Nutrient limitation and nutrient-driven shifts in plant species composition in a species-rich fen meadow
| Jazyk: | angličtina |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
peat soils
enrichment tundra biomassa availability soortendiversiteit Plant Ecology and Nature Conservation netherlands natuurreservaten laagveengebieden fens complex mixtures nitrogen diversity nederland flooding vegetation veengronden mineral-nutrition phosphorus plant ecology WIMEK biomass species diversity nature reserves wild plants inundatie eutrophication stikstof plantenecologie community Plantenecologie en Natuurbeheer gelderland eutrofiëring |
| Zdroj: | Journal of Vegetation Science. 15:389-396 |
| ISSN: | 1100-9233 |
| Popis: | Question: We studied the development and persistence of the effects of nutrient pulses on biomass production and species composition in a fen meadow. Location: Nature reserve, central Netherlands, 5 m a.s.l. Methods: Single pulse fertilization with N and P in a factorial design on an undrained central and a drained margin site in a species-rich fen meadow (Cirsio dissecti-Molinietum). Biomass production and species composition were monitored during four years. Results: At the central site, N addition boosted biomass production, but only during one year. The species composition was not changed. P fertilization increased the biomass production and changed the species composition from a vegetation dominated by Carex panicea to a grassland community with abundant Holcus lanatus, but not before the second year. At the margin site, P fertilization changed the species composition in a similar way, but biomass production was not increased. N fertilization had no effect. At both sites the P induced shift in species composition persisted for four years although the P effect declined during the experiment. Conclusions: The biomass responses show that N was limiting in the central site. Another nutrient, besides N and P (probably K) must have been limiting in the marginal site. The fast decline of the N effect on biomass is ascribed to increased denitrification and biomass removal. The delay in the P effect on biomass and species composition and the persistence of the P effect on species composition are ascribed to fast immobilisation and subsequent slow release of fertilizer P in the peat soil. Recurrence of the P pulses is expected to cause permanent changes in species composition |
| Databáze: | OpenAIRE |
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