EU habitat directive bryophyte species distribution and conservation in Latvia.

Bryophytes are important elements of plant communities in most habitat types worldwide. However, due to their relatively small size and difficult identification, bryophyte data are missing in many plant community studies. The objective of the present study is to increase the knowledge about EU Habitat directive bryophyte species distribution and conservation in Latvia. We compiled data from the Natural Data Management System OZOLS database about four EU Habitat Directive bryophyte species: Buxbaumia viridis, Dicranum viride, Hamatocaulis vernicosus and H. lapponicus, all indicators of high–value habitats in Latvia. The most common EU Habitat Directive species in this group was Buxmaumia viridis, which showed a significantly higher occurrence in the Western taiga habitat. Most of Hamatocaulis lapponicus and H. vernicosus localities were registered in protected areas with a high and moderate degree of protection. Most of Buxbaumia viridis and Dicranum viride localities were registered outside of the protected areas with a low degree of protection. Our results showed that EU Habitat Directive bryophyte species conservation in the long–term in Latvia is unclear, especially for B. viridis and D. viride populations. In future studies, we recommend initiating large-scale protected bryophyte monitoring programs and population studies that could contribute to plant community and global climate change research. [ABSTRACT FROM AUTHOR]