Dynamics of branch population in the canopy of young scots pine stands |
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| Institution: | 1. Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, Zhejiang 311400, PR China;2. Qianjiangyuan Forest Ecosystem Research Station, State Forestry Administration, Hangzhou, Zhejiang 311400, PR China;1. Federal University of Viçosa, Department of Forestry, Campus Universitario, CEP 36570-000 Viçosa, MG, Brazil;2. University of Freiburg, Chair of Silviculture, Tennenbacherstraβe 4, 79106 Freiburg im Breisgau, Germany;1. School of Environmental and Forest Sciences, College of the Environment, University of Washington, Seattle, WA 98195, USA;2. Department of Forestry and Wildland Resources, Humboldt State University, Arcata, CA 95521, USA;1. Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Kyoto City 606-8502, Japan;2. Smithsonian Tropical Research Institute, Apartado 0843-03092, Balboa, Ancón, Panamá, Panama;3. Department of Forest Science, Tokyo University of Agriculture, Sakuragaoka 1-1-1, Setagaya, Tokyo 156-8502, Japan;4. Forest Research Centre, Sabah Forestry Department, 90715 Sandakan, Sabah, Malaysia |
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| Abstract: | Life tables were developed for the branch population in the canopy of young Scots pine (Pinus sylvestris L.) stands. The death of branches began when a branch cohort was 5–6 years old. Even in widely spaced stands, no branches older than 14 years were found. All the dead branches were pruned off when the age of a branch cohort exceeded 20 years. A model based on the per-capita rate of increase of branches and the carrying capacity of branches in a particular stand gave fairly good estimates of the cumulative number of branches in the canopy. The properties of the proposed model for the branch population are discussed. |
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