Changes in sediment nutrient content in a subarctic lake subjected to lake fertilization

• Published in: Freshwater Biology
• Main Author: BJÖRK‐RAMBERG, SUSANNA
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1984
• Subjects: Aquatic Science; Subarctic
• Online Access: http://dx.doi.org/10.1111/j.1365-2427.1984.tb00029.x; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2427.1984.tb00029.x; https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2427.1984.tb00029.x

SUMMARY. 1. Phosphorus and nitrogen concentration in the surface sediment was analysed before, during and after fertilization of a small, stratified, subarctic lake. During stratification most (70%) of the added nutrients were deposited in the epilimnion sediment. 2. After 2 years of fertilization there was a significant increase of both nutrients at all water depths, although values were 30–50% higher per square metre in the shallow areas. 3. Nutrient budget calculations based on the sediment analyses showed that 75% of the added phosphorus and 45% of the nitrogen were accumulated in the sediment after fertilization.