Naslov
Effects of increasing temperatures on germination of three invasive plants in Central Europe

Autori
Rajčić, Lucija ; Kollmann, Johannes ; Teixeira, Leonardo H.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts. 33rd Conference of the Plant Population Biology. / - , 2021, 90-90

Skup
33rd Conference of the Plant Population Biology Section of the Ecological Society of Germany, Austria and Switzerland (GfÖ)

Mjesto i datum
Prag, Češka Republika, 27.05.2021. - 29.05.2021

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Solidago gigantea, Impatiens balsamifera, Jacobea aquatica, Bavaria

Sažetak
Early germination has been recognized as one of the traits contributing to successful invasion of invasive plant species. The phenological niches that arise from differences in germination time between alien and native species influence community assembly in favour of aliens, since it allows them to use resources when the competition with later germinating natives is still low. However, germination, as well as other early stages of plant develop-ment, is vulnerable to environmental conditions, and as such, it is affected by climate change. Furthermore, the production of large amounts of small seeds with potentially high germination under different conditions will also promote invasive native plants. We tested how increased temperatures affect the germination capacity of seeds of Impatiens glandulifera and Solidago gigantea (two successful invasive alien plants in C Europe), and Jacobaea aquatica (an invasive native plant causing great trouble in cultivated grasslands of S Germany). We also tested if there is an effect of local adaptation influencing the germination rates of such plants under higher temperatures based on the humidity of sampling locations. Seeds were subjected to three different temperature scenarios (15, 25 or 35 °C , comprising 14 hours of daily temperatures), and germination was monitored during 4 weeks. Our results indicate that low temperatures do not allow for germination of any of the invasive species tested. S. gi- gantea and J. aquatica germinated under warm conditions, whereby the germination of S. gigantea showed an increasing trend, and seeds of I. glandulifera did not germinate at all, possibly due to immature seeds. No effect of local adaptation was found. We conclude that global warming might facilitate the spreading of S. gigantea which is something managers should pay attention to in the future.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA