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Effects of Reduced Summer Precipitation on Productivity and Forage Quality of Floodplain Meadows at the Elbe and the Rhine River
Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper. nstitute of Landscape Ecology and Resource Managementnstitute of Landscape Ecology and Resource Management, Giessen, Germany.ORCID-id: 0000-0002-6953-3855
Vise andre og tillknytning
2015 (engelsk)Inngår i: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 10, nr 5, artikkel-id e0124140Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Floodplain meadows along rivers are semi-natural habitats and depend on regular land use. When used non-intensively, they offer suitable habitats for many plant species including rare ones. Floodplains are hydrologically dynamic ecosystems with both periods of flooding and of dry conditions. In German floodplains, dry periods may increase due to reduced summer precipitation as projected by climate change scenarios. Against this background, the question arises, how the forage quantity and quality of these meadows might change in future.

Methods

We report results of two field trials that investigated effects of experimentally reduced summer precipitation on hay quantity and quality of floodplain meadows at the Rhine River (2011-2012) and at two Elbe tributaries (2009-2011). We measured annual yield, the amount of hay biomass, and contents of crude protein, crude fibre, energy, fructan, nitrogen, phosphorus, and potassium.

Results

The annual yield decreased under precipitation reduction at the Rhine River. This was due to reduced productivity in the second cut hay at the Rhine River in which, interestingly, the contents of nitrogen and crude protein increased. The first cut at the Rhine River was unaffected by the treatments. At the Elbe tributaries, the annual yield and the hay quantity and quality of both cuts were only marginally affected by the treatments.

Conclusion

We conclude that the yield of floodplain meadows may become less reliable in future since the annual yield decreased under precipitation reduction at the Rhine River. However, the first and agriculturally more important cut was almost unaffected by the precipitation reduction, which is probably due to sufficient soil moisture from winter/spring. As long as future water levels of the rivers will not decrease during spring, at least the use of the hay from the first cut of floodplain meadows appears reliable under climate change.

sted, utgiver, år, opplag, sider
2015. Vol. 10, nr 5, artikkel-id e0124140
HSV kategori
Forskningsprogram
Biologi
Identifikatorer
URN: urn:nbn:se:kau:diva-37591DOI: 10.1371/journal.pone.0124140ISI: 000354214400012PubMedID: 25950730OAI: oai:DiVA.org:kau-37591DiVA, id: diva2:848152
Tilgjengelig fra: 2015-08-24 Laget: 2015-08-20 Sist oppdatert: 2019-07-11bibliografisk kontrollert

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