Abstract
Logarithmic equations for estimating component biomass and projected leaf area from stem diameter and (or) sapwood cross-sectional area were computed for western larch (Larixoccidentalis Nutt.), lodgepole pine (Pinuscontorta Dougl.), and Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) in a mixed conifer stand in the Cascades of central Washington. Regression equations for estimating foliage biomass reported in this study did not compare favorably with foliage biomass allometric relations from other studies. For a given diameter, western larch supported a greater current foliage mass than lodgepole pine or Douglas-fir (P < 0.001); however, the total foliage mass of lodgepole pine was significantly greater (P < 0.001) than western larch. Despite lodgepole pine supporting a total foliage mass approximately twofold greater than western larch, allometric relations between foliage area and stem diameter were not different (P > 0.05) between the deciduous and evergreen conifer. Western larch supports a needle morphology that provides a greater photosynthetic surface area per unit of carbon invested than evergreen conifers in this environment.
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Claims 7
Claim · model-written summary
Foliage biomass regressions compared unfavorably with regressions in other studies.
- Taxon
- western larch
Larix occidentalise1 - Outcome
- Regression equations for estimating foliage biomasse0
- Direction
- did not compare favorablye0
- Comparator
- foliage biomass allometric relations from other studiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Regression equations for estimating foliage biomass reported in this study did not compare favorably with foliage biomass allometric relations from other studies.”
e1“western larch (Larixoccidentalis Nutt.)”
Claim · model-written summary
At a given diameter, western larch had more current foliage mass than lodgepole pine.
- Taxon
- western larchLarix occidentalise0
- Outcome
- current foliage masse0
- Direction
- greatere0
- Qualifier
- For a given diametere0
- Comparator
- lodgepole pinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For a given diameter, western larch supported a greater current foliage mass than lodgepole pine or Douglas-fir (P < 0.001)”
Claim · model-written summary
At a given diameter, western larch had more current foliage mass than Douglas-fir.
- Taxon
- western larchLarix occidentalise0
- Outcome
- current foliage masse0
- Direction
- greatere0
- Qualifier
- For a given diametere0
- Comparator
- Douglas-fire0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For a given diameter, western larch supported a greater current foliage mass than lodgepole pine or Douglas-fir (P < 0.001)”
Claim · model-written summary
Lodgepole pine had more total foliage mass than western larch.
- Taxon
- lodgepole pine
Pinus contortae0 - Outcome
- total foliage masse0
- Direction
- greatere0
- Comparator
- western larche0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the total foliage mass of lodgepole pine was significantly greater (P < 0.001) than western larch.”
Claim · model-written summary
Lodgepole pine supported approximately twice the total foliage mass of western larch.
- Taxon
- lodgepole pinePinus contortae0
- Outcome
- total foliage masse0
- Direction
- greatere0
- Value
- approximately twofolde0
- Comparator
- western larche0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lodgepole pine supporting a total foliage mass approximately twofold greater than western larch”
Claim · model-written summary
Foliage-area versus stem-diameter allometry did not differ between western larch and lodgepole pine.
- Taxon
- western larchLarix occidentalise1
- Outcome
- allometric relations between foliage area and stem diametere0
- Direction
- not differente0
- Comparator
- lodgepole pinee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“allometric relations between foliage area and stem diameter were not different (P > 0.05) between the deciduous and evergreen conifer”
e1“western larch (Larixoccidentalis Nutt.), lodgepole pine (Pinuscontorta Dougl.)”
Claim · model-written summary
Western larch needles provide more photosynthetic area per carbon invested than evergreen conifers.
- Taxon
- Western larchLarix occidentalise0
- Organ / stage
- needlee0
- Outcome
- photosynthetic surface area per unit of carbon investede0
- Direction
- greatere0
- Comparator
- evergreen coniferse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Western larch supports a needle morphology that provides a greater photosynthetic surface area per unit of carbon invested than evergreen conifers in this environment.”