Ulmus americana 524 claims

species · family Ulmaceae · green plant · NCBI Taxonomy ↗

Common name: American elm — Also written in claims: American elm · American elms · American elm seedlings · American elm trees · U. americana L · white elm

41 spellings

Questions studied on this organism2 questions4 papers

Ulmus americanaUser Henryhartley on en.wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

524 claims

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Observationobservedoriginal resultmeasured

Claim · model-written summary

Control tree foliage emitted CH 4 at 0.03–0.13 nmol·m –2 ·s –1.

Taxon: Ulmus americana “Valley Forge”Ulmus americanae0
Material: Valley Forgee0
Outcome: CH 4e1
Value: 0.03–0.13 nmol·m –2 ·s –1e1
Setting: Toronto, Canadae0

Verbatim

e0
“Using in situ gas–exchange measurements on Ulmus americana “Valley Forge” and Celtis occidentalis in Toronto, Canada, we compared foliar and soil CH 4 and N 2 O fluxes across biochar treatments (0, 20, 40 t ha –1 ) and seasons.”
✓ located verbatim in the source · abstract, characters 439–666

e1
“Foliage of control trees emitted CH 4 (0.03–0.13 nmol·m –2 ·s –1 ) and N 2 O (0.06–0.12 pmol·m –2 ·s –1 ).”
✓ located verbatim in the source · abstract, characters 667–773

Title

Urban Tree Channeling of Soil Methane and Nitrous Oxide and Its Mitigation Using Biochar

Md Rezaul Karim; Sean C. Thomas Environmental Science & Technology 2026. doi:10.1021/acs.est.6c01265

Other claims from this paper (6)

Observation Control tree foliage emitted N 2 O at 0.06–0.12 pmol·m –2 ·s –1.
Intervention effect Biochar shifted foliar methane exchange from weak emission to net uptake.
Intervention effect Biochar reduced foliar nitrous oxide emissions by up to 70%.
Association Soil and foliar gas fluxes were strongly coupled.
Intervention effect City scaling suggested biochar could convert canopy methane emissions to net uptake.
Intervention effect City scaling suggested biochar could halve nitrous oxide emissions.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Control tree foliage emitted N 2 O at 0.06–0.12 pmol·m –2 ·s –1.

Taxon: Ulmus americana “Valley Forge”Ulmus americanae0
Material: Valley Forgee0
Outcome: N 2 Oe1
Value: 0.06–0.12 pmol·m –2 ·s –1e1
Setting: Toronto, Canadae0

Verbatim

e0
“Using in situ gas–exchange measurements on Ulmus americana “Valley Forge” and Celtis occidentalis in Toronto, Canada, we compared foliar and soil CH 4 and N 2 O fluxes across biochar treatments (0, 20, 40 t ha –1 ) and seasons.”
✓ located verbatim in the source · abstract, characters 439–666

e1
“Foliage of control trees emitted CH 4 (0.03–0.13 nmol·m –2 ·s –1 ) and N 2 O (0.06–0.12 pmol·m –2 ·s –1 ).”
✓ located verbatim in the source · abstract, characters 667–773

Title

Urban Tree Channeling of Soil Methane and Nitrous Oxide and Its Mitigation Using Biochar

Md Rezaul Karim; Sean C. Thomas Environmental Science & Technology 2026. doi:10.1021/acs.est.6c01265

Other claims from this paper (6)

Observation Control tree foliage emitted CH 4 at 0.03–0.13 nmol·m –2 ·s –1.
Intervention effect Biochar shifted foliar methane exchange from weak emission to net uptake.
Intervention effect Biochar reduced foliar nitrous oxide emissions by up to 70%.
Association Soil and foliar gas fluxes were strongly coupled.
Intervention effect City scaling suggested biochar could convert canopy methane emissions to net uptake.
Intervention effect City scaling suggested biochar could halve nitrous oxide emissions.

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Biochar shifted foliar methane exchange from weak emission to net uptake.

Taxon: Ulmus americana “Valley Forge”Ulmus americanae0
Treatment: Biochare1
Outcome: foliar CH 4 exchangee1
Direction: net uptakee1
Comparator: weak emissione1
Setting: Toronto, Canadae0

Verbatim

e0
“Using in situ gas–exchange measurements on Ulmus americana “Valley Forge” and Celtis occidentalis in Toronto, Canada, we compared foliar and soil CH 4 and N 2 O fluxes across biochar treatments (0, 20, 40 t ha –1 ) and seasons.”
✓ located verbatim in the source · abstract, characters 439–666

e1
“Biochar shifted foliar CH 4 exchange from weak emission to net uptake and reduced N 2 O emissions by up to 70%; with similar patterns for soil fluxes.”
✓ located verbatim in the source · abstract, characters 774–924

