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Decomposition rate of two tea types in two different forestry niches

Żelazo Patrycja, Fyda Janusz

Science, Technology and Innovation

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2022

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Vol. 15, no. 1-2

8--16

EN

Organic matter decomposition is one of the most important processes associated with flow of energy and recirculation of organic matter in natural environments. Using commercially sold tea bags of Lipton Sencha green tea (SGT) and Lipton Ceylon black tea (CBT) their decomposition was studied in mixed and coniferous forest. At both stations 25 bags of each tea were buried for a period of 3 months. After elapsed time, the bags were dug up, dried, and the mean weight loss of organic material for each tea type and ecosystem was calculated. In the mixed forest the average weight loss of tea bags was 46.8% for Sencha and 32.1% for Ceylon tea and respectively 44.6% and 30.6%, in the coniferous forest. Statistical analysis test (ANOVA) revealed a statistically significant difference (p < 0.05) in rate of decomposition between tea types, however the differences between the decomposition of the same type of tea on both type of forest were insignificant.

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Uptake of plastic microbeads by ciliate Paramecium aurelia

Nugroho Failasuf Aulia, Fyda Janusz

Science, Technology and Innovation

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2020

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Vol. 9, no. 2

1--9

EN

Microplastics (MPs) are small fraction of plastics that are less than 5 mm in length. They are bountiful and widespread pollutants in the aquatic environment. A wide range of organisms which play an important role in the food web, ingest microplastic particles and transfer them to the higher trophic levels. In this work, ingestion of fluorescent polystyrene beads 2 µm of diameter by ciliated protozoa Paramecium aurelia in different concentrations and times of exposure was studied. We studied also the ingestion and clearance rate as well as formation of food vacuoles. The highest uptake of beads by ciliates reached 1047.2 ± 414.46 particles after 10 min of incubation. Food vacuoles formation reflected the ingestion rate of P. aurelia, which increased at higher beads concentration up to the10th minute of incubation and decreased afterwards. On the contrary, the clearance rate persisted to be higher at low concentration. These findings showed that maximum capacity of microplastics ingestion by paramecia depended on beads concentration and on time of exposure.

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Notes on occurrence of moths (Lepidoptera, Heterocera) in Ksany village in the commune of Opatowiec of the Świętokrzyskie Province

Konop Klaudia, Fyda Janusz

Science, Technology and Innovation

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2020

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Vol. 9, no. 2

28--38

EN

On selected days from July to September 2017, the butterfly species with twilight and nocturnal activity in the village of Ksany in agriculturally and little anthropogenically transferred land were studied. Catching was done in the evening and night hours, using a method of the vividly attracting to the light. Flying moths were photographed on-site for later determination. A total of 13 catches were carried out with an average at intervals of 1-2 weeks. Over 60 moths species were determined, mostly belonging to the families Geometridae and Erebidae. When analyzing the results of catches, basic weather parameters such as temperature, air pressure and moon phase were taken into account.