KAREN MCLAUGHLIN – Biogeochemist


EDUCATION:

Ph.D., Geological & Environmental Sciences, Stanford University, 2005

B.S., Geosciences, Pennsylvania State University, 1999

AREAS OF EXPERTISE:

Dr. McLaughlin is a biogeochemist specializing in nutrient source tracking and the biogeochemical cycling of nutrients and organic matter in streams, estuaries, and coastal waters. Her dissertation research at Stanford University focused on the development and application of stable isotope tracers to understand the biogeochemical cycling of nutrients in watersheds, estuaries, and coastal waters. Her post-doctoral work at the University of California, Irvine focused on identification of fecal indicator bacteria sources and loading into Newport Bay, California. Her current research includes understanding factors and processes controlling nearshore ocean acidification and hypoxia (OAH) and standardizing monitoring practices to characterize spatial and temporal trends in OAH, understanding ecosystem response to anthropogenic nutrient loading, and determining “natural background” sources and cycling of nutrients via atmospheric deposition, groundwater inputs, assimilation, nitrogen fixation, and denitrification.

PROFESSIONAL EXPERIENCE:

Scientist, Southern California Coastal Water Research Project. Costa Mesa, CA. 2007-Present

Postdoctoral Researcher, University of California, Irvine. Irvine, CA. 2006-2007

Graduate Research Assistant, Stanford University Department of Geological & Environmental Sciences. Stanford, CA. 1999-2005

Undergraduate Research Assistant, Penn State University Department of Geosciences. State College, PA. 1997-1999

HONORS AND AWARDS:

Stanford University-US Geological Survey Graduate Fellow (2001)

Schlanger Ocean Drilling Program Fellow (2000)

Stanford University McGee Research Grant Recipient (2000)

Honorable Mention, National Science Foundation Graduate Research Fellowship (2000)

Distinction Graduate, Department of Geosciences, Penn State University (1999)

Phi Kappa Phi National Honor Society (1998)

Teas Scholarship for Geological Sciences, Penn State University (1998)

Drake Scholarship for Summer Field School, Penn State University (1998)

Trustees Scholarship for Geological Sciences, Penn State University (1997)

Golden Key National Honor Society (1996)

Phi Eta Sigma Freshman Honor Society (1995)

PROFESSIONAL SOCIETIES:

American Geophysical Union

American Society of Limnology and Oceanography

Coastal and Estuarine Research Federation

California Estuarine Research Society

PUBLICATIONS:

McLaughlin, K., N.P. Nezlin, M.D.A. Howard, C.D.A. Beck, R.M. Kudela, M.J. Mengel, G.L. Robertson. Rapid nitrification of wastewater ammonium near coastal ocean outfalls, Southern California, USA. Estuarine, Coastal and Shelf Science, in press.

Howard, M.D.A., R.M. Kudela, K. McLaughlin. New insights into impacts of anthropogenic nutrients on urban ecosystem processes on the Southern California coastal shelf: Introduction and synthesis. Estuarine, Coastal and Shelf Science, in press. 

Kudela, R.M., A.J. Lucas, K. Hayashi, M. Howard, K. McLaughlin. Death from below: Investigation of inhibitory factors in bloom development during a wastewater effluent diversion Estuarine, Coastal and Shelf Science, in press.

McLaughlin, K. S.B. Weisberg, A.G. Dickson, G.E. Hofmann, J.A. Newton, D. Aseltine-Neilson, A. Barton, S. Cudd, R.A. Feely, I. Jefferds, E.B. Jewett, T. King, C.J. Langdon, S. McAfee, D. Pleschner-Steele, and B. Steele. 2015. Core Principles of the California Current Acidification Network: Linking Chemistry, Physics, and Ecological Effects. Oceanography. 28(2):160–169.

A. Barton, G.G. Waldbusser, R.A. Feely, S.B. Weisberg, J.A. Newton, B. Hales, S. Cudd, B. Eudeline, C.J. Langdon, I.W. Jefferds, T. King, A. Suhrbier, and K. McLaughlin. 2015. Impacts of Coastal Acidification on the Pacific Northwest Shellfish Industry and Adaptation Strategies Implemented in Response. Oceanography 28(2): 146–159.

