caa a22 4500 378859889 CHVBK 20180305123344.0 cr unu---uuuuu 161128e20030310xx s 000 0 eng 10.1515/BOT.2003.013 doi (NATIONALLICENCE)gruyter-10.1515/BOT.2003.013 Reproductive Strategies of Ceramium tenuicorne Near Its Inner Limit in the Brackish Baltic Sea [Elektronische Daten] [L. Bergström, E. Bruno, B. Eklund, L. Kautsky] The reproductive state of Ceramium tenuicorne (Kütz.) WӦrn was studied in a salinity and latitudinal gradient near its inner distribution limit in the brackish Baltic Sea, and in laboratory growth experiments on the gametophytes and tetrasporophytes. Along the gradient, a strong reduction in sexual reproduction and an increased tetrasporophyte dominance were observed. The observed changes may not only be explained by salinity constraints. Growth occurred between 1 and 24 PSU and the optimum range for growth corresponded well to the salinity regime of the area studied. Field observations showed that sexual reproduction is at least occasionally possible in salinities around 4 PSU. It is likely that severed climatic conditions constrain sexual reproduction towards the north, but C. tenuicorne remains an ecologically dominant species in large parts of its distributional area. Viable populations are maintained essentially by vegetative reproduction, such as fragmentation and rhizoidal re-attachment. Observations on vegetative propagules were sparse, but these may serve as an important physical escape from temporarily unfavourable conditions in areas where sexual reproduction is unreliable. Copyright © 2003 by Walter de Gruyter GmbH & Co. KG Hydrobiology nationallicence Mycology, fungi nationallicence Botany & plant sciences nationallicence Bergström L. aut Bruno E. aut Eklund B. aut Kautsky L. aut Botanica Marina Walter de Gruyter 46/2(2003-03-10), 125-131 0006-8055 46:2<125 2003 46 botm https://doi.org/10.1515/BOT.2003.013 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1515/BOT.2003.013 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bergström L. aut NATIONALLICENCE 700 1- Bruno E. aut NATIONALLICENCE 700 1- Eklund B. aut NATIONALLICENCE 700 1- Kautsky L. aut NATIONALLICENCE 773 0- Botanica Marina Walter de Gruyter 46/2(2003-03-10), 125-131 0006-8055 46:2<125 2003 46 botm CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter