Search claims · PlantClaims

Associationobservedoriginal resultmeasured

Claim · model-written summary

Seed bank density tended to decrease in high-light environments.

Taxon: forest seed banke0
Treatment: high-light environmentse3
Outcome: seed bank densitye3
Direction: decreasee3

Verbatim

e0
“assess the degree of variation in forest seed bank characteristics”
✓ located verbatim in the source · abstract, characters 167–233

e3
“The seed bank density tended to decrease in high-light environments”
✓ located verbatim in the source · abstract, characters 990–1057

Title

Seed bank heterogeneity and its association with vegetation and micro-environmental variables in a secondary forest in Kyoto city, Japan

Koji KAWAMURA; Keita NAKAHIRA; Hideo UEDA Journal of the Japanese Society of Revegetation Technology 2018. doi:10.7211/jjsrt.44.340

Other claims from this paper (8)

Associationobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

The increase in mid-grass composition was associated with a significant decrease in total plant density.

Taxon: herbaceous vegetationt0
Treatment: mid‐grass compositione6
Outcome: total plant densitye6
Direction: decreasee6

Verbatim

t0
“Herbaceous vegetation change in variable rangeland environments”
✓ located verbatim in the source · title, characters 0–63

e6
“The increase in mid‐grass composition was associated with a significant decrease in total plant density”
✓ located verbatim in the source · abstract, characters 1177–1280

Title

Herbaceous vegetation change in variable rangeland environments: The relative contribution of grazing and climatic variability

Samuel D. Fuhlendorf; David D. Briske; Fred E. Smeins Applied Vegetation Science 2001. doi:10.1111/j.1654-109x.2001.tb00486.x

Other claims from this paper (11)

Associationhypothesisoriginal resultmeasured

Claim · model-written summary

Spotted knapweed density may not decrease significantly until the seed bank falls below a critical threshold.

Taxon: Spotted knapweede7
Outcome: densitye7
Direction: may not decrease significantlye7
Comparator: critical thresholde7

Verbatim

t0
“Spotted Knapweed”
✓ located verbatim in the source · title, characters 62–78

e7
“Spotted knapweed density may not decrease significantly until the seed bank falls below a critical threshold”
✓ located verbatim in the source · abstract, characters 1479–1587

Title

Influence of Seed Head–Attacking Biological Control Agents on Spotted Knapweed Reproductive Potential in Western Montana Over a 30-Year Period

Jim M. Story; Lincoln Smith; Janelle G. Corn; et al. Environmental Entomology 2008. doi:10.1603/0046-225x(2008)37[510:ioshbc]2.0.co;2

Other claims from this paper (11)

Associationobservedoriginal resultsimulated

Claim · model-written summary

Population growth of the two herbaceous species may decrease slightly as local available seed density increases, according to the models.

Taxon: two herbaceous speciese2
Treatment: local available seed densitye4
Outcome: population growthe4
Direction: decreasee4
Qualifier: may decrease slightlye4

Verbatim

e2
“We evaluated the eff ect of seed density on the seed dynamics of two herbaceous species”
✓ located verbatim in the source · abstract, characters 335–422

e4
“Models with dynamics changing with time-since-disturbance for both species predicted that population growth may decrease slightly if local available seed density increases”
✓ located verbatim in the source · abstract, characters 1256–1427

Title

Eff ects of habitat degradation, microsite, and seed density on the persistence of two native herbs in a

Elizabeth L. Stephens; Pedro F. Quintana‐Ascencio 2015

Other claims from this paper (5)

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Soil seed-bank density and Shannon-Wiener diversity tended to decrease with greater fertilization.

Treatment: fertilizatione0
Outcome: density and Shannon-Wiener diversity indexe0
Direction: decreasee0

Not reportedTaxon

Verbatim

e0
“for soil seed bank,density and Shannon-Wiener diversity index tended to decrease,and Simpson dominance index tended to increase with the enhancement of fertilization”
✓ located verbatim in the source · abstract, characters 1278–1443

Title

Effects of long-term different fertilization on weeds seed bank and community in paddy fields in winter fallow season

Wang Fei Soil and Environmental Sciences 2013

Other claims from this paper (11)

Observation The soil seed bank contained 16 weed species.
Observation Field communities contained 10 weed species.
Association Seed-bank and field-weed community similarity indexes exceeded 0.6 and tended to decline with greater fertilization.
Association Soil seed-bank Simpson dominance tended to increase with greater fertilization.
Association Field-weed Simpson dominance significantly increased with greater fertilization.
Association Field-weed Shannon-Wiener diversity significantly decreased with greater fertilization.
Association Field-weed species richness and evenness tended to decline with greater fertilization.
Association Field-weed density tended to rise with greater fertilization.
Intervention effect Balanced NPK fertilization suppressed weeds.
Intervention effect Organic material application suppressed weeds.
Intervention effect Combined NPK and OM gave better weed suppression and harvest.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Restoration treatments caused an decrease in upper peat bulk density.

Treatment: restoration treatmentse0
Outcome: bulk densitye0
Direction: decreasee0
Qualifier: upper peate0

Not reportedTaxonComparator

Verbatim

e0
“The restoration treatments resulted in a decrease in bulk density and increase in water content of the upper peat, probably due to an unloading effect caused by the raised water table buoying up the drained peat layer.”
✓ located verbatim in the source · abstract, characters 1780–1998

Title

Ten-year results of a comparison of methods for restoring afforested blanket bog

R. Anderson; A. Peace Mires and Peat 2017. doi:10.19189/map.2015.omb.214

Other claims from this paper (15)

Intervention effect Felling combined with furrow damming raised the water table most successfully.
Intervention effect The water table continued to recover from years 5 to 10 only with felling and damming.
Observation Water level rose close to the non-afforested reference bog over ten years.
Observation Water level rose rapidly at first and then improved only slightly.
Intervention effect Felling shifted vegetation species composition toward the reference bogs.
Observation Vegetation became more dissimilar to reference bog first five years.
Observation Vegetation became more similar to reference bog after Year 5.
Intervention effect Damming furrows had little effect on vegetation overall.
Intervention effect Damming combined with felling increased vegetation differentiation by ground position.
Observation Conifer seedlings established most densely next to standing forest.
Observation Conifer seedling density and growth were similar in all felled treatments.
Intervention effect Restoration treatments caused an increase in upper peat water content.
Mechanism Removing tree weight amplified the peat response in some treatments.
Intervention effect Damming furrows raised ground surface height by 5–7 cm.
Mechanism Bog subsidence from consolidation and compression may be partly reversible.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Higher density decreased stem density in the top layer.

Taxon: Abutilon theophrastiAbutilon theophrastit0
Organ / stage: top layere0
Outcome: stem densitye0
Direction: decreasee0

Not reportedTreatmentComparator

Verbatim

e0
“a decrease in stem density in the top layer”
✓ located verbatim in the source · abstract, characters 1024–1067

t0
“Abutilon theophrasti”
✓ located verbatim in the source · title, characters 62–82

Title

Architectural plasticity in response to population density in Abutilon theophrasti (Malvaceae)

Shu Wang; Dao‐Wei Zhou Ecological Research 2022. doi:10.1111/1440-1703.12284

Other claims from this paper (7)

Intervention effect Higher density reduced trait variation among layers.
Intervention effect Higher density increased stem mass in layers three through five.
Intervention effect Higher density increased top-layer stem diameter.
Intervention effect Higher density increased stem density in lower layers.
Observation Petiole length and mass, lamina size, and leaf number increased in upper layers.
Observation Petiole length and mass, lamina size, and leaf number decreased in lower layers.
Mechanism The authors infer trade-offs between upper and lower layers in stem density and leaf traits in dense populations.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Higher temperatures caused a small decrease in Euphrasia population density over three seasons.

Taxon: Euphrasia frigidaEuphrasia frigidat0
Treatment: Higher temperaturese0
Outcome: population densitiese0
Direction: decreasee0
Qualifier: during three seasonse0

Not reportedComparator

Verbatim

e0
“Higher temperatures resulted in a small decrease in population densities during three seasons.”
✓ located verbatim in the source · abstract, characters 337–431

t0
“Euphrasia frigida”
✓ located verbatim in the source · title, characters 129–146

Title

Effects of Temperature and Natural Disturbance on Growth, Reproduction, and Population Density in the Alpine Annual Hemiparasite Euphrasia frigida

Jorun Nyléhn; Ørjan Totland Arctic Antarctic and Alpine Research 1999. doi:10.1080/15230430.1999.12003307

Other claims from this paper (6)

Intervention effect Experimental warming significantly increased Euphrasia growth and seed production.
Association Natural disturbance did not influence Euphrasia growth and seed production.
Association Euphrasia population density peaked at intermediate disturbance.
Mechanism Authors suggest warming effects on hemiparasites may be mediated by improved host conditions.
Observation Authors hypothesize global warming will increase Euphrasia seed output.
Observation Authors project Euphrasia population density will decrease under warming.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Seed bank density tended to decrease with elevation on both shady and sunny slopes.

Outcome: soil seed banke0
Direction: decreasee0
Setting: shady slope and sunny slopee0

Not reportedTaxon

Verbatim

e0
“soil seed bank to decrease in density with increasing elevation in both shady slope and sunny slope”
✓ located verbatim in the source · abstract, characters 986–1085

Title

Persistent soil seed banks along altitudinal gradients in the Qilian Mountains in China and their significance for conservation management

Qiuyan Li; Haiyan Fang; Cai Qiang-guo African Journal of Agricultural Research 2011. doi:10.5897/ajar10.1099

Other claims from this paper (12)

Observation Seed density was highest in summit plain grassland at 3946 seeds m(-2).
Observation Seed density was lowest in shady slope dwarf scrub grassland at 225 seeds m(-2).
Observation Species number was highest in sunny slope grassland, with 21 species per 962 cm(2).
Observation Species number was lowest in shady slope scrub land, with 5 species per 962 cm(2).
Observation Annuals comprised 18% of species.
Observation Perennial herbs comprised 73% of species.
Observation Only one Salix gilashanica shrub was recorded.
Observation Seeds were concentrated in the upper 0 to 5 cm layer.
Observation Seed density declined by 71.10% in the lower 5 to 10 cm layer.
Observation Similarity between the soil seed bank and vegetation was very low across seven habitats.
Observation Picea crassifolia was absent from the persistent seed bank despite prominence in woodland surface vegetation.
Recommendation The authors recommend maintaining existing vegetation.

Mechanismauthor interpretationoriginal resultpositivemeasured

Claim · model-written summary

Increased density of vegetative shoots can compensate for the decrease in shoot height under grazing.

Taxon: Artemisia frigidaArtemisia frigidae0
Outcome: height of shootse1
Qualifier: increase of density of vegetative shootse1

Verbatim

e0
“The experimental plant materials Artemisia frigida”
✓ located verbatim in the source · abstract, characters 78–128

e1
“The increase of density of vegetative shoots can compensate for the decrease of height of shoots”
✓ located verbatim in the source · abstract, characters 1123–1219

Title

Changes of model of Atemisia frigida populations under the disturbance of grazing

Wang Jing; Yang Chi; Tie Wang Acta Ecologica Sinica 2006

Other claims from this paper (9)

“decrease in density”

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