The abstract is a summary of the figures (https://www.nature.com/articles/s41598-018-38461-y#Fig2 https://www.nature.com/articles/s41598-018-38461-y#Fig2) in wo

The abstract is a summary of the figures (https://www.nature.com/articles/s41598-018-38461-y#Fig2 https://www.nature.com/articles/s41598-018-38461-y#Fig2) in words. It can be a bit hard to parse, but you can't use graphics in a paper abstract. So imagine yourself trying to convey the information in Figures 2, 3 in words only (say over a phone conversation, or a plain text message)