PJB-2017-29
DIFFERENTIATION OF EPIPACTIS PALUSTRIS (L.) CRANTZ (ORCHIDACEAE) IN HABITATS ALTERED BY MAN BASED ON SPECIES POPULATIONS WITHIN POZNAŃ CITY (POLAND)
MAGDALENA KLUZA-WIELOCH1*, MAŁGORZATA WYRZYKIEWICZ-RASZEWSKA1, MARIA DRAPIKOWSKA2, ZBIGNIEW CELKA3 AND IRMINA MACIEJEWSKA-RUTKOWSKA4
Abstract
The aim of the study was to compare two populations of Epipactis palustris (Orchidaceae) growing in the valley of Junikowski Stream, in the south-western part of the Poznań city (square of ATPOL BD08) and to compare current results to data on the species described in the literature. Group characteristics of both populations, such as population size, average density and congestion factor, as well as the average coefficient of dispersion, were defined. Specimen variability was determined by measuring 250 generative ramets in each population. The following plant traits were included: stem length, inflorescence length, number of flowers per inflorescence, number of leaves per stem and length and width of the largest leaf. Obtained data were subjected to statistical analyses. Descriptive statistics were calculated (arithmetic average, standard deviation, minimum and maximum). The variation coefficient (V) was established to determine the variation degree of each trait. In order to determine statistical significance of average values of traits of the samples in question, the factor variance ANOVA F-statistics was used. The significance degree was examined with Scheffe's test. Principal component analysis (PCA) enabled the examination of mutual relations between the samples in the system of two first principal components. This work confirmed previous information about low variability of marsh helleborine. Individual traits in both populations were very similar. The differences concerned the group characteristics. The plants were in good condition irrespective of occupied habitat.
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