Nitrogen and phosphorus retention in Danish restored wetlands.
Ambio
; 49(1): 324-336, 2020 Jan.
Article
em En
| MEDLINE
| ID: mdl-30993578
ABSTRACT
Wetland restoration is considered an effective mitigation method for decreasing nitrogen (N) losses from agricultural land. However, when former cropland becomes rewetted, there is a risk that phosphorus (P) accumulated in soils will be released downstream. Here, we evaluate N and P retention in eight restored wetlands in Denmark monitored for 1 year using a mass balance approach. The wetlands represented different types, for instance, lakes and wet meadows, and ages (3-13 years). We also show the results from a long-term monitoring station established in 1973, located downstream a lake that was re-established in 2006. All restored wetlands removed total N (42-305 kg N ha-1 year-1), while some wetlands acted as source of total P and others as a sink (- 2.8 to 10 kg P ha-1 year-1). Our study confirms that restored wetlands are effective at removing N, whereas P can be released for several years after restoration.
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MEDLINE
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Fósforo
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Áreas Alagadas
País como assunto:
Europa
Idioma:
En
Ano de publicação:
2020
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Article