共查询到20条相似文献，搜索用时 15 毫秒
1.
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2.
Limin Dai Lin Qi Qingwei Wang Dongkai Su Dapao Yu Yue Wang Yujing Ye Shengwei Jiang Wei Zhao 《Annals of Forest Science》2011,68(5):889-897
Introduction
Long-term ecological studies are essential for understanding the dynamics of natural systems. However, describing long-term dynamics in old-growth forests is often hindered by a lack of archival data. 相似文献3.
• Context
The roles of woody-plant islands are well documented in low-altitude regions, but research related to such shrub effects in high-altitude regions is scant. 相似文献4.
Nicolas Barbier Pierre Couteron Jean-Philippe Gastelly-Etchegorry Christophe Proisy 《Annals of Forest Science》2012,69(2):305-311
• Context
Remote sensing methods, and in particular very high (metric) resolution optical imagery, are essential assets to obtain forest structure data that cannot be measured from the ground because they are too difficult to measure or because the areas to sample are too large or inaccessible. 相似文献5.
Samuel Dufour-Kowalski Benoît Courbaud Philippe Dreyfus Céline Meredieu François de Coligny 《Annals of Forest Science》2012,69(2):221-233
Context
Forest scientists build models to simulate stand growth and forests dynamics. Dedicated computer tools are often developed to implement these models in order to run silvicultural scenarios and explore simulation results. 相似文献6.
Annett Wolf 《Annals of Forest Science》2011,68(3):485-495
Introduction
Trees in two compartments of the mixed deciduous forest Draved Forest have been monitored regularly for 50 years. 相似文献7.
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8.
Mikko Vehmas Petteri Packalén Matti Maltamo Kalle Eerikäinen 《Annals of Forest Science》2011,68(4):825-835
• Introduction
Canopy gap dynamics in old-growth boreal forests is a result of tree mortality caused by insects, diseases, or meteorological phenomena. Canopy gaps improve the possibilities of natural regeneration, and concentrations of decomposed deadwood are often found in these natural openings, which provide specific habitats for many deadwood-dependent species and organisms. 相似文献9.
Jean Trap Fabrice Bureau Marthe Akpa-Vinceslas Thibaud Decaens Michaël Aubert 《Annals of Forest Science》2011,68(3):595-606
Introduction
We investigated changes in humus morphology and soil potential net N mineralization pathways along a pure beech even-aged forest chronosequence, composed of four stages (15, 65, 95, and 130 years old) on Luvisol. 相似文献10.
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11.
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12.
Jeroen Staelens Lieven Nachtergale An De Schrijver Margot Vanhellemont Karen Wuyts Kris Verheyen 《Annals of Forest Science》2011,68(1):89-98
Introduction
To increase our understanding of litterfall dynamics in mixed-species forests, seasonal and annual variations in litterfall mass and nutrient concentrations were assessed for a 60-year-old spontaneously developed forest dominated by silver birch (Betula pendula Roth), pedunculate oak (Quercus robur L.), and northern red oak (Quercus rubra L.) in Belgium. 相似文献13.
Guillermo J. Martínez Pastur Pablo L. Peri Juan M. Cellini María V. Lencinas Marcelo Barrera Horacio Ivancich 《Annals of Forest Science》2011,68(3):587-594
•Introduction
Silviculture systems applied in Nothofagus pumilio forests are based on opening the canopy to stimulate natural regeneration by modifying light and soil moisture. The objective is to evaluate regeneration dynamics of N. pumilio along different forest canopy and solar radiation gradients. 相似文献14.
• Background
The data on carbon pool and biomass distribution pattern of old-growth Pinus kesiya Royle ex. Gordon forests are not available. 相似文献15.
David Da Silva Philippe Balandier Frédéric Boudon André Marquier Christophe Godin 《Annals of Forest Science》2012,69(2):181-193
• Context
Light availability in forest understory is essential for many processes; it is, therefore, a valuable information regarding forest management. However, its estimation is often difficult and direct measurements are tedious. Models can be used to compute understory light, but they often require a lot of field data to accurately predict light distribution, particularly in the case of heterogeneous canopies. 相似文献16.
Franck Richard Melanie Roy Oula Shahin Christopher Sthultz Myriam Duchemin Richard Joffre Marc-André Selosse 《Annals of Forest Science》2011,68(1):57-68
• Introduction
Millions of hectares of Quercus ilex forests dominate disturbed landscapes in the western part of the Mediterranean basin. Although these forests are very widespread, little is known about the composition and structure of their associated ectomycorrhizal fungal communities. 相似文献17.
Viviana Horna Bernhard Schuldt Sarah Brix Christoph Leuschner 《Annals of Forest Science》2011,68(5):1027-1038
• Introduction
We studied stem sap flux density in seven common tree species in a perhumid tropical rainforest at pre-montane elevation in Sulawesi with the aims (1) to analyse the among-species variation in flow patterns, (2) to search for an assumed convergence in the response to controlling environmental factors, and (3) to investigate the effect of tree size on xylem flux. 相似文献18.
• Introduction
The use of terrestrial LiDAR (light detection and ranging) scanners in forest environments is being studied extensively at present due to the high potential of this technology to acquire three-dimensional data on standing trees rapidly and accurately. This article aims to establish the state-of-the-art in this emerging area. 相似文献19.
Rasoul Yousefpour Jette Bredahl Jacobsen Bo Jellesmark Thorsen Henrik Meilby Marc Hanewinkel Karoline Oehler 《Annals of Forest Science》2012,69(1):1-15
• Context
This review paper provides an overview of approaches to which we may resort for handling the complex decision problems involving uncertainty and risk that climate change implies for forest managers. Modelling approaches that could support adaptive management strategies seem to be called for, not only as climate change denotes increased economic uncertainty but also because new and more reliable information becomes available as time passes and climate changes. 相似文献20.
Grégoire Vincent Jean-François Molino Lucile Marescot Karim Barkaoui Daniel Sabatier Vincent Freycon Jean Baptiste Roelens 《Annals of Forest Science》2011,68(2):357-370