Dominance hierarchies, diversity and species richness of vascular plants in an alpine meadow: Contrasting short and medium termresponses to simulated global change

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Dominance hierarchies, diversity and species richness of vascular plants in an alpine meadow: Contrasting short and medium termresponses to simulated global change

Alatalo, Juha M. (författare): Uppsala universitet,Växtekologi och evolution,Uppsala universitet, Växtekologi och evolution

Little, C. J. (författare): Uppsala universitet,Växtekologi och evolution,Uppsala universitet, Växtekologi och evolution

Jägerbrand, Annika, 1972- (författare): Statens väg- och transportforskningsinstitut,Miljö, MILJÖ,Statens väg- och transportforskningsinstitut, Miljö, MILJÖ,VTI, Swedish National Road and Transport Research Institute, Stockholm, Sweden

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Molau, Ulf, 1951 (författare): Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences,Göteborgs Universitet,Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Sweden

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2014-05-22
2014
Engelska.
Ingår i: PeerJ. - : PeerJ Inc.. - 2167-8359. ; 2014:1

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Abstract Ämnesord

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We studied the impact of simulated global change on a high alpine meadow plant community. Specifically, we examined whether short-term (5 years) responses are good predictors for medium-term (7 years) changes in the system by applying a factorial warming and nutrient manipulation to 20 plots in Latnjajaure, subarctic Sweden. Seven years of experimental warming and nutrient enhancement caused dramatic shifts in dominance hierarchies in response to the nutrient and the combined warming and nutrient enhancement treatments. Dominance hierarchies in the meadow moved from a community being dominated by cushion plants, deciduous, and evergreen shrubs to a community being dominated by grasses, sedges, and forbs. Short-termresponses were shown to be inconsistent in their ability to predict medium-term responses for most functional groups, however, grasses showed a consistent and very substantial increase in response to nutrient addition over the seven years. The non-linear responses over time point out the importance of longer-term studies with repeated measurements to be able to better predict future changes. Forecasted changes to temperature and nutrient availability have implications for trophic interactions, and may ultimately influence the access to and palatability of the forage for grazers. Depending on what anthropogenic change will be most pronounced in the future (increase in nutrient deposits, warming, or a combination of them both), different shifts in community dominance hierarchies may occur. Generally, this study supports the productivity-diversity relationship found across arctic habitats, with community diversity peaking in mid-productivity systems and degrading as nutrient availability increases further. This is likely due the increasing competition in plant-plant interactions and the shifting dominance structure with grasses taking over the experimental plots, suggesting that global change could have high costs to biodiversity in the Arctic. © 2014 Alatalo et al.

Ämnesord

NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
NATURVETENSKAP -- Biologi -- Botanik (hsv//swe)
NATURAL SCIENCES -- Biological Sciences -- Botany (hsv//eng)
NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
NATURVETENSKAP -- Biologi -- Evolutionsbiologi (hsv//swe)
NATURAL SCIENCES -- Biological Sciences -- Evolutionary Biology (hsv//eng)

Nyckelord

Alpine tundra
Arctic
Climate change
Functional groups
Global change
Meadow
Nutrient addition
Plant community diversity
Species richness
Warming
article
biodiversity
deciduous plant
ecological phenomena and functions
ecology
evergreen
grass
greenhouse effect
nonhuman
plant nutrition
plant plant interaction
simulation
Sweden
temperature
vascular plant
Vegetation
U Science

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Av författaren/redakt...: Alatalo, Juha M.; Little, C. J.; Jägerbrand, Anni ...; Molau, Ulf, 1951

Om ämnet

NATURVETENSKAP: NATURVETENSKAP; och Biologi; och Ekologi

NATURVETENSKAP: NATURVETENSKAP; och Biologi; och Botanik

NATURVETENSKAP: NATURVETENSKAP; och Geovetenskap och ...; och Miljövetenskap

NATURVETENSKAP: NATURVETENSKAP; och Biologi; och Evolutionsbiolog ...

Artiklar i publikationen: PeerJ

Av lärosätet: Göteborgs universitet; VTI - Statens väg- och transportforskningsinstitut; Jönköping University; Uppsala universitet; Högskolan i Gävle

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