World's Best Scientists 2026 revealed!

D-Index & Metrics

Environmental Sciences

D-Index
37
Citations
5608
World Ranking
8881
National Ranking
3185

Donald E. Todd publication distribution in Environmental Sciences in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Environmental Sciences in 2026. The highlighted bar marks where Donald E. Todd sits on this spectrum.

41–50 publications: 21 scientists 51–60 publications: 62 scientists 61–70 publications: 133 scientists 71–80 publications: 257 scientists 81–90 publications: 361 scientists 91–100 publications: 440 scientists 101–110 publications: 492 scientists 111–120 publications: 541 scientists 121–130 publications: 617 scientists 131–140 publications: 544 scientists 141–150 publications: 541 scientists 151–160 publications: 539 scientists 161–170 publications: 444 scientists 171–180 publications: 444 scientists 181–190 publications: 400 scientists 191–200 publications: 377 scientists 201–210 publications: 318 scientists 211–220 publications: 283 scientists 221–230 publications: 263 scientists 231–240 publications: 220 scientists 241–250 publications: 217 scientists 251–260 publications: 180 scientists 261–270 publications: 181 scientists 271–280 publications: 155 scientists 281–290 publications: 130 scientists 291–300 publications: 127 scientists 301–310 publications: 130 scientists 311–320 publications: 85 scientists 321–330 publications: 106 scientists 331–340 publications: 80 scientists 341–350 publications: 83 scientists 351–360 publications: 75 scientists 361–370 publications: 69 scientists 371–380 publications: 52 scientists 381–390 publications: 54 scientists 391–400 publications: 56 scientists 401–410 publications: 44 scientists 411–420 publications: 40 scientists 421–430 publications: 36 scientists 431–440 publications: 25 scientists 441–450 publications: 25 scientists 451–460 publications: 32 scientists 461–470 publications: 29 scientists 471–480 publications: 21 scientists 481–490 publications: 26 scientists 491–500 publications: 25 scientists 501–510 publications: 17 scientists 511–520 publications: 18 scientists 521–530 publications: 15 scientists 531–540 publications: 22 scientists 541–550 publications: 12 scientists 551–560 publications: 15 scientists 561–570 publications: 11 scientists 571–580 publications: 19 scientists 581–590 publications: 9 scientists 591–600 publications: 9 scientists 601–610 publications: 7 scientists 611–620 publications: 11 scientists 621–630 publications: 5 scientists 631–640 publications: 5 scientists 641–650 publications: 6 scientists 651–660 publications: 3 scientists 661–670 publications: 3 scientists 671–680 publications: 4 scientists 681–686 publications: 3 scientists 687+ publications: 100 scientists
41 publications 687+

This scientist: 71 publications — 2nd percentile

2% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 687 publications or more.

Donald E. Todd D-index placement in Environmental Sciences in 2026

The chart shows the D-index (discipline H-index) distribution of Environmental Sciences scientists ranked by Research.com in 2026. The highlighted bar marks where Donald E. Todd sits on this spectrum.

