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Cascading effects o...
Cascading effects of earthworm invasion increase graminoid density and rodent grazing intensities
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- Jonsson, Hanna (författare)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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- Olofsson, Johan (författare)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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- Blume-Werry, Gesche, 1985- (författare)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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- Klaminder, Jonatan, 1976- (författare)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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(creator_code:org_t)
- The Ecological Society of America, 2024
- 2024
- Engelska.
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Ingår i: Ecology. - : The Ecological Society of America. - 0012-9658 .- 1939-9170. ; 105:2
- Relaterad länk:
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https://doi.org/10.1...
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https://umu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Human-mediated dispersal of non-native earthworms can cause substantial changes to the functioning and composition of ecosystems previously earthworm-free. Some of these earthworm species have the potential to “geoengineer” soils and increase plant nitrogen (N) uptake. Yet the possible consequences of increased plant N concentrations on rodent grazing remains poorly understood. In this study, we present findings from a common garden experiment with two tundra communities, meadow (forb dominated) and heath (shrub dominated), half of them subjected to 4 years of earthworm presence (Lumbricus spp. and Aporrectodea spp.). Within four summers, our earthworm treatment changed plant community composition by increasing graminoid density by, on average, 94% in the heath vegetation and by 49% in the meadow. Rodent winter grazing was more intense on plants growing in soils with earthworms, an effect that coincided with higher N concentrations in plants, indicating a higher palatability. Even though earthworms reduced soil moisture, plant community productivity, as indicated by vegetation greenness (normalized difference vegetation index), was not negatively impacted. We conclude that earthworm-induced changes in plant composition and trophic interactions may fundamentally alter the functioning of tundra ecosystems.
Ämnesord
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Nyckelord
- earthworms
- grazing
- Lumbricidae
- non-native
- plant community
- soil moisture
- tundra
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Ecology
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