Title

Urban Tree Channeling of Soil Methane and Nitrous Oxide and Its Mitigation Using Biochar

Md Rezaul Karim; Sean C. Thomas Environmental Science & Technology 2026. doi:10.1021/acs.est.6c01265

Other claims from this paper (6)

Observation Control tree foliage emitted CH 4 at 0.03–0.13 nmol·m –2 ·s –1.
Observation Control tree foliage emitted N 2 O at 0.06–0.12 pmol·m –2 ·s –1.
Intervention effect Biochar reduced foliar nitrous oxide emissions by up to 70%.
Association Soil and foliar gas fluxes were strongly coupled.
Intervention effect City scaling suggested biochar could convert canopy methane emissions to net uptake.
Intervention effect City scaling suggested biochar could halve nitrous oxide emissions.

Associationobservedoriginal resultsimulated

Claim · model-written summary

Soil and foliar gas fluxes were strongly coupled.

Taxon: Ulmus americana “Valley Forge”Ulmus americanae0
Outcome: soil and foliar fluxese1
Setting: Toronto, Canadae0

Not reportedDirection

Verbatim

e0
“Using in situ gas–exchange measurements on Ulmus americana “Valley Forge” and Celtis occidentalis in Toronto, Canada, we compared foliar and soil CH 4 and N 2 O fluxes across biochar treatments (0, 20, 40 t ha –1 ) and seasons.”
✓ located verbatim in the source · abstract, characters 439–666

e1
“Structural equation modeling revealed strong coupling between soil and foliar fluxes, implicating xylem-mediated transport of dissolved gases.”
✓ located verbatim in the source · abstract, characters 925–1067

Title

Urban Tree Channeling of Soil Methane and Nitrous Oxide and Its Mitigation Using Biochar

Md Rezaul Karim; Sean C. Thomas Environmental Science & Technology 2026. doi:10.1021/acs.est.6c01265

Other claims from this paper (6)

Observation Control tree foliage emitted CH 4 at 0.03–0.13 nmol·m –2 ·s –1.
Observation Control tree foliage emitted N 2 O at 0.06–0.12 pmol·m –2 ·s –1.
Intervention effect Biochar shifted foliar methane exchange from weak emission to net uptake.
Intervention effect Biochar reduced foliar nitrous oxide emissions by up to 70%.
Intervention effect City scaling suggested biochar could convert canopy methane emissions to net uptake.
Intervention effect City scaling suggested biochar could halve nitrous oxide emissions.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Winnipeg and Regina planted American elm and green ash early because these were available.

Taxon: American elm and green ashUlmus americana Fraxinus pennsylvanicae0
Outcome: planted American elm and green ashe0
Setting: Winnipeg and Reginae0

Verbatim

e0
“Winnipeg and Regina planted American elm and green ash soon after their planting programs began because they were readily available”
✓ located verbatim in the source · abstract, characters 1631–1762

Title

Historical drivers of street tree species selection: A comparative archival study of Canadian prairie cities

Alexander J. F. Martin; Tenley M. Conway Trees Forests and People 2025. doi:10.1016/j.tfp.2025.101044

Other claims from this paper (6)

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Ulmus americana survived and grew under flooding up to 15 weeks.

Taxon: Ulmus americanaUlmus americanae0
Treatment: flooding durations of up to 15 weekse0
Outcome: survive and growe0

Not reportedComparatorDirection

Verbatim

e0
“Taxodium distichum (L.) Rich., Ulmus americana L., and Betula nigra L. were able to survive and grow with flooding durations of up to 15 weeks.”
✓ located verbatim in the source · abstract, characters 727–870

Title

Effects of flood duration on seedling survival and growth of potential replacement species in black ash (Fraxinus nigra Marshall) forests threatened by emerald ash borer

Gwendolen J. Keller; Robert A. Slesak; Dustin Bronson; et al. Trees Forests and People 2023. doi:10.1016/j.tfp.2022.100367

Other claims from this paper (9)

Intervention effect Taxodium distichum survived and grew under flooding up to 15 weeks.
Intervention effect Betula nigra survived and grew under flooding up to 15 weeks.
Intervention effect Thuja occidentalis had high survival and growth with flooding up to 6 weeks.
Intervention effect Acer rubrum had high survival and growth with flooding up to 6 weeks.
Intervention effect Larix laricina had high survival and growth with flooding up to 6 weeks.
Intervention effect Quercus bicolor had high survival and growth with flooding up to 6 weeks.
Intervention effect Betula alleghaniensis had high survival and growth with flooding up to 6 weeks.
Intervention effect Juglans nigra responded poorly to flooding of any duration.
Intervention effect Acer saccharum responded poorly to flooding of any duration.

Method / resourceobservedoriginal resultpositivemeasured

Claim · model-written summary

The assembly identified 85,863 unigenes.

