Abstract
The mass loss and lignocellulose enzyme activities of Actinothuidium hookeri residues and Cystopteris montana leaf litter in coniferous forest and timberline of western Sichuan, China were investigated. The results showed that both the mass loss rates of A. hookeri and C. Montana in timberline were higher than those in coniferous forest, while enzyme activities in timberline were lower than those in coniferous forest which was contrast with the hypothesis. The mass loss of two ground covers had significant differences in different seasons. The mass loss rate of A. hookeri in snow-covered season accounted for 69.8% and 83.0% of the whole year' s in timberline and coniferous forest, while that of C. montana in the growing season accounted for 82.6% and 83.4% of the whole year' s in timberline and coniferous forest, respectively. C. montana leaf litter decayed faster in the growing season, which was consistent with its higher cellulase activity in the growing season. The result illustrated that the enzymatic hydrolysis of cellulose and hemicellulose might be the main driving force for the early stage of litter decomposition. Multiple linear regression analysis showed that environmental factors and initial litter quality could explain 45.8%-85.1% variation of enzyme activity. The enzyme activities of A. hookeri and C. montana in the process of decomposition were mainly affected by the freeze-thaw cycle in snow-covered season.
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Claims 7
Claim · model-written summary
Both species had higher mass loss in timberline than coniferous forest.
Verbatim
e0“both the mass loss rates of A. hookeri and C. Montana in timberline were higher than those in coniferous forest”
Claim · model-written summary
Both species had lower enzyme activity in timberline than coniferous forest.
Verbatim
e0“enzyme activities in timberline were lower than those in coniferous forest”
t0“Actinothuidium hookeri and Cys- topteris montana”
Claim · model-written summary
A. hookeri snow-season mass loss was 69.8% and 83.0% of annual loss in timberline and forest.
- Taxon
- A. hookeriActinothuidium hookerie0
- Outcome
- mass loss ratee0
- Value
- 69.8% and 83.0%e0
Verbatim
e0“The mass loss rate of A. hookeri in snow-covered season accounted for 69.8% and 83.0% of the whole year’ s in timberline and coniferous forest”
Claim · model-written summary
C. montana growing-season mass loss was 82.6% and 83.4% of annual loss in timberline and forest.
- Taxon
- C. montana
_IMG_1428.jpg?width=60)
Cystopteris montanae0 - Outcome
- mass loss ratee1
- Value
- 82.6% and 83.4%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_IMG_1428.jpg?width=500)
Verbatim
e0“that of C. montana in the growing season accounted for 82.6% and 83.4% of the whole year’ s in timberline and coniferous forest”
e1“The mass loss rate of A. hookeri in snow-covered season”
Claim · model-written summary
C. montana litter decayed faster in the growing season with higher cellulase activity.
- Taxon
- C. montanaCystopteris montanae0
- Gene
- cellulasee0
- Outcome
- leaf litter decayede0
- Direction
- fastere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C. montana leaf litter decayed faster in the growing season, which was consistent with its higher cellulase activity in the growing season”
Claim · model-written summary
Environmental factors and initial litter quality explained 45.8%-85.1% of enzyme activity variation.
- Taxon
- Actinothuidium hookeri and Cys- topteris montanat0
- Outcome
- variation of enzyme activitye0
- Value
- 45.8%-85.1%e0
- Qualifier
- environmental factors and initial litter qualitye0
- Setting
- western Sichuan, Chinat0
Not reportedDirection
Verbatim
e0“environmental factors and initial litter quality could explain 45.8%-85.1% variation of enzyme activity”
t0“Actinothuidium hookeri and Cys- topteris montana in alpine timberline ecotone of western Sichuan, China”
Claim · model-written summary
Freeze-thaw cycles mainly affected decomposition enzyme activities in snow-covered season.
- Taxon
- A. hookeri and C. montanaActinothuidium hookeriCystopteris montanae0
- Outcome
- enzyme activitiese0
- Setting
- snow-covered seasone0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The enzyme activities of A. hookeri and C. montana in the process of decomposition were mainly affected by the freeze-thaw cycle in snow-covered season”