Leu Eva eva.leu@akvaplan.niva.no 0000-0002-5328-3396 Wiktor Jozef M wiktor@iopan.pl 0000-0002-2344-0047 Søreide Janne E 0000-0002-6386-2471 Berge J 0000-0003-0900-5679 Falk-Petersen Stig stig.falk.petersen@npolar.no 2010 Fatty acid composition, element concentration and isotope ratios of sea ice algae sampled in Rijpfjorden, Svalbard dataset publication series https://doi.org/10.1594/PANGAEA.815810 Leu Eva eva.leu@akvaplan.niva.no 0000-0002-5328-3396 Wiktor Jozef M wiktor@iopan.pl 0000-0002-2344-0047 Søreide Janne E 0000-0002-6386-2471 Berge J 0000-0003-0900-5679 Falk-Petersen Stig stig.falk.petersen@npolar.no 2010 Increased irradiance reduces food quality of sea ice algae journal article Marine Ecology Progress Series 411 https://doi.org/10.3354/meps08647 49-60 The accelerating decrease of Arctic sea ice substantially changes the growth conditions for primary producers, particularly with respect to light. This affects the biochemical composition of sea ice algae, which are an essential high-quality food source for herbivores early in the season. Their high nutritional value is related to their content of polyunsaturated fatty acids (PUFAs), which play an important role for successful maturation, egg production, hatching and nauplii development in grazers. We followed the fatty acid composition of an assemblage of sea ice algae in a high Arctic fjord during spring from the early bloom stage to post bloom. Light conditions proved to be decisive in determining the nutritional quality of sea ice algae, and irradiance was negatively correlated with the relative amount of PUFAs. Algal PUFA content decreased on average by 40 % from April to June, while algal biomass (measured as particulate carbon, C) did not differ. This decrease was even more pronounced when algae were exposed to higher irradiances due to reduced snow cover. The ratio of chlorophyll a (chl a) to C, as well as the level of photoprotective pigments, confirmed a physiological adaptation to higher light levels in algae of poorer nutritional quality. We conclude that high irradiances are detrimental to sea ice algal food quality, and that the biochemical composition of sea ice algae is strongly dependent on growth conditions. 22.1678 22.37235 80.17 80.2659 22.294063333333334 80.21235911111111 2007-04-26T00:00:00 2007-06-07T00:00:00 not specified IPY International Polar Year (2007-2008) https://www.ipy.org/ 3 CC-BY-3.0 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 Sample comment | Tetradecanoic acid of total fatty acids | 14:0 | High Performance Liquid Chromatography (HPLC) | Fatty acids, standard deviation | FA std dev | Pentadecanoic acid of total fatty acids | 15:0 | pristanic | Hexadecanoic acid of total fatty acids | 16:0 | 16:0 pristanic | cis-7-Hexadecenoic acid of total fatty acids | 16:1(n-9) | 16:1n9 | cis-9-Hexadecenoic acid of total fatty acids | 16:1(n-7) | 16:1n7 | cis-11-Hexadecenoic acid of total fatty acids | 16:1(n-5) | 16:1n5 | Palmitolenic acid of total fatty acids | 16:2(n-7) | 16:2n7 | 6,9,12-Hexadecatrienoic acid of total fatty acids | 16:3(n-4) | 16:3n4 | 6,9,12,15-Hexadecatetraenoic acid of total fatty acids | 16:4(n-1) | 16:4n1 | Heptadecanoic acid of total fatty acids | 17:0 | Octadecanoic acid of total fatty acids | 18:0 | cis-9-Octadecenoic acid of total fatty acids | 18:1(n-9) | 18:1n9 | all-cis-9,12-Octadecadienoic acid of total fatty acids | 18:2(n-6) | 18:2n6 | all-cis-9,12,15-Octadecatrienoic acid of total fatty acids | 18:3(n-3) | 18:3n3 | all-cis-6,9,12,15-Octadecatetraenoic acid of total fatty acids | 18:4(n-3) | 18:4n3 | all-cis-5,8,11,14,17-Eicosapentaenoic acid of total fatty acids | 20:5(n-3) | 20:5n3 | Docosanoic acid of total fatty acids | 22:0 | all-cis-4,7,10,13,16,19-Docosahexaenoic acid of total fatty acids | 22:6(n-3) | 22:6n3 | Polyunsaturated fatty acids of total fatty acids | PUFA | Monounsaturated fatty acids of total fatty acids | MUFA | Saturated fatty acids of total fatty acids | SFA | SAFA | Carbon, organic, particulate, mass per area | POC | Element analyser, Thermo Finnigan flash EA 1112 | Carbon, organic, particulate, standard deviation | POC std dev | Nitrogen, organic, particulate | PON | Nitrogen, organic, particulate, standard deviation | PON std dev | Phosphorus, organic, particulate | POP | Phosphorus, organic, standard deviation | P org std dev | particulate | Carbon/Nitrogen ratio | C/N | Carbon/Nitrogen ratio, standard deviation | C/N std dev | Carbon/Phosphorus ratio | C/P | Carbon/Phosphorus ratio, standard deviation | C/P std dev | Nitrogen/Phosphorus ratio | N/P | Nitrogen/Phosphorus ratio, standard deviation | N/P std dev | Chlorophyll a, areal concentration | Chl a conc | Chlorophyll a, standard deviation | Chl a std dev | chl a : C | Ratio | Standard deviation | Std dev | (Dd+Dt) : chl a; Dd = diadinoxanthin and Dt = diatoxanthin | (Dd+Dt) : chl a | VPDB | δ13C, algae | δ13C algae | Isotope ratio mass spectrometry | δ13C, standard deviation | δ13C std dev | δ15N, algae | δ15N algae | δ15N, standard deviation | δ15N std dev supplement citable method247 method250 method6487 param100345 param103267 param103451 param105046 param108427 param120807 param124387 param124388 param124391 param127967 param127968 param127969 param127970 param1547 param16481 param18011 param18955 param19341 param19343 param21027 param24356 param29230 param29231 param50534 param5234 param5235 param5236 param5238 param5239 param5240 param5241 param5245 param5246 param5248 param5249 param5250 param5253 param5254 param53770 param75382 param97846 param97859 param99734 pi42270 author42248 author42270 author42283 author45542 author45543 geocode1599 geocode1600 geocode1601 journal10811 license101 project4164 ref59426 topotype1