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“decrease in density”

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2000 ’10 ’20

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Taxon: forest ✕

Taxon groups are the verbatim names found in the abstracts (case-insensitive), not normalised: maize, corn and Zea mays are separate groups here. The Organism view merges them through NCBI Taxonomy.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Trunk density declined further by 2003.

Taxon: Forestt0
Outcome: trunk densitye0
Direction: decreasee0
Setting: Masoala Peninsulat0

Verbatim

t0
“Forest of Masoala Peninsula, Madagascar”
✓ located verbatim in the source · title, characters 36–75

e0
“a further decrease in trunk density, an increase in the frequency of herbs and woody pioneers, a decrease in the frequency of liana and saplings of primary forest trees in the “shrub layer”, and an increase of vegetation in the “shrub layer” but decrease of vegetation in the “canopy layer”.”
✓ located verbatim in the source · abstract, characters 1452–1743

Title

The Effects of Cyclone Hudah on the Forest of Masoala Peninsula, Madagascar

C Birkinshaw; M Randrianjanahary Madagascar Conservation & Development 2009. doi:10.4314/mcd.v2i1.44125

Other claims from this paper (19)

Observation Satellite images showed severe damage to 3% of the forest.
Observation In the northeast, 22% of forest was severely damaged.
Observation Tree death reached up to 53% of trunks in a plot.
Observation Trunk basal area fell to 64%.
Observation Uprooting reached 46%.
Observation Trunk snapping reached 51%.
Observation Crown volume fell to a mean of 83%.
Observation Herbs, liana and woody pioneers increased after the cyclone.
Observation Primary forest saplings decreased after the cyclone.
Observation Canopy-layer vegetation decreased.
Observation Of killed trees, 39% were uprooted.
Observation Of killed trees, 37% were snapped.
Observation Of killed trees, 24% remained standing.
Association Intermediate-diameter trees had higher mortality than small or large trees.
Observation Herb and woody pioneer frequency increased by 2003.
Observation Liana and primary-forest sapling frequency decreased by 2003.
Observation Shrub-layer vegetation increased by 2003.
Observation Canopy-layer vegetation decreased by 2003.
Recommendation The authors recommended prioritizing fire control after cyclones.

Associationobservedoriginal resultmeasured

Claim · model-written summary

Net ecosystem acetaldehyde emissions were inversely related to foliar density.

Taxon: forestt0
Organ / stage: foliare0
Outcome: Net ecosystem emission ratese0
Direction: inversely relatede0
Qualifier: extinction of light in the canopy and a respective decrease of the acetaldehyde compensation pointe0

Verbatim

e0
“Net ecosystem emission rates were inversely related to foliar density due to the extinction of light in the canopy and a respective decrease of the acetaldehyde compensation point.”
✓ located verbatim in the source · abstract, characters 319–499

t0
“forest canopies”
✓ located verbatim in the source · title, characters 89–104

Title

Plant physiological and environmental controls over the exchange of acetaldehyde between forest canopies and the atmosphere

K. Jardine; P. Harley; T. Karl; et al. Biogeosciences 2008. doi:10.5194/bg-5-1559-2008

Other claims from this paper (9)

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Canopy-layer vegetation decreased by 2003.

Taxon: Forestt0
Outcome: vegetation in the “canopy layer”e0
Direction: decreasee0
Setting: Masoala Peninsulat0

Verbatim

t0
“Forest of Masoala Peninsula, Madagascar”
✓ located verbatim in the source · title, characters 36–75

e0
“a further decrease in trunk density, an increase in the frequency of herbs and woody pioneers, a decrease in the frequency of liana and saplings of primary forest trees in the “shrub layer”, and an increase of vegetation in the “shrub layer” but decrease of vegetation in the “canopy layer”.”
✓ located verbatim in the source · abstract, characters 1452–1743

Title

The Effects of Cyclone Hudah on the Forest of Masoala Peninsula, Madagascar

C Birkinshaw; M Randrianjanahary Madagascar Conservation & Development 2009. doi:10.4314/mcd.v2i1.44125

Other claims from this paper (19)

