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Våtmarker: Närsaltsfällor och/eller myllrande mångfald?
IFM div. Ecology, Linkoping University.
Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Bio- och miljösystemforskning (BLESS), Våtmarkscentrum.
Högskolan i Kalmar.
Länsstyrelsen i Örebro län.
Vise andre og tillknytning
2003 (svensk)Inngår i: Vatten: tidskrift för vattenvård, ISSN 0042-2886, Vol. 59, nr 4, s. 259-270Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This paper summarizes the state-of-the-art with respect to wetlands for nutrient removal and biodiversity enhancement, as expressed at a research workshop in December 2002. In the end of 2002, 260 and 884 wetlands had been constructed in Sweden with subsidies from LIP and the European Union, respectively. Most frequently, the aims were to remove nutrients from water and enhance biodiversity. The question raised is if we know how to design multifunctional wetlands. Should a wetland be deep or shallow, with or without macrophytes to be an efficient nutrient sink? Diverging opinions are presented, but generally it appears that fairly shallow wetlands at least partly covered by emergent macrophytes are favourable. The importance of extreme high flows and hydraulic short-circuiting is highlighted, and Danish and Norwegian approaches to wetlands construction are presented. Also, there is a risk that nutrient retaining wetlands develop a fairly trivial flora and fauna unless special care is taken. Intentional establishment of desirable and less common species, as well as creation of a variation of depth gradients to favour such species are such measures. Others are allowing for water level variations, as well as vegetation management such as grazing and harvesting.

sted, utgiver, år, opplag, sider
Nykvarn: Föreningen Vatten , 2003. Vol. 59, nr 4, s. 259-270
Emneord [sv]
våtmarker, biologisk mångfald, denitrifikation, jordbrukslandskap, kväve, fosfor
HSV kategori
Identifikatorer
URN: urn:nbn:se:hh:diva-2250Lokal ID: 2082/2652OAI: oai:DiVA.org:hh-2250DiVA, id: diva2:239468
Tilgjengelig fra: 2009-02-06 Laget: 2009-02-06 Sist oppdatert: 2019-01-24bibliografisk kontrollert

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Fleischer, SiegfriedSahlén, GöranWeisner, Stefan E.B.

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