Abstract
In many terrestrial ecosystems elevated atmospheric carbon dioxide (CO 2 ) may reduce plant quality and change plant-herbivore interactions. The objective of this study was to evaluate the effects of elevated CO 2 (600 ppm vs. 350 ppm) on white clover (Trifolium repens L.) and to examine the feeding response and growth of juveniles of the helicid land snail Arianta arbustorum (L.). Leaves of T. repens grown at elevated atmospheric CO 2 had a lower nitrogen concentration and a lower specific leaf area than leaves grown under ambient CO 2 conditions. However, elevated CO 2 had no effect on leaf carbon concentration. Juvenile snails fed on either diet consumed about the same amount of leaf biomass. The lower leaf nitrogen concentration at elevated CO 2 resulted in a reduced nitrogen uptake. As a consequence, juvenile A. arbustorum, fed on T. repens grown under elevated CO 2 , tended to grow more slowly than snails fed on T. repens leaves produced under ambient CO 2 . This indicates that rising atmospheric CO 2 can indirectly affect the life cycle of terrestrial gastropods.
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Claims 6
Claim · model-written summary
Leaves of white clover grown at elevated CO2 had a lower nitrogen concentration than leaves under ambient CO2.
- Taxon
- Trifolium repens
Trifolium repenst1 - Treatment
- elevated atmospheric CO 2e1
- Outcome
- nitrogen concentratione1
- Direction
- lowere1
- Comparator
- ambient CO 2 conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t1“Growth of juvenile Arianta arbustorum (Linnaeus, 1758) fed on White Clover (Trifolium repens L.) grown under ambient or elevated atmospheric CO2”
e1“Leaves of T. repens grown at elevated atmospheric CO 2 had a lower nitrogen concentration and a lower specific leaf area than leaves grown under ambient CO 2 conditions.”
Claim · model-written summary
Leaves of white clover grown at elevated CO2 had a lower specific leaf area than leaves under ambient CO2.
- Taxon
- Trifolium repens
Trifolium repenst1 - Treatment
- elevated atmospheric CO 2e1
- Outcome
- specific leaf areae1
- Direction
- lowere1
- Comparator
- ambient CO 2 conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t1“Growth of juvenile Arianta arbustorum (Linnaeus, 1758) fed on White Clover (Trifolium repens L.) grown under ambient or elevated atmospheric CO2”
e1“Leaves of T. repens grown at elevated atmospheric CO 2 had a lower nitrogen concentration and a lower specific leaf area than leaves grown under ambient CO 2 conditions.”
Claim · model-written summary
Elevated CO2 had no effect on leaf carbon concentration of white clover.
- Taxon
- Trifolium repens
Trifolium repenst1 - Treatment
- elevated CO 2e2
- Outcome
- leaf carbon concentratione2
- Direction
- no effecte2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t1“Growth of juvenile Arianta arbustorum (Linnaeus, 1758) fed on White Clover (Trifolium repens L.) grown under ambient or elevated atmospheric CO2”
e2“However, elevated CO 2 had no effect on leaf carbon concentration.”
Claim · model-written summary
Juvenile Arianta arbustorum consumed about the same amount of leaf biomass on white clover grown under elevated and ambient CO2.
- Taxon
- Trifolium repens
Trifolium repenst1 - Treatment
- elevated CO 2 (600 ppm vs. 350 ppm)e0
- Interactor
- Arianta arbustorum
Arianta arbustorume0herbivore
- Outcome
- leaf biomasse3
- Direction
- about the same amounte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t1“Growth of juvenile Arianta arbustorum (Linnaeus, 1758) fed on White Clover (Trifolium repens L.) grown under ambient or elevated atmospheric CO2”
e0“The objective of this study was to evaluate the effects of elevated CO 2 (600 ppm vs. 350 ppm) on white clover (Trifolium repens L.) and to examine the feeding response and growth of juveniles of the helicid land snail Arianta arbustorum (L.).”
e3“Juvenile snails fed on either diet consumed about the same amount of leaf biomass.”
Claim · model-written summary
The lower leaf nitrogen concentration at elevated CO2 was associated with reduced nitrogen uptake by juvenile snails.
- Taxon
- Trifolium repens
Trifolium repenst1 - Treatment
- lower leaf nitrogen concentratione4
- Interactor
- Arianta arbustorum
Arianta arbustorume0herbivore
- Outcome
- nitrogen uptakee4
- Direction
- reducede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t1“Growth of juvenile Arianta arbustorum (Linnaeus, 1758) fed on White Clover (Trifolium repens L.) grown under ambient or elevated atmospheric CO2”
e0“The objective of this study was to evaluate the effects of elevated CO 2 (600 ppm vs. 350 ppm) on white clover (Trifolium repens L.) and to examine the feeding response and growth of juveniles of the helicid land snail Arianta arbustorum (L.).”
e4“The lower leaf nitrogen concentration at elevated CO 2 resulted in a reduced nitrogen uptake.”
Claim · model-written summary
Juvenile Arianta arbustorum fed on white clover grown under elevated CO2 tended to grow more slowly than snails fed on leaves under ambient CO2.
- Taxon
- Trifolium repens
Trifolium repenst1 - Treatment
- elevated CO 2e5
- Interactor
- A. arbustorum
Arianta arbustorume5herbivore
- Outcome
- growe5
- Direction
- more slowlye5
- Comparator
- ambient CO 2e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t1“Growth of juvenile Arianta arbustorum (Linnaeus, 1758) fed on White Clover (Trifolium repens L.) grown under ambient or elevated atmospheric CO2”
e0“The objective of this study was to evaluate the effects of elevated CO 2 (600 ppm vs. 350 ppm) on white clover (Trifolium repens L.) and to examine the feeding response and growth of juveniles of the helicid land snail Arianta arbustorum (L.).”
e5“As a consequence, juvenile A. arbustorum, fed on T. repens grown under elevated CO 2 , tended to grow more slowly than snails fed on T. repens leaves produced under ambient CO 2 .”
The same questions in other papers
co2 · molecular: metabolites · Trifolium repens (white clover)Positive and negative results
1 in the opposite direction
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.