Báo cáo lâm nghiệp: " Silviculture-driven vegetation change in a European temperate deciduous forest" ppt

... 10.1051/forest:2005026 Original article Silviculture-driven vegetation change in a European temperate deciduous forest Guillaume DECOCQ a *, Michaël AUBERT b , Frédéric DUPONT c , Jacques BARDAT a , Annie WATTEZ-FRANGER a , ... Braun-Blanquet scale [9]. Nomenclature follows Lambinon et al. [40]. Total cover per layer was estimated as a percentage of the total plot are...

Ngày tải lên: 08/08/2014, 00:21

... decreased C concentration in the 0–15 cm depth from an initial value of 2.7% to 1.9%, 3 years after replanting a Pinus radiata plantation, in South Australia. C concentrations in the mineral layer ... the amount of litterfall increased [31]. A linear accumulation of organic matter with stand age in the forest floor (O L and O F+H layers) was found in slash pine plantations in...

Ngày tải lên: 08/08/2014, 00:22

... soil exchangeable pool. In acid soils with low amounts of Ca-bearing minerals as in the present site [12], since no secondary Ca-minerals are stable, released Ca is absorbed by vegetation or temporarily fixed ... total litterfall in the Douglas-fir stands. 478 J. Ranger et al. stands, and during 6 years in the 60-year-old stand clear-cut in Autumn 1998) i.e. stand age, seaso...

Ngày tải lên: 08/08/2014, 01:21

... bal- samea). Can J Bot 59, 1285-1291 Neale DB, Adams WT (1985) Allozyme and mating- system variation in balsam fir (Abies balsamea) across a continuous elevational transect. ... 1989); A lasiocarpa, tm = 0.89 (Shea, 1987); A balsamea, tm = 0.89 (Neale and Adams, 1985). This is in good concordance with phenological and biological observations...

Ngày tải lên: 08/08/2014, 18:21

... acoustic transmission. On the same plants, the transpiration rate was measured gra- vimetrically and stomatal conductance was measured using a porometer. Leaf area of each plant ... of stress; after that, the abovementioned parameters were measured again on August 25 (Fig. 1 c). The physiological data show that water stress was greater than before...

Ngày tải lên: 09/08/2014, 04:20

... than providing a detailed evaluation of the whole prov- enance experiment. MATERIALS AND METHODS Data sets In 1995, the Saxon Forest Research Institute in Graupa, Germany, initiated a large international ... agricultural variety crop trials, one can assume that spatial variation plays a significant role in the whole system. D et al. (2002) advocate an initial combined...

Ngày tải lên: 07/08/2014, 03:22

... ecological, social and economic drivers determining their political relevance, and transparency in negotiations and decision making are the necessary ingredients in managing renewable natural ... over increasingly large areas. In regions where oak and beech forests dominated, the coppice-with-standards system was a typical example of systematic management on a large scale. i...

Ngày tải lên: 07/08/2014, 03:22

... Tiliaceae 3.38 12.48 Quercus mongolica Fagaceae 2.10 7.75 Acer mono Aceraceae 1.98 7.31 Salix matsudana Salicaceae 1.36 5.01 Populus davidiana Salicaceae 1.31 4.84 Abies nephrolepis Pinaceae 1.17 ... species Family Basal area (m 2 ha –1 ) (%) PF Pinus koraiensis Pinaceae 15.26 40.11 Tilia amurensis Tiliaceae 6.62 17.40 Fraxinus mandshurica Oleaceae 4.49 11.80 Quercus mongolica Fagaceae 3.21...

Ngày tải lên: 07/08/2014, 03:22

... 105 and 140 years old. During the following updates in the forest management plan, little was changed in the already set principles and the floodplain forest was managed in the form of a composite ... coppice and softwood. In the floodplain near Horka nad Moravou with an area of 207 ha, the upper stand- ard layer covered half the area. Stand groups with oak up to 400 years of a...

Ngày tải lên: 07/08/2014, 03:22

... obtain objective data on the actual abundance of free-living animals in a certain area. Methods of direct counting are hardly utiliz- able in forest areas (B, P 1981). In our research, ... defeca- tion rates, which are diff erent in particular seasons and in each individual (M et al. 1985).  e accuracy of both methods is also markedly af- fected by the number...

Ngày tải lên: 07/08/2014, 10:21