Rippy, M., R. Stein, B. Sanders, K. Davis, K. McLaughlin, J. Skinner, J. Kappeler, S. Grant. 2014. Small drains, big problems: the impact of dry weather runoff on shoreline water quality at enclosed beaches. Environmental Science & Technology. 48: 14168−14177

Howard, M.D.A., M. Sutula, D. Caron, Y. Chao, J.D. Farrara, H. Frenzel, B. Jones, G. Robertson, K. McLaughlin, A. Sengupta. 2014. Anthropogenic Nutrient Sources Rival Natural Sources on Small Scales in the Coastal Waters of the Southern California Bight. Limnology and Oceanography. 59: 285–297

McLaughlin, K., M. Sutula, L. Busse, S. Anderson, J. Crooks, R. Dagit, D. Gibson, K. Johnston, L. Stratton. 2013. A Regional Survey of the Extent and Magnitude of Eutrophication in Mediterranean Estuaries of Southern California, USA, Estuaries and Coasts, 37: 259-278.

McLaughlin, K., J. A. Sohm, G. A. Cutter, M. W. Lomas, and A. Paytan. 2013. Phosphorus cycling in the Sargasso Sea: Investigation using the oxygen isotopic composition of phosphate, enzyme-labeled fluorescence, and turnover times. . Global Biogeochemical Cycles , 27, 375-387. doi:10.1002/gbc.20037, 2013

McLaughlin, K., M.B. Young, A. Paytan, and C. Kendall. 2013. The oxygen isotopic composition of phosphate: A tracer for phosphate sources and cycling. . in: M. Ito and B. Newman (eds.), Technical Manual on the Application of Isotope Techniques for Nutrient Cycling and Management in Rivers. IAEA TECDOC-1695. Vienna, Austria

Paytan, A and K. McLaughlin. 2011. Tracing the Sources and Biogeochemical Cycling of Phosphorus in Aquatic Systems Using Isotopes of Oxygen in Phosphate. M. Baskaran (ed.), Handbook of Environmental Isotope Geochemistry, Advances in Isotope Geochemistry, DOI 10.1007/978-3-642-10637-8_21

Paytan A. and K. McLaughlin. Tracing the sources and biogeochemical cycling of phosphorus in aquatic systems using isotopes of oxygen in phosphate. in: M. Baskaran (ed.), Handbook of Environmental Isotope Geochemistry. Springer-Verlag. New York, NY In press.

Paytan A. and K. McLaughlin. Tracing the sources and biogeochemical cycling of phosphorus in aquatic systems using isotopes of oxygen in phosphate. in: M. Baskaran (ed.), Handbook of Environmental Isotope Geochemistry. Springer-Verlag. New York, NY In press.

Young, M.B., K. McLaughlin, C. Kendall, W. Stringfellow, M. Rollog, K. Elsbury, E. Donald, and A. Paytan. 2009. Characterizing the oxygen isotopic composition of phosphate sources to aquatic ecosystems. Environmental Science and Technology 43:5190-5196.

Elsbury, K.E., A. Paytan, N.E. Ostrom, C. Kendall, M.B. Young, K. McLaughlin, M.E. Rollog, and S. Watson. 2009. Using oxygen isotopes of phosphate to trace phosphorus sources and cycling in Lake Erie. Environmental Science and Technology 43:3108-3114.

Jeong, Y., B.F. Sanders, K. McLaughlin, and S.B. Grant. 2008. Treatment of dry weather urban runoff in tidal saltwater marshes: A longitudinal study of the Talbert Marsh in southern California. Environmental Science and Technology 42:3609-3614.

McLaughlin, K., J.H. Ahn, R.M. Litton, and S.B. Grant. 2007. Use of salinity mixing models to estimate the contribution of creek water fecal indicator bacteria to an estuarine environment: Newport Bay, California. Water Research 41:3595-3604.

