Analyse comparée de six indices différents (TBI, FBI, BMWP, ASPT, BBI, EPT) sue neuf sites dans le bassin de la Bérézina sur le territoire de la réserve de Bérézinski (République Belarusse).
Dynamique des clairières d'une forêt inexploitée (réserves biologiques de la forêt de Fontainebleau) I. Origine et état actuel des ouvertures. (Dynamics of gaps in unexploited forest (biologicalreserves of the Fontainebleau forest). I. Origin
Les ouvertures par mort d'arbres, qui constituent une phase d'importance capitale de la dynamique de forêts inexploitées, ont fait l'objet d'une analyse dans deux réserves intégrales de la forêt de Fontainebleau. Leurs causes et leur répartition
Généralisation de résultats d'inventaires sur l'état de communautés de lichens épiphytes - indicateurs biologiques de la pollution de l'air. Ces enquêtes ont été réalisées entre 1978 et 2001 avec un réseau de territoires standards (15 réserves
Etude des données bibliographiques pour 3 facteurs de productivité: réserves de phytomasse, masse morte et production annuelle pour tous les écosystèmes de Sibérie. Les données sont classées selon la division du territoire en zones thermiques et en
Use of satellite images in mapping of biological diversity in Senegal
The aim of the project is to develop a method for mapping and monitoring of biological diversity in the Sahel zone. Sahel is undergoing marked environmental changes, affecting not only human populations but also ecological communities. These ongoing
processes have biological implications on both national and international levels. The Sahelian biotopes hold a number of endemic biological assets and constitute the main wintering ground for a significant number of Palearctic migratory bird species.
Biodiversité ; Colonisation végétale ; Côte d'Ivoire ; Développement durable ; Infiltration ; Lamto Reserve ; Propriétés du sol ; Savane ; Savane humide ; Sol
This study was designed to assess changes in soil physical, chemical and biological properties after the establishment of C. odorata fallows in humid savannahs of Ivory Coast. Sampling sites were selected such that a portion of C. odorata fallow
in density and biomass. These results suggest that there are merits for the integration of C. odorata fallow in a cropping system for sustainable food production in the buffer zone of Lamto Reserve.
Palaeoecological evidence for environmental change during the last 200 years. I. Biological data
This paper reviews the role of biological data for assessing ecosystem change during the last 200 years, with examples from North America and Europe where most of this research, has to date, been concentrated.
A karszt biologiai produktum. (Karsts are biological products)
science has unambiguously demonstrated that most of the karst phenomena on the surface of the Earth reflect the effect of the activity of the biological world. (CK).
Charakteristik der chemischen und biologischen Ozeanologie der Ostsee. (Characterization of chemical and biological oceanology of the Baltic Sea)
the seasonal changes of the chemical and biological conditions in the surface layer, the long term changes of the chemical conditions in the stagnating deep water and long-term trends of chemical and biological processes in the Baltic Sea are discussed. (HL).
The role of biological weathering in periglacial areas : a study of weathering rinds in south Iceland
Experiments using fungi strains isolated from basaltic boulders allow one to decipher biological weathering. A historical approach using heterochronous moraines provides the opportunity to follow the life of weathering rinds and helps to build
Endolithic lichens, rapid biological weathering and Schmidt hammer R-values on recently exposed rock surfaces : Storbreen glacier foreland, Jotunheimen, Norway
The aim of this paper is to investigate the rate of biological weathering in the earlier stages, on more recently exposed surfaces, including moraine ridges that were deposited by the glacier in the 1980s and 1990s. This study demonstrates
the reduction in Schmidt hammer R-values that followed the rapid colonization by this endolithic lichen of pyroxene-granulite boulders on terrain deglaciated over the last 88 years on the Storbreen glacier foreland, Jotunheimen. The rapid rate of biological