Observation Satellite images showed severe damage to 3% of the forest.
Observation In the northeast, 22% of forest was severely damaged.
Observation Tree death reached up to 53% of trunks in a plot.
Observation Trunk basal area fell to 64%.
Observation Uprooting reached 46%.
Observation Trunk snapping reached 51%.
Observation Crown volume fell to a mean of 83%.
Observation Herbs, liana and woody pioneers increased after the cyclone.
Observation Primary forest saplings decreased after the cyclone.
Observation Canopy-layer vegetation decreased.
Observation Of killed trees, 39% were uprooted.
Observation Of killed trees, 37% were snapped.
Observation Of killed trees, 24% remained standing.
Association Intermediate-diameter trees had higher mortality than small or large trees.
Observation Trunk density declined further by 2003.
Observation Herb and woody pioneer frequency increased by 2003.
Observation Liana and primary-forest sapling frequency decreased by 2003.
Observation Shrub-layer vegetation increased by 2003.
Recommendation The authors recommended prioritizing fire control after cyclones.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Liana and primary-forest sapling frequency decreased by 2003.

Taxon: Forestt0
Outcome: frequency of liana and saplings of primary forest treese0
Direction: decreasee0
Setting: Masoala Peninsulat0

Verbatim

t0
“Forest of Masoala Peninsula, Madagascar”
✓ located verbatim in the source · title, characters 36–75

e0
“a further decrease in trunk density, an increase in the frequency of herbs and woody pioneers, a decrease in the frequency of liana and saplings of primary forest trees in the “shrub layer”, and an increase of vegetation in the “shrub layer” but decrease of vegetation in the “canopy layer”.”
✓ located verbatim in the source · abstract, characters 1452–1743

Title

The Effects of Cyclone Hudah on the Forest of Masoala Peninsula, Madagascar

C Birkinshaw; M Randrianjanahary Madagascar Conservation & Development 2009. doi:10.4314/mcd.v2i1.44125

Other claims from this paper (19)

Observation Satellite images showed severe damage to 3% of the forest.
Observation In the northeast, 22% of forest was severely damaged.
Observation Tree death reached up to 53% of trunks in a plot.
Observation Trunk basal area fell to 64%.
Observation Uprooting reached 46%.
Observation Trunk snapping reached 51%.
Observation Crown volume fell to a mean of 83%.
Observation Herbs, liana and woody pioneers increased after the cyclone.
Observation Primary forest saplings decreased after the cyclone.
Observation Canopy-layer vegetation decreased.
Observation Of killed trees, 39% were uprooted.
Observation Of killed trees, 37% were snapped.
Observation Of killed trees, 24% remained standing.
Association Intermediate-diameter trees had higher mortality than small or large trees.
Observation Trunk density declined further by 2003.
Observation Herb and woody pioneer frequency increased by 2003.
Observation Shrub-layer vegetation increased by 2003.
Observation Canopy-layer vegetation decreased by 2003.
Recommendation The authors recommended prioritizing fire control after cyclones.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Shrub-layer vegetation increased by 2003.

Taxon: Forestt0
Outcome: vegetation in the “shrub layer”e0
Direction: increasee0
Setting: Masoala Peninsulat0

Verbatim

t0
“Forest of Masoala Peninsula, Madagascar”
✓ located verbatim in the source · title, characters 36–75

e0
“a further decrease in trunk density, an increase in the frequency of herbs and woody pioneers, a decrease in the frequency of liana and saplings of primary forest trees in the “shrub layer”, and an increase of vegetation in the “shrub layer” but decrease of vegetation in the “canopy layer”.”
✓ located verbatim in the source · abstract, characters 1452–1743

Title

The Effects of Cyclone Hudah on the Forest of Masoala Peninsula, Madagascar

C Birkinshaw; M Randrianjanahary Madagascar Conservation & Development 2009. doi:10.4314/mcd.v2i1.44125

Other claims from this paper (19)

Observation Satellite images showed severe damage to 3% of the forest.
Observation In the northeast, 22% of forest was severely damaged.
Observation Tree death reached up to 53% of trunks in a plot.
Observation Trunk basal area fell to 64%.
Observation Uprooting reached 46%.
Observation Trunk snapping reached 51%.
Observation Crown volume fell to a mean of 83%.
Observation Herbs, liana and woody pioneers increased after the cyclone.
Observation Primary forest saplings decreased after the cyclone.
Observation Canopy-layer vegetation decreased.
Observation Of killed trees, 39% were uprooted.
Observation Of killed trees, 37% were snapped.
Observation Of killed trees, 24% remained standing.
Association Intermediate-diameter trees had higher mortality than small or large trees.
Observation Trunk density declined further by 2003.
Observation Herb and woody pioneer frequency increased by 2003.
Observation Liana and primary-forest sapling frequency decreased by 2003.
Observation Canopy-layer vegetation decreased by 2003.
Recommendation The authors recommended prioritizing fire control after cyclones.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Herb and woody pioneer frequency increased by 2003.

