Karatayev et al 2008 Aquatic invasions in BelarusSergey Mastitsky
This document summarizes the role of waterways in Belarus in the spread of aquatic exotic invertebrates through central Europe. It discusses how three interbasin canals constructed in the late 18th-early 19th century connecting the Dnieper River to other rivers became important pathways for species invasion. For over 100 years, only Ponto-Caspian species colonized Belarus, but new vectors emerged in the late 20th century. Currently 19 exotic aquatic invertebrates are known in Belarus, with the invasion rate increasing 7-fold in the late 20th century. The canals played a key role in species spread, and further invasions are predicted as canal reconstruction continues.
This document summarizes a two-year study of the seasonal dynamics of endosymbiotic ciliates and nematodes in the freshwater mussel Dreissena polymorpha. The study found that the prevalence and intensity of infection by three ciliate species (Conchophthirus acuminatus, Ophryoglena sp., and Ancistrumina limnica) and nematodes varied significantly over time. C. acuminatus and A. limnica infection intensities peaked in summer and correlated positively with water temperature, while Ophryoglena sp. and nematode infections were lower in summer and correlated negatively with temperature. The study also monitored body size and reproduction of C. acumin
Зачастую работая с Selenium WebDriver мы сталкиваемся с ситуацией, когда стандартные способы локации элементов не работают. Нет id, класс присущ 20 подобным элементам, другие атрибуты тоже не помогают. В этой ситуации на помощь приходят CSS и XPATH локаторы. Основной упор доклада будет сделан не на базовый синтаксис, а на дополнительные возможности, про которые зачастую забывают даже опытные автоматизаторы. К концу доклада мы сформируем "памятку", которой можно будет пользоваться в самых сложных ситуациях при нахождении веб-элементов на странице.
Karatayev et al 2008 Aquatic invasions in BelarusSergey Mastitsky
This document summarizes the role of waterways in Belarus in the spread of aquatic exotic invertebrates through central Europe. It discusses how three interbasin canals constructed in the late 18th-early 19th century connecting the Dnieper River to other rivers became important pathways for species invasion. For over 100 years, only Ponto-Caspian species colonized Belarus, but new vectors emerged in the late 20th century. Currently 19 exotic aquatic invertebrates are known in Belarus, with the invasion rate increasing 7-fold in the late 20th century. The canals played a key role in species spread, and further invasions are predicted as canal reconstruction continues.
This document summarizes a two-year study of the seasonal dynamics of endosymbiotic ciliates and nematodes in the freshwater mussel Dreissena polymorpha. The study found that the prevalence and intensity of infection by three ciliate species (Conchophthirus acuminatus, Ophryoglena sp., and Ancistrumina limnica) and nematodes varied significantly over time. C. acuminatus and A. limnica infection intensities peaked in summer and correlated positively with water temperature, while Ophryoglena sp. and nematode infections were lower in summer and correlated negatively with temperature. The study also monitored body size and reproduction of C. acumin
Зачастую работая с Selenium WebDriver мы сталкиваемся с ситуацией, когда стандартные способы локации элементов не работают. Нет id, класс присущ 20 подобным элементам, другие атрибуты тоже не помогают. В этой ситуации на помощь приходят CSS и XPATH локаторы. Основной упор доклада будет сделан не на базовый синтаксис, а на дополнительные возможности, про которые зачастую забывают даже опытные автоматизаторы. К концу доклада мы сформируем "памятку", которой можно будет пользоваться в самых сложных ситуациях при нахождении веб-элементов на странице.
This document summarizes the findings of a survey of Ponto-Caspian amphipods in the Belarusian section of the Dnieper River. Five invasive amphipod species were found: Chaetogammarus ischnus, Chelicorophium curvispinum, Dikerogammarus haemobaphes, Dikerogammarus villosus, and Pontogammarus robustoides. The number of alien amphipod species and their abundance decreased in the upstream sections of the river. Chelicorophium curvispinum and Dikerogammarus villosus were the most abundant species observed, dominating communities at the downstream sampling station.
A field experiment was conducted to determine the impact of low pH on the survival and settlement of dreissenid mussels. Water from Lake Ontario containing mussel larvae was pumped to a laboratory and divided into streams, with three streams having their pH adjusted to 7.3, 7.1, and 6.9 using phosphoric acid. The fourth stream served as a control. Adult mussels and settlement substrates were placed in tanks receiving each pH level or the control water. After 10 weeks, adult mortality reached 40% at pH 6.9. Adult mussels were significantly lighter at all pH levels compared to controls, indicating shell erosion and calcium loss. New settlement was essentially prevented at pH 7.1. The results suggest lowering pH
This document summarizes the findings of a survey of Ponto-Caspian amphipods in the Belarusian section of the Dnieper River. Five invasive amphipod species were found: Chaetogammarus ischnus, Chelicorophium curvispinum, Dikerogammarus haemobaphes, Dikerogammarus villosus, and Pontogammarus robustoides. The number of alien amphipod species and their abundance decreased in the upstream sections of the river. Chelicorophium curvispinum and Dikerogammarus villosus were the most abundant species observed, dominating communities at the downstream sampling station.
A field experiment was conducted to determine the impact of low pH on the survival and settlement of dreissenid mussels. Water from Lake Ontario containing mussel larvae was pumped to a laboratory and divided into streams, with three streams having their pH adjusted to 7.3, 7.1, and 6.9 using phosphoric acid. The fourth stream served as a control. Adult mussels and settlement substrates were placed in tanks receiving each pH level or the control water. After 10 weeks, adult mortality reached 40% at pH 6.9. Adult mussels were significantly lighter at all pH levels compared to controls, indicating shell erosion and calcium loss. New settlement was essentially prevented at pH 7.1. The results suggest lowering pH