caa a22 4500 606164634 CHVBK 20210128100649.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s10144-014-0458-x doi (NATIONALLICENCE)springer-10.1007/s10144-014-0458-x Does pollen limitation affect population growth of the endangered Dracocephalum austriacum L.? [Elektronische Daten] [Sílvia Castro, Tomáš Dostálek, Sascha van der Meer, Gerard Oostermeijer, Zuzana Münzbergová] Reproductive strategies can have significant consequences for the viability of plant populations. Still, the effects of lower fruit set due to pollen limitation on plant demography and population persistence have rarely been explored. The objectives of this study were to assess the ecological factors determining female reproductive success and to study the impact of pollen limitation on population growth of Dracocephalum austriacum L. (Lamiaceae), a critically endangered species with a discontinuous distribution across Europe. Despite the significant background information gathered on the population dynamics and genetic diversity of D. austriacum, little is known about its reproductive strategy and the effect it has on population growth. Thus, the reproductive system, pollinator assemblage and pollen limitation were studied in natural populations and the impact of pollen-limited seed production on population growth was assessed using existing transition matrix models. The results revealed that D. austriacum is protandrous self-compatible species that produces very few seeds in the absence of pollinators. The flowers are visited by several insects, including legitimate pollinators (e.g., Bombus hortorum, Osmia spp.) and nectar robbers (other Bombus spp., O. aurulenta). Fruit and seed production was significantly pollen-limited in all populations studied. However, despite the positive effect of pollen supplementation on seed production, the resulting increase in seed number did not significantly increase population growth rates in any of the studied populations. Hence, we conclude that populations are demographically stable and current natural seed production is sufficient for the species' persistence. The Society of Population Ecology and Springer Japan, 2014 Endangered species nationallicence Pollen limitation nationallicence Pollinator assemblage nationallicence Population growth rate nationallicence Population persistence nationallicence Reproductive system nationallicence Castro Sílvia CFE, Centre for Functional Ecology and Department of Life Sciences, Faculty of Sciences and Technology, University of Coimbra, Calçada Martim de Freitas, 3000-456, Coimbra, Portugal aut Dostálek Tomáš Institute of Botany, Academy of Sciences of the Czech Republic, Zámek 1, 252 43, Průhonice, Czech Republic aut van der Meer Sascha Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, PO Box 94062, 1090 GB, Amsterdam, The Netherlands aut Oostermeijer Gerard Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, PO Box 94062, 1090 GB, Amsterdam, The Netherlands aut Münzbergová Zuzana Institute of Botany, Academy of Sciences of the Czech Republic, Zámek 1, 252 43, Průhonice, Czech Republic aut Population Ecology Springer Japan 57/1(2015-01-01), 105-116 1438-3896 57:1<105 2015 57 10144 https://doi.org/10.1007/s10144-014-0458-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10144-014-0458-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Castro Sílvia CFE, Centre for Functional Ecology and Department of Life Sciences, Faculty of Sciences and Technology, University of Coimbra, Calçada Martim de Freitas, 3000-456, Coimbra, Portugal aut NATIONALLICENCE 700 1- Dostálek Tomáš Institute of Botany, Academy of Sciences of the Czech Republic, Zámek 1, 252 43, Průhonice, Czech Republic aut NATIONALLICENCE 700 1- van der Meer Sascha Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, PO Box 94062, 1090 GB, Amsterdam, The Netherlands aut NATIONALLICENCE 700 1- Oostermeijer Gerard Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, PO Box 94062, 1090 GB, Amsterdam, The Netherlands aut NATIONALLICENCE 700 1- Münzbergová Zuzana Institute of Botany, Academy of Sciences of the Czech Republic, Zámek 1, 252 43, Průhonice, Czech Republic aut NATIONALLICENCE 773 0- Population Ecology Springer Japan 57/1(2015-01-01), 105-116 1438-3896 57:1<105 2015 57 10144