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The challenges of aquaculture in protecting the aquatic ecosystems in the context of climate changes

Wróbel Jacek, Gałczyńska Małgorzata, Tański Adam, Korzelecka-Orkisz Agata, Formicki Krzysztof

Journal of Water and Land Development

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2023

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no. 57

231--241

EN

The paper discusses the current prognoses of aquaculture development worldwide putting an emphasis on its effect on the environment and the issue of the protection of water reservoirs in different countries. Water consumption in diversified aquaculture systems is presented herein as well as the characteristics of the mechanical and biological water treatment methods in fish farms, with particular attention paid to the recirculating water systems. New aquaculture technologies using post-production waters are presented. The paper provides a discussion on the contribution of aquaculture to the global greenhouse gas emissions and the means of limiting this emission. The effect of climate change on aquatic ecosystems is presented in the context of the changes of the aquaculture production profile. The paper includes a brief presentation of the methods of mitigating the changes with respect to contamination of aquatic ecosystems as well as climate change. Reducing the water footprint can be achieved through selective breeding, species diversification and implementation of more technologically advanced aquaculture systems such as: integrated multi-trophic aquaculture, aquaponics and recirculation systems in aquaculture. The need for certification of fish farms with water recirculation systems is justified in the paper. The issues addressed herein are summarised and the main areas for extending the research promoting preservation of aquatic ecosystems in aquaculture are presented.

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Sensitivity of Hydrocharis morsus-ranae L. to selected metals and its suitability for phytoremediation of waters contaminated with metals. A mesocosm study

Gałczyńska Małgorzata, Wróbel Jacek, Bednarz Katarzyna

Journal of Water and Land Development

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2022

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no. 55

67--77

EN

Anthropogenic pollution leads to increased concentrations of metals in the freshwater and macrophyte. Aquatic plants substantially contribute to the structure, function as well as and service provision of aquatic ecosystems. Our microcosm experiments were to test the possibility of the physiological response of Hydrocharis morsus-ranae to metal (Cd, Pb, Cu, Zn, Mn, Fe at three level of concentration) contaminated waters. Biomass was analysed at the beginning and at the end of the experiment. At the same time contents of photosynthetic pigments in leaves were estimated spectrophotometrically. We found that this macrophyte had the ability to grow in contaminated waters, but the effects of high concentration of isolated metals in water will indicate changes consisting in the disappearance of a significant part of biological populations were which manifested in alteration of the content of photosynthetic pigments as well as this plant’s growth. We show that generally stress of Zn and Cu influenced the drop of dry biomass which was connected with a positive correlation between the amount of dry biomass and the content of chlorophyll a and carotenoids, or only carotenoids, respectively. The highest stress of Pb and Fe (third concentrations of these metals) also influenced the drop of biomass. We concluded that none of Cd concentrations were toxic to this plant, but the effect of Mn stress was not unequivocal. Moreover, plant growth was stimulated by low Fe concentrations (first concentration) demonstrating the hormesis effect. When plants were exposed to this metal, there was no evidence of damage to the photosynthetic processes.

3

Porównanie narzędzi do tworzenia aplikacji typu SPA na przykładzie Ember i React

Wróbel Jacek

Journal of Computer Sciences Institute

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2019

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Vol. 11

145--148

PL

W artykule przedstawiono wyniki porównania narzędzi do tworzenie aplikacji typu SPA przy użyciu platformy programistycznej Ember oraz React. Badania przeprowadzono z wykorzystaniem aplikacji testowych o takiej samej funkcjonalności, ale zaimplementowanych na obu platformach. Porównanie dotyczyło struktury projektu, wybranych metryk kodu oraz efektywności renderowania stron.

EN

The article presents the results of comparison of tools for creating SPA applications using the Ember and React framework. The research was carried out using test applications with the same functionality but implemented on both platforms. The comparison concerned the structure of the project, selected code metrics and the effectiveness of page rendering.