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Title: FACTORS POTENTIALLY CAUSING DIFFERENCES IN SEED VIABILITY OF PULSATILLA PATENS POPULATIONS IN LATVIA: A PILOT STUDY
FACTORS POTENTIALLY CAUSING DIFFERENCES IN SEED VIABILITY OF PULSATILLA PATENS POPULATIONS IN LATVIA: A PILOT STUDY

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Anita Osvalde; Dace Klavina; Gunta Jakobsone
10.5593/sgem2022/5.1/s20.023
10.5593/sgem2022/5.1
1314-2704
978-619-7603-46-0
English
22
5.1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Ecology and Environmental Protection
The Eastern pasqueflower (Pulsatilla patens (L.) Mill.) is considered as an endangered species in all European countries where it is found, including Latvia. An important factor for the survival of P. patens - a species with low competitiveness is not only the conditions suitable for germination and further growth, but also the indicators of seed viability. This is particularly important as there is no persistent soil seed bank for this species. Only limited data is available on the factors affecting seed viability, especially in the terms of soil conditions. Therefore, the main goal of this study was to find out the potential relationship between seed viability and soil agrochemical composition in 8 different locations of P. patens in Latvia. Demographic parameters were also analyzed as factors that could lead to differences in seed viability between populations. Overall, there were almost no substantial differences between study sites in terms of the seed production per one infructescence of P. patens. However, significant differences were found in seed viability data, with the percentage of viable seeds ranging from 2.1% to 53.8%. The results revealed a significant positive correlation between seed viability and concentrations of Ca and Mg in the soil. Our study suggested that one of the factors that positively affect seed viability could be the higher micronutrient (B, Cu, Fe) level in the topsoil. In addition to the wide range of nutrient concentrations in the soil, the studied sites also differed according to the demographic characteristics of the populations. Preliminary results showed that populations with a higher proportion of new generative plants had higher levels of viable seeds. This was convincingly evident in the nearby sample plots. Comparing the two adjacent areas, it was found that new generative plants dominated in those where the values of at least two soil parameters, such as Ca, Mg, organic matter, Cu and Fe, were higher. Further research is needed to better understand the relationship between soil conditions, population demographics and seed viability, thus contributing to the development of protection measures for P. patens in Latvia.
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We are grateful for the financial support provided by Nature Conservation Agency of Latvia, project No 7.7/156/2017-P and No 7.7/258/2019.
conference
https://doi.org/10.5593/sgem2022/5.1/s20.023
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Proceedings of 22nd International Multidisciplinary Scientific GeoConference SGEM 2022
22nd International Multidisciplinary Scientific GeoConference SGEM 2022, 04 - 10 July, 2022
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Turkish Acad Sci.
175-182
04 - 10 July, 2022
website
8687
pasqueflower, endangered status of species, tetrazolium test, soil nutrient concentrations, demographic parameters