oil to Americamysis bahia and deep-water column micronekton with comparisons to model predictions. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2018. New Orleans, LA : 02/05/18-02/08/18. openurl
Wade, T. L., & Knap, A. H. (2018). Estimated Effects on Fish Larvae of Water Column Polycyclic Aromatic Hydrocarbons (PAH) during and after the Deepwater Horizon (Macondo) Incident. In 255th ACS National Meeting & Exposition. New Orleans, LA : 03/18/18-03/22/18. openurl
Wade, T. L., & Knap, A. H. (2018). Estimated Effects on Fish Larvae of Water Column Polycyclic Aromatic Hydrocarbons (PAH) during and after the Deepwater Horizon (Macondo) Incident. In 255th National Meeting & Exposition of the American Chemical Society. New Orleans, LA : 03/18/18-03/22/18. openurl
Wade, T. L., Morales-McDevitt, M. E., Knap, A. H., Shi, D., Bera, G., & Quigg, A. (2018). Long Term Marine Oil Snow Experiment (LTMOSE). In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2018. New Orleans, LA : 02/05/18-02/08/18: Poster. openurl
Xu, C., Lin, P., Sun, L., Schwehr, K. A., Xing, W., Yard, A., et al. (2018). Effects of Water-Accommodated Fraction of Macondo Oil and Corexit on Oil Transport in Mesocosm Experiments. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2018. New Orleans, LA : 02/05/18-02/08/18: Poster. openurl

2017

Bera, G., Knap, A., Sweet, S., Gold, G., Wade, T., & Sericano, J. (2017). Comparing Water Accommodated Fraction (WAF) making procedures and their chemical composition. In International Oil Spill Conference 2017. Long Beach, CA : 05/15/17-05/18/17: Poster. openurl
Bera, G., Parkerton, T., Turner, N., Renegar, A., Sericano, J., & Knap, A. (2017). Comparing aquatic toxicity of oil: PETROTOX model vs measured. In 2nd Annual Texas A&M Postdoctoral Research Symposium. College Station, Texas : 09/20/17-09/20/17. openurl
Bera, G., Renegar, A., Turner, N., Frank, T., Sweet, S., Gold, G., et al. (2017). Temperature and salinity effects on partitioning co-efficient (KPDMS-water) of selected hydrophobic organic carbons (HOCs): their use for passive dosing. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2017. New Orleans, LA : 02/06/17-02/09/17: Poster. openurl
Bera, G., Turner, N., Renegar, A., Sericano, J., & Knap, A. (2017). Comparing aquatic toxicity of oil: PETROTOX model vs measured. In SETAC North America 38th Annual Meeting. Minneapolis, MN : 11/12/17-11/16/17: Poster. openurl
Gold-Bouchot, G., Nolen, R., Shi, D., Bera, G., Morales-McDevitt, M., Wade, T. L., et al. (2017). Chlorophyll a Levels in Dichloromethane Extracts from Mesocosm Exposed to WAF, DCEWAF and CEWAF. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2017. New Orleans, LA : 02/06/17-02/09/17: Poster. openurl
Morales-McDevitt, M. E., Knap, A., Wade, T. L., Gold-Bouchot, G., Shi, D., Bera, G., et al. (2017). Formation of Microbial Exopolymers in Mesocosm Experiments using Coastal and Open Ocean Waters Dosed with BP Surrogate Oil and Corexit 9500A. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2017. New Orleans, LA : 02/06/17-02/09/17. openurl
Shi, D., Wade, T. L., Gold-Bouchot, G., Sweet, S. T., Morales-McDevitt, M., Bera, G., et al. (2017). Polycyclic Aromatic Hydrocarbons (PAH) Distributions of WAF, DCEWAF and CEWAF Treatments in Mesocosm Experiments. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2017. New Orleans, LA : 02/06/17-02/09/17: Poster. openurl
Wade, T. L., Gold-Bouchot, G., Shi, D., Sweet, S. T., Morales-McDevitt, M., Bera, G., et al. (2017). Making Oil and Water Mix for ADDOMEx Mesocosms Marine Oil Snow Impact Experiments: a tale of WAF and CEWAF. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2017. New Orleans, LA : 02/06/17-02/09/17: Poster. openurl

