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The vegetation of allotment gardens is an important element of urban green areas and constitutes a habitat where many groups of insects exist, including aphids. This research involved the monitoring of winged morphs of aphids in allotment gardens in the area of Poznań with the use of Moericke traps. The fauna structure of aphids in two large allotment gardens was demonstrated by comparing the activity...
Seeds of Pyrus calleryana were sampled from 11 stations located in Poznań green areas. Three of them represented cultivar ‘Capital’, whereas the remaining eight represented cultivar ‘Chanticleer’. The viability of seeds was qualified by means of tetrazolium test. The results of staining test showed that viability of Callery pear seeds was high and ranged from 90 to 100%.
The paper presents the results of a biometrical study on the leaves of vegetative and generative shoots of Morus alba. Mature leaves were collected from the green areas of Poznań (Poland) city. Leaves from vegetative shoots were collected from 34 sites. Leaves from generative shoots were collected from specimens with blackish purple or purple fruit (13 trees) and with pale yellow to creamy fruit (21...
In 1973–2011 in Poznań, aphid catches were carried out using Johnson’s suction trap. Since then the suction trap located at the Institute of Plant Protection – National Research Institute in Poznań has continuously recorded the daily and seasonal dynamics of aphid flights. The collected results has been used to establish one of the largest databases of this type in Europe. The data also allow tracking...
Progressing urbanization results in the potential increase of pollution sources such as wastes, industrial or municipal sewage, which may contain hazardous inorganic pollutants such as e.g. metal ions and their compounds. Urbanization has a negative effect also on soil, as a consequence of an increasing share of impermeable surfaces such as pavements, parking lots, housing developments and public...
The main aim of this work was to determine the changes of meteorological conditions in Poznań, Poland, in the period 1848-2009. The onset of the analyzed period coincides with the launch of conducting instrumental meteorological measurements in Poznań. Professor Smosarski’s analyses and data were taken into account for the examination of the period 1848-1922, while data from NOAA and the Meteorological...
Detailed phycological analysis aimed at the assessment of water quality in the Sołacki Park ponds in Poznań was performed during the vegetative season of 2012. Qualitative analysis revealed the presence of a total of 294 phytoplankton taxa (244 in the Mały Pond and 246 in the Duży Pond), most of which were green algae (total 32%) and diatoms (33%). However, quantitative evaluation showed that in the...
The vegetation cover of the Głuszec stream valley was investigated. The article presents a list of 294 recorded species of vascular plants from 65 families and, also, 47 plant associations from nine classes, from three dynamic vegetation circles: Carici elongatae-Alnetum, Fraxino-Alnetum and Querco- -Ulmetum minoris. Six types of vegetation complexes were documented. Their phytocoenotic structure...
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