Korytarz ekologiczny doliny Odry pdf

Summary
taken under consideration. In order to prevent the regrowth of the open wetlands by trees
and shrubs it is proposed to mow the meadows once a year, but not earlier than in the second
half of July, so that it does not cause losses in the bird population during the hatching of
eggs.
2. New projects should be preceded by a complex and reliable natural evaluation of areas
proposed for drainage and the identification of the project’s ecological impact. The construction
of new drainage systems should be completely abandoned and only old systems
should be considered for restoration. The methods for financing drainage projects should be
amended so that the land owners should be responsible, to a large extent, for the project
costs. Damaged weirs in drainage systems among forests and meadows should be reconstructed.
In the course of drainage works, maintenance of the water holes in the fields,
ox-bows, groups of trees and shrubs as well as micro-features of land surface should be
upkept.
3. The dredging of small reservoirs (ponds) that are intended to hold water escaping from
the fields trough drainage channels and which are found along the final stretches of drainage
systems, just before they open out to the river (their receptors), should be carried out.
4. A similar solution is to cut part of a scarp into the river bank (near the drainage pipes
outlet) and create a flat shelf at the height of the mean water level and, subsequently, plant it
with rush-type vegetation.
Forest management
A change in the approach to forest management must be based on maintaining the largest
possible areas of forest in the Oder valley, as well as on the planned extension of their area.
Tree logging performed during drainage and flood-control activities must be significantly
reduced in the valley and on the scarps.
1. Attempts should be undertaken towards the preservation of the existing alder carrs,
riverside carrs and oak hornbeam forests through the provision of periodical floods; the
maintenance of a sufficiently high ground water level and its dynamics; the implementation
of a forest management focused on the existence of mature succession stages of those forests,
with special attention given to riverside carrs; the maintenance of the status of
water-protective forests for tree stands in the area between levees; resigning from the use of
clear cuttings; and increasing the felling age by 20 years.
2. In addition the following is recommended:
• the gradual restructuring of the forest in order to harmonize it with the type of habitat,
• preferred natural restoration by planting tree species that are in harmony with the habitat,
• the maintenance and restoration of a multi-layer structure of the forest,
• the reduction of thinning and undergrowth removal,
• a maximal reduction of the use of heavy machinery for logging,
• when possible, limiting forestry works to an autumn-winter season,
• maintaining suitable numbers of deer and roe deer populations, 219