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dc.contributor.authorMoe, Therese Fosholt
dc.contributor.authorHessen, Dag Olav
dc.contributor.authorDemars, Benoît Olivier Laurent
dc.date.accessioned2019-10-08T09:42:22Z
dc.date.available2019-10-08T09:42:22Z
dc.date.created2019-07-02T13:32:24Z
dc.date.issued2019
dc.identifier.citationScience of the Total Environment. 2019, 677, 447-455.nb_NO
dc.identifier.issn0048-9697
dc.identifier.urihttp://hdl.handle.net/11250/2620829
dc.description.abstractAtmospheric N pollution may shift nutrient limitations in aquatic autotrophs from N to P or cause an intensification of P limitation in formerly pristine areas. Small changes in nutrient supply in oligotrophic lakes and rivers could lead to large changes in relative plant growth and yield with possible knock on effects on ecosystem carbon cycling through changes in the decomposition rate of their tissue. Previous biogeographical studies have shown inconsistent responses of plant nutrient tissue content and stoichiometry (functional traits) to external nutrient availability. Here we used a single species, Juncus bulbosus, to test the interplay between plant tissue nutrient (content and stoichiometry) and external environmental factors (local and catchment scale). We developed a comparative approach applicable globally to assess the thresholds for nutrient limitation in aquatic plants in the wild. Phosphorus in Juncus bulbosus tissue was negatively related to sediment organic matter (Fe root plaque limiting P uptake) and catchment vegetation cover (less P leaching to lakes). Our comparative approach revealed that the lack of increase in N plant tissue along the strong gradient in external N concentration may be explained by P limitation and strict plant tissue N:P ratio. Our comparative approach further showed that the nutrient content and stoichiometry of Juncus bulbosus was similar to other submerged aquatic plants growing in nutrient poor aquatic ecosystems. In southern Norway, mass development of Juncus bulbosus may be primarily triggered by changes in P availability, rather than CO2 or inorganic N, as previously thought, although co-limitations are also possible. If so, the mass development of Juncus bulbosus in oligotrophic aquatic ecosystems could be an early indicator of increasing P fluxes through these ecosystems which are less limited by N due to high atmospheric N deposition.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.titleFunctional biogeography: Stoichiometry and thresholds for interpreting nutrient limitation in aquatic plantsnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.rights.holder© 2019 The Authorsnb_NO
dc.source.pagenumber447-455nb_NO
dc.source.volume677nb_NO
dc.source.journalScience of the Total Environmentnb_NO
dc.identifier.doi10.1016/j.scitotenv.2019.04.366
dc.identifier.cristin1709401
cristin.unitcode7464,30,19,0
cristin.unitnameFerskvannsøkologi
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal