What factors influence the stem taper of <Emphasis Type="Italic">Eucalyptus</Emphasis>: growth,environmental conditions,or genetics?     

Hugues Yvan Gomat  Philippe Deleporte  Régis Moukini  Gladys Mialounguila  Nina Ognouabi  Aubin Rachel Saya  Philippe Vigneron  Laurent Saint-Andre 《Annals of Forest Science》2011,68(1):109-120

• Introduction   

Stem taper equations have been widely used for volume estimation to varied top diameter limits or for biomass calculations. However, their main drawback is that specific calibration is often necessary for each species or clone, and accounting for genetic and environmental effects is often a challenge.  相似文献   

Embolism induced by winter drought may be critical for the survival of <Emphasis Type="Italic">Pinus sylvestris</Emphasis> L. near its southern distribution limit     

José Javier Peguero-Pina  José María Alquézar-Alquézar  Stefan Mayr  Hervé Cochard  Eustaquio Gil-Pelegrín 《Annals of Forest Science》2011,68(3):565-574

Introduction   

Scots pine populations in the SE “Sistema Ibérico” range suffered a severe defoliation in the S face of the crown in isolated trees of thinned stands. This process was detected at the end of the winter 2001–2002.  相似文献   

Distribution and plant community associations of the understory bamboo <Emphasis Type="Italic">Fargesia qinlingensis</Emphasis> in the Foping National Nature Reserve,China     

Xi-Chun Du  Yi Ren  Gao-Di Dang  Jeremy Lundholm 《Annals of Forest Science》2011,68(7):1197-1206

• Introduction  

Fargesia qinlingensis is the primary food source for the endangered giant panda during the summer months in the Qinling Mountains, but little is known about its spatial distribution and plant community associations.  相似文献   

Using airborne laser scanning data for detecting canopy gaps and their understory type in mature boreal forest     

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   

Diversity in phosphorus mobilisation and uptake in ectomycorrhizal fungi     

Claude Plassard  Julien Louche  Muhammad A. Ali  Myriam Duchemin  Elvira Legname  Benoît Cloutier-Hurteau 《Annals of Forest Science》2011,68(1):33-43

• Introduction   

Phosphorus (P) is often the first or second element limiting aboveground net primary productivity of forests. Besides low available inorganic orthophosphate (Pi) concentrations, soil may contain high total P contents, as insoluble mineral P or as organic P. Most plants form mycorrhizal associations that improve their P nutrition. Three main hypotheses have been proposed to explain this positive effect through an increase of (1) P mobilisation from mineral P, (2) P mobilisation from organic P and (3) soil exploration and P uptake. However, the positive effect of mycorrhizal symbiosis may be variable with the fungal species forming the association. This could be due to the different abilities of mycorrhizal fungi to mobilise P and/or to take up Pi from the soil.  相似文献   

Variant allometric scaling relationships between bud size and secondary shoot growth in <Emphasis Type="Italic">Quercus faginea</Emphasis>: implications for the climatic modulation of canopy growth     

Arben Q. Alla  J. Julio Camarero  Pilar Rivera  Gabriel Montserrat-Martí 《Annals of Forest Science》2011,68(7):1245-1254

• Introduction and statement of the research questions  

The relationships between primary and secondary growth in tree populations of contrasting climates are poorly understood. We tested the hypotheses that bud size and stem cross-sectional area are related through allometric relationship in shoots and that their scaling slopes change in response to climatic stress.  相似文献   

Boreal trees in the Mediterranean: recruitment of downy birch (<Emphasis Type="Italic">Betula alba</Emphasis>) at its southern range limit     

Rubén Sanz  Fernando Pulido  J. Julio Camarero 《Annals of Forest Science》2011,68(4):793-802

Objective  

Knowledge of mechanisms determining plant persistence in range edges is essential because peripheral populations face increasing risk and they often maintain unique genotypes.  相似文献   

Trade-off between height growth and spring flushing in common beech (<Emphasis Type="Italic">Fagus sylvatica</Emphasis> L.)     

Dušan Gömöry  Ladislav Paule 《Annals of Forest Science》2011,68(5):975-984

• Introduction   

The annual development cycle of boreal and temperate trees results from an evolutionary trade-off between two opposing forces. These are namely, the adjustment of leaf phenology to the timing of frost occurrence at the beginning and/or the end of the growth season countered by an effective adjustment to the duration of the growth season to maximise photosynthesis and biomass production during the growing season.  相似文献   

Estimating balanced structure areas in multi-species forests on the Sierra Madre Occidental,Mexico   总被引：1，自引：0，他引：1  

Christian Wehenkel  José Javier Corral-Rivas  José Ciro Hernández-Díaz  Klaus von Gadow 《Annals of Forest Science》2011,68(2):385-394

• Introduction   

This study presents a method for estimating the minimum area which exhibits a balanced diameter distribution, and the corresponding number of trees, for different tree species and forest types in the Santiago Papasquiaro region in the State of Durango, Mexico. The balanced structure area is defined as the minimum contiguous area that is required for sustainable management of a multi-sized selection forest. A multi-sized forest represents a balanced structure unit if the relationship between harvest and growth can be maintained, using a defined target diameter distribution and disregarding major natural disturbances. The study is based on 17,577 sample plots in uneven-aged forests, which are selectively harvested by local communities.  相似文献   

Breakdown and macroinvertebrate colonization of needle and leaf litter in conifer plantation streams in Shikoku,southwestern Japan     

Mayu Hisabae  Shin Sone  Mikio Inoue 《Journal of Forest Research》2011,16(2):108-115

Breakdown and macroinvertebrate colonization of conifer needles (Cryptomeria japonica) and deciduous broadleaves (Euptelea polyandra) were investigated using litter bags in two study sites in streams flowing through a conifer plantation of C. japonica in Shikoku, southwestern Japan (one site with conifer canopy and another with mixed conifer and broadleaved canopy). Breakdown rates and macroinvertebrate densities were compared between litter species (conifer needle vs broadleaf) and between the two sites (conifer vs mixed canopy) to determine (1) whether breakdown rate of broadleaves is higher than conifer needles, (2) whether macroinvertebrates prefer broadleaves to conifer needles, and (3) whether the difference in riparian canopy is reflected in macroinvertebrate abundance. The results indicated that breakdown rates of broadleaves were higher than those of conifer needles, suggesting poorer quality of the latter as food for macroinvertebrates. Differences in macroinvertebrate density between needles and broadleaves were generally consistent with those in breakdown rates: broadleaves tended to have higher densities than needles, suggesting that conifer needles were not preferred by macroinvertebrates. However, total macroinvertebrate density in the conifer site was not significantly different from that in the mixed site, although the dominant shredder taxon differed (conifer site: gammarids; mixed site: lepidostomatids). Although conifer needles are low-quality food for macroinvertebrates, this may offer some advantages. Conifer needles remain on the streambed for longer periods owing to their lower breakdown rates, being a constantly available resource. In addition, accumulations of conifer litter may effectively trap and retain particulate organic matter.  相似文献