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

• Autorzy: Boszke P , Bociag K.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

morphological variability; population density; water depth; Chara rudis; oospore; mesotrophic lake

• Wydawca: -
• Czasopismo: Polish Journal of Ecology
• Rocznik: 2008
• Tom: 56
• Numer: 1
• Opis fizyczny: p.139-147,fig.,ref.

Twórcy

autor

Boszke P

• Adam Mickiewicz University, Umultowska 89, 61-614 Poznan, Poland

autor

Bociag K.

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