Báo cáo lâm nghiệp: "Which factors explain lepidopteran larvae variance in seasonal guilds on some oaks" pptx

... species across seasons. Our effort was focused on understanding the mechanisms that explain variance in lepidopteran communities in various seasonal guilds on different oaks. e main study goal ... the main life-history traits of lepidopteran larvae and other parameters that may explain species variance in seasonal guilds on different oak species via clus...

Ngày tải lên: 07/08/2014, 10:21

... additional factors affecting empty seed production. In addition to the lack of pollination, other pre-zygotic events are known to influence mating success. These include pollination with non-viable ... degeneration is permanently high fol- lowing consanguineous mating, should be eliminated. Such consistent selection might contribute to a significant increase in vital seed proportion and...

Ngày tải lên: 08/08/2014, 00:21

... streams from the proportion originating from rain [24]. This calculation illustrates a range of rain contribu- tion to stream concentrations: 7 to 70% of stream Ca concen- trations (average 31%), 3 ... ele- ments in rain is negatively correlated to annual rainfall and their concentration by evapotranspiration decreases when an- nual precipitation increases. These two factors explain the...

Ngày tải lên: 08/08/2014, 00:22

... common garden con- ditions allows us a means of teasing out the factors that have contributed to the loss of one parental species and therefore gain a stronger insight into ... macrocarpa and Q turbinella from summer-dry habitats. Instead it appears that reliance on summer monsoon events is one of the critical factors influencing loss of...

Ngày tải lên: 08/08/2014, 18:21

... by an individual collecting of adults. During sweeping and beating, 30 sweepings or beatings were carried out in each locality. Caught psocids were sucked into the exhauster and stored in a ... species dispersion. is unit remains without change in various parts of axes. e DCA ordination method has a quite heuristic character. Interpretation of axes and ordination positions of p...

Ngày tải lên: 07/08/2014, 03:22

... 0.06 N concentration in mineral topsoil (%) N concentration in the cur.yr. needles, (%) in 2002 in 2004 Lineární (in 2002) Lineární (in 2004) Fig. 5. Correlations of N concentrations in the ... concentration in soil solution (mg L/1) N concentration in the cur.yr. Needles (%) 20 cm depth 50 cm depth Lineární (20 cm depth) Lineární (50 cm depth) Fig. 6. Correlations of N conc...

Ngày tải lên: 07/08/2014, 03:22

... evident that the functioning of the individual ecosystems must be understood in the context of their interactions. Nothing in the living environ- ment operates separately. e individual compo- nents ... show some dis- tinct differences in the precipitation activity between Table 1. Amounts of lysimetric percolation and precipitation depth (in mm) Partial plots Control plot Clear fe...

Ngày tải lên: 07/08/2014, 03:22

... hazard zones and spruce stand proportions within the zones in the Low Tatras region Zone Zone area (ha) Proportion in total area of the region (%) Proportion of spruce stands (ha) Proportion of ... region Fig. 3. Biotic hazard zones in the Orava region Table 3. e areas of biotic hazard zones and spruce stand proportions within the zones in the Orava region Zone Zone area (ha) P...

Ngày tải lên: 07/08/2014, 03:22

... smallest among stands of the Pieniny Mountains, but in spite of the growing up stage, it was similar to increments in other Carpathian stands as well as in some sample plots in Badin, Dobročský ... with increment of managed forests of identical species composition and site conditions. Generally, in natural and primeval forests, stands being in the growing up stage reach th...

Ngày tải lên: 07/08/2014, 03:22

... preserving only variability within the individual plots in time. e projection of variability in the woody synu- sia onto the herb synusia was done through relevé scores on 4 ordination axes ... pannonicae-Ulmetum carpinetosum (Simon 1957) Džatko 1972. Only in damp hollows, the plant communities incline to the sub-association Fraxineto pannonicae-Ulmetum caricetosum Soó in Aszó...

Ngày tải lên: 07/08/2014, 03:22