Temporal Variation and Hysteresis of Soil Respiration and Sap Flow of Pinus densiflora in a Cool Temperate Forest, Japan

Soil respiration (Rs) consists of autotrophic (Ra) and heterotrophic (Rh) respiration, and the metabolic responses of Ra and Rh are supposedly affected by environmental factors. Our hypothesis was that the contribution of Ra and Rh would be affected by seasons. To characterize seasonal patterns of R...

Full description

Saved in:
Bibliographic Details
Published in:Forests 2022-11, Vol.13 (11), p.1833
Main Authors: Adachi, Minaco, Hobara, Yudai, Saitoh, Taku M., Hirota, Mitsuru
Format: Article
Language:English
Subjects:
Autumn
Carbon
Carbon cycle (Biogeochemistry)
contribution of autotrophic respiration
Environmental aspects
Environmental factors
Flow
Forests
heterotrophic respiration
Hysteresis
Litter fall
Metabolic response
Observations
Photosynthesis
Physiological aspects
Pine
Precipitation
Respiration
Sap
Seasonal variations
secondary forest
Soil temperature
soil water content
Spring
Spring (season)
Summer
Temperate forests
Temporal variations
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Soil respiration (Rs) consists of autotrophic (Ra) and heterotrophic (Rh) respiration, and the metabolic responses of Ra and Rh are supposedly affected by environmental factors. Our hypothesis was that the contribution of Ra and Rh would be affected by seasons. To characterize seasonal patterns of Rs, sap flow (as an indicator of photosynthetic activity), and environmental factors, we continuously measured temporal variation in Rs using an automated opening and closing chamber system in a cool temperate forest. Rs had counterclockwise hysteresis (Rs: spring < autumn) with soil temperature at a depth of 5 cm. Daily maximum Rs had a significant positive relationship with daily maximum sap flow over three seasons, and daily maximum sap flow was lower in autumn than in spring (Ra: spring > autumn). The amount of leaf litterfall increased significantly from August to October; the high Rs in autumn would be due to an increase in Rh (Rh: spring < autumn). These results suggest that Ra contributes more in spring than in autumn, and the contribution of Rh is high from summer through autumn.
ISSN:1999-4907
1999-4907
DOI:10.3390/f13111833