Leaf area index of an old-growth Douglas-fir forest estimated from direct structural measurements in the canopy

Leaf area index (LAI) in old-growth Douglas-fir (Pseudotsuga menziesii var menziesii (Mirb.) Franco) forests exceeds that of any other forest ecosystem by some estimates; however, LAI determinations in coniferous forests have generally been indirect, involving extrapolations of patterns observed in younger stands. Aided by a 75-m construction crane for canopy access, we used a vertical line-intercept method to estimate LAI for a 450-year-old Douglas-fir - western hemlock (Tsuga heterophylla (Raf.) Sarg.) forest in southwestern Washington state. LAI was calculated as the product of foliage contact frequency and an "extinction coefficient" accounting for foliage angular distribution, geometry, and the ratio of "interceptable" to total leaf area. LAI estimates were 9.3 ± 2.1 (estimate ± 95% confidence interval), 8.5 ± 2.2, and 8.2 ± 1.8 in 1997, 1998, and 1999, respectively, or 8.6 ± 1.1 pooled across years. Understory vegetation, including foliage of woody stems <5 cm diameter, represented 20% of this total...

[1]  Conversion of total to projected leaf area index in conifers , 2000 .

[2]  R. Küssner,et al.  Comparison of direct and indirect estimation of leaf area index in mature Norway spruce stands of eastern Germany , 2000 .

[3]  J. Means,et al.  Assessing alternative allometric algorithms for estimating leaf area of Douglas-fir trees and stands. , 2000 .

[4]  E. D. Ford,et al.  Height growth and vertical development of an old-growth Pseudotsuga-Tsuga forest in southwestern Washington State, U.S.A. , 2000 .

[5]  William E. Winner,et al.  A rotated ellipsoidal angle density function improves estimation of foliage inclination distributions in forest canopies , 2000 .

[6]  W. Cohen,et al.  Lidar Remote Sensing of the Canopy Structure and Biophysical Properties of Douglas-Fir Western Hemlock Forests , 1999 .

[7]  F. Bazzaz,et al.  ASYMPTOTIC HEIGHT AS A PREDICTOR OF PHOTOSYNTHETIC CHARACTERISTICS IN MALAYSIAN RAIN FOREST TREES , 1999 .

[8]  G. Russell,et al.  Leaf area index estimates obtained for clumped canopies using hemispherical photography , 1999 .

[9]  A. Cutini,et al.  Estimation of leaf area index with the Li-Cor LAI 2000 in deciduous forests , 1998 .

[10]  K. Kram.  Influence of species composition and forest age on leaf area index , 1998 .

[11]  Ramakrishna R. Nemani,et al.  Measurement and remote sensing of LAI in Rocky Mountain montane ecosystems , 1997 .

[12]  Steven E. Franklin,et al.  Estimation of forest Leaf Area Index using remote sensing and GIS data for modelling net primary production , 1997 .

[13]  Peter E. Thornton,et al.  Simulating forest productivity and surface-atmosphere carbon exchange in the BOREAS study region. , 1997, Tree physiology.

[14]  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 .

[15]  D. Groeneveld,et al.  Vertical point quadrat sampling and an extinction factor to calculate leaf area index , 1997 .

[16]  G. Parker.  Canopy structure and light environment of an old-growth Douglas-fir/Western hemlock forest , 1997 .

[17]  K. O’Hara.  Dynamics and Stocking-Level Relationships of Multi-Aged Ponderosa Pine Stands , 1996 .

[18]  J. Chen.  Optically-based methods for measuring seasonal variation of leaf area index in boreal conifer stands , 1996 .

[19]  The relationship between leaf area and basal area growth in jack and red pine trees , 1996 .

[20]  J. Chen,et al.  Retrieving Leaf Area Index of Boreal Conifer Forests Using Landsat TM Images , 1996 .

[21]  M. North,et al.  Analyzing canopy structure in Pacific Northwest old-growth forests with a stand-scale crown model , 1996 .

[22]  Sean C. Thomas,et al.  Ontogenetic changes in leaf size in Malaysian rain forest trees , 1995 .

[23]  Jing M. Chen,et al.  Quantifying the effect of canopy architecture on optical measurements of leaf area index using two gap size analysis methods , 1995, IEEE Trans. Geosci. Remote. Sens..

[24]  G. Parker,et al.  Structure and microclimate of forest canopies. , 1995 .

[25]  P. Stenberg,et al.  Photosynthetic Light Capture and Processing from Cell to Canopy , 1995 .

[26]  F. Berninger,et al.  Foliage area-sapwood area relationships of Scots pine (Pinus sylvestris) trees in different climates , 1994 .

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

[28]  Richard H. Waring,et al.  Evidence of Reduced Photosynthetic Rates in Old Trees , 1994, Forest Science.

