Environmental and overgrazing effects on diatom communities in high mountain mires.

High mountain mires are affected by anthropogenic activities such as livestock, which have changed land use, fragmented habitats, and affected the structure and functioning of aquatic communities such as diatoms. Diatoms in mires exhibit high diversity, with a significant proportion of rare and threatened species, making them vulnerable to livestock pressure. Despite their common use as indicators of ecological status, little is known about how overgrazing and trampling affect diatom communities.