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Is the flora of oxbow lakes different from that of fishponds? A comparison of two types of water reservoirs in the Notec River valley and Bydgoszcz Canal valley (NW Poland)

100%

Waldon-Rudzionek B.

Ecological Questions

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2017

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tom 25

The study was conducted in the growing seasons of 2011–2013 and involved 10 oxbow lakes located in the vicinity of Chobielin and 10 fishponds near Ślesin (north-western Poland). The oxbow lakes were characterized by a greater floristic diversity (212 species) compared with the ponds (131 species). Their flora has a more natural character, which is manifested in a higher pro- portion of native species, including non-synanthropic spontaneophytes (45.3%) as well as some legally protected species. In the ar- tificial reservoirs, non-native species represented 12.2% of the total number of species, in natural reservoirs – only 8.5%. The main differences in the spectrum of life forms were manifested in a higher relative abundance of phanerophytes in the vegetation of the oxbow lakes (10.8%), and a higher abundance of hydrophytes along with helophytes (17.6%), therophytes (18.3%), and geophytes (16.3%) in the ponds. The flora of the oxbow lakes was represented by species belonging to 20 phytosociological classes, while the flora of the ponds – 14 classes. Molinio-Arrhenatheretea and Phragmitetea australis accounted for the highest relative species abun- dance in both types of water bodies. Oxbow lakes are characterized by a much greater proportion of species from Querco-Fagetea, almost exclusively non-synanthropic spontaneophytes. Management practices associated with the maintenance of the ponds translate into a higher proportion of ruderal species, by nearly 6%. As a result, taxa from Artemisietea vulgaris were more numerous in the ponds. Edificators from Lemnetea minoris and Potametea were also abundant there. The differences in the analysed flora, resulting primarily from different origins of the reservoirs and their surroundings (mainly forests in the case of the oxbow lakes and meadows around the ponds), was confirmed by statistical analysis and synanthropization indices. Despite their different origin and management methods, both types of reservoirs are valuable refuges for native flora and are characterized by high and similar values of floristic diversity indices. While the oxbow lakes are protected from degradation as protected habitats, the existence and condition of vegeta- tion in fishponds are entirely dependent on the economic regime of fish farms.

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Porównanie udziału chronionych i zagrożonych gatunków roślin w kompleksach ich zbiorowisk roślinnych doliny Noteci i Kanału Bydgoskiego

100%

Waldon-Rudzionek B.

Ekologia i Technika

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2015

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tom 23

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nr 5

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Nowe stanowisko szczeżui chińskiej Sinanodonta woodiana (Lea, 1834) w Dolinie Noteci (Wielkopolska)

63%

Waldon-Rudzionek B., Rudzionek B.

Przegląd Przyrodniczy

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2016

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tom 27

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nr 1

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Nowe dla Polski stanowisko gwiazdy wieloporowatej Myriostoma coliforme w rezerwacie Las Mariański w pobliżu Bydgoszczy

63%

Waldon-Rudzionek B., Rudzionek B.

Chrońmy Przyrodę Ojczystą

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2017

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tom 73

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nr 4

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Species share of Molinio-Arrhenatheretea class in vegetation of the Forest Arboretum in Zielonka near Poznań and in adjacent treestands

51%

Ratynska H., Lewandowska A., Waldon-Rudzionek B., Mazur M.

Steciana

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2015

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tom 19

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nr 4

Experimental-Research Unit – Forest Arboretum in Zielonka is located in the Puszcza Zielonka Landscape Park near Poznań and is bordering experimental forests of the Poznań University of Life Sciences. The aim of the studies was to identify the diversity of flora and vegetation of green areas in 13 landscape units, distinguished on the basis of the natural lie of the land, as well as forms and intensity of human impacts. 536 vascular plants species, including 82 of Molinio-Arrhenatheretea class and 102 plant communities with 13 of green areas therein were identified. Taxa and syntaxa of the class mentioned above are present in nearly all complexes of plant communities. The largest acreage of meadows and pastures belongs to the complex of green areas, where the presence of 57 species of Molinio-Arrhenatheretea class and seven associations were revealed. The lowest number of such indicators was found in aquatic and rush vegetation complex of water basins and in ruderal vegetation of build-up areas and roads, whereas their absence in watercourses vegetation complex. Characteristic species share of Molinia and fresh green areas is highly variable in analysed delimitations.

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The occurrence of Atriplex littoralis L. in Poland

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Ratynska H., Waldon-Rudzionek B., Wachowiak E.

Steciana

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2016

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tom 20

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nr 3

The Atriplex littoralis L. is a rare and endangered species in Poland and many other countries in Europe. In Poland it is mainly found on the west coast and also rarely in central parts. It has been seen in Puck Bay and the Gulf of Gdańsk as well as in Hel Peninsula. The grassleaf orache is a halophyte, terophyte and a sunlight-loving plant. Data shows that apart from on the coast, this species may also appear in inland areas, for example on ruderal habitats such as roadsides. The results of our observations confirm the presence of the species on beaches and rocky bank reinforcement, with accumulation of annual vegetation in the Hel Peninsula and Puck Bay. Five sites, where Atriplex littoralis specimens occur have been found. In each site 1 to 15 specimens where found, in total 31. Five phytosociological relevés were made within the floristically poor patches of Matricario maritimae-Atriplicetum littoralis (Christiansen 1933) R.Tx. 1950. This association represents the protected type of habitat: Annual vegetation of drift lines (1210).

Ograniczanie wyników

2 Steciana

1 Chrońmy Przyrodę Ojczystą

1 Ecological Questions

1 Ekologia i Technika

1 Przegląd Przyrodniczy

6 Waldon-Rudzionek B.

2 Ratynska H.

2 Rudzionek B.

1 Lewandowska A.

1 Mazur M.

1 Wachowiak E.

2 2017