[29]  W. Schlesinger,et al.  Biomass Allocation of Montane and Desert Ponderosa Pine: An Analog for Response to Climate Change , 1994 .

[30]  Alain Royer,et al.  Measuring Leaf Area Index with the Li‐Cor LAI‐2000 in Pine Stands , 1994 .

[31]  P. Gong,et al.  Remote Sensing of Seasonal Leaf Area Index Across the Oregon Transect , 1994 .

[32]  J. Randerson,et al.  Terrestrial ecosystem production: A process model based on global satellite and surface data , 1993 .

[33]  S. Ustin,et al.  Estimation of tree canopy leaf area index by gap fraction analysis , 1993 .

[34]  J. M. Chen,et al.  Effects of clumping on estimates of stand leaf area index using the LI-COR LAI-2000 , 1993 .

[35]  J. Chen,et al.  Defining leaf area index for non‐flat leaves , 1992 .

[36]  J. Chen,et al.  Measuring leaf area index of plant canopies with branch architecture , 1991 .

[37]  J. N. Long,et al.  Response of leaf area index to density for two contrasting tree species , 1991 .

[38]  S. T. Gower,et al.  Rapid Estimation of Leaf Area Index in Conifer and Broad-Leaf Plantations , 1991 .

[39]  G. Campbell.  Derivation of an angle density function for canopies with ellipsoidal leaf angle distributions , 1990 .

[40]  J. M. Norman,et al.  Plant Canopies: Their Growth, Form and Function: The description and measurement of plant canopy structure , 1989 .

[41]  Ramakrishna R. Nemani,et al.  Testing a theoretical climate-soil-leaf area hydrologic equilibrium of forests using satellite data and ecosystem simulation , 1989 .

[42]  J. Franklin,et al.  Old-Growth Douglas-Fir and Western Hemlock: A 36-Year Record of Growth and Mortality , 1987 .

[43]  J. Marshall,et al.  Comparison of Methods of Estimating Leaf‐Area Index In Old‐Growth Douglas‐Fir , 1986 .

[44]  G. Campbell.  Extinction coefficients for radiation in plant canopies calculated using an ellipsoidal inclination angle distribution , 1986 .

[45]  P. G. Jarvis,et al.  Productivity of temperate de-ciduous and evergreen forests , 1983 .

[46]  Richard H. Waring,et al.  Application of the pipe model theory to predict canopy leaf area. , 1982 .

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

[48]  M. Kaufmann,et al.  The relationship of leaf area and foliage biomass to sapwood conducting area in four subalpine forest tree species , 1981 .

[49]  D. J. Fitter,et al.  STAND STRUCTURE AND LIGHT PENETRATION , 1980 .

[50]  James K. Brown,et al.  Comparison of Tree Biomass Estimators—DBH and Sapwood Area , 1978 .

[51]  R. Kato,et al.  Plant biomass and growth increment studies in Pasoh Forest , 1978 .

[52]  S. Running,et al.  Leaf Area of Mature Northwestern Coniferous Forests: Relation to Site Water Balance , 1977 .

[53]  Richard H. Waring,et al.  Leaf area differences associated with old-growth forest communities in the western Oregon Cascades , 1976 .

[54]  R. Whittaker,et al.  The Pygmy Forest Region of Northern California: Studies on Biomass and Primary Productivity , 1975 .

[55]  Arthur Cronquist,et al.  Flora of the Pacific Northwest , 1974 .

[56]  C. T. Dyrness,et al.  Federal research natural areas in Oregon and Washington : a guidebook for scientists and educators , 1972 .

[57]  E. D. Ford,et al.  The Leaf Canopy of a Coppiced Deciduous Woodland: I. Development and Structure , 1971 .

[58]  T. Kira,et al.  Structure of forest canopies as related to their primary productivity , 1969 .

[59]  J. B. Pearson,et al.  Methodology in Social Research. , 1968 .

[60]  G. M. Woodwell,et al.  SURFACE AREA RELATIONS OF WOODY PLANTS AND FOREST COMMUNITIES , 1967 .

[61]  H. Lilliefors.  On the Kolmogorov-Smirnov Test for Normality with Mean and Variance Unknown , 1967 .

[62]  Margaret C. Anderson.  Stand Structure and Light Penetration. II. A Theoretical Analysis , 1966 .

[63]  J. W. Wilson,et al.  Stand Structure and Light Penetration. I. Analysis by Point Quadrats , 1965 .

[64]  Jw Wilson.  Errors resulting from thickness of point quadrats , 1963 .

[65]  D. Watson.  Comparative Physiological Studies on the Growth of Field Crops: I. Variation in Net Assimilation Rate and Leaf Area between Species and Varieties, and within and between Years , 1947 .