Báo cáo lâm nghiệp: "Predicting the potential distribution of Sirex noctilio (Hymenoptera: Siricidae), a significant exotic pest of Pinus plantations" pot

... susceptible hosts are located within the shaded area (Jianghua Sun, 2004, unpublished data). 126 A. J. Carnegie et al. There are large areas of forests of P. massoniana in the south-east of China and of Larix ... 10.1051/forest:2005104 Original article Predicting the potential distribution of Sirex noctilio (Hymenoptera: Siricidae), a significant exotic p...

Ngày tải lên: 08/08/2014, 00:22

... autumn approached. These periodic variations are the consequence of the balance maintained between the rate of periclinal cambial cell divisions and the rate of differentia- tion of the cells as ... statistically satisfy both the activation and the deactivation of a cell production process. The two states of the cambium (active and inactive or dor- mant) may al...

Ngày tải lên: 08/08/2014, 00:22

... Conversely, the branches are the next place of transport and allocation of assimilates, just after the leaves. Simulating the spatial distribution of branches using architectural models provides detailed ... particular, the great ex- tent of the neoformed zone 3 in the annual shoots of the main stem expresses the adaptive potential of Atlas cedar to vary- ing...

Ngày tải lên: 07/08/2014, 16:21

... fires are the most important cause of damage to the natural environ- ment in the Mediterranean basin [51]. Amongst the countries of the Mediterranean basin, Spain is one of those with a rela- tively ... can be considered as colonisers are Halimium alyssoides and Halimium umbellatum. These species used germina- tion as a regeneration mechanism and both of them take advant...

Ngày tải lên: 08/08/2014, 01:21

... medians and quartiles (data did not fit nor- mality). At this step of the analysis, only the sapling dataset was included because the potential of seedlings is uncertain for forestry. Plot data ... pseudoplatanus were negatively correlated with the two distance measures (Tab. II) on the whole. The distance to the nearest alluvial forest had a greater explaining power tha...

Ngày tải lên: 08/08/2014, 01:22

... shows a method to estimate the sustainable har- vest rates and the stable diameter distributions of three qual- ities of Fagus Sylvatica L. in the managed pure uneven-aged stands of Navarre (Spain), ... this paper is to estimate the long-term sustainable harvest rates and the stable diameter distributions of uneven-aged managed beech (Fagus Sylvatica L.) stands in Navarre...

Ngày tải lên: 07/08/2014, 16:21

... range. Figure 5a shows that models 2 and 3 sensitivity against b max values is maximal for age = age max at the same basal area. It increases with increasing basal area, but with a lower rate ... by aver- aging values measured by the two instruments. Stand solar radiation transmittance T was calculated as the ratio of daily transmitted solar irradiation to daily incident solar irr...

Ngày tải lên: 08/08/2014, 01:22

... Entomology, 23: 99–108. Table 3. Results of the redundancy analysis of explanatory variables, their significance and correlations with the axes Explanatory variable AX1 AX2 AX3 AX4 P F I. F. 2002 –0.4737 ... 1 and Table 3. e first canonical axis explains 38.8% of variability, both canonical axes explain 53% of variability (Table 2). All axes explain 100% of vari- ability. e wh...

Ngày tải lên: 07/08/2014, 03:22

... the variance estimators as well as the “true” variances (7) and (8) calculated. All means and variances were averaged over the k systematic or random samples. Sample sizes n vary among the ... on the irregularity of the particular shape of the area. With poststratification there is an additional variability of sample sizes within strata (V 1993). A well-known...

Ngày tải lên: 07/08/2014, 03:22

... average annual precipitation amount of 560 mm and mean annual temperature of 9.3°C (1951 to 2003). e substrate (mainly sands and loamy sands) at the study site was dumped and amelio- rated ... fertilizer was added at the beginning, P and K were added after each harvest; short rotation areas were limed after 12 years. For conventional agriculture and ACS the same crop rotat...

Ngày tải lên: 07/08/2014, 10:21