Báo cáo lâm nghiệp: "Solar activity, global surface air temperature anomaly and pacific decadal oscillation recorded in urban tree rings" pot

... especially in the 2–4 years band width. urban tree rings / sunspot number / Pacific decadal oscillation / global surface air temperature anomaly / wavelet analysis Résumé – Impact de l’activité solaire, ... Sun Y., Tao D.L. Solar activity, global surface air temperature anomaly and pacific decadal oscillation signals observed in urban outskirts tre...

Ngày tải lên: 07/08/2014, 16:21

... Cephal- cia species in the Czech Republic, the goals of this study were (i) to monitor web-spinning sawflies liv- ing on spruce in mountainous regions and (ii) to compare species composition and abundances ... and traps were operated in both forest types in parallel (Table 1). e traps were installed from the end of April to the end of October and emptied in two-week or...

Ngày tải lên: 07/08/2014, 03:22

... spruce trees growing in waterlogged and in well-drained sites. He found out that the mean value of root plate depth was 45 cm in spruce trees growing in poorly drained sites and 100 cm in the trees ... of W rp was 500 cm in trees growing in wa- terlogged sites, but it was only 419 cm in Norway spruce trees growing in well-drained sites. Inter- estingly, on the other...

Ngày tải lên: 07/08/2014, 10:22

... at the end of May and beginning of June in 2005. In 2006, the flight activity started later in mid-May and lasted to the beginning of July but was interrupted by cold and rainy weather. At higher ... higher. In the Nízký Jeseník Hills, the flight activity started at the beginning of May and ended in mid-June with the peak at the end of May and beginning of June in 2005...

Ngày tải lên: 07/08/2014, 03:22

... CO 2 concentration will induce higher photosyn- thetic rates in herbaceous C3 plants and also in trees (Ceulemans and Mousseau, 1994). However, initial increases in photo- synthesis ... are sometimes not maintained during long-term exposure to elevated CO 2, namely in studies with potted trees (Ceule- mans and Mousseau, 1994; Gunderson and Wull...

Ngày tải lên: 08/08/2014, 18:21

... Several cytokinins, including zeatin and zeatin riboside, were detected in seedling leaves. Discussion and Conclusion These results demonstrate the presence of cytokinins in leaves ... increased cytokinin activity in leaves of C. jambhiri. Colonization by G. fasciculatum and G. mosseae resulted in a significant increase in seedling leaf cytokini...

Ngày tải lên: 09/08/2014, 04:20

... are usually low. Infested logs were brought to the laboratory and put into the light boxes. e hatched and emerged indi- viduals were captured daily in plastic jars and kept in refrigerator. ... Because of possible problems concerning the rearing of irradiated individuals, the rearing was done in large numbers of individuals and each dose was carried out in five replicatio...

Ngày tải lên: 07/08/2014, 03:22

... primarily. After the air pollution induced decay of forest stands in the mountain regions of the Czech Re- public in 1970s to 1990s, there was a problem of autochthonous tree species planting failure ... used tree species after air pollution damage to forest stands in moun- tain regions of the Czech Republic. Reference s BALCAR V., KACÁLEK D., 2008. European beech planted in...

Ngày tải lên: 07/08/2014, 03:22

... containing 10–20% of silt and clay (medium sands – light and strong), c – hea- vy formations containing over 20% of silt and clay. e following properties were determined in soil samples (in ... sands, and 12.7% of loams. In 30% of the studied plots the horizon II Can was also identified, which was made up of loams in 52.9%, of loose and coarse sands in 29.4%, and of...

Ngày tải lên: 07/08/2014, 03:22

... abies), and Carpathian pine (Pinus mugo Turra). VTs were named according to these tree species because of their dominance in certain zones. Some other tree species also occur in particular VTs and ... co-dominant tree level. Carpinus betulus is represented regularly only in the overtopped tree level. Tilia cordata, Tilia platyphyl- los, and Fraxinus excelsior occur...

Ngày tải lên: 07/08/2014, 04:20