نتایج جستجو برای: bellamya lithophaga
تعداد نتایج: 99 فیلتر نتایج به سال:
Freshwater gastropods play key roles in shallow aquatic ecosystems, with a central position the periphyton–gastropod–fish trophic pathway, as they feed on periphyton and are preyed by animals of higher levels. Thus, it is great interest to explore how climate change impacts gastropod community cascading effects periphyton. Here, we constructed simplified, lake food web 24 large mesocosm tanks s...
The epidemiology of trematode infections in cattle was investigated within highland and lowland areas of Iringa Rural District, in southern Tanzania. Fecal samples were collected from 450 cattle in 15 villages at altitudes ranging from 696 to 1800 m above the sea level. Freshwater snails were collected from selected water bodies and screened for emergence of cercariae. The infection rates in ca...
15N isotope tracer techniques and ecological modeling were adopted to investigate the fractionation of nitrogen, its uptake and transformation in algae and snail (Bellamya aeruginosa Reeve). Different algal species were found to differ in their uptake of nitrogen isotopes. Microcystis aeruginisa Kütz. demonstrated the greatest 15N accumulation capacity, with the natural variation in isotopic ra...
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