Báo cáo lâm nghiệp: "Can understory vegetation accurately predict site index? A comparative study using floristic and abiotic indices in sessile oak (Quercus petraea Liebl ) stands in northern France" ppt
Báo cáo lâm nghiệp: "Can understory vegetation accurately predict site index? A comparative study using floristic and abiotic indices in sessile oak (Quercus petraea Liebl.) stands in northern France" ppt
... 31–42 © INRA, EDP Sciences, 2006 DOI: 10.1051/forest:2005091 Original article Can understory vegetation accurately predict site index? A comparative study using floristic and abiotic indices in sessile ... Mg/K) and floristic indices (CA Axis 1 and Axis 3) and was better than corresponding models with only abiotic or floristic indices (M5 an...
Ngày tải lên: 08/08/2014, 00:22
Báo cáo lâm nghiệp: "Canonical correspondence analysis for forest site classification. A case study* " ppt
... associated to the kth ordination axis: λ CA,1 ≥ λ CA,2 ≥ ≥ λ CA,k ≥ λCA,k + 1 ≥ The same quantities, ... et al (198 7) and Lebreton et al (198 8a) , CCA may be viewed: i) as a CA of P where the ordination axes are linearly con- strained by the environmental variable...
Ngày tải lên: 08/08/2014, 18:21
Báo cáo lâm nghiệp: "Can 13C stable isotope record of Norway spruce tree rings display the effect of environmental conditions" pot
... R., CATALAN J., 1994. Chemical composition of lakes in crystalline basins: A combination of atmospheric deposition, geological background, biological activity, and human action. In: MARGALEF ... cellulose and lignin of oak tree-rings. Palaeography, Palaeoclimatol- ogy, Palaeoecology, 196: 395–407. MA J.V., 2005. Plant root responses to three abundant soil minerals: silicon, alu...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Can we reconstruct deer browsing history and how? Lessons from Gaultheria shallon Pursh" pdf
... are also com- pared under a light table using either raw data or standardized series. Standardization allows emphasizing narrow rings and allows remov- ing non inter-annual variations [37]. In ... Tar Island) and 4 deer-affected islands (Reef Island, Ramsay Island, Burnaby Island and the south of Moresby Island) (Fig. 1). On each island we selected sites that had sufficient repr...
Ngày tải lên: 08/08/2014, 00:21
Báo cáo lâm nghiệp: " Silviculture-driven vegetation change in a European temperate deciduous forest" ppt
... including ( 1a) aging CWS stands (n = 1 0), which were located in parts of the forest which have escaped any manage- ment and remained unexploited since at least 50 years; (1b) postlogged CWS stands (n ... with a maximum of 200 iterations and 30 runs with ran- domized data. Axes of the DCA and NMS ordinations were compared by calculating pairwise Spearman rank correlation coef...
Ngày tải lên: 08/08/2014, 00:21
Báo cáo lâm nghiệp: "Can sales of infested timber be used to quantify attacks by Ips typographus (Coleoptera, Scolytidae)? A pilot study from Belgium" ppt
... 480 A. Franklin et al. as more trees are cut than are actually infested. The reliability of data could probably be improved if standard rules for record- ing infestations are established. ... evaluated using qualitative categories combined to a quantitative estimation of its commercial value (Tab. I). Only trees from the same species, quality and felling operation are put in the same...
Ngày tải lên: 08/08/2014, 01:22
Báo cáo lâm nghiệp: "The effect of point application of fertilizers on the soil environment of spread line windrows in the Krušné hory Mts" docx
... ac- cording to characteristic absorbances in pyrophos- phate. Carbon contained in humic acids (hereinafter C-HA) and carbon contained in fulvic acids (herein- after C-FA) were detected. Based on ... easily available to plants. Unexchangeable K is de- fined by 3 fractions (K bound in the crystal lattice of silicates, fixed into clay minerals and organic K) that are hardly availab...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Improving RBS estimates – effects of the auxiliary variable, stratification of the crown, and deletion of segments on the precision of estimate" pps
... complete crown data were used: Norway spruce (Picea abies [L.] Karst .), European mountain ash (Sorbus aucuparia L .) and Monterey pine (Pinus radiata D. Don). e results clearly indicate that the choice ... (European mountain ash) and 80% (old pine) compared with that for unstratified trees. For three strata, the decrease varied between 50% (European mountain ash) and 85% (old p...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Earthworms (Lumbricidae) of an air-polluted area affected by ameliorative liming" pdf
... individuals·m –2 ). On the other hand, abundance in FTG 7K increases and culminates in D. octaedra (15.1 individuals·m –2 ) and A. rosea (4.6 individuals·m –2 ). e altitudi- nal gradient, which was not ... growing season 115–130 days and natural species composi- tion Fagus sylvatica L., Abies alba Mill. and Picea abies (L .) Karst. Fageto-Piceetum acidophilum (7...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: "Nutrition of silver fir (Abies alba Mill) growing at the upper limit of its occurrence in the Šumava National Park and Protected Landscape Area" pot
... (200 4). e mean value measured in the sampled locality in Germa- ny was 63 mg·kg –1 ; for the localities in Poland and Slovakia it was 30 and 39 mg·kg –1 , respectively. e average value measured ... altitudes exceeding 1,100 m a. s.l. In the southern part, sampling was done at altitudes above 1,200 m a. s.l. Forest stands of the 7 th (spruce- beech) and 8 th (spru...
Ngày tải lên: 07/08/2014, 10:21