Soil Carbon Dynamics after Forest Harvest: An Ecosystem Paradigm Reconsidered

In one of the most influential studies in the recent history of forest ecology, W. W. Covington (1981) described a pattern in organic matter storage in the forest floors of northern hardwood stands as a function of date of harvest. We review the history of the use and misuse of Covington’s curve, describe the studies that tested and failed to support early interpretations of the curve, and provide some alternate interpretations. The curve suggested that forest floor organic matter declines by 50% within 20 years after harvest, and this decline was attributed to accelerated decomposition and changes in litter inputs after harvest. Subsequent studies showed that decomposition rates of surface litter generally decrease after clear-cutting, but accelerated decomposition remains possible in the Oe and Oa horizons. Changes in litter inputs are still difficult to evaluate, because the rate at which woody debris enters the forest floor is unknown. Although Covington attempted to minimize variation due to mechanical disturbance during logging, a reasonable alternative explanation for low organic matter in the forest floor of young stands is that surface material is mixed into mineral soil during harvesting operations. The pattern of forest floor organic matter in stands of different ages may be partly due to changes over time in logging technology and the intensity of biomass removal, in addition to successional effects. It is important to distinguish between mechanisms that release carbon to the atmosphere and those that transfer it to the mineral soil before making inferences about nutrient cycling and carbon sequestration.

[1]  M. G. Messina,et al.  Forest harvesting effects on soil temperature, moisture, and respiration in a bottomland hardwood forest , 1999 .

[2]  R. Qualls,et al.  Fluxes of Dissolved Organic Nutrients and Humic Substances in a Deciduous Forest , 1991 .

[3]  C. Federer,et al.  Subjectivity in the Separation of Organic Horizons of the Forest Floor1 , 1982 .

[4]  J. R. Wallis,et al.  Some ecological consequences of a computer model of forest growth , 1972 .

[5]  G. Hart.  Humus depths under cut and uncut northern hardwood forests , 1960 .

[6]  R. Birdsey,et al.  Processes affecting carbon storage in the forest floor and in downed woody debris. , 2002 .

[7]  R. L. Crocker,et al.  SOIL DEVELOPMENT IN RELATION TO VEGETATION AND SURFACE AGE AT GLACIER BAY, ALASKA* , 1955 .

[8]  R. Lal,et al.  Effects of harvesting intensity on forest productivity and soil carbon storage in a mixed oak forest. , 1998 .

[9]  N. Edwards,et al.  Soil carbon dynamics in a mixed deciduous forest following clear-cutting with and without residue removal , 1983 .

[10]  G M Woodwell,et al.  Global Deforestation: Contribution to Atmospheric Carbon Dioxide , 1983, Science.

[11]  Ji‐Hyung Park,et al.  Controls on the dynamics of dissolved organic matter in soils: a review. , 2000 .

[12]  D. Paré,et al.  Impacts of whole-tree harvesting and winter windrowing on soil pH and base status of clayey sites of northwestern Quebec , 1995 .

[13]  A. J. Friedland,et al.  ACCUMULATION AND DEPLETION OF BASE CATIONS IN FOREST FLOORS IN THE NORTHEASTERN UNITED STATES , 1999 .

[14]  T. Fahey,et al.  Root Decomposition and Nutrient Flux Following Whole-Tree Harvest of Northern Hardwood Forest , 1988, Forest Science.

[15]  B. A. Stewart,et al.  Advances in Soil Science , 1986, Advances in Soil Science.

[16]  D. Moorhead,et al.  Climate and litter quality controls on decomposition: An analysis of modeling approaches , 1999 .

[17]  D. W. Smith,et al.  Effects on the Forest Floor of Whole-Tree Harvesting in an Appalachian Oak Forest , 1985 .

[18]  George M. Woodwell,et al.  The flux of carbon from terrestrial ecosystems to the atmosphere in 1980 due to changes in land use: geographic distribution of the global flux , 1987 .

[19]  T. Fahey,et al.  Dead bole mass and nutrients remaining 23 years after clear-felling of a northern hardwood forest , 1993 .

[20]  W. Currie,et al.  The Imprint of Land-use History: Patterns of Carbon and Nitrogen in Downed Woody Debris at the Harvard Forest , 2002, Ecosystems.

[21]  J. Kelly,et al.  Carbon forms and functions in forest soils. , 1995 .

[22]  R. B. Jackson,et al.  THE VERTICAL DISTRIBUTION OF SOIL ORGANIC CARBON AND ITS RELATION TO CLIMATE AND VEGETATION , 2000 .

[23]  C. Trettin,et al.  Forest nutrient and carbon pools at Walker Branch watershed: changes during a 21-year period , 1999 .

[24]  Daniel B. Botkin,et al.  Predicting the effects of different harvesting regimes on forest floor dynamics in northern hardwoods , 1978 .

