Acclimation limits of Fucus evanescens along the salinity gradient of the southwestern Baltic Sea
| Autor: | Nowak Petra, Porsche Christian, Dietrich Anna, Kempke Daniela, Romoth Katharina, Schubert Hendrik |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Thesaurus (information retrieval) 010604 marine biology & hydrobiology Fucus evanescens Plant Science Aquatic Science Biology 010603 evolutionary biology 01 natural sciences Acclimatization Salinity Oceanography Baltic sea 14. Life underwater Ecology Evolution Behavior and Systematics |
| Zdroj: | Botanica Marina, 62 (1). pp. 31-42. |
| Popis: | Over recent decades, the neophyte Fucus evanescens has extended eastwards along the salinity gradient within the Baltic Sea, indicating gradual adaptation to low salinity conditions. To find out whether F. evanescens can migrate further into the Baltic Sea and potentially become a competitor to the native F. vesiculosus, the acclimation potentials of different F. evanescens and F. vesiculosus populations were investigated with respect to habitat salinity. For both species, pigmentation, water content, and photosynthetic rate were measured under laboratory and field conditions. The instantaneous measurement data and incubation experiment did not show clear differences in the measured photosynthetic parameters between different salinity levels (6–20), or between species. Maximum likelihood phylogenetic analyses of the nuclear marker PDI (a putative protein disulfide isomerase) separated F. vesiculosus and F. evanescens into well-defined groups supporting the hypothesis that the two very similar species do not represent different morphotypes of the same species/gene pool. These findings indicate that – at least for the vegetative stage of F. evanescens – salinity may not be a limiting factor for a further spread into the Baltic Sea. |
| Databáze: | OpenAIRE |
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