Abstract
The characteristics of productive structure and its seasonal changes were analyzed in the closed Sasa kurilensis community at Mt. Waisuhorun, 60km. W from Sapporo, Hokkaido, and in some other Sasa communities. Annual net production was also estimated in those Sasa communities.1. The S. kurilensis community showed a nearly constant standing crop of 11kg. dry weight/m.2 throughout the year. This means that the amount of newly produced part in each organ was almost equal to that of withered part.2. With the foliation of new leaves at the end of June, the 2-year-old leaves generally defoliated to keep the amount of whole leaves at a constant level of ca. 0.85kg. wet weight/m.2, or ca. 5 in leaf area index. Productive structure can rapidly recover after thawing from the inactive state in winter by strong elasticity of culms. These facts must play an important role for the large matter production and the large standing crop of the community.3. Relative light intensities under the Sasa community fall in a narrow range of 1-7%, the mean being 2-3%. Such low light intensities can prevent the invasion of other plant species.4. Dry weight of culms showed nearly a constant value, 7.5kg./m.2, throughout the year. The subterranean parts, however, varied in dry weight, i.e. the maximum of 4.2kg. in early November and minimum of 3.0kg. in mid-August. Culms, branches and rhizomes newly formed during the growing season were 390, 245 and 230g. dry weight/m.2, respectively. A linear relationship was observed between the diameter and the logarithm of dry weight of culms.5. The decrease of dry weight in culms and rhizomes, probably of reserved starch was recognized in late spring-early summer when the rapid growth occurred, and then increased till late autumn. Transformation factor from reserved substances into active organs appeared to be 0.5.6. Sasa kurilensis community kept its daily net production at fairly high level throughout the growing season, and a maximum of newly formed increment was about 11g./m.2/day. The annual net production was estimated to be 1.6kg./m.2/year.7. Productive structure and its seasonal variation were studied also in S. nipponica- and S. nikkoensis-communities. The latter could achieve almost the same amount of net production as that of the S. kurilensis community, in spite of the smaller standing crop.
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Claims 19
Claim · model-written summary
The Sasa kurilensis community kept a nearly constant standing crop of 11 kg dry weight per m2 throughout the year.
- Taxon
- S. kurilensis
Sasa kurilensise1 - Outcome
- standing crope1
- Value
- 11kg. dry weight/m.2e1
- Qualifier
- nearly constante1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sasa kurilensis community at Mt. Waisuhorun”
e1“The S. kurilensis community showed a nearly constant standing crop of 11kg. dry weight/m.2 throughout the year”
Claim · model-written summary
The 2-year-old leaves were defoliated so that whole-leaf amount stayed at about 0.85 kg wet weight per m2, a leaf area index of about 5.
- Taxon
- Sasa kurilensisSasa kurilensise0
- Organ / stage
- 2-year-old leavese2
- Outcome
- the amount of whole leavese2
- Value
- ca. 0.85kg. wet weight/m.2e2
- Qualifier
- ca. 5 in leaf area indexe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sasa kurilensis community at Mt. Waisuhorun”
e2“the 2-year-old leaves generally defoliated to keep the amount of whole leaves at a constant level of ca. 0.85kg. wet weight/m.2, or ca. 5 in leaf area index”
Claim · model-written summary
Productive structure recovers rapidly after thawing from winter dormancy, through strong elasticity of culms.
- Taxon
- Sasa kurilensisSasa kurilensise0
- Outcome
- Productive structure can rapidly recover after thawinge3
- Qualifier
- strong elasticity of culmse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sasa kurilensis community at Mt. Waisuhorun”
e3“Productive structure can rapidly recover after thawing from the inactive state in winter by strong elasticity of culms”
Claim · model-written summary
Relative light intensities under the Sasa community ranged from 1 to 7 percent, with a mean of 2-3 percent.
SasaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sasa kurilensis community at Mt. Waisuhorun”
e4“Relative light intensities under the Sasa community fall in a narrow range of 1-7%, the mean being 2-3%”
Claim · model-written summary
Such low light intensities may prevent the invasion of other plant species.
- Taxon
- Sasa kurilensisSasa kurilensise0
- Outcome
- the invasion of other plant speciese5
- Qualifier
- Such low light intensitiese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sasa kurilensis community at Mt. Waisuhorun”
e5“Such low light intensities can prevent the invasion of other plant species”
Claim · model-written summary
Dry weight of culms stayed at nearly 7.5 kg per m2 throughout the year.
- Taxon
- Sasa kurilensisSasa kurilensise0
- Outcome
- Dry weight of culmse6
- Value
- 7.5kg./m.2e6
- Qualifier
- nearly a constant valuee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sasa kurilensis community at Mt. Waisuhorun”
e6“Dry weight of culms showed nearly a constant value, 7.5kg./m.2, throughout the year”
Claim · model-written summary
Subterranean parts reached their maximum dry weight, 4.2 kg per m2, in early November.
- Taxon
- Sasa kurilensisSasa kurilensise0
- Organ / stage
- subterranean partse7
- Outcome
- dry weighte7
- Value
- 4.2kg.e7
- Qualifier
- in early Novembere7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sasa kurilensis community at Mt. Waisuhorun”
e7“The subterranean parts, however, varied in dry weight, i.e. the maximum of 4.2kg. in early November”
Claim · model-written summary
Subterranean parts reached their minimum dry weight, 3.0 kg per m2, in mid-August.