[25]  C. Federer.  Organic matter and nitrogen content of the forest floor in even-aged northern hardwoods , 1984 .

[26]  M. Harmon,et al.  Ecology of Coarse Woody Debris in Temperate Ecosystems , 1986 .

[27]  A. Lugo,et al.  Steady state terrestrial ecosystems and the global carbon cycle , 1986, Vegetatio.

[28]  Currie.  The responsive C and N biogeochemistry of the temperate forest floor. , 1999, Trends in ecology & evolution.

[29]  G. Likens,et al.  The biota and the world carbon budget. , 1978, Science.

[30]  R. K. Dixon,et al.  Carbon Pools and Flux of Global Forest Ecosystems , 1994, Science.

[31]  G. Woodwell,et al.  Changes in the Carbon Content of Terrestrial Biota and Soils between 1860 and 1980: A Net Release of CO"2 to the Atmosphere , 1983 .

[32]  C. Federer,et al.  Challenges of measuring forest floor organic matter dynamics:: Repeated measures from a chronosequence , 2000 .

[33]  J. Aber,et al.  Leaf Production During Secondary Succession in Northern Hardwoods , 1980 .

[34]  T. Vinson,et al.  Carbon sources and sinks in forest biomes of the former Soviet Union , 1993 .

[35]  H. Lull,et al.  The role of forest humus in watershed management in New England , 1956 .

[36]  F. Ponder,et al.  Fine root dynamics across a chronosequence of upland temperate deciduous forests. , 2000 .

[37]  C. Fastie,et al.  Causes and Ecosystem Consequences of Multiple Pathways of Primary Succession at Glacier Bay, Alaska , 1995 .

[38]  M. Witkamp.  Soils as components of ecosystems , 1971 .

[39]  John Pastor,et al.  Response of northern forests to CO2-induced climate change , 1988, Nature.

[40]  W. D. Billings.  The Structure and Development of Old Field Shortleaf Pine Stands and Certain Associated Physical Properties of the Soil , 1938 .

[41]  W. McDowell,et al.  Vertical transport of dissolved organic C and N under long-term N amendments in pine and hardwood forests , 1996 .

[42]  Dale W. Johnson.  Effects of forest management on soil carbon storage , 1992 .

[43]  C. W. Martin.  Soil Disturbance by Logging in New England̶Review and Management Recommendations , 1988 .

[44]  Ralph D. Nyland,et al.  Silviculture: Concepts and Applications , 1996 .

[45]  W. Swank,et al.  Soil and detrital carbon dynamics following forest cutting in the Southern Appalachians , 1989, Biology and Fertility of Soils.

[46]  T. Fahey,et al.  Further Studies of Root Decomposition Following Harvest of a Northern Hardwoods Forest , 1994, Forest Science.

[47]  W. Post,et al.  Influence of climate, soil moisture, and succession on forest carbon and nitrogen cycles , 1986 .

[48]  G. Mroz,et al.  Soil nutrient changes following whole tree harvesting on three northern hardwood sites , 1985 .

[49]  J. Liski,et al.  Carbon storage in forest soil of Finland. 2. Size and regional pattern , 1997 .

[50]  Charles A. S. Hall,et al.  AN ASSESSMENT OF SEVERAL OF THE HISTORICALLY MOST INFLUENTIAL THEORETICAL MODELS USED IN ECOLOGY AND OF THE DATA PROVIDED IN THEIR SUPPORT , 1988 .

[51]  G. Likens,et al.  Long-Term Studies in Ecology: Approaches and Alternatives , 1990 .

[52]  W. Schlesinger.  Carbon Balance in Terrestrial Detritus , 1977 .

[53]  R. S. Sartz,et al.  Some factors affecting humus development in the Northeast. , 1950 .

[54]  T. Fahey,et al.  Litterfall dynamics and ecosystem recovery during forest development , 1994 .

[55]  W. McDowell,et al.  Origin, Composition, and Flux of Dissolved Organic Carbon in the Hubbard Brook Valley , 1988 .

[56]  T. Huntington,et al.  Redistribution of soil nitrogen, carbon and organic matter by mechanical disturbance during whole-tree harvesting in northern hardwoods , 1992 .

[57]  D. Foster.  From coastal wilderness to fruited plain , 1995 .

[58]  R. L. Crocker,et al.  A CHRONOSEQUENCE OF SOILS AND VEGETATION NEAR MT. SHASTA, CALIFORNIA: II. THE DEVELOPMENT OF THE FOREST FLOORS AND THE CARBON AND NITROGEN PROFILES OF THE SOILS , 1953 .

[59]  Peter M. Vitousek,et al.  Changes in soil phosphorus fractions and ecosystem dynamics across a long chronosequence in Hawaii. , 1995 .

