Question

LAI model for forest species

Does anybody knows how modelling the predicted maximum leaf area index for forest species?
May 23, 2012

Topics

0 / 0  ·  9 Answers  ·  131 Views

All Answers (9)

  • Mauricio Oliveros Díaz · National University of Colombia
    Forest may produce up to 20 ha of leaves for each ha of land occupied
    May 23, 2012
  • Mauricio Oliveros Díaz · National University of Colombia
    The same units (m2) are used for leaf area and ground area; hence LAI is a dimensionless measure of
    the amount of leaf cover. The LAI varies with tree species and genotype, plant size and age, spacing of
    trees, and factors that infl uence the number and size of leaves. Climate has a strong infl uence on both the maximum LAI a forest can develop and on its rate of development (Margolis et al., 1995)
    May 23, 2012
  • Mauricio Oliveros Díaz · National University of Colombia
    As a forest grows, its LAI increases to a maximum
    and either stabilizes or decreases thereafter (Kozlowski
    et al., 1991). In forest stands net primary production
    (NPP: the sum of increases in biomass, litter production,
    and amount of biomass consumed by animals
    and microbial decomposers) is positively correlated
    with LAI up to some value. At higher LAI values NPP
    typically decreases, refl ecting tree mortality and reduction
    in the rate of photosynthesis of lower, shaded
    leaves. The slow growth and long leaf life spans of
    conifer leaves are associated with their higher LAI
    values (up to 20) over those of deciduous forest stands
    (3 to 6) (Waring and Schlesinger, 1985), as well as later
    development of maximum LAI in conifer stands. In the
    temperate zone conifer stands typically achieve
    maximum LAI in 25 to 40 years as compared to fi ve
    years in some deciduous forests
    May 23, 2012
  • Mauricio Oliveros Díaz · National University of Colombia
    The fundamental role of reserves and hydraulic constraints in predicting LAI and carbon allocation in forests, a article of Bady H. and Boreaux

    other article for read is. Leaf dynamics of a deciduous forest canopy:
    no response to elevated CO2
    May 23, 2012
  • Michael Larman ·
    Here's an article that may help:

    http://www.fs.fed.us/pnw/mdr/mapss/publications/pdf/luo-et-al2002.pdf

    Here's an instrument that may help:

    http://cid-inc.com/ci-110.php
    May 23, 2012
  • Dahlia Karto · Universitas Negeri Malang
    Get minimal area at plant ecology method we can accounted
    May 23, 2012
  • Alessio Collalti · Università degli Studi della Tuscia
    currently I'm trying with the pipe model
    Jun 6, 2012
  • Rebecca Bowler · University of Northern British Columbia
    By pipe model I assume you're using hydraulic conductivity and data like sapwood area and basal area? That is likely a good model to use; however, if you're limited on data for your own research area using dbh and allometric equations already developed (if available) can be a good rough estimate. Conversely, you could create your own equations by subsampling your population (which would require cutting and actually weighing the portions of trunk, branch, root, foliage). Not ideal. Allometry is a nice method if it applies to the right tree species relatively close to your own region.
    Jun 19, 2012
  • Alessio Collalti · Università degli Studi della Tuscia
    You right!
    Jun 19, 2012

Question Followers (6)