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Irgc News 29 IRGC NEWS INTERNATIONAL RESEARCH GROUP ON CHAROPHYTES ISSN 1834-6030 Edited by: K. Torn, M. Casanova, S. Schneider, A. Pukacz and E. Nat 29 March 2018 CONTENTS Editorial 1 IRGC homepage 16 Welcome to new IRGC members 2 IRGC in Facebook 16 Report on past meetings 2 Conservation of charophytes 17 Forthcoming meetings 8 Reference article 19 22nd GEC: first circular 10 Charophytes in Australia 24 IRGC in Tunisia 13 PhD thesis completion 25 Other meetings 14 Membership fees 26 New electronic key 16 E-mail addresses of IRGC members 27 Special issue 16 Group photograph 21st GEC, Valencia 28 EDITORIAL We are happy to present the new issue of the IRGC news, filled with information which you will hopefully find interesting. Duringthe last year, we had a very nice and interesting GEC meeting, excellently organized in Valencia by Maria Rodrigo, with the help of Carmen Rojo, Sara Calero, Eric Puche, and Mati Segura. Many thanks to all the organizers, for the fantastic location, the perfect organization, the very nice food and the interesting field trips! Our organization is small but very active, and this means we have already plans for the forthcoming three meetings. These will be: (1) a GEC meeting in September 2018, inSicily (you will find more information about it in this issue of the News). (2) Then we will have an IRGC meeting in March 2020, in Tunisia: more information is available in this issue of the News. Please note that – contrary to what was our usual practice, the IRGC meeting will be held in March! The reason is the warm and dry summer in Tunisia, which generally causes the smaller water bodies (containing charophytes) to dry out. This is why a field trip in September would not make much sense. And then (3) we will have a GEC meeting in Latvia, in September 2021. Please note that we changed the schedule of the GEC in Latvia! The reason was that the original date (September 2019) would have been too close to the IRGC in Tunisia (only half a year between GEC and IRGC). I warmly welcome our new members, and thank all of you who help to keep our association alive, by preparing information for the IRGC news and the website, streamlining the English, posting information on our Facebook group account, organizing and participating in meetings, and generally by staying enthusiastic about charophytes. Susanne Schneider 1 WELCOME TO NEW IRGC MEMBERS refuge during the maximum post-paleaozoic sea-level when fossil charophytes were It is a great pleasure to welcome our new extremely rare. The refugium was detected in members : Angelo Troia (Italy), Arno the Catalan Coastal Chain, within the city of Schwarzer (Switzerland), Eric Puche Franqueza Tarragona and was dominated by Atopochara (Spain), Strzałek Małgorzata (Poland), Michał trivolvis multivolvis (Peck). Brackish water Brzozowski (Poland), Anne Herbst (Germany), charophyte community evolution was Ralf Becker (Germany), Nadia Abdelahad presented by Alba Vicente. Porocharaceans, (Italy), and Ivana Trbojević are warmly particularly Feistiella malladae dominated the welcomed. Upper Cretaceous. Lamprothamnium coexisted with Feistiella malladae ca. 4 MA REPORT ON PAST MEETINGS and the latter became extinct at the beginning of the Cenozoic. Lamprothamnium became dominant in brackish environments during the st 21 Meeting of the Group of European remaining of the Palaeogene and Neogene Charophytologists (GEC) until now. Fateh Mebrouk analysed six fossiliferous Charophyte-bearing localities, Oral Presentations which are situated in the intermediate member of the Hammada formation (Algeria) from early in the late Eoceneto early in the The oral presentationsforthe 21st meeting of the Group of European Charophytologists middle Eocene. 18 species of 9 genera were occurred from 18-19 September 2017 in identified, which represent two main families: the Characeae and the Raskyellaceae. Aizhan València, Spain. The meeting was organized by Zhamangara clarified the identity of Maria A. Rodrigo and her organizing charophytes from localities of the Eocene and committee atthe Cavanilles Institute for the Oligocene from Kazakhstan: Zaisan Basin, Biodiversity and Evolutionary Biology. The Shynzhaly locality and Turgay region. Institute is located at the Scientific Park in the Taxonomical clarification was based on north part of the city where the oral species morphology (diversity of gyrogonite presentations took place. 