Carbon distribution and aboveground net primary production in aspen, jack pine, and black spruce stands in Saskatchewan and Manitoba, Canada

The objectives of this study are to (1) characterize the carbon (C) content, leaf area index, and aboveground net primary production (ANPP) for mature aspen, black spruce, and young and mature jack pine stands at the southern and northern Boreal Ecosystem-Atmosphere Study (BOREAS) areas and (2) compare net primary production and carbon allocation coefficients for the major boreal forest types of the world. Direct estimates of leaf area index, defined as one half of the total leaf surface area, range from a minimum of 1.8 for jack pine forests to a maximum of 5.6 for black spruce forests; stems comprise 5 to 15% of the total overstory plant area. In the BOREAS study, total ecosystem (vegetation plus detritus plus soil) carbon content is greatest in the black spruce forests (445,760–479,380 kg C ha−1), with 87 to 88% of the C in the soil, and is lowest in the jack pine stands (68,370–68,980 kg C ha−1) with a similar distribution of carbon in the vegetation and soil. Forest floor carbon content and mean residence time (MRT) also vary more among forest types in a study area than between study areas for a forest type; forest floor MRT range from 16 to 19 years for aspen stands to 28 to 39 years for jack pine stands. ANPP differs significantly among the mature forests at each of the BOREAS study areas, ranging from a maximum of 3490 to 3520 kg C ha−1 yr−1 for aspen stands to 1170 to 1220 kg C ha−1 yr−1 for jack pine stands. Both net primary production (NPP) and carbon allocation differ between boreal evergreen and deciduous forests in the world, suggesting global primary production models should distinguish between these two forest types. On average, 56% of NPP for boreal forests occurs as detritus and illustrates the need to better understand factors controlling aboveground and below-ground detritus production in boreal forests.

[1]  S. Gower,et al.  Carbon and Nitrogen Dynamics of Boreal Jack Pine Stands With and Without a Green Alder Understory , 1998, Ecosystems.

[2]  S. T. Gower,et al.  Characterizing canopy nonrandomness with a multiband vegetation imager (MVI) , 1997 .

[3]  G. Collatz,et al.  Profiles of photosynthetically active radiation, nitrogen and photosynthetic capacity in the boreal forest: Implications for scaling from leaf to canopy , 1997 .

[4]  S. T. Gower,et al.  Leaf area index of boreal forests: theory, techniques, and measurements , 1997 .

[5]  John M. Norman,et al.  Root mass, net primary production and turnover in aspen, jack pine and black spruce forests in Saskatchewan and Manitoba, Canada. , 1997, Tree physiology.

[6]  S. Gower,et al.  Interrelationships among the edaphic and stand characteristics, leaf area index, and aboveground net primary production of upland forest ecosystems in north central Wisconsin , 1997 .

[7]  Michael G. Ryan,et al.  Age-Related Decline in Forest Productivity: Pattern and Process , 1997 .

[8]  S. Gower,et al.  Applications of physiological ecology to forest management , 1996 .

[9]  S. Gower,et al.  Aboveground net primary production decline with stand age: potential causes. , 1996, Trends in ecology & evolution.

[10]  R. Ruess,et al.  Contributions of fine root production and turnover to the carbon and nitrogen cycling in taiga forests of the Alaskan interior , 1996 .

[11]  Lawrence E. Band,et al.  Modelling temporal variability in the carbon balance of a spruce/moss boreal forest , 1996 .

[12]  C. D. Keeling,et al.  Increased activity of northern vegetation inferred from atmospheric CO2 measurements , 1996, Nature.

[13]  P. Polglase,et al.  Carbon balance in the tundra, boreal forest and humid tropical forest during climate change: scaling up from leaf physiology and soil carbon dynamics , 1995 .

[14]  K. Jon Ranson,et al.  The Boreal Ecosystem-Atmosphere Study (BOREAS) : an overview and early results from the 1994 field year , 1995 .

[15]  P. Ciais,et al.  A Large Northern Hemisphere Terrestrial CO2 Sink Indicated by the 13C/12C Ratio of Atmospheric CO2 , 1995, Science.

[16]  S. Gower,et al.  Carbon allocation and accumulation in conifers , 1995 .

[17]  S. T. Gower,et al.  A comparison of optical and direct methods for estimating foliage surface area index in forests , 1994 .

[18]  Richard H. Waring,et al.  Environmental Limits on Net Primary Production and Light‐Use Efficiency Across the Oregon Transect , 1994 .

[19]  Henry L. Gholz,et al.  Climatic factors controlling the productivity of pine stands: a model-based analysis , 1994 .

[20]  U. Siegenthaler,et al.  Atmospheric carbon dioxide and the ocean , 1993, Nature.

[21]  Karin S. Fassnacht,et al.  Influence of fertilization on the allometric relations for two pines in contrasting environments , 1993 .

[22]  S. Running,et al.  Simulated dry matter yields for aspen and spruce stands in the North American boreal forest , 1992 .

[23]  B. Tilbrook,et al.  Oceanic Uptake of Fossil Fuel CO2: Carbon-13 Evidence , 1992, Science.

[24]  S. Gower,et al.  CARBON DYNAMICS OF ROCKY MOUNTAIN DOUGLAS-FIR: INFLUENCE OF WATER AND NUTRIENT AVAILABILITY' , 1992 .

[25]  W. Schlesinger.  Biogeochemistry: An Analysis of Global Change , 1991 .

[26]  L. Finér.  Effect of fertilization on dry mass accumulation and nutrient cycling in Scots pine on an ombrotrophic bog. , 1991 .

[27]  I. Fung,et al.  Observational Contrains on the Global Atmospheric Co2 Budget , 1990, Science.

[28]  Leena Finér,et al.  Biomass and nutrient cycle in fertilized and unfertilized pine, mixed birch and pine and spruce stands on a drained mire. , 1989 .

[29]  J. Bockheim,et al.  Biomass, net primary production and nutrient distribution for an age sequence of Populus tremuloides ecosystems , 1988 .

[30]  W. Oechel,et al.  The Role of Bryophytes in Nutrient Cycling in the Taiga , 1986 .

[31]  D. F. Grigal,et al.  Biomass and productivity of the woody strata of forested bogs in northern Minnesota. , 1985 .

[32]  Richard H. Waring,et al.  Forest Ecosystems: Concepts and Management , 1985 .

[33]  D. F. Grigal.  Sphagnum production in forested bogs of northern Minnesota. , 1985 .

[34]  Leslie A. Viereck,et al.  Productivity and nutrient cycling in taiga forest ecosystems , 1983 .

[35]  K. Cleve,et al.  Nutrient cycling in relation to decomposition and organic-matter quality in taiga ecosystems , 1983 .

[36]  Henry L. Gholz,et al.  Environmental Limits on Aboveground Net Primary Production, Leaf Area, and Biomass in Vegetation Zones of the Pacific Northwest , 1982 .

[37]  I. Morrison,et al.  DISTRIBUTION AND CYCLING OF NUTRIENTS IN A NATURAL PINUS BANKSIANA ECOSYSTEM , 1976 .

[38]  G. Likens,et al.  Carbon in the biota. , 1973, Brookhaven symposia in biology.

[39]  J. M. Stewart,et al.  The Relationship Between Net Primary Production and Accumulation for a Peatland in Southeastern Manitoba , 1972 .