Abstract
Saxifraga oppositifolia, a widespread circum‐arctic and alpine plant species, was exposed to increased temperature at three ITEX sites of different latitudes: Val Bercla in the Swiss Alps (46°N), Latnjajaure in mid‐alpine Northern Sweden (68°N), and Alexandra Fjord, Ellesmere Island (79°N) in the Canadian High Arctic. Phenology, growth, and reproduction were monitored for 2 or 3 consecutive years. Increased temperature had little influence on the phenology of S. oppositifolia , although flowering period was somewhat longer and pollination earlier in the experimental plots. A decrease in the density of flowers on each plant was noted at two sites over 3 years, with a slightly larger decrease in the warmed plots. The few changes observed in reproductive variables (e.g. fruit : flower ratio) are mostly assigned to increased shading by taller growing neighbouring plants of other species, thus limiting performance of the shade‐intolerant S. oppositifolia . It is assumed that survival of this species, especially at the lower limits of its altitudinal and latitudinal distribution, will depend on seed dispersal to new, open habitats.
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Claims 5
Claim · model-written summary
Warming had little effect on S. oppositifolia phenology.
- Taxon
- S. oppositifolia
.jpg?width=60)
Saxifraga oppositifoliae0 - Treatment
- Increased temperaturee0
- Outcome
- phenologye0
- Direction
- little influencee0
- Comparator
- experimental plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Increased temperature had little influence on the phenology of S. oppositifolia , although flowering period was somewhat longer and pollination earlier in the experimental plots.”
Claim · model-written summary
Flowering lasted somewhat longer in warmed plots.
- Taxon
- S. oppositifoliaSaxifraga oppositifoliae0
- Treatment
- Increased temperaturee0
- Outcome
- flowering periode0
- Direction
- longere0
- Comparator
- experimental plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased temperature had little influence on the phenology of S. oppositifolia , although flowering period was somewhat longer and pollination earlier in the experimental plots.”
Claim · model-written summary
Pollination occurred earlier in warmed plots.
- Taxon
- S. oppositifoliaSaxifraga oppositifoliae0
- Treatment
- Increased temperaturee0
- Outcome
- pollinatione0
- Direction
- earliere0
- Comparator
- experimental plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased temperature had little influence on the phenology of S. oppositifolia , although flowering period was somewhat longer and pollination earlier in the experimental plots.”
Claim · model-written summary
Flower density decreased at two sites over three years, somewhat more in warmed plots.
- Treatment
- warmed plotse0
- Outcome
- density of flowerse0
- Direction
- decreasee0
- Qualifier
- at two sites over 3 yearse0
Not reportedTaxonComparator
Verbatim
e0“A decrease in the density of flowers on each plant was noted at two sites over 3 years, with a slightly larger decrease in the warmed plots.”
Claim · model-written summary
Authors attributed the few reproductive changes chiefly to shade from taller neighboring species.
- Taxon
- S. oppositifoliaSaxifraga oppositifoliae0
- Outcome
- reproductive variablese0
- Direction
- limitinge0
- Qualifier
- increased shading by taller growing neighbouring plants of other speciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The few changes observed in reproductive variables (e.g. fruit : flower ratio) are mostly assigned to increased shading by taller growing neighbouring plants of other species, thus limiting performance of the shade‐intolerant S. oppositifolia .”