USGS Soil Carbon Research
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| Dr. Mark Waldrop | ||
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U.S. Geological Survey 345 Middlefield Rd., MS 962 Menlo Park, CA 94025 PHONE 650-329-5005 FAX 650-329-4920 mwaldrop@usgs.gov |
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| Education Professional Experience Memberships in Societies Research interests Publications | ||
| Curriculum Vitae Current Projects Collaborators Students Products/Posters | ||
| Education University of California-Berkeley, Soil Science, Ph.D, 2002 University of California-Berkeley, Soil Science, M.S. 1997 New Mexico State University, Soil Science, B.S. and Biology, B.S. 1995 |
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| Professional Experience Ecosystem Microbial Ecologist, U.S. Geological Survey, 2005-present Post-doctoral researcher, The University of Michigan, 2002-2005 Research Assistant, University of California-Berkeley, 1995-2002 Teaching Assistant, University of California-Berkeley, 1996 fall term, 1998 fall term |
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| Memberships in Professional Societies Ecological Society of America American Geophysical Union American Society of Microbiology Soil Science Society of America |
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| Research Interests Boreal forest ecosystems are being impacted by a variety of factors that affect ecosystem structure and function. Climate change is a major driving force behind changes in fire regimes, plant community distributions, potential terrestrialization, and permafrost melt. Although the significance of these different phenomenon for ecosystem biogeochemical cycling are known, or are at least being examined at a broad scale, the mechanisms that drive ecosystem response to them are not well understood. Understanding ecosystem biogeochemical response to global climate change requires and explicit consideration of the linkages between the aboveground and belowground (e.g. fungal and bacterial) biotic communities. This is because climate change affects the composition and function of microbial communities indirectly through alterations in disturbance regimes, plant community composition, hydrology, and other factors. Alterations in the composition and function of soil microbial communities, in turn, affect the biogeochemical cycling of elements, resulting in positive and negative feedbacks to aboveground biota and trace gas fluxes. My research is particularly focused on understanding the potential of microbial communities to access recalcitrant permafrost carbon and black carbon in relation to landscapes, succession, and global change. |
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| Collaborators Dave McGuire (USGS), Merritt Turetsky (MSU); Climate change and carbon Bonanza Creek LTER moisture gradient and wetland manipulation, Alaska Andrea Foster (USGS); Denaturing HPLC system for microbial diversity assessment Chris Green & Barbara Bekins (USGS); Functional genes and N cycling Kathleen Treseder, Steve Allison (UC Irvine), Michelle Mack (U. Florida); Nitrogen effects on carbon storage, Delta Junction, AK Don Zak & Chris Blackwood (U Michigan); Integrating molecular microbiology and biogeochemical fluxes Guntram Von Kiparski (LLNL); 14C of microbial biomass in a soil chronosequence George Aiken & Rob Striegl (USGS); Permafrost decomposition Marty Goldhaber & Dave Smith (USGS); Microbial diversity in Geochemical Landscapes Carol Kendall, Dan Doctor, Lee Pruett (USGS); 13C microbial biomass as indicators of substrate usage |
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| Publications & Presentations Please e-mail for electronic or paper reprints. First-author Publications: Waldrop, M.P., Zak, D.R., Blackwood, C., Curtis, C.D., and D. Tilman. 2006. Resource availability controls fungal diversity across a plant diversity gradient. Ecology Letters, 9: 1127-1135. Waldrop, M.P. and D.R. Zak. 2006. Response of oxidative enzyme activities to nitrogen deposition affects soil concentrations of dissolved organic carbon. Ecosystems, 9: 921-933. Waldrop, M.P. and M.K. Firestone. 2006. Response of microbial community composition and function to soil climate change. Microbial Ecology, 52 (4): 716-724. Waldrop, M.P. and M.K. Firestone. 2006. Seasonal dynamics of microbial community composition and function in oak canopy and open grassland soils. Microbial Ecology, 52 (3): 470-479. Waldrop, M.P., Zak, D.R., and R.L. Sinsabaugh. 2004. Microbial community response to N deposition in northern forest ecosystems. Soil Biology & Biochemistry. 