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Growth and population structure of timber species in Peruvian Amazon flood plains [An article from: Forest Ecology and Management]
Book Details
Author(s)G. Nebel, H. Meilby
PublisherElsevier
ISBN / ASINB000RR68TI
ISBN-13978B000RR68T6
MarketplaceFrance 🇫🇷
Description
This digital document is a journal article from Forest Ecology and Management, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
This study provides specific ecological information on growth and population structure of important timber tree species of the Peruvian Amazon flood plains: Guatteria sp., Terminalia oblonga, Hura crepitans, Guarea macrophylla, Maquira coriacea, Virola elongata, Virola pavonis, and Minquartia guianensis. Furthermore, methods that can be applied to study population structure and growth of trees in natural forests are developed upon. The study is based on data collected over a period of 8 years from permanent sample plots covering a total of 18.6ha in three flood plain forest types at the lower Rio Ucayali. The population structure of the eight species varied considerably with maximum diameters at breast height ranging from 31 to 140cm. For M. coriacea stem densities and basal areas were as high as 159ha^-^1 and 3.4m^2/ha, respectively, but for most other species, stem densities and basal areas were much lower. Seedling densities of the eight species ranged from 1 to 42,002ha^-^1 with a mortality of 27-100% per year and for some species a significant relationship was found between mortality and duration of the flooding period. Diameter increments were analyzed using a simple diameter class approach as well as a more sophisticated single-tree growth model, for which a variety of competition indices were screened. Based on the statistical performance and practicability of the indices it appeared that the most successful measure of competition was the local basal area of trees with diameters exceeding that of the individual in question.
Description:
This study provides specific ecological information on growth and population structure of important timber tree species of the Peruvian Amazon flood plains: Guatteria sp., Terminalia oblonga, Hura crepitans, Guarea macrophylla, Maquira coriacea, Virola elongata, Virola pavonis, and Minquartia guianensis. Furthermore, methods that can be applied to study population structure and growth of trees in natural forests are developed upon. The study is based on data collected over a period of 8 years from permanent sample plots covering a total of 18.6ha in three flood plain forest types at the lower Rio Ucayali. The population structure of the eight species varied considerably with maximum diameters at breast height ranging from 31 to 140cm. For M. coriacea stem densities and basal areas were as high as 159ha^-^1 and 3.4m^2/ha, respectively, but for most other species, stem densities and basal areas were much lower. Seedling densities of the eight species ranged from 1 to 42,002ha^-^1 with a mortality of 27-100% per year and for some species a significant relationship was found between mortality and duration of the flooding period. Diameter increments were analyzed using a simple diameter class approach as well as a more sophisticated single-tree growth model, for which a variety of competition indices were screened. Based on the statistical performance and practicability of the indices it appeared that the most successful measure of competition was the local basal area of trees with diameters exceeding that of the individual in question.