Taxon: Forestt0
Outcome: frequency of herbs and woody pioneerse0
Direction: increasee0
Setting: Masoala Peninsulat0

Verbatim

t0
“Forest of Masoala Peninsula, Madagascar”
✓ located verbatim in the source · title, characters 36–75

e0
“a further decrease in trunk density, an increase in the frequency of herbs and woody pioneers, a decrease in the frequency of liana and saplings of primary forest trees in the “shrub layer”, and an increase of vegetation in the “shrub layer” but decrease of vegetation in the “canopy layer”.”
✓ located verbatim in the source · abstract, characters 1452–1743

Title

The Effects of Cyclone Hudah on the Forest of Masoala Peninsula, Madagascar

C Birkinshaw; M Randrianjanahary Madagascar Conservation & Development 2009. doi:10.4314/mcd.v2i1.44125

Other claims from this paper (19)

Observation Satellite images showed severe damage to 3% of the forest.
Observation In the northeast, 22% of forest was severely damaged.
Observation Tree death reached up to 53% of trunks in a plot.
Observation Trunk basal area fell to 64%.
Observation Uprooting reached 46%.
Observation Trunk snapping reached 51%.
Observation Crown volume fell to a mean of 83%.
Observation Herbs, liana and woody pioneers increased after the cyclone.
Observation Primary forest saplings decreased after the cyclone.
Observation Canopy-layer vegetation decreased.
Observation Of killed trees, 39% were uprooted.
Observation Of killed trees, 37% were snapped.
Observation Of killed trees, 24% remained standing.
Association Intermediate-diameter trees had higher mortality than small or large trees.
Observation Trunk density declined further by 2003.
Observation Liana and primary-forest sapling frequency decreased by 2003.
Observation Shrub-layer vegetation increased by 2003.
Observation Canopy-layer vegetation decreased by 2003.
Recommendation The authors recommended prioritizing fire control after cyclones.

Associationobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Declines in aboveground vegetation were positively correlated with decreases in soil carbon and nitrogen indicators.

Taxon: foreste1
Organ / stage: Aboveground vegetatione2
Outcome: soil carbon and nitrogen indicatorse2
Direction: positively correlatede2

Verbatim

e1
“forest degradation markedly decreased aboveground biomass (−132%), basal area (−91%), stand density (−58%), plant diversity (−36%, −14%, and − 40% for Shannon-Wiener diversity index, Pilou evenness index, and species richness), reduced soil organic carbon (−34%), total nitrogen (−34%), microbial biomass carbon (−47%) and microbial biomass nitrogen (−60%)”
✓ located verbatim in the source · abstract, characters 490–846

e2
“Aboveground vegetation declines were significantly and positively correlated with the decrease in soil carbon and nitrogen indicators”
✓ located verbatim in the source · abstract, characters 990–1123

Title

Feedbacks between vegetation and soil in global Forest degradation: a meta-analysis

Huawei Wu; Xuekun Cheng; Yufeng Zhou; et al. Ecological Indicators 2026. doi:10.1016/j.ecolind.2026.114738

Other claims from this paper (12)

Intervention effect Forest degradation decreased aboveground biomass by 132%.
Intervention effect Forest degradation decreased basal area by 91%.
Intervention effect Forest degradation decreased stand density by 58%.
Intervention effect Forest degradation decreased the Shannon-Wiener diversity index by 36%.
Intervention effect Forest degradation decreased the Pilou evenness index by 14%.
Intervention effect Forest degradation decreased species richness by 40%.
Intervention effect Forest degradation reduced soil organic carbon by 34%.
Intervention effect Forest degradation reduced total soil nitrogen by 34%.
Intervention effect Forest degradation reduced microbial biomass carbon by 47%.
Intervention effect Forest degradation reduced microbial biomass nitrogen by 60%.
Observation Forest degradation had significant negative effects in all disturbance types.
Observation Agricultural expansion was associated with the most pronounced negative impacts of forest degradation.

Lexical search (BM25). All words must match; if nothing does, any word. Organism names also match every spelling of the same organism. No semantic search yet.

“decrease in density”

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