20.500.12556/RUL-102525 Vpliv mikroplastike na prehranjevanje ter rast kopenskih rakov enakonožcev po dolgotrajni izpostavitvi Effects of microplastics on feeding and growth rate of terrestrial isopods after long-term exposure Onesnaženost okolja z mikroplastiko je globalni problem, ki se ga ob samem začetku množične proizvodnje plastičnih materialov nismo zavedali, danes pa ugotavljamo vse več negativnih vplivov na kopenske, morske in sladkovodne organizme. Tekstilna plastična mikrovlakna (t. i. mikrovlakna, dolžina pod 5 mm) so ena izmed mnogih oblik mikroplastike, ki se kopiči v okolju. Z magistrskim delom smo želeli preveriti vpliv mikrovlaken (dolžine 15–1288 µm) kot tudi tekstilnih plastičnih mezovlaken (t. i. mezovlakna, 11.81 ± 3.7 mm) na kopenske rake enakonožce vrste Porcellio scaber Latreille po dolgotrajni štiritedenski izpostavitvi. Spremljali smo prehranjevanje, rast in nivo energetskih zalog (ogljikovi hidrati, lipidi, proteini) kopenskih rakov enakonožcev, izpostavljenih zemlji z mikro-/mezovlakni, ter pojav izbirnega vedenja pri rakih, izpostavljenih neonesnaženi in onesnaženi zemlji z mikrovlakni. Ugotovili smo, da kronična izpostavitev v izbranih koncentracijah mikrovlaken in mezovlaken v zemlji ne vpliva statistično pomembno na izbrane testne parametre kopenskih rakov enakonožcev. Pomembno bi bilo preveriti vpliv mikroplastike, ki se kopiči v okolju, pri še višjih koncentracijah in po daljši kronični izpostavitvi ter uporabiti še dodatne metode za spremljanje laboratorijsko merljivih subletalnih odzivov poskusnih organizmov. Microplastics pollution of the environment is a global problem that was not realized at the very beginning of the plastic materials mass production, but today we are finding more and more negative effects on terrestrial, marine and freshwater organisms. Textile plastic microfibers (so-called microfibers, length bellow 5 mm) are one of many microplastic forms, accumulating in the environment. With the master master`s thesis we wanted to check the effect of microfibers (length 15–1288 µm) and textile plastic mesofibers (so-called mesofibers, 11.81 ± 3.7 mm) on the tererestrial isopod Porcellio scaber Latreille, after prolonged four week exposure. We monitored feeding, growth and level of the energy reserves (carbohydrates, lipids, proteins) of terrestrial isopods exposed to micro/mesofibers in the soil and the occurrance of the the selective behaviour of isopods, exposed to uncontaminated and with microfibers contaminated soil. We found out that chronic exposure to the selected concentrations of microfibers and mesofibers in the soil, does not have a statistically significant effect on the selected parameters of the terrestrial isopods. It would be important to examine the impact of the microplastic accumulation in the environment at even higher concentrations and after a longer chronic exposure and to use additional methods for monitoring labaratory measurable sublethal responses of experimental organisms. Porcellio scaber kopenski rak mikrovlakna mezovlakna Porcellio scaber terrestrial isopod microfibers mesofibers true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2018-09-01 07:45:02 2018-09-01 07:45:15 2022-08-15 03:42:19 0000-00-00 00:00:00 2018 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 154426 4890703 3597.pdf 3597.pdf 1 37084D3B4B2F53D642C0096072738860 83200db00b119fd1a1803ffd0563f433536d352c4e82f69c236edb7782cd7f25 8aa354f9-a1b5-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=112843 Biotehniška fakulteta 0 0 0