Positions

Publications

Academic Article

Year Title
2017 Stable isotopes and radiocarbon assess variable importance of plants and fungi in diets of arctic ground squirrelsArctic, Antarctic, and Alpine Research.  49:487-500. 2017
2017 Long-term carbon and nitrogen dynamics at SPRUCE revealed through stable isotopes in peat profilesBiogeosciences.  14:2481-2494. 2017
2017 Dietary protein content and tissue type control 13 C discrimination in mammals: an analytical approach.Rapid Communications in Mass Spectrometry.  31:639-648. 2017
2017 Increased C-3 productivity in Midwestern lawns since 1982 revealed by carbon isotopes in Amanita thiersiiJOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES.  122:280-288. 2017
2016 Isotopic evidence indicates saprotrophy in post-fire Morchella in Oregon and Alaska.Mycologia.  108:638-645. 2016
2016 The ectomycorrhizal status of a tropical black bolete, Phlebopus portentosus, assessed using mycorrhizal synthesis and isotopic analysis.Mycorrhiza.  26:333-343. 2016
2016 Isotopic Analysis of Sporocarp Protein and Structural Material Improves Resolution of Fungal Carbon Sources.Frontiers in Microbiology.  7:1994. 2016
2015 Mycorrhizal roots in a temperate forest take up organic nitrogen from C-13- and N-15-labeled organic matterPlant and Soil.  397:303-315. 2015
2015 Redefining fine roots improves understanding of below-ground contributions to terrestrial biosphere processes.New Phytologist.  207:505-518. 2015
2015 Exploring the phylogenetic affiliations and the trophic mode of Sedecula pulvinata (Sedeculaceae).Mycologia.  107:688-696. 2015
2015 Fish Productivity and Trophic Transfer in Created and Naturally Occurring Salt Marsh HabitatEstuaries Chesapeake Science Estuaries and Coasts.  38:1233-1250. 2015
2015 Convergence of soil nitrogen isotopes across global climate gradients.Scientific Reports.  5:8280. 2015
2014 Fungal carbon sources in a pine forest: evidence from a C-13-labeled global change experimentFungal Ecology.  10:91-100. 2014
2014 Fungi, ecosystems and global changeFungal Ecology.  10:1-2. 2014
2014 Fungal functioning in a pine forest: evidence from a ¹⁵N-labeled global change experiment.New Phytologist.  201:1431-1439. 2014
2013 Radiocarbon evidence for the mining of organic nitrogen from soil by mycorrhizal fungiBiogeochemistry.  114:381-389. 2013
2013 Microbes in nature are limited by carbon and energy: the starving-survival lifestyle in soil and consequences for estimating microbial rates.Frontiers in Microbiology.  4:324. 2013
2012 Nitrogen isotopes link mycorrhizal fungi and plants to nitrogen dynamics.New Phytologist.  196:367-382. 2012
2012 Controls of isotopic patterns in saprotrophic and ectomycorrhizal fungiSoil Biology and Biochemistry.  48:60-68. 2012
2012 Long- and short-term precipitation effects on soil CO2 efflux and total belowground carbon allocationAgricultural and Forest Meteorology.  156:54-64. 2012
2012 Amino acid cycling in plankton and soil microbes studied with radioisotopes: measured amino acids in soil do not reflect bioavailabilityBiogeochemistry.  107:339-360. 2012
2011 Conservation of ectomycorrhizal fungi: exploring the linkages between functional and taxonomic responses to anthropogenic N depositionFungal Ecology.  4:174-183. 2011
2011 Conservation of biotrophy in Hygrophoraceae inferred from combined stable isotope and phylogenetic analyses.Mycologia.  103:280-290. 2011
2010 Carbon sources for the Palaeozoic giant fungus Prototaxites inferred from modern analogues.Proceedings of the Royal Society B: Biological Sciences.  277:2149-2156. 2010
2010 Nitrogen isotopes in ectomycorrhizal sporocarps correspond to belowground exploration typesPlant and Soil.  327:71-83. 2010
2009 LINKING ECTOMYCORRHIZAL SPECIES COMPOSITION TO BELOWGROUND FUNCTION AND EXPLORATION TYPES.Journal of Nematology.  41:339-340. 2009
2009 Tracing metabolic pathways of lipid biosynthesis in ectomycorrhizal fungi from position-specific 13C-labelling in glucose.Environmental Microbiology.  11:3087-3095. 2009
2009 Controls of nitrogen isotope patterns in soil profilesBiogeochemistry.  95:355-371. 2009
2009 Nutrient allocations and metabolism in two collembolans with contrasting reproduction and growth strategiesFunctional Ecology.  23:745-755. 2009
2009 Global patterns of foliar nitrogen isotopes and their relationships with climate, mycorrhizal fungi, foliar nutrient concentrations, and nitrogen availability.New Phytologist.  183:980-992. 2009
