Thank you for helping! Your input will affect cover photo selection, along with input from other users. Study on the wood anatomy, annual wood increment and intra- annual growth dynamics of Podocarpus oleifolius var. Schmidt. Abstract. Tropical countries in the future will have an increasing demand for softwoods which favours mixed plantations possibly with minor portions of native conifer species. In this context numerous tropical species of the Podocarpaceae can be of ecological and economical interest. In Costa Rica the native species Podocarpus oleifolius var. However, profound knowledge on growth characteristics and wood properties is missing. In particular, information on the annual wood increment and intra- annual growth dynamics under natural site conditions at higher altitudes where P.
At the Cordillera de Talamanca (approx. Costa Rica, an old- growth stand was chosen from which in total 5 trees (4. DBH) were sampled by taking stem sections and discs (2 trees)or increment cores (3 trees). During the period from October 1. December 2. 00. 0, two trees of the site were pinned monthly for exact determination of the annual wood increment and the intra- annual growth dynamics in relationship to climate. The results of one of these pinned trees are demonstrated. It turned out that at high altitude the annual wood increment of old growth trees amounts to 1- 2 mm (diameter) only. Comment on “The Response of Vegetation on the Andean Flank in Western Amazonia to Pleistocene Climate Change ” Surangi W. Dalling,1,2 Carlos Jaramillo,2 Benjamin L. The tracheids show a rather constant cell wall thickness (2. The exact age of the tree cannot be determined anatomically, as there are no distinct tree- ring boundaries, but only very moderately developed terminal bands of flattened tracheids which do not circle the entire circumference of the stem. The monthly pin- labelling documents that during the dry season from about January until March in 1. However, with the beginning of the rainy season, about 5. April to June. This increment rate already decreased from July to September to 3. Due to a distinct decrease in precipitation towards the end of the year, only 9 % of the wood increment were formed in the last quarter of the year, mainly consisting of the hardly visible terminal and flattened tracheids. The wood of this species is of very homogeneous structure and certainly attractive for highquality wood production. Podocarpus oleifolius; Podocarpus pendulifolius; Podocarpus tepuiensis; section Lanceolatis (southern Mexico, Puerto Rico, Lesser Antilles, Venezuela to highland Bolivia) Podocarpus coriaceus; Podocarpus matudai; Podocarpus.
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