36:1443-1451 Waldrop, M.P., Zak, D.R., Sinsabaugh, R.L., Gallo, M., and C. Lauber. 2004. N deposition modifies soil C storage through changes in microbial enzymatic activity. Ecological Applications 14 (4): 1172-1177. Waldrop, M.P. and M.K. Firestone. 2004. Microbial community utilization of recalcitrant and simple carbon compounds: impact of oak-woodland plant communities. Oecologia 138 (2): 275 - 284. Waldrop, M.P. and M.K. Firestone. 2004. Altered utilization patterns of young and old soil C by microorganisms caused by temperature shifts and N additions. Biogeochemistry 67: 235 - 248. Waldrop, M.P., McColl, J.G., and R.F. Powers. 2003. Effects of forest postharvest management practices on enzyme activities in decomposing litter. Soil Sci Soc Am J 2003 67: 1250-1256. Waldrop, M.P., T.C. Balser, and M.K. Firestone. 2000. Linking microbial community composition to function in a tropical soil. Soil Biology & Biochemistry 32: 1837-1846 First-author Conference Abstracts: Waldrop, M.P. Carbon cycling and carbon metabolism by soil fungi in a boreal forest: impacts of wildfire and permafrost on functional genes, isotope signatures, and ectomycorrhizae. American Geophysical Union, San Francisco, CA, 2006 Waldrop, M.P. Fungal and methanogen functional groups in boreal forests and wetlands in interior Alaska: Abundance, diversity, and process in the face of environmental change. World Congress of Soil Science, Philadelphia, PA, 2006 Waldrop, M.P. Determining microbial constraints on carbon flow in soil with 13C-PLFA and quantitative PCR. Biogeomon conference, Santa Cruz, CA, 2006 Waldrop, M.P. Integrating microbial community composition with biogeochemical C and N dynamics: Examples from lignin and polyphenol decomposition. American Geophysical Union, San Francisco, CA, 2005 Waldrop, M.P. Molecular approaches to biogeochemistry: Linking microbial community landscape patterns to soil carbon fluxes. USGS seminar, internet broadcast, can be downloaded here, 2005 Waldrop, M.P. Fungal community composition and function in boreal forest soils: Landscape controls and feedback to ecosystem processes. Ecological Society of America, Montreal, Canada, 2005. Waldrop, M.P., and D.R. Zak. Is microbial diversity dependent upon plant diversity? Results from a common garden experiment. International Society for Microbial Ecology (ISME) meeting, Cancun, Mexico, 2004. Waldrop, M.P., Zak, D.R., Sinsabaugh, R.L. Divergent responses of soil microbial activity and soil C storage to atmospheric N deposition suggests decomposer communities are not functionally redundant. Ecological Society of America Annual Meeting, Portland, OR, 2004 Waldrop, M.P., Zak, D.R., Sinsabaugh, R.L. Response and feedback of soil organisms to nitrogen deposition: implications for soil carbon sequestration. DOE Terrestrial Carbon Program review meeting, Boulder, CO, 2003 Waldrop, M.P., Zak, D.R., Sinsabaugh, R.L. Nitrogen deposition modifies soil carbon storage by alteration of microbial phenol oxidase activity: results of an isotope experiment. DOE Terrestrial Carbon Program review meeting, Boulder, CO, 2003 Waldrop, M.P., Zak, D.R., Sinsabaugh, R.L. N deposition affects C flow in soil by altering microbial enzyme activities. Soil Science Society of America Annual Meeting, 2002. Waldrop, M.P., and Firestone, M.K. Isotopic evidence for plant community alteration of C-cycling microbial functional groups in soil. Ecological Society of America Meeting, 2002. Waldrop, M.P., and Firestone, M.K. Environmental controls on microbial community composition and soil C pool utilization. International Society for Microbial Ecology, The Netherlands, 2001. Waldrop, M.P., and Firestone, M.K. Using stable isotopes to link microbial community composition and C cycling under altered environmental conditions. American Geophysical Union, San Francisco, 2000. Waldrop, M.P., and Firestone, M.K. Natural abundance stable isotopic ratios of microbial PLFA's: potential indicators of substrate usage? Stable Isotopes and the Environment meeting, UC Berkeley, 2000. Waldrop, M.P., and Firestone, M.K. Microbial community composition and C cycling in oak canopy and grassland soils: response to changes in vegetation and the environment. Soil Science Society of America Annual Meeting, Minneapolis, 2000. |
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U.S. Department of the Interior |
U.S. Geological Survey
URL: http://carbon.wr.usgs.gov/Waldrop.html
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Page Last Modified: Tuesday, 17-Apr-2007 17:16:03 EDT
