Sammanfattning

Contradictory results for the long-term evolution of nitrogen and phosphorus concentrations in waters discharging from drained peatland forests need reconciliation. We gathered long-term (10-29 years) water quality data from 29 forested catchments, 18 forestry-drained and 11 undrained peatlands. Trend analysis of the nitrogen and phosphorus concentration data indicated variable trends from clearly decreasing to considerably increasing temporal trends. While the variations in phosphorus concentration trends over time did not correlate with any of our explanatory factors, trends in nitrogen concentrations correlated positively with tree stand volume in the catchments and temperature sum. A positive correlation of increasing nitrogen concentrations with temperature sum raises concerns of the future evolution of nitrogen dynamics under a warming climate. Furthermore, the correlation with tree stand volume is troublesome due to the generally accepted policy to tackle the climate crisis by enhancing tree growth. However, future research is still needed to assess which are the actual processes related to stand volume and temperature sum that contribute to increasing TN concentrations.

Nyckelord

Drainage; Forestry; Peatlands; Temporal trends; Water quality

Publicerad i

Water, Air, and Soil Pollution
2021, Volym: 232, nummer: 9, artikelnummer: 371
Utgivare: SPRINGER INTERNATIONAL PUBLISHING AG

SLU författare

• Maher Hasselquist, Eliza

  • Institutionen för skogens ekologi och skötsel, Sveriges lantbruksuniversitet
    

Globala målen

SDG6 Säkerställa tillgången till och en hållbar förvaltning av vatten och sanitet för alla


UKÄ forskningsämne

Oceanografi, hydrologi, vattenresurser
Miljövetenskap


Publikationens identifierare

DOI: https://doi.org/10.1007/s11270-021-05293-y

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/113595