Foliage-Height Profiles and Succession in Northern Hardwood Forests Export

@article{citeulike:2621991, abstract = {Leaf area index (LAI) and foliage-height profiles were determined for 13 northern hardwood stands ranging from 3 to 57 yr since clearcutting and for 1 uncut stand. Leaf litter collection and stratified clipping were used to measure LAI which showed no relationship to total canopy height or foliage-height distribution, and recovered quickly to near mature forest levels following cutting. A camera and telephoto lens were used to measure the distribution of heights to lowest leaf in the 12 oldest stands (7 / yr). Distributions were converted to foliage-height profiles using equations from MacArthur and Horn (1969). Profiles in the 2 youngest stands (3 and 4 yr) were determined by stratified clipping. Total canopy height varies predictably with age and is the major determinant of foliage-height diversity calculated using data in 1-m intervals by height. The concentration of foliage into a definable stratum occurs early in succession and persists through year 30. An associated lack of understory in this period results in a reduced foliage-height diversity using data normalized to a 4 strata per profile. Beyond year 30, canopy structure is variable but mature stands generally have leaves evenly distributed by height.}, author = {Aber, John D.}, citeulike-article-id = {2621991}, citeulike-linkout-0 = {http://www.jstor.org/stable/1936462}, journal = {Ecology}, keywords = {crown, foliage-height, succession}, number = {1}, pages = {18--23}, posted-at = {2008-04-02 05:40:08}, priority = {2}, title = {Foliage-Height Profiles and Succession in Northern Hardwood Forests}, url = {http://www.jstor.org/stable/1936462}, volume = {60}, year = {1979} }

TY - JOUR ID - citeulike:2621991 L3 - citeulike-article-id:2621991 N2 - Leaf area index (LAI) and foliage-height profiles were determined for 13 northern hardwood stands ranging from 3 to 57 yr since clearcutting and for 1 uncut stand. Leaf litter collection and stratified clipping were used to measure LAI which showed no relationship to total canopy height or foliage-height distribution, and recovered quickly to near mature forest levels following cutting. A camera and telephoto lens were used to measure the distribution of heights to lowest leaf in the 12 oldest stands (7 / yr). Distributions were converted to foliage-height profiles using equations from MacArthur and Horn (1969). Profiles in the 2 youngest stands (3 and 4 yr) were determined by stratified clipping. Total canopy height varies predictably with age and is the major determinant of foliage-height diversity calculated using data in 1-m intervals by height. The concentration of foliage into a definable stratum occurs early in succession and persists through year 30. An associated lack of understory in this period results in a reduced foliage-height diversity using data normalized to a 4 strata per profile. Beyond year 30, canopy structure is variable but mature stands generally have leaves evenly distributed by height. IS - 1 JF - Ecology EP - 23 TI - Foliage-Height Profiles and Succession in Northern Hardwood Forests VL - 60 SP - 18 KW - crown KW - foliage-height KW - succession AU - Aber, John PY - 1979/// UR - http://www.jstor.org/stable/1936462 ER -