Báo cáo lâm nghiệp: "Local variations of ecosystem functions in Mediterranean evergreen oak woodland" ppsx

... stan- dard deviation of 48 g.m -2 . Interannual vari- Original article Local variations of ecosystem functions in Mediterranean evergreen oak woodland R Joffre S Rambal, F Romane Centre ... classes using a lag spacing of 1.8 m. Using these parameters, the number of pairs of points considered in each variogram lag class is indi- cated in...

Ngày tải lên: 08/08/2014, 18:21

... even shows an inverse trend, showing an increase of individuals with increasing height. 5. DISCUSSION The studied part of the Leyte Cordillera harbors at least 28% of the Philippine dipterocarp ... western side of the mountain range are actually typical species of the coastal plains which found their refuge in the rugged western foothills of Mt. Pangasugan. The dominant role o...

Ngày tải lên: 08/08/2014, 00:22

... growth in young Pinus radiata [28]. Therefore, thinning-induced root prolifer- ation would compensate for the initial decrease in root biomass, maintaining the contribution of root respiration during ... increased rooting space, will stim- ulate coarse root branching and elongation of the remaining trees, and fine root proliferation. Indeed, reduced competition for water after thinnin...

Ngày tải lên: 08/08/2014, 01:22

... Breeding Station of the Forestry Research Institute in Kostelec nad Černými lesy. Low pH and high levels of phytohormones can bear interesting results by cultures in vitro, especially in somatic ... 20 ml solution), in part reinforced by heating 6g of agar in a 1 l medium. Cultures were incubated for 6 weeks with a daily lighting period of 14 hours. After completion...

Ngày tải lên: 07/08/2014, 03:22

... (2000). An interesting method of studying the historical development of floodplain forests based on a combination of historical map analysis and the findings of a fossil mollusc in the area of the ... were issued in 1681 by the Prince Karl Eusebius of Liechtenstein for the Úsov dominion. An interesting clause con- cerning otter hunting can be found in the document – hunt...

Ngày tải lên: 07/08/2014, 10:21

... is now increasingly planted in Europe, both in afforestation of abandoned farmland and enrichment of forests [26]. In Gali- cia (NW Spain) a long term breeding program for this species was started in ... although it was suspected, since the infection of this disease occurs through stomata in early spring. Bud burst explained some of the variation in leaf spot incidence (17–...

Ngày tải lên: 07/08/2014, 16:20

... that of suberin (Fig. 4). Relatively large amounts of lignin were found in spruce fine roots where the thinnest rootlets (< 0.5 mm) contained similar amounts of suberin and lignin (about 1.5 ... suberin content of oak root cell walls. A low suberin content in Norway spruce roots coincided with a high drought sensitivity of this species in Central Europe [12]. Experimen- t...

Ngày tải lên: 08/08/2014, 01:21

... Percentage of nutrient remaining over time in decomposing fine roots of Chinese fir and Tsoong’s tree. Bars indicate standard error. Fine root decomposition in a mixed forest 71 For roots of the ... concentration, lignin content, ratio of lignin/N and ratio of lignin/P of the ini- tial material were the best predictors of mass loss for roots of the Chinese fir; and initial...

Ngày tải lên: 08/08/2014, 01:22

... in radial increments of old growth eastern redcedar to examine the chemical history of the environment. In: Proc of the Int Symp on Ecological Aspects of Tree-Ring Analysis, ... maple in Ver- mont. Vt Agr Exp Sta, RR 53, Univ Vt, Burlington, VA, USA, 9 p Original article Element analysis of tree rings in pedunculate oak heartwood: an i...

Ngày tải lên: 08/08/2014, 18:21

... L., Using d 13 C in tree rings as a bio-indicator of environmental variations and ecophysiological changes in tree functioning, in: Frenzel B. (Ed.), Problems of stable isotopes in tree-rings, ... pattern of d 13 C (figures 4, 5) consists mainly of a significant peak to less negative d 13 C values in late spring, while there are only minor variations in needle d 13 C...

Ngày tải lên: 08/08/2014, 01:21