DIGITALNA ARHIVA ŠUMARSKOG LISTA
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ŠUMARSKI LIST 1-2/1966 str. 84     <-- 84 -->        PDF

5. FOREST RESERVES ON THE LIMITS OF THE RANGES OF
DISTRIBUTION OF VARIOUS TREES SPECIES.
These reserves are particularly interesting for these species of forest trees
which, as for example Picea abies, have on the territories of Poland 2 ranges
(a lowland one — northwestern regions, and a highland one), or when across
the country passes the eastern frontier of the species range (Quercus petraea,
Abies alba, Fagus silvatica).


Populations of these species occur most commonly in groups or as individuals
scattered as small pure stands or mixed with other species. These
reserves can have an importance for the study of tree genetics or silviculture.


Particularly many reserves were made for the protection of Abies alba,
which is known as a mountain species or even a high elevation species, where
as in our country it enters forest stands in the uplands of the central part of
the country.


For the protection of external stands of fir. the following reserves were made:
»Jodly Ostrzeszowskie« 18,96 ha (56) Forest District Kalisz; »Olbina« (57) Forest
District Brzeziny with an area of 16,5 ha; »Molenda« (58) Forest District
Rydzyny with an area of 143 ha, where fir grows together with oak, pine and
spruce; »Kobiele Wielkie« 63,9 ha (59) Forest District Kobiele Wielkie, where
fir aged 100 year is mixed with oak and a small quantity of other species;
»Jata« (60) Forest District Krynszczak, with an area of 335,2 ha, where the
age of trees is up to 140 years, and also in the same Forest District the »Topör«
reserve (61) 56,5 ha in area where fir reaches 120 years in age.


An extreme stand of fir is being protected in the »Jedlina« reserve 45,64
ha (62) of the Minsk Mazowiecki Forest District where the age of trees is as
much as 160 years.


For the protection of valuable external stands of spruce reserves were
made in »Okalewo« (63), Forest District Skrwilno with an area of 7 ha, where
the spruce occurs together with beech; in which a outlier of spruce outside its
continous range is being protected.


Reserves were also made for the protection of external stands of spruce in
»Studnica« 57,8 ha (64), Forest Districts Rychtal; »Niwa« (65) with an area
of 17,8 ha, near Kepno; »Krupa« (13,6 ha) (66) near Oströw Wielkopolski and
in the Kurpiowska Forest in the Forest District Myszyniec (67).


Populations of Fagus silvatica at the eastern extremity of the species range
are being protected in the Gdansk District »Buki Mierzei Wislanej« reserve
5,92 ha (68) in the Forest District Stegna; »Buki Mierzei Elbaskiej« 92,1 ha,
Forest Districts Elblag (69); in the Bydgoszcz District, »Jamy« reserve (70);
in the Olztyn District »Bukowy« reserve (71) with an area of 8,32 ha and
»Sadlowo« reserve 24,7 ha (72) which has the most extremal stands in the
north-eastern direction.


In the Poznan District, beech population are being protected in the Forest
Direction Drawa (73), Katy (74), — Sierakow (75) and in the Lodz District in
the Forest District Brzeziny (76).


Reserve of the most eastern stands of Quercus petraea were made in
»Lipiny« 24,5 ha (77), in The Bialowieza Forest where it grows together with


Q. robur and in the Lublin District »Bachus« in the Forest Districts Chelm
52,9 ha (78) and »Kozlowka« 41 ha (79) the latter being a most valuable reserve.