The intensification of agriculture has led to a distinct regress of segetal weeds, particu larly of the specialized ones. The necessity to preserve a gene pool of th is group of the species results from scientific and ...

Linnaea borealis in Central Poland is a migrating pseudorclic. The author describes an example of local migrations of the plant, which became extinct in the reserve established for its protection, next appeared in another ...

Spontaneous renewing of the yew in Poland takes place basically on the way of endozoochory. The richest stand in Poland amounting loover 5 thousand yew trees can be found in Goleniowska Wildwood near Szczecin. Habitat ...

A problem has been raised by mycologists who have been appealing for protection of fungi which have begun to disappear. The necessity of their law protection and placing certain species on the list of protected species ...

The paper points to the necessity of resuming former utilization of steppe reserve areas, which owing to lack of grazing began to become excessively grown over with trees and shrubs (summary see page 141).

In Poland nearly ali atlantic peat-bog species are to different degrees threatened with extinction and require protection. The choice of conservation method, whether through strict or partial reservation, should depend ...

The conservation of plant gene resources means the maintenance of all diversity of flora and vegetation. Rare species are the first to be threatened with extinction. They have got limited areas and a rather scarce ...

The author has carried out a preliminary analysis and an estimation of odds and requirements for the maintenance of mountain plants in the Gdańsk-Region, i.e. in an area of their greatest density in the West Pomerania ...

The authoress has presented the actual state of reserves, national and nature parks in Pomerania, and discussed the degree of representativeness of these objects for communities and flora of particular geobotanical ...

Conservation in situ is, for many reasons, the most important means of maintaining gene resources of wild plants. Forms of this conservation must be constantly improved and increasingly more diversified, and their ...