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US Forest Service Research & Development
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  • US Forest Service Research & Development
  • 1400 Independence Ave., SW
  • Washington, D.C. 20250-0003
  • 800-832-1355
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Mac Callaham

Team Leader/Research Ecologist
320 Green Street
Athens
Georgia
United States
30602-2044

Phone: 706-559-4321
Contact Mac Callaham


Current Research

I am interested in soil ecosystem responses to natural disturbances (fire, wind, and flood), forest management practices which seek to simulate disturbances (prescribed fire, thinning, harvesting), and anthropogenic disturbances (e.g. invasive species).  I am particularly interested in responses of soil biota (e.g. earthworms, herbivorous insects, soil microbes, etc.) to these disturbances and land management practices, and how changes in invertebrate assemblages may lead to changes in other components of forest systems (e.g. nutrient relationships, plant-herbivore relationships).  In addition to pure soil biology, I am also interested in elemental dynamics, and specifically the effects of prescribed fire on soil organic matter and toxics (soil carbon, nitrogen, and mercury).

Education

  • Kansas State University, Ph.D. Biology 2000
  • University of Georgia, M.S. Agronomy 1996
  • University of Georgia, B.A. English 1994
  • University of Georgia, B.S. Zoology 1994

Featured Publications & Products

Publications

Research Highlights

HighlightTitleYear


SRS-2016-77
Earthworms, Millipedes, and Soil Carbon in the Eastern U.S.

Earthworms, millipedes, and other soil invertebrates directly contribute to forest soil processes such as leaf litter decomposition and soil org ...

2016


SRS-2017-165
Invasive earthworms have unexpected effects on other soil organisms

Invasive earthworms alter the structure and function of soil. Forest Service scientists show that these earthworms decrease the abundance of spr ...

2017


SRS-2015-213
Prescribed Fire to Stem the Tide of Earthworm Invasion

Asian earthworms are currently invading eastern deciduous forests from Georgia to Vermont. Because these earthworms eat leaf litter in the fores ...

2015


SRS-2014-132
Short-circuiting an Invasional Meltdown

Chinese privet is an invasive plant species in flood plain forests of the southeastern U.S., in some cases occupying up to 80 percent of availab ...

2014


SRS-2017-136
Soil fauna are of vital importance to soil processes and deserve attention

Although soil fauna are critically important for many ecosystem services, they are often neglected by researchers. Scientists at the Forest Serv ...

2017


Last updated on : 07/12/2019