Research Biologist
Contact:
(530) 752-7870
john.madsen@ars.usda.gov
Area of Expertise:
Research Biologist
Education:
Ph.D., University of Wisconsin-Madison, 1986
Work Experience:
Research Biologist, USDA/ARS, Invasive Species and Pollinator Health Research Unit, Davis, CA, 2014 to present
Research Focus:
The long-term goal of my research is to develop long-term integrated management approaches to invasive aquatic plants based on an understanding of the life history of that target plant species that results in selective control of the target plant, with minimal environmental impact. This necessitates studies that include:
- Understanding the seasonal growth, phenology, and carbohydrate storage patterns of invasive aquatic plant species;
- Identifying growth stages of aquatic plants that are significant to the overwintering and propagation of the plant;
- Develop use patterns of aquatic herbicides that selectively manage the target plant with minimal impact on native species, and compatible with other management techniques;
- Evaluate the environmental impact of both the invasive plant species, and the management techniques used to manage them.
My current research projects include:
- Phenological and life history studies of water hyacinth, curlyleaf pondweed, Egeria, and flowering rush
- Chemical control of water hyacinth, Egeria, flowering rush, South American spongeplant, and Ludwigia
- Environmental drivers for growth of water hyacinth, South American spongeplant, Egeria, and flowering rush
- Partnering with agencies and research institutions on the development and implementation of invasive aquatic weed management programs
*Info about my research team:
Current lab members include: John Miskella and Christy Morgan
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- Toward understanding the impact of nuisance algae bloom on the reduction of rice seedling emergence and establishment
-(Peer Reviewed Journal)
Ohadi, S., Laguerre, G., Madsen, J.D., Al-Khatib, K. 2022. Toward understanding the impact of nuisance algae bloom on the reduction of rice seedling emergence and establishment. Weed Science. 70:95–102. https://doi.org/10.1017/wsc.2021.69. - Identification of Watermilfoil, Discovery of Hybrid Watermilfoil, and Their Implications for Aquatic Plant Management in the Clark Fork River, Western MT, USA
-(Peer Reviewed Journal)
Madsen, J.D., Wersal, R.M., Schmid, S.A., Thum, R.A., Welch, M., Phuntumart, V. 2021. Identification of Watermilfoil, Discovery of Hybrid Watermilfoil, and Their Implications for Aquatic Plant Management in the Clark Fork River, Western MT, USA. Biological Invasions. 36(1):111-124. https://doi.org/10.1080/02705060.2021.1908919. - Response of rice algal assemblage to fertilizer and chemical application: implications for the early algal bloom management
-(Peer Reviewed Journal)
Ohadi, S., Goddar, A., Madsen, J.D., Al-Khatib, K. 2021. Response of rice algal assemblage to fertilizer and chemical application: implications for the early algal bloom management. Crop Protection. 11(3):542. https://doi.org/10.3390/agronomy11030542. - Weak Non-linear Influences of Biotic and Abiotic Factors on Invasive Macrophyte Occurrence-(Peer Reviewed Journal)
Fleming, J.P., Wersal, R.M., Madsen, J.D., Dibble, E.D. 2021. Weak Non-linear Influences of Biotic and Abiotic Factors on Invasive Macrophyte Occurrence. Aquatic Invasions. 16(2):349-364. - Remote sensing and mapping of floating aquatic vegetation in the Sacramento-San Joaquin River Delta-(Peer Reviewed Journal)
Bubenheim, D., Genovese, V., Madsen, J.D., Hard, E. 2021. Remote sensing and mapping of floating aquatic vegetation in the Sacramento-San Joaquin River Delta. Journal of Aquatic Plant Management. 59s:46-54. - Mapping waterhyacinth drift and dispersal in the San Joaquin Delta using GPS trackers-(Peer Reviewed Journal)
