Forty years of rain forest ecology 1948-1988 in perspective
The main fields of research in tropical rain forest ecology today are briefly described and the development of the subject over the past forty years is outlined.
Litter production and mineral element input to the forest floor in a central amazonian forest
The study investigates the seasonal and element patterns of litterfall at two particular sites of terra firme forest in the central Amazon. The input of elements such as C, N, P, S, K, Ca, Mg, Na, Zn, Fe, Al, Mn, B and Cu was thoroughly evaluated
Classification of small-scale forests in Flanders using Landsat TM digital data : preliminary results in Monitoring the Earth's environment.
The second-generation earth observation satellites of the Landsat programme carry the Thematic Mapper sensor with improved spatial and spectral resolution. The feasibility of the Thematic Mapper for forest classification in Flanders is investigated
. Due to the unfortunate recording time of the available test image (1 November), the described results have to be considered as provisional. Two test zones, representative of the small-scale forest situation in Flanders, are selected as study sites
. A supervised classification scheme is adopted, with special emphasis on the assessment of classification accuracy on different levels of detail : forest/non-forest, coniferous/deciduous, species and age classes. - (Authors).
The spatial variability of amazonian soils under natural forest and pasture
Spatial variability of physical and chemical properties in Amazonian soils is evaluated on sites of natural rain forest and pastures of different age in the Amazon region. The sampling scheme was regionalized using transects of fifty 3 m apart each
Particulate and dissolved losses of nitrogen and phosphorus from forest and agricultural soils
Peu d'études font la distinction entre la forme dissoute ou en particules de ces nutriments pendant leur transport dans des bassins-versants forestés. Des expérimentations montrent une différence de résultats qui peut s'expliquer par des sols
Discussion of the Jari plantation, which is one of the largest conversions of tropical forest to pulp plantation. Evaluation of soil fertility, productivity and profitability.
In january 1983, 20 alluvial fans in the forested Cascade foothills experienced net aggradation in response to debris torrents and stream floods triggered by intense warm rains falling on antecedent snow. One trench revealed residues of 7 events
Studies of soil movement have been carried out in the Sudetes Mts. for nearly 30 years, mainly by means of wooden pegs (columns). Three hypsometric-climatic zones were distinguished : low meadows, up to a height of 800 m, old forest at 800-1 200 m
The AA. compare the results of isotopic analyses of modern herbivore bones that were collected along an altitude cline in grassland, bush and montane forest environments in the Naivasha Basin of the central Rift Valley, to those of teeth from
In the forest of Enkheim, the depositional sequence of a river Main floodplain sediment was analyzed with regard to the elemental composition of its sediment-facies using XRD- and XRF-techniques. The study includes residual minerals, detrital
cours d'eau et l'altitude. La surface du bassin-versant, le pourcentage de surface forestée, la densité de drainage, les précipitations à la saison sèche et la pente des cours d'eau déterminent le débit annuel et sont utilisés dans sa prévision.
Analyse d'une tourbière, à l'est de Bujumbura, au pied du mont Manga (2 600 m). Après une période aride culminant entre 18 000 et 14 000 BP, période humide et plus chaude de 10 000 à 5 000 BP pendant laquelle la rain forest, qui s'était réfugiée