共查询到20条相似文献，搜索用时 31 毫秒
1.
Florence Trum Hugues Titeux Jacques Ranger Bruno Delvaux 《Annals of Forest Science》2011,68(4):837-847
• Background
Among forest management practices, forest tree species substitution influences biogeochemical cycles and soil interactions rapidly (decades) and significantly. 相似文献2.
• Introduction
Commercial thinning (CT) could contribute to increase short-term tree growth and be beneficial in a cold climate, as in boreal regions. Thus, growth rate, ring density and flexural modulus of elasticity (MOE) of trees may change after CT. Moreover, mechanical wood properties vary with position in the tree, and there is a need to develop optimal log allocation strategies in order to allocate logs to their best use. 相似文献3.
François Courbet Jean-Christophe Hervé Etienne K. Klein Francis Colin 《Annals of Forest Science》2012,69(2):125-138
• Introduction
Branch size and branch status (dead or alive) are important characteristics closely related to tree growth and wood quality. The aim of this study was to design models for the diameter and status of branches in Atlas cedar (Cedrus atlantica Manetti). 相似文献4.
• Introduction
The interactive effects of water and nitrogen (N) on frost hardiness are not well known in broad-leaved trees. Furthermore, new environmental conditions may favour naturally generated hybrids between native and introduced tree species over native species. 相似文献5.
Drought and frost resistance of trees: a comparison of four species at different sites and altitudes
Katline Charra-Vaskou Guillaume Charrier Rémi Wortemann Barbara Beikircher Hervé Cochard Thierry Ameglio Stefan Mayr 《Annals of Forest Science》2012,69(3):325-333
Context
Drought and frost resistances are key factors for the survival and distribution of tree species. 相似文献6.
• Introduction
The wavelet-based functional approach was evaluated for modelling tree taper of jack pine (Pinus banksiana Lamb.) trees grown in the Canadian boreal forest region. 相似文献7.
• Introduction
Many studies deal with taxonomic diversity (TD) or estimation of functional traits of ectomycorrhizal communities. However, to our knowledge, none of them has ever tried to calculate the functional diversity (FD) of those communities, which is of critical importance for the diversity and reliability of nutrient supply to the tree. 相似文献8.
Stefan Fleck Inga Mölder Mascha Jacob Tobias Gebauer Hermann F. Jungkunst Christoph Leuschner 《Annals of Forest Science》2011,68(7):1173-1185
Introduction
Sight-based field measurements of tree crown projection area and canopy height are common praxis in forest science but difficult to validate. We quantified their measurement errors based on the virtual representation of an 11-species old-growth forest provided by high-resolution terrestrial LIDAR (light detection and ranging) measurements. 相似文献9.
Frida I. Piper 《Annals of Forest Science》2011,68(2):415-424
• Introduction
One current explanation for worldwide drought-induced tree mortality states that reduced photosynthesis and continued respiration lead to carbon depletion and eventually to carbon starvation. 相似文献10.
• Background
Tree breeders have been reluctant to include wood traits in tree improvement programs owing to logistic difficulties and the cost associated with the assessing the traits. 相似文献11.
Point process models for mixed sessile forest stands 总被引：1，自引：0，他引：1
Marie Ange Ngo Bieng Christian Ginisty François Goreaud 《Annals of Forest Science》2011,68(2):267-274
• Background
Growth modelling of complex stands calls for the use of spatially explicit single-tree models. Such models require spatially explicit tree locations as the initial state to run simulations. Given the cost of such data, virtual forest stands, where tree locations are simulated, are generally used as the initial state. 相似文献12.
Jaume Gort-Oromi Lauri Mehtätalo Heli Peltola Ane Zubizarreta-Gerendiain Pertti Pulkkinen Ari Venäläinen 《Annals of Forest Science》2011,68(7):1233-1243
• Introduction
The objective of this work was to study how spacing and genetic entry and/or origin group affect radial growth (ring width and cumulative diameter development) and ring density from pith to bark in Scots pine (Pinus sylvestris L.) and in what sense their annual variability could be explained by the climatic variables. The spacing trial was located in central Finland, with current stand density range of 2,000–4,000 trees per hectare. All the six genetic entries had Kanerva pine (plus tree S1101) as a father tree, whereas the mother tree represented Finnish plus trees from southern, central and northern Finland. 相似文献13.
Yuhui Weng Yill-Sung Park Marek J. Krasowski T. J. Mullin 《Annals of Forest Science》2011,68(1):129-138
• Introduction
Multi-varietal forestry (MVF) is the deployment of tested tree varieties in plantation forestry. Computer simulation using POPSIM Simulator identified optimal combination of numbers of families, varieties per family and ramets per variety (nf, nc and nr, respectively) yielding the largest genetic gain for a specific status number (NS) in a varietal test (VT) intended for MVF of conifers. 相似文献14.
• Context
Many tree breeding programmes rely entirely on clonal seed orchards as the link between breeding activities and forestry, and are thereby also exposed to yearly fluctuations in the orchard crops. 相似文献15.
Haruki Nakajima Atsushi Kume Megumi Ishida Tohru Ohmiya Nobuya Mizoue 《Annals of Forest Science》2011,68(8):1333-1340
• Context
In long-term forest monitoring, tree crown condition has been visually rated to diagnose tree vigor and forest condition. However, visual estimates are subjective. A semiautomatic image analysis system, called CROCO, was developed to estimate crown condition quantitatively. CROCO calculates a DSO value which decrease with increasing crown transparency. 相似文献16.
•Introduction
The agricultural landscape in Eastern Canada has drastically changed in the last decades. Whilst certain forest communities are disappearing, post-agricultural forests are emerging from old fields colonized by fast-growing tree species. 相似文献17.
Encarna Rodríguez-García Cristóbal Ordóñez Felipe Bravo 《Annals of Forest Science》2011,68(2):337-346
• Introduction
Shrubs are recognized as important tree regeneration niches. In this study, we experimentally analysed the effects of shrub presence, canopy cover (closed cover and open cover-gaps), and seedling size on Pinus pinaster growth. 相似文献18.
Philippe de Reffye MengZhen Kang Jing Hua Daniel Auclair 《Annals of Forest Science》2012,69(2):153-165
• Context
Modelling annual shoot development processes is a key step towards functional–structural modelling of trees. Various patterns of meristem activity can be distinguished in tree shoots, with active periods of phytomer production followed by rest periods. This approach has seldom been integrated in functional–structural tree models. 相似文献19.
• Introduction
Size-density relationships define the maximum number of stems that even-aged stands of a given species can hold in relation to the mean size of trees. They are used to derive stand density measures and are useful tools used to control tree mortality. 相似文献20.