Our biological reseurces are decreasing wordwide. We live in an era of species extention. Therefore, the reappereance of a species that has already disappesred is very important. The big mushroom grass (Androsace maxima) is a representative of disappreared regulation in the Great Hungarian Plains. The big mushroom grass is a sub-Mediterranean flora element with a Eurasian distribution. It is protected in Hungary, its nominal value is HUF 10 000. Its natural occurance can be observed primarily in the loess-covered areas in the Central Mountains in Hungary. It was observed secondarily in abandoned vineyards in the Balaton highlands. Thirdly, as a result of human interventions, we can find them in the mainly south-facing parts of kurgans and dam sides. The plant was first recorded on the side of the Gyomaendrőd dam in 2008, where it leads an isolated lifestyle. A study from 2008 to 2010 showed an increase in the number of individuals of the isolated population. Despite the significant fluctuation of the individuals of the sedge, the weed population was considered stable and able to spread. In our work, we will complete the 2024 census of the population. On the occasion of the first field trip, we take up observation points. Based on these, we concluded that the population is spreading, compared to the results of the previous study. After that, we finish counting the number of units using the square method. We made a patch map of the degree of spread. Our results confirm the spread of the population and a significant increase in the number of individuals. During our study, we also measured the intensity of seed formation. From the size of the seed production, we can deduce the following population size. In order to monitor the population of the large mushroom grass, our tests will be repeated next year.

: big mushroom grass, loess-covered, loess vegetation

biology

Presentation: poster