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1

Zmiennosc morfologiczna oospor Chara fragilis Desv. w roznych typach ekosystemow wodnych Wielkopolski [materialy Kolekcji Ramienic Polski profesor Izabeli Dabskiej]

100%
Boszke P., Pelechaty M.
Ekologia i Technika
|
2006
|
tom 14
|
nr 3
118-122
2

Cechy morfologiczne oospor w populacji Tolypella glomerata (Characeae) z jeziora Lednica

100%
Boszke P., Pelechaty M.
Fragmenta Floristica et Geobotanica Polonica
|
2007
|
tom 14
|
nr 2
3

Cechy morfologiczne oospor Nitella flexilis (Characeae)

100%
Boszke P., Pelechaty M.
Fragmenta Floristica et Geobotanica Polonica
|
2008
|
tom 15
|
nr 2
4

Morphological variation of oospores in the population of Chara rudis A. Braun in a mesotrophic lake

100%
Boszke P., Bociag K.
Polish Journal of Ecology
|
2008
|
tom 56
|
nr 1
The morphological variation of Chara rudis A. Braun oospores was examined in a local population in a deep (43 m), hardwater (34 mg Ca dm–3) and mesotrophic (Ptot 0.095 mg P dm–3, SD 8 m) lake (NW Poland). Two variants of population density and three variants of depth were taken into account. Oospores are 712.8 ± 37.6 (600–817) μm long and 452.6 ± 34.2 (350–516) μm wide. They have 8–13 ridges. The outer membrane is slightly granulated. The isopolarity index (length/width × 100) is 158.4 ± 9.9 (140–190). The variation coefficient varies from 5% for oospore length to around 10% for fossa width. It was shown that the differences between oospores coming from individual depth and density variants are statistically significant. The biggest (733.21 ± 33.3 μm) oospores occurred on individuals growing at a depth of 3 m, while the smallest ones (673.3 ± 43.4 μm) at 5 m. The oospores from highly dense aggregations (> 50 individuals × 0.1 m–2) were much longer and wider than oospores from scattered (<10 individuals × 0.1 m–2) individuals. The observed intrapopulation variation of oospores can be regarded as a response to environmental changes along the depth gradient.
5
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Comparative study of the oospore morphology of two populations of a rare species Chara baueri A. Braun in Cedynia (Poland) and Batzlow (Germany)

81%
Pukacz A., Boszke P., Pelechaty M. J., Raabe U.
Acta Societatis Botanicorum Poloniae
|
2012
|
tom 81
|
nr 2
Morphological features of oospores of Chara baueri A. Braun, one of the rarest charophyte species worldwide, were studied based on 100 oospores collected from a small and temporarily dried mid-field pond near Cedynia, Western Poland. This is the first Polish and fifth presently known locality of this species. For comparison 67 oospores from a German population (similar pond localized near Batzlow, Germany) were also measured. So far, data on morphology of C. baueri oospores as well as the species ecology are limited. The only more detailed study of oospores for this species was earlier performed on 15 oospores from Kazakhstan. Largest polar axis (LPA, length), largest equatorial diameter (LED, width), isopolarity index (ISI = LPA/LED × 100), number of ridges, width of fossa, distance from apical pole to LED (AND) and anisipolarity index (ANI = AND/LPA × 100) were measured. The comparative analysis revealed that the oospores from Poland are generally bigger and more prolate than the German ones. The differences for most of studied parameters were statistically significant. The finding is discussed in the context of habitat differentiation of both studied sites. Moreover, the results obtained of oospore measurements for both populations differs from most of the data known so far from the literature.
6

Cechy biometryczne oospor Lychnothamnus barbatus z Jeziora Lagowskiego

81%
Boszke P., Pelechaty M., Pukacz A.
Ekologia i Technika
|
2007
|
tom 15
|
nr 3
79-84
7

Population structure and regeneration of Phragmites australis [Cav.] Trin ex Steud. in flood control ditches in the depression wetland [Zulawy Wislane, Northern Poland]

80%
Boszke P., Bociag K., Szmeja J.
Polish Journal of Ecology
|
2005
|
tom 53
|
nr 1
The population structure of Phragmites australis (Cav.) Trin. ex Steud. was examined in seven categories of overgrowing flood control ditches, differing on time which had elapsed from the last clean-up. Density, biomass, frequency of development stages, as well as the size and habit of the shoots, were determined in the populations. Site conditions in the ditches and the proportion of the common reed in the total biomass of plants were also examined. The rate at which populations in cleaned ditches regenerate is very quick. Three years after the maintenance works in ditches the reed population is already fully regenerated. Well developed reed rushes, which biomass is about 650 g d.w.m⁻², are dominant. Its density amounts to 76 ± 25 shoots m⁻². Flowering and fruiting shoots are the most numerous. The first signs of population regression were observed in the ditches left without cleaning for more than 5 years. Population density is gradually lower, the proportion of generative shoots is reduced, and the reed is lighter and has smaller assimilation area. In the 11-year-old and older ditches the reed is replaced by other plant species, mainly grasses and shrubs.
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