Paytan, A. and K. McLaughlin. 2007. Phosphorus in our waters. Oceanography 20:200-206.

Paytan, A. and K. McLaughlin. 2007. The Oceanic Phosphorus Cycle. Chemical Reviews: Chemical Oceanography 107:563-576.

McLaughlin, K., C. Kendall, S.R. Silva, M.B.Young, and A. Paytan. 2006. Phosphate oxygen isotopes as a tracer for sources and cycling of phosphate in San Francisco Bay. Journal of Geophysical Research: Biogeosciences 111.

McLaughlin, K., B.J. Cade-Menun, and A. Paytan. 2006. The oxygen isotopic composition of phosphate in Elkhorn Slough, California: A tracer for phosphate sources. Estuarine, Coastal and Shelf Science 70:499-506.

McLaughlin, K., F.P. Chavez, J.T. Pennington, and A. Paytan. 2006. A time series investigation of the oxygen isotopic composition of dissolved inorganic phosphate in Monterey Bay: Evidence for variations in phosphate cycling and utilization. Limnology and Oceanography 51:2370-2379.

McLaughlin, K., C. Kendall, S.R. Silva, and A. Paytan. 2006. Oxygen isotopes of phosphatic compounds: Application for marine particulate matter, sediments, and soils. Marine Chemistry 98:148-155.

McLaughlin, K., S. Silva, C. Kendall, H. Stuart-Williams, and A. Paytan. 2004. A precise method for the analysis of d18O of dissolved inorganic phosphate in seawater. Limnology and Oceanography Methods 2:202-212.

Paytan, A., B. Cade-Menun, and K. McLaughlin. 2003. Selective phosphorus regeneration of sinking marine particles: Evidence from 31P-NMR. Marine Chemistry 82:55-70.

TECHNICAL REPORTS:

Martz, T., K. McLaughlin, S.B. Weisberg. 2015. Best Practices for autonomous measurement of Seawater pH with the Honeywell Durafet pH sensor. California Current Acidification Network (C-CAN). Technical Report 861.

McLaughlin, K., S.B. Weisberg, S. Alin, A. Barton, T. Capson, A. Dickson, B. Eudeline, D. Gledhill, B. Hales, T. Martz, J. Salisbury. 2014. Guidance Manual for Establishing a Land-Based Station for Measurement of Ocean Acidification Parameters. California Current Acidification Network (C-CAN).

McLaughlin, K., M. Sutula, P. Padgett. 2014. Estimating Wet and Dry Deposition of Nitrogen to Southern California Streams: Final Report of IA DW-12-92326401-0. Technical Report 837. Southern California Coastal Water Research Project Authority. Costa Mesa, CA.

McLaughlin, K., S. Weisberg, A. Dickson, G. Hofmann, J. Newton. 2013. Core Principles for Development of a West Coast Network for Monitoring Marine Acidification and Its Linkage to Biological Effects in the Nearshore Environment. California Current Acidification Network (C-CAN).

McLaughlin, K., M. Sutula, L. Busse, S. Anderson, J. Crooks, R. Dagit, D. Gibson, K. Johnston, N. Nezlin, L. Stratton. 2012. Southern California Bight 2008 Regional Monitoring Program VIII: Estuarine Eutrophication Assessment. Southern California Coastal Water Research Project. Costa Mesa, CA.

Howard, M.D.A., G. Robertson, M. Sutula, B. Jones, N. Nezlin , Y. Chao, H. Frenzel, M. Mengel, D.A. Caron, B. Seegers, A. Sengupta, E. Seubert, D. Diehl and S.B. Weisberg. 2012. Southern California Bight 2008 Regional Monitoring Program: Volume VII. Water Quality. Technical Report 710. Southern California Coastal Water Research Project. Costa Mesa, CA.

McLaughlin, K., M. Sutula, J. Cable, and P. Fong. 2011. Eutrophication and Nutrient Cycling in Buena Vista Lagoon, Carlsbad, California. Technical Report 638. Southern California Coastal Water Research Project. Costa Mesa, CA.