2016

Bera, G., Knap, A., Sericano, J., Wade, T. L., Sweet, S. T., Gold-Bouchot, G., et al. (2016). Stability and chemical composition of water accommodated fraction (WAF) made through three different procedures and their implication in formation of extracellular polymeric substances (EPS) during oil spill. In American Chemical Society Southwest Regional Meeting 2016 (ACS SWRM-2016). Galveston, TX : 11/10/16-11/13/16. openurl
Bera, G., Knap, A., Sweet, S., Gold, G., Wade, T., Sericano, J., et al. (2016). Formation of Marine Snow in Presence of Dissolved Hydrocarbons from Oil Spill. In 2016 Texas A&M University Postdoctoral Research Symposium. College Station, TX : 09/21/16. openurl
Bera, G., Knap, A., Sweet, S., Gold, G., Wade, T., Sericano, J., et al. (2016). Stability and chemical composition of water accommodated fraction (WAF) made through three different procedures and their implication in formation of extracellular polymeric substances (EPS) during oil spill. In 2016 ACS Southwest Regional Meeting. Galveston, TX : 11/11/16-11/13/16. openurl
Bera, G., Knap, A. H., Wade, T. L., Gold-Bouchot, G., Sericano, J. L., & Quigg, A. (2016). Formation of Marine Snow in Presence of Dissolved Hydrocarbons from Oil Spills. In 2016 Texas A&M University Postdoctoral Research Symposium. College Station, TX : 09/21/16: Poster. openurl
Gold-Bouchot, G., Shi, D., Sweet, S., Morales-McDevitt, M., Ramirez-Miss, N., Passow, U., et al. (2016). Analysis of Hydrocarbons in WAF and CEWAF by Fluorescence. Results of an intercalibration exercise. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2016. Tampa, FL : 02/01/16-02/04/16: Poster. openurl
Morales-McDevitt, M., Wade, T. L., Knap, A. H., Gold-Bouchot, G., Shi, D., Sweet, S., et al. (2016). Water Accommodated Fraction (WAF) and Chemically Enhanced Water Accommodated Fraction (CEWAF) production using BP surrogate oil and Corexit 9500 for dosing of ADDOMEx Mesocosms. In Gulf of Mexico Oil Spill & Ecosystem Science Conference 2016. Tampa, FL : 02/01/16-02/04/16: Poster. openurl
Morales-McDevitt, M. E., Wade, T. L., Knap, A., Gold-Bouchot, G., Shi, D., Sweet, S., et al. (2016). Degradation of WAF, CEWAF, and DCEWAF in biologically enriched mesocosms. In 2016 Texas Bays and Estuaries Meeting. Port Arsansas, TX : 04/13/16-04/14/16. openurl
Wade, T. L., Knap, A., Morales-McDevitt, M., Gold-Bouchot, G., Shi, D., Sweet, S. T., et al. (2016). 2016 Identifying oil/marine snow associations Preparation of water accommodated fraction (WAF) and chemical enhanced water accommodated fraction (CWAF) for dosing of ADDOMEx mesocosms experiments. In American Chemical Society Southwest Regional Meeting 2016 (ACS SWRM-2016). Galveston, TX : 11/10/16-11/13/16. openurl
Xu, C., Zhang, S., Beaver, M., Lin, P., Sun, L., Schwehr, K. A., et al. (2016). Effects of Water-Accommodated Fraction (WAF) of Macondo Oil and Corexit on Formation of Marine Snow and Their Fate in Mesocosm Experiments. In American Chemical Society Southwest Regional Meeting 2016 (ACS SWRM-2016). Galveston, TX : 11/10/16-11/13/16. openurl
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