Abstract
The pattern of resource allocation in Chamaesyce hirta was significantly affected by both density and nutrient availability. Increased intraspecific competition and decreased nutrient levels produced decreases in the proportion of total plant energy allocated to repro- ductive tissues in all units tested. A 32-fold increase in density diminished reproductive effort by one-third and an 8-fold decrease in nutrient levels diminished reproductive effort by one- half. These results are in agreement with theoretical predictions that for a resource-limited population, reproductive effort should decrease with decreasing resource availability. Increased root growth seemed to be inversely related to reproductive effort.
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Claims 6
Claim · model-written summary
Density and nutrient availability significantly affected resource allocation.
- Taxon
- Chamaesyce hirta
_I.jpg?width=60)
Euphorbia hirtae0 - Treatment
- density and nutrient availabilitye0
- Outcome
- resource allocatione0
- Direction
- affectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_I.jpg?width=500)
Verbatim
e0“The pattern of resource allocation in Chamaesyce hirta was significantly affected by both density and nutrient availability.”
Claim · model-written summary
Increased competition reduced allocation to reproductive tissues.
- Treatment
- Increased intraspecific competitione0
- Outcome
- proportion of total plant energy allocated to repro- ductive tissuese0
- Direction
- decreasese0
- Qualifier
- in all units testede0
Not reportedTaxonComparator
Verbatim
e0“Increased intraspecific competition and decreased nutrient levels produced decreases in the proportion of total plant energy allocated to repro- ductive tissues in all units tested.”
Claim · model-written summary
Reduced nutrients reduced allocation to reproductive tissues.
- Treatment
- decreased nutrient levelse0
- Outcome
- proportion of total plant energy allocated to repro- ductive tissuese0
- Direction
- decreasese0
Not reportedTaxonComparator
Verbatim
e0“Increased intraspecific competition and decreased nutrient levels produced decreases in the proportion of total plant energy allocated to repro- ductive tissues in all units tested.”
Claim · model-written summary
A 32-fold density increase diminished reproductive effort by one-third.
- Treatment
- 32-fold increase in densitye0
- Outcome
- reproductive efforte0
- Direction
- diminishede0
- Value
- one-thirde0
Not reportedTaxonComparator
Verbatim
e0“A 32-fold increase in density diminished reproductive effort by one-third”
Claim · model-written summary
An 8-fold nutrient decrease diminished reproductive effort by one-half.
- Treatment
- 8-fold decrease in nutrient levelse0
- Outcome
- reproductive efforte0
- Direction
- diminishede0
- Value
- one- halfe0
Not reportedTaxonComparator
Verbatim
e0“an 8-fold decrease in nutrient levels diminished reproductive effort by one- half”
Claim · model-written summary
Greater root growth appeared inversely related to reproductive effort.
Not reportedTaxon
Verbatim
e0“Increased root growth seemed to be inversely related to reproductive effort.”