McLaughlin, K., M. Sutula, J. Cable, and P. Fong. 2011. Eutrophication and Nutrient Cycling in San Elijo Lagoon, Encinitas, California. Technical Report 636. Southern California Coastal Water Research Project. Costa Mesa, CA.

McLaughlin, K., M. Sutula, J. Cable, and P. Fong. 2011. Eutrophication and Nutrient Cycling in Santa Margarita Estuary, Camp Pendleton, California. . Technical Report 635. Southern California Coastal Water Research Project. Costa Mesa, CA.

McLaughlin, K., M. Sutula, J. Cable, and P. Fong. 2011. Eutrophication and nutrient cycling in Loma Alta Slough: A summary of baseline data for monitoring order R9‐2006‐0076. Technical Report 630. Southern California Coastal Water Research Project. Costa Mesa, CA.

McLaughlin, K., M. Sutula, J. Cable, and P. Fong. 2010. Eutrophication and nutrient cycling in Famosa Slough: A summary of baseline data for monitoring order R9‐2006‐0076. Technical Report 629. Southern California Coastal Water Research Project. Costa Mesa, CA

Grant, S.B., S.C. Jiang, B.F. Sanders, K. McLaughlin, J.H. Ahn, R. Litton, L. Ho, and D. Moore. 2009. Newport Bay fecal indicator bacteria source identification project: A final report submitted to the County of Orange and the California Santa Ana Regional Water Quality Control Board. University of California, Irvine, CA.

Fetscher, A.E., and K. McLaughlin. 2008. Incorporating bioassessment using freshwater algae into California's Surface Water Ambient Monitoring Program (SWAMP). Technical Report 563. Southern California Coastal Water Research Project. Costa Mesa, CA.

McLaughlin, K. and M. Sutula. 2008. Developing nutrient numeric endpoints and TMDL tools for California estuaries: An implementation plan. Technical Report 540. Southern California Coastal Water Research Project. Costa Mesa, CA.

SELECTED PRESENTATIONS AND CONFERENCE PROCEEDINGS:

Virmani, J., M. Huelsenbeck, K. McLaughlin. 2015. pH Sensors from the Wendy Schmidt Ocean Health XPRIZE. California Current Acidification Network, Ocean Acidification Round Table Webinar.

McLaughlin, K., N.P. Nezlin, S.B. Weisberg. 2015. An Evaluation of Potentiometric pH Sensors in Coastal Monitoring Applications. Coastal and Estuarine Research Federation Biennial Meeting. Portland, OR.

McLaughlin, K., M.D.A. Howard, N.P. Nezlin, C.D.A. Beck, G. Roberston. 2014. Unraveling the Impacts of Wastewater Effluent on Coastal Nitrogen Cycling: Lessons from the Southern California Bight. California Estuarine Research Society Fall Meeting. Bodega Bay, CA.

McLaughlin K, M.D.A. Howard, N.P. Nezlin, C.D.A. Beck, G. Robertson. 2014. Untangling the Impacts of Wastewater Effluent on Coastal Nitrogen Cycling: Lessons from the Southern California Bight. Ocean Sciences Meeting. Honolulu, HI.

McLaughlin, K., 2014. Ocean Acidification: Causes and Implications of Changing Ocean Chemistry. Back Bay Science Center Lecture Series, Newport Beach, CA.

McLaughlin, K., 2014. Ocean Acidification: Causes and Implications of Changing Ocean Chemistry. Coastal Commission, Newport Beach, CA.

McLaughlin, K., M. Sutula, L. Busse, S. Anderson, J. Crooks, R. Dagit, D. Gibson, K. Johnston, N. Nezlin, A. Sengupta, L. Stratton. 2013. Nutrients or Biological Response: How Should We Assess Eutrophication in Estuaries? Thoughts based on work in southern California. Coastal and Estuarine Research Federation Biennial Meeting, San Diego, CA.

McLaughlin, K., M. Sutula, L. Busse, S. Anderson, S. Birosik, R. Dagit, J. Crooks, D. Gibson, K. Johnston, L. Stratton, 2013. Riverine Nutrient Inputs and Extent of Estuarine Eutrophication in the Southern California Bight: Results from the Bight 08 Regional Survey. California Water Quality Monitoring Collaboration Network Webinar.

