Báo cáo lâm nghiệp: "The contribution of remote sensing to the assessment of drought effects in forest ecosystems" ppsx

... from the similarity of the detected changes with those caused by drought. This part gives an overview of the state of the art in the use of remote sensing for detecting and monitor- ing forest ... are: to briefly review the existing sources of remote sensing data and their potential to detect drought damage; to review the remote sensing applica...

Ngày tải lên: 07/08/2014, 16:20

... and tougher than the sum of the values of their parts (H, K 2005). At the end of the 70s and at the begin- ning of the 80s of the 20 th century, the principle of plywood allowed the ... F 2 40% of maximal loading, a 2 – a 1 – increase in the deflection of the sample at the point of load force (mm), adequate to loading increment (F...

Ngày tải lên: 07/08/2014, 04:20

... the specimen level (Fig. 2). e speci- men height has to correspond to requirements of a testing machine. If the testing machine does not allow to change the height of pivot points of holding ... e number of revolutions is recorded again. e initial point of abrasion occurs when: – the first disturbance of the printed picture is vis - ible in the printed dec...

Ngày tải lên: 07/08/2014, 10:21

... However, these did not group into a single cluster with the other accessions of this species that had their origin in China (T2, T3 and T4). Instead, they were placed in a cluster in which most of the ... Nankai University, Tianjin 300071, P.R. China b Laboratory of Cell Biology, The Research Institute of Forestry, The Chinese Academy of Forestry, Beijing 100091, P. R....

Ngày tải lên: 07/08/2014, 16:20

... However, in the case of longer time intervals, the number of species may decrease as phytocoenoses are in the initial stage of phytosociological relations (W 1987). Of all the inventoried ... availability of light to the under- growth. In both cases, the tree layer had a dominant share in trapping energy in the biomass. However, a marked increase in...

Ngày tải lên: 07/08/2014, 10:22

... and to the logging historical series [33]. This was done in order to identify the causal factor of these disturbances and to verify which of the logging that took place in the Buscaié and Prel forests ... history. There are two major limitations to using increment cores in age determination: the difficulty of intercepting the pith at the coring height, and t...

Ngày tải lên: 08/08/2014, 01:21

... harvesting options, to determine the yield of each option, and to inspect the impacts of forest management on the other values of the forest [38]. Growth and yield models can be classified into ... model for pine mixtures 15 increasing elevation increases the growth of a P. nigra tree. The signs of coefficients of the plot factor model of P. nigra were log...

Ngày tải lên: 08/08/2014, 01:22

... by increasing their resistance to cavitation [13], one of the major causes of decline in the botanical species in the absence of water [5]. In contrast, Acer species are more restricted to their ... respect to their spa- tial distribution in the French Alps. These species are distrib- uted along an ecological gradient from the moist alpine valleys to the drie...

Ngày tải lên: 08/08/2014, 01:22

... America’s Forests: Gateway To Opportunity. Pro- ceedings of the 1978 Joint Convention of the Society of American Foresters and the Canadian Institute of Forestry, Society of American ... RL (1981) Flood tolerance and related characteristics of trees of the bottomland forests of the southern United States. In: Wetlands of Bottomland...

Ngày tải lên: 08/08/2014, 18:21

... at the self-thinning limit (figure 3). The influence of site quality on the intercept of the self-thinning line was examined by adding the site index to the model as an independent variable. The ... (Eq. (2)). Due to the form of equation (2), the height of a tree with dominant diameter is equal to the dominant height of the stand. Furthermore, when the...

Ngày tải lên: 08/08/2014, 01:21