Miskella, J.J., Madsen, J.D. 2021. Mapping waterhyacinth drift and dispersal in the San Joaquin Delta using GPS trackers. Journal of Aquatic Plant Management. 59s:41-45. - Operational aquatic weed management in the California Sacramento–San Joaquin River Delta-(Peer Reviewed Journal)
Caudill, J., Madsen, J.D., Pratt, W. 2021. Operational aquatic weed management in the California Sacramento–San Joaquin River Delta. Journal of Aquatic Plant Management. 59s:112-122. - An overview of the Delta Region Areawide Aquatic Weed Project for improved control of invasive aquatic weeds in the Sacramento-San Joaquin Delta-(Peer Reviewed Journal)
Moran, P.J., Madsen, J.D., Pratt, P.D., Bubenheim, D.L., Hard, E., Jabusch, T., Carruthers, R.I. 2021. An overview of the Delta Region Areawide Aquatic Weed Project for improved control of invasive aquatic weeds in the Sacramento-San Joaquin Delta. Journal of Aquatic Plant Management. 59s: 28-32. - Bioeconomic modeling of floating aquatic weeds in the Sacramento – San Joaquin River Delta-(Peer Reviewed Journal)
Jetter, K.M., Madsen, J.D., Bubenheim, D.I., Dong, J. 2021. Bioeconomic modeling of floating aquatic weeds in the Sacramento – San Joaquin River Delta. Journal of Aquatic Plant Management. 59:98-106. - Operational aquatic weed management in the California Sacramento–San Joaquin River Delta-(Peer Reviewed Journal)
- New herbicides and tank mixes for control of waterhyacinth in the Sacramento/San Joaquin Delta-(Peer Reviewed Journal)
Kyser, G.B., Madsen, J.D., Miskella, J., O Brien, J. 2021. New herbicides and tank mixes for control of waterhyacinth in the Sacramento/San Joaquin Delta. Journal of Aquatic Plant Management. 59s:78-81. - Brazilian egeria herbicide mesocosm and field trials for managing the Sacramento - San Joaquin River Delta-(Peer Reviewed Journal)
Madsen, J.D., Morgan, C., Miskella, J., Kyser, G., Gilbert, P., O Brien, J., Getsinger, K.D. 2021. Brazilian egeria herbicide mesocosm and field trials for managing the Sacramento - San Joaquin River Delta. Journal of Aquatic Plant Management. 59s:90–97. - Water temperature controls the growth of waterhyacinth and South American sponge plant-(Peer Reviewed Journal)
Madsen, J.D., Morgan, C.M. 2021. Water temperature controls the growth of waterhyacinth and South American sponge plant. Journal of Aquatic Plant Management. 59s:28-32. - Dissolved oxygen under water hyacinth following herbicide application-(Peer Reviewed Journal)
Miskella, J.J., Madsen, J.D., Llaban, A., Hard, E. 2021. Dissolved oxygen under water hyacinth following herbicide application. Journal of Aquatic Plant Management. 59s:82-89. - On the move: New insights on the ecology and management of native and alien macrophytes
-(Peer Reviewed Journal)
Hofstra, D., Schoelynck, J., Ferrell, J., Coetzee, J., De Winton, M., Bickel, T., Champion, P., Madsen, J.D., Bakker, E., Hilt, S., Matheson, F., Netherland, M., Gross, E. 2020. On the move: New insights on the ecology and management of native and alien macrophytes. Aquatic Botany. 162:103190. https://doi.org/10.1016/j.aquabot.2019.103190. - Torpedograss control via submersed applications of systemic and contact herbicides in mesocosms-(Peer Reviewed Journal)
Turnage, G., Wersal, R.M., Madsen, J.D. 2020. Torpedograss control via submersed applications of systemic and contact herbicides in mesocosms. Journal of Aquatic Plant Management. 58:67-71. - Torpedograss control via submersed applications of systemic and contact herbicides in mesocosms-(Abstract Only)
Turnage, G., Wersal, R., Madsen, J.D. 2019. Torpedograss control via submersed applications of systemic and contact herbicides in mesocosms. Meeting Abstract. 58:67-71. - Herbicides for management of Waterhyacinth in the Sacramento/San Joaquin River Delta, California-(Peer Reviewed Journal)
Madsen, J.D., Kyser, G. 2020. Herbicides for management of Waterhyacinth in the Sacramento/San Joaquin River Delta, California. Journal of Aquatic Plant Management. 58:98-104. - Selective control of flowering rush in mesocosms and field sites-(Peer Reviewed Journal)
