Interrelationship among man, plants and animals in the Ituri Forest is described and analyzed. Plants contribute mainly to establish the material world of forest foragers, and their eternity gives man and animals living in the forest a sense of security and certainty for life. Animals are characterized by an ontological duality. They are like man and differ from it. They interact with man activ...

I The Amazon rain forest is a region of the earth that is undergoing rapid change. Man-made disturbance, such as clear cutting for agriculture or mining, is altering the rain forest ecosystem. For many parts of the rain forest, seasonal changes from the wet to the dry season are also significant. Changes in the seasonal cycle of floocfing and draining can cause significant alterations in the fo...

The continuing effects of red deer on the rain forest of Fiordland's Secretary Island (80 km2) over the last six years are described in relation to their initial impact and control operations. On easily accessible sites the range of affected species is increasing as the most palatable become depleted while some previously unmodified sites are now threatened. Photographic records, quantitative s...

The crown architecture of three shade-tolerant tree species (two subcanopy and one mid-canopy) was analyzed in relation to the light regime of the forest understorey. The aim was to examine to which extent shade-tolerant species variate in their crown architecture. Tree saplings (265) between 50 and 300 cm height, and distributed from understorey to variously-sized canopy gaps, were measured fo...

The structure of the social wasp communities was studied in the forest areas of the Karkonosze Mts. transformed by acid rains in 1989 and 1994. A significant increase of species diversity (H’) was observed in the season of the even year, which resulted from the increased competing interactions between queen mothers. Whereas the distribution of the species’ number decreased together with the alt...

The paper reports very important findings on long term rain chemistry data from dry remote savanna site in Africa. The interesting part of observations is that the site has unique characteristics regarding chemical composition of rain water. In most of the temperate regions where acid rain is common phenomenon, the acidity is mainly reported due to very high non sea salt SO42-. The major role p...

Rain-water-harvesting is one of the means by which agricultural production can be increased to meet the growing food demands in all regions. The study indentified the factor affecting rain-water-harvesting technology adoption for irrigation and farmers practice in water harvesting against drought in lowland woreda, Eastern Hararghe, Oromia Region. Both primary and secondary data were collected ...