19 talks were given shapes, presence of ornamented and non- in seven lecture sessions: 1) Fossil charophytes, 2) Extant charophytes – ornamental gyrogonites). Methodologies for taxonomy, 3) Extant charophytes – Methodologies for Experimentation, 4) Calcification: taxonomy Relationships with key elements, 5) The lecture session continued with the Charophytes versusangiosperms, 6) Diversity, presentations of extant charophytes – distribution and conservation, and 7) methodologies for taxonomy. Sara Calero Management. The presentations are proposed a methodological approach to summarized in the following sections. identify a size threshold to differentiate Fossil charophytes unripe from ripe gametangia throughout the Roch-Alexandre Benoit started with a review year. She tested this method with different of the Upper Jurassic and Lower Cretaceous charophytes: Chara hispida (monoecious), C. charophyte assemblages from the northern aspera (dioecious), and C. canescens (dioecious and parthenogenetic). Susanne part of the Aquitaine Basin in south-west Schneider studied European Tolypella France. Records of abundant porocharaceans, specimens by analysing the plastid genes psbC less abundant clavatoraceans and scarce and rbcL. The results supported the characeans in Cherves-de-Cognac and Angeac- monophyly of the sections Rothia and Charente indicate that brackish water Tolypella. Within the genus Tolypella environments were substituted by freshwater environments eastwards. Carles Martín-Closas determination of species were discussed. provided evidence of a new charophyte 2 Experimentation Charophytes versus angiosperms Eric Puche presented the role of charophytes Kaire Torn talked about environmental niche as indicators of the interactive effects of the separation between charophytes and global change. Microcosms were used to angiosperms of Estonian sea area. study the interactive effect of UV-radiation Angiosperms showed a higher separation in with temperature and nitrate concentrations niche position and variability of environmental of C. hispida and C. vulgaris. Temperature and niche breadth compared to charophytes. nitrate concentration modulated the effect of Depth, salinity and duration of ice cover had UV-radiation on charophytes. This effect also the most influence on this. Michał Brzozowski depends on the origin of the charophytes, as showed that Lychnothamnus barbatus co- mentioned by Maria A. Rodrigo. She showed occurs with eutrophic bioindicators preliminary results of the first mesocosm (Nitellopsis obtusa, Ceratophyllum demersum experiment based on the microcosm and Myriophyllum spicatum) in Lake Kuźnickie, experiments of Eric Puche. In the mesocosm a moderately eutrophic water body in western approach the effect of two combinations of Poland. Furthermore L. barbatus selected factors (temperature and UVR:PAR overwintered in Lake Kuźnickie in the form of ratio) on the horizontal food-web was extensive meadows and produced fully analysed. developed gyrogonites. Calcification: Relationships with key Diversity, distribution and conversation elements Roman E. Romanov characterized the species Anne Herbst studied the precipitation of richness, distribution and ecology of Tolypella calcium carbonate by charophytes in waters from western, central and northern Asia. New with extreme ion concentrations of calcium, records were found for T. prolifera in Israel potassium, magnesium, sodium, chloride and and Turkey, T. glomerata in Northern and sulphate. Incrustation potential was species-, Central Asia (Russia – Southern Siberia, site- and age-specific and correlated Kazakhstan), and T. hispanica in Northern Asia negatively with magnesium concentrations of (Russia – Western Siberia) and Mongolia. Egita the habitats. Irmgard Blindow presented Zviedre presented the distribution and information about incrustation of charophytes ecology of the genus Nitella in Latvia. Four from freshwater and brackish sites finding species of Nitella were recorded in Latvia. The that there was more pronounced incrustation most common species is N. confervacea, N. in freshwater. Also species-specific differences flexilis is alsocommon, mainly in south-east in carbonate content and especially potassium part of Latvia, and N. mucronata and N. content were detected which may be syncarpa are both rare species. Angelo Troia explained by differences in turgor regulation. gave a talk about charophytes of inland Andrzej Pukacz analysed the phosphorus waters of the island of Sicily. Only few fraction in charophyte biomass of three monitoring data are available (19 charophyte littoral sites. Seasonal variability in dry weight species of 4 genera). An updated list of the and carbonate content was observed. The species occurrence and distribution of Sicily is total phosphorus concentration in charophyte currently lacking. Ralf Becker reported on the biomass differed season-to-season and the high species diversity of charophytes of fraction with the lowest/highest share in Sardinia and found numerous hotspots charophyte biomass was soluble reactive P especially for brackish species. In his (NaOH-SRP)/calcium-bound P (HCl-P).
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