The scientists studied how a type of red seaweed, Grateloupia turuturu, responds to not having enough nitrogen and then getting it back. They found that the seaweed absorbs ammonium faster than nitrate after getting nitrogen back. During nitrogen starvation, pigment levels dropped faster than protein levels. Even after getting nitrogen back, the seaweed couldn't fully recover its growth rates and pigment levels from long-term starvation. This research helps us understand how to grow this seaweed better.