2009 Mycorrhizal fungi supply nitrogen to host plants in Arctic tundra and boreal forests: 15N is the key signal.Canadian Journal of Microbiology.  55:84-94. 2009
2009 Nutrient Supply Rate and Mycorrhizal Colonization Control Patterns of Element Distribution in Ectomycorrhizal PineCommunications in Soil Sccience and Plant Analysis.  40:3503-3523. 2009
2008 Nitrogen form, availability, and mycorrhizal colonization affect biomass and nitrogen isotope patterns in Pinus sylvestrisPlant and Soil.  310:121-136. 2008
2008 Natural abundance of (15)N in nitrogen-limited forests and tundra can estimate nitrogen cycling through mycorrhizal fungi: A reviewEcosystems.  11:815-830. 2008
2007 C-13 and N-15 in microarthropods reveal little response of Douglas-fir ecosystems to climate changeGlobal Change Biology.  13:1386-1397. 2007
2007 The ectomycorrhizal status of Calostoma cinnabarinum determined using isotopic, molecular, and morphological methodsCanadian Journal of Botany Botany.  85:385-393. 2007
2007 Evidence that saprotrophic fungi mobilise carbon and mycorrhizal fungi mobilise nitrogen during litter decomposition.New Phytologist.  173:447-449. 2007
2006 15N in symbiotic fungi and plants estimates nitrogen and carbon flux rates in Arctic tundra.Ecology.  87:816-822. 2006
2006 Carbon allocation to ectomycorrhizal fungi correlates with belowground allocation in culture studies.Ecology.  87:563-569. 2006
2005 Foliar and fungal 15N:14N ratios reflect development of mycorrhizae and nitrogen supply during primary succession: testing analytical models.Oecologia.  146:258-268. 2005
2004 Nitrogen availability and mycorrhizal colonization influence water use efficiency and carbon isotope patterns in Pinus sylvestrisNew Phytologist.  164:515-525. 2004
2004 Carbon use, nitrogen use, and isotopic fractionation of ectomycorrhizal and saprotrophic fungi in natural abundance and 13C-labelled cultures.Mycological Research Fungal Biology.  108:725-736. 2004
2004 Intramolecular, compound-specific, and bulk carbon isotope patterns in C-3 and C-4 plants: a review and synthesis (vol 161, pg 371, 2004)New Phytologist.  162:240-240. 2004
2004 Intramolecular, compound-specific, and bulk carbon isotope patterns in C-3 and C-4 plants: a review and synthesisNew Phytologist.  161:371-385. 2004
2004 Isotopic estimates of new carbon inputs into litter and soils in a four-year climate change experiment with Douglas-firPlant and Soil.  259:331-343. 2004
2003 Patterns of natural N-15 in soils and plants from chemically and organically fertilized uplandsSoil Biology and Biochemistry.  35:1493-1500. 2003
2003 Carbohydrate use and assimilation by litter and soil fungi assessed by carbon isotopes and BIOLOG (R) assaysSoil Biology and Biochemistry.  35:303-311. 2003
2003 Nitrogen availability and colonization by mycorrhizal fungi correlate with nitrogen isotope patterns in plantsNew Phytologist.  157:115-126. 2003
2002 Contributions of current year photosynthate to fine roots estimated using a C-13-depleted CO2 sourcePlant and Soil.  247:233-242. 2002
2002 Effects of climate change on labile and structural carbon in Douglas-fir needles as estimated by delta C-13 and C-area measurementsGlobal Change Biology.  8:1072-1084. 2002
2002 Using radiocarbon to determine the mycorrhizal status of fungiNew Phytologist.  156:129-136. 2002
2002 Ectomycorrhizal fungal taxa differing in response to nitrogen deposition also differ in pure culture organic nitrogen use and natural abundance of nitrogen isotopesNew Phytologist.  154:219-231. 2002
2001 Foliar nitrogen concentrations and natural abundance of (15)N suggest nitrogen allocation patterns of Douglas-fir and mycorrhizal fungi during development in elevated carbon dioxide concentration and temperature.Tree Physiology.  21:1113-1122. 2001
2001 Mycorrhizal vs saprotrophic status of fungi: the isotopic evidenceNew Phytologist.  150:601-610. 2001
2000 Correlations between foliar δ15N and nitrogen concentrations may indicate plant-mycorrhizal interactions.Oecologia.  122:273-283. 2000
1999 Interpretation of nitrogen isotope signatures using the NIFTE model.Oecologia.  120:405-415. 1999
1999 Insights into nitrogen and carbon dynamics of ectomycorrhizal and saprotrophic fungi from isotopic evidence.Oecologia.  118:353-360. 1999
1998 Natural abundance of nitrogen-15 in a forest soilSoil Science Society of America Journal.  62:778-781. 1998