30 D-Index: 12 scientists 31 D-Index: 26 scientists 32 D-Index: 51 scientists 33 D-Index: 88 scientists 34 D-Index: 123 scientists 35 D-Index: 163 scientists 36 D-Index: 206 scientists 37 D-Index: 267 scientists 38 D-Index: 265 scientists 39 D-Index: 275 scientists 40 D-Index: 321 scientists 41 D-Index: 343 scientists 42 D-Index: 305 scientists 43 D-Index: 336 scientists 44 D-Index: 330 scientists 45 D-Index: 348 scientists 46 D-Index: 291 scientists 47 D-Index: 275 scientists 48 D-Index: 272 scientists 49 D-Index: 273 scientists 50 D-Index: 263 scientists 51 D-Index: 232 scientists 52 D-Index: 266 scientists 53 D-Index: 217 scientists 54 D-Index: 199 scientists 55 D-Index: 177 scientists 56 D-Index: 202 scientists 57 D-Index: 204 scientists 58 D-Index: 166 scientists 59 D-Index: 177 scientists 60 D-Index: 166 scientists 61 D-Index: 152 scientists 62 D-Index: 143 scientists 63 D-Index: 150 scientists 64 D-Index: 124 scientists 65 D-Index: 119 scientists 66 D-Index: 120 scientists 67 D-Index: 118 scientists 68 D-Index: 82 scientists 69 D-Index: 98 scientists 70 D-Index: 94 scientists 71 D-Index: 105 scientists 72 D-Index: 74 scientists 73 D-Index: 84 scientists 74 D-Index: 70 scientists 75 D-Index: 67 scientists 76 D-Index: 78 scientists 77 D-Index: 60 scientists 78 D-Index: 59 scientists 79 D-Index: 52 scientists 80 D-Index: 47 scientists 81 D-Index: 38 scientists 82 D-Index: 48 scientists 83 D-Index: 42 scientists 84 D-Index: 42 scientists 85 D-Index: 43 scientists 86 D-Index: 29 scientists 87 D-Index: 37 scientists 88 D-Index: 29 scientists 89 D-Index: 30 scientists 90 D-Index: 34 scientists 91 D-Index: 20 scientists 92 D-Index: 22 scientists 93 D-Index: 17 scientists 94 D-Index: 19 scientists 95 D-Index: 24 scientists 96 D-Index: 21 scientists 97 D-Index: 20 scientists 98 D-Index: 24 scientists 99 D-Index: 17 scientists 100 D-Index: 17 scientists 101 D-Index: 21 scientists 102 D-Index: 25 scientists 103 D-Index: 18 scientists 104 D-Index: 26 scientists 105 D-Index: 19 scientists 106 D-Index: 15 scientists 107 D-Index: 10 scientists 108 D-Index: 13 scientists 109 D-Index: 15 scientists 110 D-Index: 12 scientists 111 D-Index: 8 scientists 112 D-Index: 7 scientists 113 D-Index: 9 scientists 114 D-Index: 6 scientists 115 D-Index: 12 scientists 116 D-Index: 7 scientists 117 D-Index: 8 scientists 118 D-Index: 3 scientists 119 D-Index: 5 scientists 120 D-Index: 7 scientists 121 D-Index: 2 scientists 122 D-Index: 4 scientists 123 D-Index: 8 scientists 124 D-Index: 7 scientists 125+ D-Index: 99 scientists
30 D-Index 125+

This scientist: 37 D-Index — 10th percentile

10% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 125 D-Index or more.

Overview

Donald E. Todd is a researcher affiliated with Oak Ridge National Laboratory in the United States. Their work spans multiple fields within environmental and earth sciences, focusing significantly on isotope applications and geochemical processes.

Their primary fields of study include Environmental Science and Earth and Planetary Sciences, with specific subfields in Ecology, Geochemistry and Petrology, and Global and Planetary Change. These areas reflect a multidisciplinary approach to understanding environmental systems and isotope behavior in natural contexts.

Donald E. Todd's research extensively covers topics such as Isotope Analysis in Ecology, Groundwater and Isotope Geochemistry, and Radioactive Contamination and Transfer. These topics indicate a focus on tracing chemical and isotopic signatures within ecosystems and environmental compartments, alongside considerations of contamination pathways.

Their recent publication is titled "Enriched Background Isotope Study (EBIS): Analysis of 14C-Enriched Carbon Cycle in Soils and Litter at Forested Oak Ridge and AmeriFlux Sites, 2001-2011", published in 2024 by OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information). This paper reflects engagement with long-term ecological studies involving carbon cycle isotopes, highlighting an interest in environmental carbon dynamics over time.

Frequent coauthors collaborating with Donald E. Todd include:

  • Paul J. Hanson
  • Jana R. Phillips
  • Charles T. Garten
  • Christopher W. Swanston
  • Karis J. McFarlane

Publications are predominantly found in venues such as OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information), indicating a connection to research supported or shared by government scientific repositories.

