Fig. 2: Distribution of the Group 2i Isochrysidales, %C37:4 values, and \(U_{37}^{K{\prime}}\)-sea surface temperature bias. | Nature Communications

Fig. 2: Distribution of the Group 2i Isochrysidales, %C37:4 values, and \(U_{37}^{K{\prime}}\)-sea surface temperature bias.

From: Group 2i Isochrysidales produce characteristic alkenones reflecting sea ice distribution

Fig. 2

a Distribution of Group 2i in northern high latitude marine environment from DNA sequencing in this study, reanalyzed NGS datasets, and NCBI GenBank based on phylogeny. Orange color represents samples with Group 2i detected, yellow color represents samples with both Group 2i and other Isochrysidales detected, and green color represents samples with occurrence of other Isochrysidales and absence of Group 2i (details of samples can be found in Supplementary Data 2). Blue arrow indicates surface sediment samples where both DNA sequencing and alkenone analyses were conducted in this study. Yellow arrow denotes the location where strain RCC5486 cultured in this study was isolated from. b %C37:4 values of water filter POM compiled from Harada et al.15 and Bendle and Rosell-Melé16 are shown in circles. %C37:4 values of surface sediment samples from this study are shown in triangles. c Differences between \(U_{37}^{K{\prime}}\) reconstructed SST in surface sediment and 1981–2010 mean annual SST (WOA)83. The contour shows annual mean sea ice concentration during 1980–2010 from National Snow and Ice Data Center (NSIDC) Climate Data Record of Passive Microwave Sea Ice Concentration, Version 3, with a spatial resolution of 25 km × 25 km84 (https://doi.org/10.7265/N59P2ZTG). The blue and magenta lines show 1980–2010 median sea ice extent during March and September, respectively, (NSIDC).

Back to article page