Conference Proceeding

Year Title
1998 Patterns in N dynamics and N isotopes during primary succession in Glacier Bay, AlaskaChemical Geology. 3-11. 1998

Principal Investigator On

  • Controls Regulating Biological Nitrogen Fixation in Longleaf Pine Ecosystems: The Role of Fire and Military Training  awarded by University of Georgia 2014 - 2018
  • Can Microbial Ecology and Mycorrhizal Functioning Inform Climate Change Models  awarded by Iowa State University 2012 - 2017
  • Quantification of Organic Nitrogen Use in FACE and Culture Experiments  awarded by National Science Foundation (NSF) 2012 - 2016
  • Modeling and Isotopes Link Mycorrhizal Fungi to Soil Carbon and Organic Nitrogen Use  awarded by National Science Foundation (NSF) 2011 - 2016
  • Dissertation Research: Developing Biochemical Tracers of Apatite Weathering by Ectomycorrhizal Fungi  awarded by National Science Foundation (NSF) 2012 - 2013
  • Bullard Fellowship Proposal at Harvard University: The Role of Ectomycorrhizal Fungi in Forest Ecosystems  awarded by Harvard University 2011 - 2012
  • Organic Nitrogen Cycling in Northern Hardwood-Conifer Forests  awarded by National Science Foundation (NSF) 2008 - 2012
  • Does Increased Precipitation Alter Belowground Allocation and Carbon Storage by Fine Roots and Mycorrhizal Fungi in Pine Savannas  awarded by Joseph W. Jones Ecological Research Ctr 2008 - 2011
  • Fungal Life History Strategies and Evolution: Insights from Isotopic Measurements and Phylogenetic Analysis  awarded by National Science Foundation (NSF) 2009 - 2011
  • Relationships between Carbon Allocation to Mycorrhizal Fungi and Organic Nitrogen use in Temperate Forests  awarded by National Science Foundation (NSF) 2006 - 2010
  • Most Arctic Plants Obtain Nitrogen by Symbiosis with Fungi: Development of a Radical Concept Cooperative Project  awarded by National Science Foundation (NSF) 2006 - 2010
  • MRI Isotope Ratio Mass Spectrometer  awarded by National Science Foundation (NSF) 2004 - 2007
  • Mycorrhizal Fungi Nitrogen Availability & Nitrogen Form  awarded by National Science Foundation (NSF) 2003 - 2007
  • New Insights Calcium Cycling Forests Isotopic Measurements  awarded by National Science Foundation (NSF) 2004 - 2006
  • Post-Fire Morels of Oregon and Alaska  awarded by US DA, Department of Agriculture 2004 - 2005
  • Teaching Activities

  • Isotope Geochemistry Taught course 2017
  • Education And Training

  • B.S. Chemistry, Yale University
  • M.S. Environmental Science, University of Virginia
  • Ph.D. Environmental Science, University of Virginia
  • Full Name

  • Erik Hobbie