Best Publications

  • Seasonal and topographic patterns of forest floor CO2 efflux from an upland oak forest

    P. J. Hanson;S. D. Wullschleger;S. A. Bohlman;D. E. Todd

  • Mercury Distribution Across 14 U.S. Forests. Part I: Spatial Patterns of Concentrations in Biomass, Litter, and Soils

    D. Obrist;D. W. Johnson;S. E. Lindberg;Y. Luo

  • Transpiration from a multi-species deciduous forest as estimated by xylem sap flow techniques

    Stan D Wullschleger;P.J Hanson;D.E Todd

  • Relationships Among Iron, Aluminum, Carbon, and Sulfate in a Variety of Forest Soils1

    Dale W. Johnson;D. E. Todd

  • Allometric determination of tree growth in a CO2‐enriched sweetgum stand

    Richard J. Norby;Donald E. Todd;Jason Fults;Dale W. Johnson

  • Harvesting Effects on Long‐Term Changes in Nutrient Pools of Mixed Oak Forest

    D. W. Johnson;D. E. Todd

  • Nutrient Cycling in Red Spruce Forests of the Great Smoky Mountains

    D. W. Johnson;Helga Van Miegroet;S. E. Lindberg;R. B. Harrison

  • A six-year study of sapling and large-tree growth and mortality responses to natural and induced variability in precipitation and throughfall

    Paul J. Hanson;Donald E. Todd;Jeffrey S. Amthor

  • Sulfate Adsorption and Desorption Reversibility in a Variety of Forest Soils

    Robert B. Harrison;Dale W. Johnson;Don E. Todd

  • Changes in soil quality and below-ground carbon storage with conversion of traditional agricultural crop lands to bioenergy crop production

    V.R Tolbert;D.E Todd;L.K Mann;C.M Jawdy

  • Drought resistance of two hybrid Populus clones grown in a large-scale plantation

    Timothy J. Tschaplinski;Gerald A. Tuskan;G. Michael Gebre;Donald E. Todd

  • Effects of elevated CO2 on nutrient cycling in a sweetgum plantation

    D. W. Johnson;W. Cheng;J. D. Joslin;R. J. Norby

  • Effects of Sawlog vs. Whole-Tree Harvesting on the Nitrogen, Phosphorus, Potassium, and Calcium Budgets of an Upland Mixed Oak Forest

    D. W. Johnson;D. C. West;D. E. Todd;L. K. Mann

  • Hydrogeochemical processes controlling subsurface transport from an upper subcatchment of Walker Branch watershed during storm events. 1. Hydrologic transport processes

    G.V. Wilson;P.M. Jardine;R.J. Luxmoore;L.W. Zelazny

  • Nutrient cycling in forests of Walker Branch Watershed, Tennessee : roles of uptake and leaching in causing soil changes

    D. W. Johnson;D. E. Todd

  • Changes in nutrient distribution in forests and soils of Walker Branch watershed, Tennessee, over an eleven-year period

    Dale W. Johnson;Gray S. Henderson;Donald E. Todd

  • Measuring stem water content in four deciduous hardwoods with a time-domain reflectometer

    Stan D. Wullschleger;Paul J. Hanson;Donald E. Todd

  • Atmospheric Sulfur Deposition, Neutralization, and Ion Leaching in Two Deciduous Forest Ecosystems

    D. D. Richter;D. W. Johnson;D. E. Todd

  • Low dissolved organic carbon input from fresh litter to deep mineral soils

    M. Fröberg;P. M. Jardine;P. J. Hanson;C. W. Swanston

  • Cycling of organic and inorganic sulphur in a chestnut oak forest.

    D. W. Johnson;G. S. Henderson;D. D. Huff;S. E. Lindberg

  • Nutrient export by leaching and whole-tree harvesting in a loblolly pine and mixed oak forest

    D. W. Johnson;D. E. Todd

  • Forest nutrient and carbon pools at Walker Branch watershed: changes during a 21-year period

    Carl C. Trettin;D.W. Johnson;D.E. Todd

Frequent Co-Authors

Paul J. Hanson
Paul J. Hanson Oak Ridge National Laboratory
Dale W. Johnson
Dale W. Johnson University of Nevada Reno
Stan D. Wullschleger
Stan D. Wullschleger Oak Ridge National Laboratory
Charles T. Garten
Charles T. Garten Oak Ridge National Laboratory
Timothy J. Tschaplinski
Timothy J. Tschaplinski Oak Ridge National Laboratory
Carl C. Trettin
Carl C. Trettin US Forest Service
Michael A. Huston
Michael A. Huston Texas State University
Richard J. Norby
Richard J. Norby University of Tennessee at Knoxville
Robert M. Augé
Robert M. Augé University of Tennessee at Knoxville
Gerald A. Tuskan
Gerald A. Tuskan Oak Ridge National Laboratory

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