Water Depth Underpins the Relative Roles and Fates of Nitrogen and Phosphorus in Lakes

Eutrophication mitigation is an ongoing priority for aquatic ecosystems. However, the current eutrophication control strategies (phosphorus (P) and/or nitrogen (N)) are guided mainly by nutrient addition experiments in small waters without encompassing all in-lake biogeochemical processes that are associated largely with lake morphological characteristics. Here, we use a global lake data set (573 lakes) to show that the relative roles of N vs P in affecting eutrophication are underpinned by water depth. Mean depth and maximum depth relative to mixing depth were used to distinguish shallow (mixing depth > maximum depth), deep (mixing depth

• NN
  National Natural Science Foundation of China

  Awards: 41621002, 41790423
• CA
  Chinese Academy of Sciences

  Award: QYZDJ-SSW-DQC008