Dwarf Shrubs Are Stronger Competitors than Graminoid Species at High Nutrient Supply in Peat Bogs

Climate warming is likely to increase nutrient mineralization rates in bog ecosystems which may change the plant species composition. We examined the competitive relationships between two graminoid species, Eriophorum vaginatum and Rhynchospora alba, and two ericoid species, Calluna vulgaris and Vac... Ausführliche Beschreibung

1. Person: Kool, Ada
Weitere Personen: Heijmans, Monique M. P. D. verfasserin
Quelle: in Plant ecology : an international journal Vol. 204, No. 1 (2009), p. 125-134
Weitere Artikel
Format: Online-Artikel
Sprache: English
Veröffentlicht: 2009
Beschreibung: Online-Ressource
Schlagworte: research-article
Climate warming
Competition
Ericoids
Mire vegetation
Nitrogen deposition
Peatlands
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Anmerkung: Copyright: Copyright 2009 Springer
Zusammenfassung: Climate warming is likely to increase nutrient mineralization rates in bog ecosystems which may change the plant species composition. We examined the competitive relationships between two graminoid species, Eriophorum vaginatum and Rhynchospora alba, and two ericoid species, Calluna vulgaris and Vaccinium oxycoccus, at different nutrient supply rates. In a greenhouse, the plants were grown in monocultures and mixtures at four nutrient treatments: control, high N, high P, and high N + P. The results show that the ericoids responded more strongly to the nutrient treatments than the graminoids. The dwarf shrubs showed higher growth rates and reduced root: shoot ratio at high N + P supply. When grown in mixture the ericoids increased their growth, while graminoids decreased in biomass or showed signs of nutrient limitation compared to their monoculture plants. This suggests that under increased nutrient availability, bogs are more likely to turn into dwarf shrub dominated ecosystems and not grassland.
ISSN: 1573-5052

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