Báo cáo lâm nghiệp: "Can we reconstruct deer browsing history and how? Lessons from Gaultheria shallon Pursh" pdf

... place on 4 deer- free islands (Low Island, South-Low Island, Lost Island and Tar Island) and 4 deer- affected islands (Reef Island, Ramsay Island, Burnaby Island and the south of Moresby Island) (Fig. ... the four deer- free islands (Lost, Low and Tar Islands) and from all four of the deer- affected islands (Reef Island, Ramsay Island, Burnaby Island and south of Moresby Isl...

Ngày tải lên: 08/08/2014, 00:21

... Saint-Andrieux et al. [48]: 0–9 cm seedlings, browsed by Roe deer and often up-rooted; 10–30 cm seedlings, foraged by both Roe and Red deer; 31–70 cm, seedlings browsed mainly by Red deer; and ... characterictics, with data from Site 1 (i.e. unaffected by deer browsing) , for comparison with Site 2 (i.e. affected by deer browsing) . For that purpose, data from each site we...

Ngày tải lên: 08/08/2014, 00:21

... L.). e land use history of the catchment suggests important timber harvesting and charcoal and potash production from the Middle Ages to the late 19 th century (V 1994). Sampling and analyses We ... damage. Trees were sampled from near breast height (cores from two opposite exposures). Rings were sectioned by decades and analyzed for the iso- topic composition. O...

Ngày tải lên: 07/08/2014, 03:22

... data were collected between the 23rd and the 27th of July 1995 in the East, and between the 4th and the 20th of June 1996 in the West and plant nomenclature followed Rameau [46]. East and West ... territory. The relationships between site index and (1) understory vegetation or (2) soil, topography and climate were studied using data from 99 even-aged high-forest stands located...

Ngày tải lên: 08/08/2014, 00:22

... identifying and recording attacks by I. typographus, (b) the strategy developed for marking and felling the attacked trees and (c) the delays that occurred between the identification of attacks and the ... throughout the district between June 1997 and March 2000. Comparisons checked for the presence and localisation of infested trees, their number and the year or flight season t...

Ngày tải lên: 08/08/2014, 01:22

... trees from the second and the third row (11.1 and 8.8 m). On the other hand, the h/d ratio and height were not significantly influenced by tree position within this variant. Comparison between ... with the group of trees from the second and the third row (h/d ratio 0.87 and 0.83, crown length 10.1 and 9.5 m). e other variables (height and symmetry of stem) were not sig...

Ngày tải lên: 07/08/2014, 03:22

... ere were statistically significant differ- ences between all rings in all zones. No statistically significant differences in the remaining zones (OW, SWL and SWR) were found near the pith and in ... for the CW, OW and SWL zones. An inverted trend was found only for the SWR zone. e inverted trend might have been caused by missing values from lower stem heights. P and K...

Ngày tải lên: 07/08/2014, 04:20

... abundance from mature stands were not however signifi cant (P > 0.05; t-test).  us, both species showed quite diff erent fl uctuations of population dynamics at sites of full-grown stands (P1–P5) ... However, using Duncan’s post-hoc test, a statis- tically signifi cant diff erence was calculated even be- tween the planting and the forest reserve (P = 0.042) as well as between the plan...

Ngày tải lên: 07/08/2014, 10:21

... highest values were re- corded on Troubky plot.  e results from the plots Malenovice and Netolice were relatively very close (in most cases they were not statistically signifi cant and lower than ... val- ues of height and breast-height diameter and diff er signifi cantly from the results obtained on the other plots. Table 9. Mean, minimal and maximal provenance tree height...

Ngày tải lên: 07/08/2014, 10:21

... indicators were compared to annual average (using absolute differences and relative seasonal indexes). e results showed that GE and GC of short-term stored seeds were 59% and 92%, and 35% and 81% ... right-skewed, kurtosed, and piked (values A are negative and E is about 1.0). Full correspond - ence was found between germination capacity in the first and second year of testi...

Ngày tải lên: 07/08/2014, 10:21