The increasing salinity of water in reservoirs is caused by climate change. On the other hand, an increase in salinity promotes the group species, halophytes that tolerate or need NaCl for growth. The aim of this study was to identify the response of facultative halophytes’ photosynthetic apparatus efficiency ( PE) to water salinity. The study covered the spiny water nymph ( Najas marina L.) population in four mining subsidence reservoirs. Najas marina is a facultative halophyte which means that it can occur in both fresh and salt water. This plant has the characteristics of the species invasive, such as rapid biomass growth, and wide ecological tolerance. Water salinity, described by conductivity, in the reservoirs ranged from 646 to 3061 μS∙cm –1. PE was expressed in terms of chlorophyll a fluorescence parameters, which were collected in situ using a Pocket PEA device. Water parameters using a YSI ProDSS probe were identified. Data analysis was performed using OJIP test and s the non-parametric Spearman’s rank test (p ≤ 0.05). The relationship between chlorophyll a fluorescence parameters and water parameters showed that conductivity, salinity, water clarity, and nitrate content statistically significantly affected PE (p <0.05). Generally, the higher salinity e.g. more than 3000 μS∙m –1, supports PE of facultative halophyte at the stage of optimum development in the vegetation season.

W niniejszej pracy zestawiono środowiskowy i prawny aspekt rozwoju zielonej infrastruktury na terenach miejskich, ze szczególnym uwzględnieniem dachów zielonych. Wykazano, że zarówno istniejąca zielona infrastruktura, obejmująca parki, obszary chronione, lasy, pola itd., jak i kreowana de novo, np. w postaci dachów zielonych, minimalizuje skutki zmian klimatu i jest kluczowa dla zrównoważonego rozwoju. Zidentyfikowane korzyści płynące z wprowadzania dachów zielonych to m.in.: oszczędność energii, poprawa jakości powietrza i wody, wspieranie renaturyzacji miast i wzrost różnorodności biologicznej, które łącznie sprzyjają polepszeniu jakości życia w miastach. Dlatego też wskazano potrzebę usankcjonowania rozwoju zielonej infrastruktury na terenach miejskich w systemie prawnym. Dostrzegając aktualne zagrożenia środowiskowe oraz korzyści z zielonej infrastruktury, ustawodawca europejski podał wytyczne dotyczące jej tworzenia. W artykule dokonano przeglądu stanu prawnego i oceniono, w jaki sposób polityka Unii Europejskiej została zaimplementowana do wspólnotowego oraz krajowego porządku prawnego. W szczególności zbadano, w jakim zakresie organy samorządu terytorialnego uwzględniają zieloną infrastrukturę w miejscowych planach zagospodarowania przestrzennego.

The article deals with the post-mining landscape of the Karviná region from the point of view of nature and landscape protection. From different perspectives, the subsidence of Lake Kozinec is presented, which can play an important role in the protection of nature and landscape of the post-mining landscape. A faunistic and floristic survey of the model area, including a habitat survey, was carried out.

In the more contaminated northeastern region of the Czech Republic (Moravian-Silesian Region) in 2018 and 2019, soil samples and selected agricultural and forestry products were collected. The contamination of the environment was caused by radioactive cesium ¹³⁷Cs from the nuclear Chernobyl disaster, and the activity concentration of ¹³⁷Cs was determined in all soil samples taken, ranging from 0.177 Bq kg⁻¹ dry matter (dm) to up to 299 Bq kg⁻¹ dm, with an arithmetic mean of 38.4 Bq kg⁻¹ dm. The activity concentrations of ¹³⁷Cs of agricultural and forestry products ranged from <0.02 Bq kg⁻¹ to 1390 Bq kg⁻¹ dm, and the transfer factors calculated based on these varied from 0.011 to 31 with an arithmetic mean of 3.4, with the highest values found in forest ecosystem products. The transfer factors and annual committed effective dose was calculated. It was statistically proven that the level of soil contamination with ¹³⁷Cs is related to the altitude and intensity of the precipitation in April and May of 1986, after the Chernobyl NPP accident.

Salinity is a global problem and salinity areas are constantly increasing because of poor-quality irrigation systems containing high concentration of dissolved salts, salt penetration, and water pollution. This study deals with the phytoremediation of salts from mine water using phytohormones auxin 1-naphthylacetic acid (NAA) and cytokinin (m-topolin) at a concentration 10-5 mol/l and common reed (Phragmites australis). The reed plants collected at the Lazy Mine were tested for their ability to accumulate salts from the surrounding mine waters. The experiment was carried out under controlled and controllable conditions in a phytotron. The hypothesis to be tested was a positive effect of phytohormones on the ability of the common reed to better accumulate salts from mine wastewater. The results show that the application of phytohormones in the long-range period, especially auxin, at a concentration of 10-5 mol/l could have a positive effect on the ability of reeds to accumulate salts from mine waters.

The article focuses on allelopathic interactions between plants. It presents the results of the effect of biological extracts from Solidago canadensis and Robinia pseudoacacia on seedlings of Lepidium sativum and Solidago canadensis. Solidago canadensis extracts inhibit the growth of Lepidium sativum, while Robinia pseudoacacia extracts stimulate the growth of Lepidium sativum. The application of Solidago canadensis extracts to Solidago canadensis seedlings showed signs of autotoxicity.