Timing Matters: Day and Night Changes in Ocean Nutrients

Phytoplankton, tiny ocean plants, have a daily rhythm. They produce a lot of carbohydrates and amino acids which bacteria love to eat. These nutrients have daily ups and downs, playing a big role in the ocean's nutrient cycle. Across different ocean areas, like near Antarctica and in the tropics, these daily changes account for a significant part of the total organic carbon and nitrogen. It turns out glucose is the main player in carbon turnover, while small amino acids lead in nitrogen turnover.Surprisingly, viruses might have a hand in these nighttime peaks, possibly destroying cells to release amino acids. This daily dance of nutrients shows how ocean life is in sync. This rhythm helps in nutrient cycling, boosting plant growth and affecting the mysterious organic carbon pathway that microbes use.