Description
Czech nature is rich and diverse but also contains many vulnerable species. These species need an active protection. A document called an action plan contains guidelines for nature conservation authorities, researches and owners of land how to maintain endangered species populations. It is a special tool which provides complex knowledge of species and recommends the measures how to support the species. The project is about implementation of the measures. The Freshwater pearl mussel (Margaritifera margaritifera) is specially protected species therefor the “Action Plan for Freshwater Pearl Mussel” was prepared in the year 2000 with an update in 2014. The project meets the target of the state environmental policy of the Czech Republic for 2012-2020. The main objective of the project is the implementation of the action plan by monitoring of populations and environment in the southern Bohemia region, the area of Horní Malše, one of the three regions of occurrence of the species. The project outcomes are increasing knowledge of the species population and its environment. The project outputs are data from monitoring of populations and data from bioindications. Project will also include part of publicity. The target group of the project is primarily the species and nature-conservation authorities. Secondarily, the protection and connected activities will carry out the influence over the general public via education.
Summary of project results
Implementation of the measure was necessary for the successful implementation of the action plan, although it did not not directly lead to the conservation of the population or the biotope. However, it was a prerequisite for a meaningful effort to direct the population. On The Malše River was not aware if concentrate efforts on the upper less eutrophic but cold part of the biotope endangered by acidification and erosion (where the remnants of the population, including the abandoned small offspring of the past survive), or rather the middle part threatened by euthorization, but a warmer and more hospitable fragment population. No information was basically about the bottom of the European Significant Locality.The systematic monitoring of water chemistry and its annual changes took place in June, July (2x), August and September.It was performed a sampling of 21 sites to capture the effects of reservoirs/ponds in the tributaries. A probe for the continuous measuring (pH, conductivity, temperature and dissolved oxygen) was placed into the river from 17 August 2015 to 15 September 2015 to collect data in a half-hour interval. Bioindication of the microhabitat: Cages with juvenile FPMs were installed into the streamline of the river on 24 May 2015. They were exposed throughout the summer season and on 30 August 2015 they were removed. All available FMPs from Malse River were used, and located into all 3 parts of the stretch. Concurrently, FPMs from Blanice River were used. After removing the cages, the surviving and growth rates were evaluated. Publicity: We have started to cooperate with the Blattfisch Agency, which deals with FPM in Austria, to get a comprehensive overview on the pollution sources on both the sides of the border. The obtained data were evaluated for their use in the rescue program, the care of the Malše Natural Monument and the refinement of the knowledge about the adaptation of individual CU to the local conditions of the maternal flow. The evaluation was focused on obtaining an overview of the state of the river basin, taking into account the current requirements. Extremely drained, drought and ice phenomena were assessed in detail against normal flow conditions.The statistical evaluation included an evaluation of individual parameters and individual localities. We also dealt with the differential assessment of the influence of significant tributaries.
Summary of bilateral results