- Taxon
- Sasa kurilensisSasa kurilensise0
- Organ / stage
- subterranean partse6
- Outcome
- dry weighte6
- Value
- 3.0kg.e7
- Qualifier
- mid-Auguste7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sasa kurilensis community at Mt. Waisuhorun”
e6“The subterranean parts, however, varied in dry weight”
e7“minimum of 3.0kg. in mid-August”
Claim · model-written summary
Newly formed culms during the growing season weighed 390 g dry weight per m2.
- Taxon
- Sasa kurilensisSasa kurilensise0
- Organ / stage
- Culmse1
- Outcome
- newly formede1
- Value
- 390e1
- Qualifier
- during the growing seasone1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sasa kurilensis community at Mt. Waisuhorun”
e1“Culms, branches and rhizomes newly formed during the growing season were 390, 245 and 230g. dry weight/m.2, respectively”
Claim · model-written summary
Newly formed branches during the growing season weighed 245 g dry weight per m2.
- Taxon
- Sasa kurilensisSasa kurilensise0
- Organ / stage
- branchese1
- Outcome
- newly formede1
- Value
- 245e1
- Qualifier
- during the growing seasone1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sasa kurilensis community at Mt. Waisuhorun”
e1“Culms, branches and rhizomes newly formed during the growing season were 390, 245 and 230g. dry weight/m.2, respectively”
Claim · model-written summary
Newly formed rhizomes during the growing season weighed 230 g dry weight per m2.
- Taxon
- Sasa kurilensisSasa kurilensise0
- Organ / stage
- rhizomese1
- Outcome
- newly formede1
- Value
- 230g. dry weight/m.2e1
- Qualifier
- during the growing seasone1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sasa kurilensis community at Mt. Waisuhorun”
e1“Culms, branches and rhizomes newly formed during the growing season were 390, 245 and 230g. dry weight/m.2, respectively”
Claim · model-written summary
Dry weight of culms was linearly related to the logarithm of culm diameter.
- Taxon
- Sasa kurilensisSasa kurilensise0
- Organ / stage
- culmse2
- Outcome
- logarithm of dry weight of culmse2
- Qualifier
- A linear relationshipe2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sasa kurilensis community at Mt. Waisuhorun”
e2“A linear relationship was observed between the diameter and the logarithm of dry weight of culms”
Claim · model-written summary
Dry weight of culms and rhizomes decreased in late spring to early summer, probably through use of reserved starch.
- Taxon
- Sasa kurilensisSasa kurilensise0
- Organ / stage
- culms and rhizomese3
- Compound
- reserved starche3
- Outcome
- dry weighte3
- Direction
- decreasee3
- Qualifier
- late spring-early summere3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sasa kurilensis community at Mt. Waisuhorun”
e3“The decrease of dry weight in culms and rhizomes, probably of reserved starch was recognized in late spring-early summer when the rapid growth occurred”
Claim · model-written summary
Dry weight of culms and rhizomes increased from early summer until late autumn.
- Taxon
- Sasa kurilensisSasa kurilensise0
- Organ / stage
- culms and rhizomese3
- Outcome
- dry weighte3
- Direction
- increasede3
- Qualifier
- till late autumne3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sasa kurilensis community at Mt. Waisuhorun”
e3“The decrease of dry weight in culms and rhizomes, probably of reserved starch was recognized in late spring-early summer when the rapid growth occurred, and then increased till late autumn”
Claim · model-written summary
The transformation factor from reserved substances into active organs was about 0.5.
- Taxon
- Sasa kurilensisSasa kurilensise0
- Outcome
- Transformation factor from reserved substances into active organse4
- Value
- 0.5e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sasa kurilensis community at Mt. Waisuhorun”
e4“Transformation factor from reserved substances into active organs appeared to be 0.5”
Claim · model-written summary
The Sasa kurilensis community kept its daily net production at a fairly high level throughout the growing season.
- Taxon
- Sasa kurilensisSasa kurilensise1
- Outcome
- daily net productione1
- Qualifier
- at fairly high levele1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Sasa kurilensis community kept its daily net production at fairly high level throughout the growing season”
Claim · model-written summary
Maximum daily increment of newly formed biomass was about 11 g per m2 per day.
- Taxon
- Sasa kurilensisSasa kurilensise0
- Outcome
- newly formed incremente2
- Value
- 11g./m.2/daye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sasa kurilensis community at Mt. Waisuhorun”
e2“a maximum of newly formed increment was about 11g./m.2/day”
Claim · model-written summary
Annual net production of the Sasa kurilensis community was estimated at 1.6 kg per m2 per year.
- Taxon
- Sasa kurilensisSasa kurilensise0
- Outcome
- annual net productione3
- Value
- 1.6kg./m.2/yeare3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sasa kurilensis community at Mt. Waisuhorun”
e3“The annual net production was estimated to be 1.6kg./m.2/year”
Claim · model-written summary
The S. nikkoensis community achieved almost the same net production as the S. kurilensis community despite a smaller standing crop.
Verbatim
e1“Productive structure and its seasonal variation were studied also in S. nipponica- and S. nikkoensis-communities. The latter could achieve almost the same amount of net production as that of the S. kurilensis community, in spite of the smaller standing crop”