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A parasitic sponge called Batrachochytrium dendrobatidis is considered to be responsible for the decrease in the number of germinans in the world. The fungus seems to be the best in the water at high pH. But the most affected species of frogs and rice paddies also depend on the species to which they belong, says the research.
Batrachochytrium dendrobatidis is an aquatic parasitic fungus that causes chytridiomycosis disease in sperm animals. Chytridomycosis affects the water balance of amphibians and leads to cardiac arrest.
Twelve sperm species in Skåne
The study was conducted in Skåne, where there are twelve species of seedlings. The current study includes common frog, common bug, frog, glandular frog, spotted stink bug and turtle. The proportion of individuals infected within the species varied considerably. Common insects and frogs had the lowest proportion of infected individuals, while green-flag insects, beach legs, and American frogs had the highest percentage of individuals. infected.
Besides the fact that the percentage of infected individuals differs from one species to another, the environment in the ponds and the surrounding landscape also has an impact on the environment. The proportion of infected individuals increased if the pH of the pond was high and decreased if there were forests and many surrounding ponds in the landscape.
Sensitive to temperature
Previous studies have shown that the fungus is sensitive to temperature and pH. Overall, the number of infected individuals being higher in high pH ponds, the results suggest that the fungus thrives best in such ponds. Similarly, the forest in the landscape can affect the presence of the fungus because it is relatively colder there than the more open landscapes.
Some germs avoid colder environments and dirt with specific pH values, which also affects the appearance. The researchers also showed that the proportion of infected individuals decreased with the number of surrounding ponds, which could be due to a so-called dilution effect, that is, the probability of To be infected decreases with the number of frogs or frog species in the landscape.
The fungus is widespread in Europe and Sweden and the study will better understand the factors that affect its presence. As a result, dams with a high risk of Batrachochytrium dendrobatidis may be more easily identified in more northern climates.
publication:
Kärvemo S., Meurling S., Berger D., Höglund J., Laurila A. (2018) Effects of host species and environmental factors on the prevalence of Batrachochytrium Dendrobatidisin in Northern Europe.
Contact:
Simon Kärvemo, [email protected]
Read about previous studies on the parasitic sponge Batrachochytrium dendrobatidis.
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