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“decrease in density”

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Association 1001

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Associationauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

Higher shrub density appeared to decrease ephemeral biomass productivity and density.

Taxon: ephemerale0
Interactor: shrube0other
Outcome: biGmass productivity and densitye0
Direction: decreasee0
Qualifier: appearse0

Verbatim

e0
“Higher shrub density associated with increased elevation appears to decrease both ephemeral biGmass productivity and density”
✓ located verbatim in the source · abstract, characters 141–265

Title

Productivity and Flowering of Winter Ephemerals in Relation to Sonoran Desert Shrubs

William L. Halvorson; Duncan T. Patten The American Midland Naturalist 1975. doi:10.2307/2424164

Other claims from this paper (5)

Association Ephemeral biomass and density varied with shrub canopy type and density.
Association Shrub canopy enhanced ephemeral growth when it was not too dense or low-hanging.
Observation Ephemerals germinated early in the cool season.
Observation Ephemerals had low tolerance to heat.
Observation Ephemerals flowered earlier than shrubs and succulents.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Small disturbances caused a marked decrease in species density.

Taxon: vascular plantsTracheophytae1
Treatment: Small disturbancese0
Outcome: species densitye0
Direction: decreasee0

Verbatim

e0
“Small disturbances cause a remarkable decrease in species density.”
✓ located verbatim in the source · abstract, characters 618–684

e1
“vascular plants”
✓ located verbatim in the source · abstract, characters 85–100

Title

High species richness in an Estonian wooded meadow

Kalevi Kull; Martin Zobel Journal of Vegetation Science 1991. doi:10.2307/3236182

Other claims from this paper (9)

Observation Maximum vascular plant richness reached 25 species in a 10 cm x 10 cm plot.
Observation Maximum vascular plant richness reached 42 species in a 20 cm x 20 cm plot.
Observation Maximum vascular plant richness reached 63 species in a 1 m 2 plot.
Association Species richness was highest where long-term mowing was most regular.
Association Fertilization was associated with lower species density.
Association Temporary cessation of mowing was associated with lower species density.
Observation The richest community had a leaf area index of 2.8.
Observation The richest community had above-ground dry biomass of 175 g/m 2.
Association Species number decreased as herb layer height increased.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Seed cotton yield tended to decrease as weed density increased.

Taxon: cottonGossypium hirsutumt0
Treatment: weed densitye0
Interactor: Goosegrasst1weed
Outcome: Seed cotton yielde0
Direction: decreasee0

Verbatim

e0
“Seed cotton yield tended to decrease with the increase in weed density”
✓ located verbatim in the source · abstract, characters 379–449

t0
“cotton”
✓ located verbatim in the source · title, characters 48–54

t1
“Goosegrass”
✓ located verbatim in the source · title, characters 0–10

Title

Goosegrass (Eleusine indica) density effects on cotton (Gossypium hirsutum)

Xiao-yan MA; Han-wen WU; Wei-li JIANG; et al. Journal of Integrative Agriculture 2015. doi:10.1016/s2095-3119(15)61058-9

Other claims from this paper (10)

Intervention effect Goosegrass at 4 plants per metre of row significantly reduced cotton yield by 20 to 27%.
Intervention effect The regression model predicted a 50% cotton yield loss at 11.6–19.2 goosegrass plants per metre of row.
Intervention effect Boll production was unaffected in the early growing season.
Intervention effect At 4 plants per metre of row, boll numbers per cotton plant fell about 25% late in the growing season.
Intervention effect Cotton boll weight and seed numbers per boll were significantly reduced by 8% at 4 goosegrass plants per metre of row.
Intervention effect Cotton height, stem diameter and sympodial branch number were less affected than yield by goosegrass competition.
Intervention effect Seed index, lint percentage and lint fiber properties were unaffected by weed competition.
Association Intraspecific competition produced density-dependent goosegrass biomass per plant of 142–387 g dry weight at harvest.
Association Goosegrass biomass per square metre tended to increase quadratically with weed density.
Recommendation The authors conclude that effective goosegrass management is needed to protect cotton yield.

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“decrease in density”

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Association 1001