BIOMETRIC PARAMETERS OF VARIOUS MACROPHYTE SPECIES IN LAKE WIELKOWIEJSKIE: THE IMPACT OF SEASON AND CHEMICAL VARIABLES

• Main Author: Barbara Nagengast
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Chara hispida
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.490.1800; http://www.pan-ol.lublin.pl/wydawnictwa/TOchr5a/Nagengast.pdf

Summary. The research was carried out in the spring and autumn of 2001 on lake Wielkowiejskie in five stands of Typha angustifolia, Nymphaea alba, Utricularia vulgaris, Chara hispida, and C. tomentosa. The aim of the study was to describe the impact of a particular season and the chem-ical features of water within the plant habitat on the macrophyte biometric variables (stem length and dry mass in one litre of lake water) of the chosen aquatic vegetation communities. As a res-ult of this investigation it was found that the stems of Nymphaea alba and Typha angustifolia differed significantly between the two seasons and were much longer per water unit in the spring. There was also a high similarity between the communities of both Chara species obtained in rela-tion to the TOC in the water and to the stem length. Moreover, the communities of stoneworts were similar to those of the narrow leaf cattail in relation to dry mass. A positive relationship between the water hardness and the dry mass of stoneworts was found for the spring season. The obtained results indicate that the two seasons – spring and autumn – have a differentiating influ-ence on the aquatic plant communities in relation to chemical variables and biometric paramet-ers of plant habitat. Key words: macrophytes, stem length, dry mass, impact of season, chemical variables