McLaughlin, K. Untangling the Effects of Anthropogenic Versus Natural Nutrient Sources in the Southern California Bight. 2013. University of California, Irvine. Civil and Environmental Engineering Department Seminar.

McLaughlin, K., M. Sutula, L. Busse, S. Anderson, S. Bergquist, J. Crooks, R.Dagit, D. Gibson, K. Johnson, and L. Stratton. 2012. Magnitude and Extent of Eutrophication in Southern California Bight Estuaries: Results of the Bight '08 Regional Survey. Presentation at Headwaters to Ocean Annual Conference. San Diego, CA.

McLaughlin, K., M. Sutula, L. Busse, S. Anderson, S. Bergquist, J. Crooks, R.Dagit, D. Gibson, K. Johnson, and L. Stratton. 2012. Magnitude and Extent of Eutrophication in Southern California Bight Estuaries: Results of the Bight '08 Regional Survey. Presentation at California Estuarine Research Society Conference. Long Beach, CA.

McLaughlin, K., M. Sutula, L. Busse, S. Anderson, S. Bergquist, J. Crooks, R.Dagit, D. Gibson, K. Johnson, and L. Stratton. 2012. Riverine Nutrient Inputs and Extent of Estuarine Eutrophication in the Southern California Bight (SCB). Presentation at the California Stormwater Quality Association (CASQA) Annual Conference. Long Beach, CA.

McLaughlin, K., M. Sutula, L. Busse, S. Anderson, S. Bergquist, J. Crooks, R.Dagit, D. Gibson, K. Johnson, and L. Stratton. 2012. Extent of Hypoxia in the Southern California Bight Estuaries and Relationship to Environmental Drivers. Poster presentation at SETAC North America 33rd Annual Meeting in Long Beach, CA.

McLaughlin, K., M. Sutula, J. Cable, P. Fong, and L. Green. 2010. Factors controlling eutrophication in an urban estuary: Famosa Slough, California. Presentation at EOS Transactions, the American Geophysical Union Fall Conference. San Francisco, CA.

McLaughlin, K., J.H. Ahn, R.M. Litton, and S.B. Grant. 2006. Narrowing the search for sources of fecal indicator bacteria with a simple salinity mixing model. Presentation at EOS Transactions, the American Geophysical Union Fall 2006 Conference. San Francisco, CA.

McLaughlin, K. and A. Paytan. 2006. Insights into Phosphate Sources and Cycling from Oxygen Isotopes of Phosphate; Three Studies: San Francisco Bay, Monterey Bay, Elkhorn Slough. Invited presentation at the BIOGEOMON Symposium. Santa Cruz, CA.

McLaughlin, K. and A. Paytan. 2005. Insights into phosphate turnover in the Sargasso Sea from the oxygen isotopic composition of dissolved inorganic phosphate. Presentation at EOS Transactions, the American Geophysical Union Fall 2005 Conference. San Francisco, CA.

McLaughlin, K., A. Paytan, C. Kendall, and S.R. Silva. 2005. Phosphate oxygen isotope ratios as a tracer for sources and cycling of phosphate in North San Francisco Bay. Presentation at the State of the Estuary Conference. Sacramento, CA.

McLaughlin, K., A. Paytan, C. Kendall, and S.R. Silva. 2004. Phosphate Oxygen Isotopes as a Tracer for Sources and Cycling of Phosphate in San Francisco Bay. Presentation at EOS Transactions, the American Geophysical Union Fall 2004 Conference. San Francisco, CA.

McLaughlin, K., A. Paytan, C. Kendall, S.R. Silva, F.P. Chavez, and J.T. Pennington. 2003. A Time Series Investigation of the Oxygen Isotopic Composition of Dissolved Inorganic Phosphate in Monterey Bay Seawater. Presentation at EOS Transactions, the American Geophysical Union Fall 2003 Conference. San Francisco, CA.