Turnage, G., Madsen, J.D., Wersal, R.M., Byrd, J.D., Alcott, B., Guetter, T. 2020. Selective control of flowering rush in mesocosms and field sites. Journal of Aquatic Plant Management. 58:92-97. - Aquatic plant community restoration following long-term management of invasive Egeria densa with fluridone treatments
-(Peer Reviewed Journal)
Caudill, J., Jones, A., Anderson, L., Madsen, J.D., Gilbert, P., Shuler, S., Heilman, M. 2019. Aquatic plant community restoration following long-term management of invasive Egeria densa with fluridone treatments. Management of Biological Invasions. 10(3):473-485. https://doi.org/10.3391/mbi.2019.10.3.05. - Sequential applications of diquat to control flowering rush (Butomus umbellatus L.)-(Peer Reviewed Journal)
Turnage, G., Byrd, J.D., Wersal, R.M., Madsen, J.D. 2019. Sequential applications of diquat to control flowering rush (Butomus umbellatus L.). Journal of Aquatic Plant Management. 57:56-61. - Mechanical control of flowering rush (Butomus umbellatus)-(Peer Reviewed Journal)
Turnage, G., Madsen, J.D., Wersal, R.M., Byrd, J.D. 2019. Mechanical control of flowering rush (Butomus umbellatus). Invasive Plant Science and Management. 12:120-123. - Eurasian milfoil-()
Madsen, J.D. 2020. Eurasian milfoil. Book Chapter. 2.3:35-38. - Developing a lake management plan-()
Madsen, J.D. 2020. Developing a lake management plan. Book Chapter. 3.2:119-122. - The effect of temperature on waterhyacinth stembase regrowth-(Peer Reviewed Journal)
Miskella Jr, J.J., Madsen, J.D. 2018. The effect of temperature on waterhyacinth stembase regrowth. Journal of Aquatic Plant Management. 57:99-102. - Effects of initial propagule size and water depth on Butomus umbellatus L. growth and vegetative propagation
-(Peer Reviewed Journal)
Carter, C., Ervin, G., Madsen, J.D. 2018. Effects of initial propagule size and water depth on Butomus umbellatus L. growth and vegetative propagation. Aquatic Botany. 150:27-32. https://doi.org/10.1016/j.aquabot.2018.06.003. - Invasive aquatic vegetation management in the Sacramento-San Joaquin River Delta: status recommendations
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Ta, J., Anderson, L.W., Christman, M.A., Khanna, S., Kratville, D., Madsen, J.D., Moran, P.J., Viers, J.H. 2017. Invasive aquatic vegetation management in the Sacramento-San Joaquin River Delta: status recommendations. San Francisco Estuary and Watershed Science. 15(4) Retrieved from https://escholarship.org/uc/item/828355w6. doi: 10.15447/sfews.2017v15iss4art5. - Monitoring for national pollutant discharge elimination system permit requirements: Algaecides
-(Peer Reviewed Journal)
Calomeni, A.J., Geer, T., Lwinski, K., Rodgers, J.H., Madsen, J.D., Wersal, R.M. 2017. Monitoring for national pollutant discharge elimination system permit requirements: Algaecides. Journal of Integrated Pest Management. 8(1):1-9. https://doi.org/10.1093/jipm/pmx025. - Proper survey methods for research of aquatic plant ecology and management-(Peer Reviewed Journal)
Madsen, J.D., Wersal, R.M. 2018. Proper survey methods for research of aquatic plant ecology and management. Journal of Aquatic Plant Management. 56:90-96. - Designing and using phenological studies to define management strategies for aquatic plants-(Peer Reviewed Journal)
Wersal, R.M., Madsen, J.D. 2018. Designing and using phenological studies to define management strategies for aquatic plants. Journal of Aquatic Plant Management. 56:83-89. - Phenology of curlyleaf pondweed (Potamogeton crispus L.)in the southeastern US: a two year mesocosm study-(Peer Reviewed Journal)
Turnage, G., Wersal, R.M., Madsen, J.D. 2017. Phenology of curlyleaf pondweed (Potamogeton crispus L.)in the southeastern US: a two year mesocosm study. Journal of Aquatic Plant Management. 56:35-38. - Spatial and temporal variation of biological control agents associated with Eichhornia crassipes in the Sacramento-San Joaquin River Delta, California-(Peer Reviewed Journal)