[60]  Richard A. Houghton,et al.  Land‐use change and the carbon cycle , 1995 .

[61]  Gene E. Likens,et al.  Pattern and Process in a Forested Ecosystem , 1980 .

[62]  Charles F. Cooper,et al.  Carbon storage in managed forests , 1983 .

[63]  T. Huntington,et al.  Whole-tree-harvesting effects on soil nitrogen and carbon , 1990 .

[64]  Steward T. A. Pickett,et al.  Space-for-Time Substitution as an Alternative to Long-Term Studies , 1989 .

[65]  Henry Chandler Cowles,et al.  The Ecological Relations of the Vegetation on the Sand Dunes of Lake Michigan [Continued] , 1899, Botanical Gazette.

[66]  G. Likens,et al.  Clearcutting northern hardwoods: effects on hydrologic and nutrient ion budgets , 1986 .

[67]  C. Johnson.  Soil nitrogen status 8 years after whole-tree clear-cutting , 1995 .

[68]  William S. Currie,et al.  Modeling leaching as a decomposition process in humid montane forests , 1997 .

[69]  C. Prescott,et al.  Effects of clear-cutting on decomposition rates of litter and forest floor in forests of British Columbia , 2000 .

[70]  D. Binkley.  Does forest removal increase rates of decomposition and nitrogen release , 1984 .

[71]  P. Reich,et al.  Predicting the effects of climate change on water yield and forest production in the northeastern United States , 1995 .

[72]  T. Siccama,et al.  Carbon dynamics following clear-cutting of a northern hardwood forest , 1995 .

[73]  P. Marks,et al.  THE ROLE OF PIN CHERRY (PRUNUS PENSYLVANICA L.) IN THE MAINTENANCE OF STABILITY IN NORTHERN , 1974 .

[74]  John Lichter Dunes.  PRIMARY SUCCESSION AND FOREST DEVELOPMENT ON , 1998 .

[75]  G. Whitney,et al.  From Coastal Wilderness to Fruited Plain: A History of Environmental Change in Temperate North America from 1500 to the Present. , 1995 .

[76]  C. Prescott.  Effects of clearcutting and alternative silvicultural systems on rates of decomposition and nitrogen mineralization in a coastal montane coniferous forest , 1997 .

[77]  O. Hendrickson,et al.  Nutrient cycling following whole-tree and conventional harvest in northern mixed forest , 1989 .

[78]  K. Mattson,et al.  Detrital organic matter and soil CO2 efflux in forests regenerating from cutting in West Virginia , 1993 .

[79]  R. Houghton,et al.  Land-use change in the Soviet Union between 1850 and 1980: causes of a net release of CO2 to the atmosphere , 1988 .

[80]  W. Covington.  Changes in Forest Floor Organic Matter and Nutrient Content Following Clear Cutting in Northern Hardwoods , 1981 .

[81]  P. Curtis,et al.  Effects of Forest Management on Soil C and N Storage: Meta Analysis , 2001 .

[82]  Jeffrey W. Hughes,et al.  Fine Root Dynamics in a Northern Hardwood Forest Ecosystem, Hubbard Brook Experimental Forest, NH , 1994 .

[83]  John D. Aber,et al.  Predicting the Effects of Rotation Length, Harvest Intensity, and Fertilization on Fiber Yield From Northern Hardwood Forests in New England , 1982 .

[84]  M. Harmon,et al.  Effects on Carbon Storage of Conversion of Old-Growth Forests to Young Forests , 1990, Science.

[85]  V. Meentemeyer,et al.  Macroclimate and Lignin Control of Litter Decomposition Rates , 1978 .

[86]  C. Cronan,et al.  Effects of disturbance and soil amendments on dissolved organic carbon and organic acidity in red pine forest floors , 1992 .

[87]  kimg.  Decomposition of woody debris in a regenerating , clear-cut forest in the Southern , 2004 .

[88]  R. Yanai.  Phosphorus budget of a 70-year-old northern hardwood forest , 1992 .

[89]  J. Blair,et al.  LITTER DECOMPOSITION, NITROGEN DYNAMICS AND LITTER MICROARTHROPODS IN A SOUTHERN APPALACHIAN HARDWOOD FOREST 8 YEARS FOLLOWING CLEARCUTTING , 1988 .

[90]  R. K. Dixon,et al.  Influence of canopy removal on oak forest floor decomposition , 1989 .

[91]  John D. Aber,et al.  FOLIAGE-HEIGHT PROFILES AND SUCCESSION IN NORTHERN HARDWOOD FORESTS' , 1979 .

[92]  J. Aber,et al.  A generalized, lumped-parameter model of photosynthesis, evapotranspiration and net primary production in temperate and boreal forest ecosystems , 1992, Oecologia.