caa a22 4500 605509344 CHVBK 20210128100640.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s10452-015-9533-4 doi (NATIONALLICENCE)springer-10.1007/s10452-015-9533-4 Photosynthetic characteristics of the benthic diatom species Nitzschia frustulum (Kützing) Grunow isolated from a soda pan along temperature-, sulfate- and chloride gradients [Elektronische Daten] [Edina Lengyel, Attila Kovács, Judit Padisák, Csilla Stenger-Kovács] The Carpathian Basin hosts a number of small, shallow, saline, alkaline ponds. As being endorheic basins, they are highly threatened by the climate change and response of biota to changing climate has been largely unexplored. We investigated the effects of salinity changes on the photosynthetic activity of Nitzschia frustulum, which is one of the main dominant taxa of the saline lakes in the Fertő-Hanság Region of the Carpathian Basin. The photosynthetic activity of the species was measured along temperature (5, 10, 15, 20, 25, 30, 35, 40°C), light (0-8-35-70-110-200-400-800-1200µmolm−2s−1), SO4 2− (0-50-600-1200-2400-3600-4800mgL−1) and Cl− (0-36-437.5-875-1750-3500-5250mgL−1) gradients under laboratory conditions in photosynthetron. The conductivity optimal of N. frustulum was around 5600µScm−1 with wide salinity tolerance. The species preferred the HCO3 −-SO4 2−-type waters since its photosynthetic activity (3.62mgCmgChl-a −1h−1) was more than twice higher than in HCO3 −-Cl−-type media. Its photosynthesis saturated at very low-light intensity, and photoinhibition was not observed during the experiments. The maximal photosynthesis was measured at 28-29°C. However, above 30°C, the decline of photosynthesis of N. frustulum can be forecasted. Springer Science+Business Media Dordrecht, 2015 Nitzschia frustulum nationallicence Photosynthetic activity nationallicence Salinity nationallicence Temperature nationallicence Light nationallicence Saline lakes nationallicence Lengyel Edina MTA-PE, Limnoecology Research Group of the Hungarian Academy of Sciences, Egyetem u. 10, 8200, Veszprém, Hungary aut Kovács Attila Balaton Limnological Institute, MTA Centre for Ecological Research, Klebelsberg Kuno u. 3., 8237, Tihany, Hungary aut Padisák Judit MTA-PE, Limnoecology Research Group of the Hungarian Academy of Sciences, Egyetem u. 10, 8200, Veszprém, Hungary aut Stenger-Kovács Csilla Department of Limnology, University of Pannonia, Egyetem u. 10, 8200, Veszprém, Hungary aut Aquatic Ecology Springer Netherlands 49/4(2015-12-01), 401-416 1386-2588 49:4<401 2015 49 10452 https://doi.org/10.1007/s10452-015-9533-4 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/s10452-015-9533-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lengyel Edina MTA-PE, Limnoecology Research Group of the Hungarian Academy of Sciences, Egyetem u. 10, 8200, Veszprém, Hungary aut NATIONALLICENCE 700 1- Kovács Attila Balaton Limnological Institute, MTA Centre for Ecological Research, Klebelsberg Kuno u. 3., 8237, Tihany, Hungary aut NATIONALLICENCE 700 1- Padisák Judit MTA-PE, Limnoecology Research Group of the Hungarian Academy of Sciences, Egyetem u. 10, 8200, Veszprém, Hungary aut NATIONALLICENCE 700 1- Stenger-Kovács Csilla Department of Limnology, University of Pannonia, Egyetem u. 10, 8200, Veszprém, Hungary aut NATIONALLICENCE 773 0- Aquatic Ecology Springer Netherlands 49/4(2015-12-01), 401-416 1386-2588 49:4<401 2015 49 10452