Hopper, J.V., Pratt, P.D., McCue, K.F., Pitcairn, M.J., Moran, P.J., Madsen, J.D. 2017. Spatial and temporal variation of biological control agents associated with Eichhornia crassipes in the Sacramento-San Joaquin River Delta, California. Biological Control. 111:13-22. doi:10.1016/j.biocontrol.2017.05.005. - Curlyleaf pondweed control using copper-ethylenediamine alone and in combination with endothall-(Peer Reviewed Journal)
Turnage, G., Madsen, J.D. 2017. Curlyleaf pondweed control using copper-ethylenediamine alone and in combination with endothall. Journal of Aquatic Plant Management. 55:116-119. - Evaluating the efficacy of granular copper and triclopyr alone and in combination for control of flowering rush Butomus umbellatus-(Peer Reviewed Journal)
Tumage, G., Wersal, R.M., Madsen, J.D. 2017. Evaluating the efficacy of granular copper and triclopyr alone and in combination for control of flowering rush Butomus umbellatus. Journal of Aquatic Plant Management. 55:120-122. - Distribution and biomass allocation in relation to depth of flowering rush (Butomus umbellatus) in the Detroit Lakes, Minnesota-(Peer Reviewed Journal)
Madsen, J.D., Wersal, R.M., Marko, M.D. 2016. Distribution and biomass allocation in relation to depth of flowering rush (Butomus umbellatus) in the Detroit Lakes, Minnesota. Invasive Plant Science and Management. 9:161-170. - A review of aquatic plant monitoring and assessment methods-(Peer Reviewed Journal)
Madsen, J.D., Wersal, R.M. 2017. A review of aquatic plant monitoring and assessment methods. Journal of Aquatic Plant Management. 55(1):1-12. - Flowering rush control on drawn-down sediment: Mesocosm and field evaluations-(Peer Reviewed Journal)
Madsen, J.D., Woolf, T.E., Wersal, R.M. 2017. Flowering rush control on drawn-down sediment: Mesocosm and field evaluations. Journal of Aquatic Plant Management. 55:42-45. - Efficacy of combinations of diquat or triclopyr with fluridone for control of flowering rush-(Peer Reviewed Journal)
Madsen, J.D., Turnage, G., Getsinger, K.D. 2016. Efficacy of combinations of diquat or triclopyr with fluridone for control of flowering rush. Journal of Aquatic Plant Management. 54(2):68-71. - Management of flowering rush in the Detroit Lakes, Minnesota-(Peer Reviewed Journal)
Madsen, J.D., Sartain, B., Turnage, G., Marko, M.D. 2016. Management of flowering rush in the Detroit Lakes, Minnesota. Journal of Aquatic Plant Management. 54(2):61-67. - Evaluation of six herbicides for control of swamp smartweed [Persicaria hydropiperoides (Michx.) Small] under flooded and moist soil conditions-(Peer Reviewed Journal)
Madsen, J.D., Wersal, R.M. 2015. Evaluation of six herbicides for control of swamp smartweed [Persicaria hydropiperoides (Michx.) Small] under flooded and moist soil conditions. Journal of Aquatic Plant Management. 53:224-227. - Operational control of Eurasian watermilfoil and impacts to the native submersed aquatic macrophyte community in Lake Pend Oreille, Idaho-(Peer Reviewed Journal)
Madsen, J.D., Wersal, R.M., Woolf, T.E. 2015. Operational control of Eurasian watermilfoil and impacts to the native submersed aquatic macrophyte community in Lake Pend Oreille, Idaho. Invasive Plant Science and Management. 8:219-232. - Investigation of Darwin’s naturalization hypothesis in invaded macrophyte communities-(Peer Reviewed Journal)
Fleming, J.P., Dibble, E.D., Madsen, J.D., Wersal, R.M. 2015. Investigation of Darwin’s naturalization hypothesis in invaded macrophyte communities. Biological Invasions. 17(5):1519-1531.
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Integrated Weed Management and Restoration Strategies to Protect Water Resources and Aquatic and Wetland Ecosystems of the Far Western U.S. In-House Appropriated (D) Accession Number:439510 Aquatic Weeds Associated with Agricultural Water Supply Non-Assistance Cooperative Agreement (S) Accession Number:433288 Areawide Management of Invasive Weeds in the Sacramento/San Joaquin River Delta Non-Assistance Cooperative Agreement (S) Accession Number:433329