Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 68

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 4 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 4 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
The paper presents results of investigations on interesting and close-to-natural habitats of the north-western part of Pogórze Izerskie Foothills. Only 59 well-preservedhabitats have been found. The forests (33 patches, 281,5 ha – including ca 230 ha of oak-hornbeam forests) andthe environments of rivers and lakes (12 patches, 295 ha) are the most common. Habitats of marshes, wet meadows, termophilous grasslands and ash-alder-willow forests are very rare.
Changes in the flora of the forest communities of the “Uroczysko Obiszów” reserve (Wzgórza Dalkowskie, Lower Silesia) in 1973–1998. Fragmenta Floristica et Geobotanica Polonica 10: 119–130. Kraków. PL ISSN 1640 629X. ABSTRACT: The paper discusses changes in the flora of the forest communities of the “Uroczysko Obiszów” reserve on the hills of Wzgórza Dalkowskie (Wał Trzebnicki, Lower Silesia) which occurred in 1973–1998. During this time many species were vanishing. This group is represented mostly by plants of meadows and streams as well as thermophilous and synanthropic ones, which are replaced by new forest species. The forest communities have undergone substantial changes. Moist oak hornbeam forests (Galio Carpinetum stachyetosum) occurring in the reserve have got transformed into typical (Galio Carpinetum typicum), which have later turned into dry forms. The alder forest (Fraxino Alnetum) has lost over 50% of its plant composition since 1988. Its species diversity has declined with a simultaneous increase in the percentage and area coverage of several rush plants. Changes in the tree stand composition of the two communities are also observed.
The paper describes the flora and plant communities of the nature reserve “Uroczysko Obiszów” on Wzgórza Dalkowskie Hills (Wzgórza Trzebnicko- Ostrzeszowskie Hills, Lower Silesia). A full index of plants recorded in the reserve comprises 217 species. The most interesting include Epipactis albensis and five montane species: Senecio fuchsii, Dryopteris dilatata, Sambucus racemosa, Prenanthes purpurea,Valeriana sambucifolia. Lycopodium annotinum, which was noted in 1973 is extinct. Four plant communities occur here, i.e. oak-hornbeam forest (Galio sylvatici- Carpinetum), alder forest (Fraxino-Alnetum), soft water streams’ community of Caricetum remotae and grass-sedges community with Carex acutiformis. The oak-horbnbeamforest, which covers about 90% of an area, is very well preserved and is the most valuable community in the reserve “Uroczysko Obiszów”.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 4 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.