Taxon: American ElmUlmus americanat0
Outcome: non-redundant unigenese0
Value: 85,863e0

Verbatim

e0
“A total of 85,863 non-redundant unigenes were identified.”
✓ located verbatim in the source · abstract, characters 505–562

t0
“American Elm”
✓ located verbatim in the source · title, characters 113–125

Title

Deciphering the Genome-Wide Transcriptomic Changes during Interactions of Resistant and Susceptible Genotypes of American Elm with Ophiostoma novo-ulmi

Md Tabibul Islam; Jose Freixas Coutin; Mukund Shukla; et al. Journal of Fungi 2022. doi:10.3390/jof8020120

Other claims from this paper (6)

Observation American elm had 35,290 genes similar to U. minor.
Observation American elm had 55,499 unique genes.
Observation Photosynthesis and primary metabolism were upregulated in susceptible elm.
Association DED resistance was associated with RPM1-mediated immunity and defense gene upregulation.
Observation Stimulus, stress and secondary metabolism GO terms were enriched in both genotypes.
Observation Defense response was among top enriched terms only in resistant elm.

Observationobservedoriginal resultmeasured

Claim · model-written summary

American elm had 35,290 genes similar to U. minor.

Taxon: U. americanaUlmus americanae0
Outcome: similare0
Value: 35,290e0

Verbatim

e0
“Compared to the previously characterized U. minor transcriptome, U. americana has 35,290 similar and 55,499 unique genes.”
✓ located verbatim in the source · abstract, characters 563–684

Title

Deciphering the Genome-Wide Transcriptomic Changes during Interactions of Resistant and Susceptible Genotypes of American Elm with Ophiostoma novo-ulmi

Md Tabibul Islam; Jose Freixas Coutin; Mukund Shukla; et al. Journal of Fungi 2022. doi:10.3390/jof8020120

Other claims from this paper (6)

Method / resource The assembly identified 85,863 unigenes.
Observation American elm had 55,499 unique genes.
Observation Photosynthesis and primary metabolism were upregulated in susceptible elm.
Association DED resistance was associated with RPM1-mediated immunity and defense gene upregulation.
Observation Stimulus, stress and secondary metabolism GO terms were enriched in both genotypes.
Observation Defense response was among top enriched terms only in resistant elm.

Observationobservedoriginal resultmeasured

Claim · model-written summary

American elm had 55,499 unique genes.

Taxon: U. americanaUlmus americanae0
Outcome: unique genese0
Value: 55,499e0

Verbatim

e0
“Compared to the previously characterized U. minor transcriptome, U. americana has 35,290 similar and 55,499 unique genes.”
✓ located verbatim in the source · abstract, characters 563–684

Title

Deciphering the Genome-Wide Transcriptomic Changes during Interactions of Resistant and Susceptible Genotypes of American Elm with Ophiostoma novo-ulmi

Md Tabibul Islam; Jose Freixas Coutin; Mukund Shukla; et al. Journal of Fungi 2022. doi:10.3390/jof8020120

Other claims from this paper (6)

Method / resource The assembly identified 85,863 unigenes.
Observation American elm had 35,290 genes similar to U. minor.
Observation Photosynthesis and primary metabolism were upregulated in susceptible elm.
Association DED resistance was associated with RPM1-mediated immunity and defense gene upregulation.
Observation Stimulus, stress and secondary metabolism GO terms were enriched in both genotypes.
Observation Defense response was among top enriched terms only in resistant elm.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Photosynthesis and primary metabolism were upregulated in susceptible elm.

Taxon: American ElmUlmus americanat0
Material: susceptible genotypee0
Interactor: Onue0pathogen
Outcome: photosynthesis and primary metabolisme0
Direction: highly upregulatede0

Verbatim

e0
“The transcriptomic variations between ‘Valley Forge’ and ‘S’ were found primarily in the photosynthesis and primary metabolism, which were highly upregulated in the susceptible genotype irrespective of the Onu inoculation.”
✓ located verbatim in the source · abstract, characters 685–907

t0
“American Elm”
✓ located verbatim in the source · title, characters 113–125

Title

Deciphering the Genome-Wide Transcriptomic Changes during Interactions of Resistant and Susceptible Genotypes of American Elm with Ophiostoma novo-ulmi

Md Tabibul Islam; Jose Freixas Coutin; Mukund Shukla; et al. Journal of Fungi 2022. doi:10.3390/jof8020120

Other claims from this paper (6)

Method / resource The assembly identified 85,863 unigenes.
Observation American elm had 35,290 genes similar to U. minor.
Observation American elm had 55,499 unique genes.
Association DED resistance was associated with RPM1-mediated immunity and defense gene upregulation.
Observation Stimulus, stress and secondary metabolism GO terms were enriched in both genotypes.
Observation Defense response was among top enriched terms only in resistant elm.