Vertical variation in mass and CO2 efflux of litter from the ground to the 40m high canopy in a Bornean tropical rainforest

2021 ◽  
Vol 311 ◽  
pp. 108659
Author(s):  
Ayumi Katayama ◽  
Izuki Endo ◽  
Naoki Makita ◽  
Kazuho Matsumoto ◽  
Tomonori Kume ◽  
...  
Keyword(s):  
Tropical Rainforest ◽  
Co2 Efflux ◽  
Vertical Variation

scholarly journals Vertical variations in wood CO2 efflux for live emergent trees in a Bornean tropical rainforest

2014 ◽  
Vol 34 (5) ◽  
pp. 503-512 ◽  
Author(s):  
A. Katayama ◽  
T. Kume ◽  
H. Komatsu ◽  
M. Ohashi ◽  
K. Matsumoto ◽  
...  
Keyword(s):  
Tropical Rainforest ◽  
Co2 Efflux ◽  
Vertical Variations

Characteristics of soil CO2 efflux variability in an aseasonal tropical rainforest in Borneo Island

2008 ◽  
Vol 90 (3) ◽  
pp. 275-289 ◽  
Author(s):  
Mizue Ohashi ◽  
Tomo’omi Kumagai ◽  
Tomonori Kume ◽  
Koichiro Gyokusen ◽  
Taku M. Saitoh ◽  
...  
Keyword(s):  
Tropical Rainforest ◽  
Soil Co2 Efflux ◽  
Co2 Efflux ◽  
Soil Co2

scholarly journals Individual- and stand-level Stem CO<sub>2</sub> efflux in a subtropical <i>Schima superba</i> plantation

2012 ◽  
Vol 9 (3) ◽  
pp. 3289-3315
Author(s):  
L. W. Zhu ◽  
P. Zhao ◽  
G. Y. Ni ◽  
Q. P. Cao ◽  
C. M. Zhou ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Temperature Response ◽  
Stem Volume ◽  
Co2 Efflux ◽  
Vertical Variation ◽  
Schima Superba ◽  
Stem Temperature ◽  
Stem Co2 Efflux ◽  
Q10 Values ◽  
Gas Exchange System

Abstract. Stem CO2 efflux was investigated with an open gas exchange system while stand microclimate and stem temperature were continuously monitored in a Schima superba plantation in South China for several days in August and December, 2010. The temperature response of respiration over the different seasons, the vertical variation in stem CO2 efflux along the stem and the stand-level stem CO2 efflux were examined. Stem volume was identified as the better correlate for stem CO2 efflux and was used as scaling scalar for the stand-level estimates of stem CO2 efflux in this S. superba plantation. Volume-based stem CO2 efflux was higher at 2 m than at 1.3 m. Mean stem CO2 efflux was 268.9 and 104.6 μmol m−3 s−1 in August and December, respectively, indicating a dramatic seasonal variation of stem CO2 efflux. The temperature response of stem CO2 efflux was constant during our study period with Q10 values of 1.9 and 1.8. In this subtropical S. superba plantation, the averaged stem CO2 efflux per unit ground area was 3.36 and 1.26 μmol m−2 s−1 in August and December, respectively, which was underestimated due to the vertical variation of stem CO2 efflux along the stem. Our results suggest that stem CO2 efflux has a constant temperature response on the stand scale, and the seasonal variation in stem CO2 efflux is mainly controlled by stem temperature, and the vertical variation in stem CO2 efflux needs to be considered at the stand-level estimation.

Vertical variation in wood CO2 efflux is not uniformly related to height: measurement across various species and sizes of Bornean tropical rainforest trees

2019 ◽  
Vol 39 (6) ◽  
pp. 1000-1008 ◽  
Author(s):  
Ayumi Katayama ◽  
Tomonori Kume ◽  
Ryuji Ichihashi ◽  
Michiko Nakagawa
Keyword(s):  
Individual Variation ◽  
Tree Height ◽  
Co2 Efflux ◽  
Height Measurement ◽  
Vertical Variation ◽  
Factors Affecting ◽  
Breast Height ◽  
Measurement Height ◽  
Individual Scale ◽  
The Individual

Abstract Limited knowledge about vertical variation in wood CO2 efflux (Rwood) is still a cause of uncertainty in Rwood estimates at individual and ecosystem scales. Although previous studies found higher Rwood in the canopy, they examined several tree species of similar size. In contrast, in the present study, we measured vertical variation in Rwood for 18 trees including 13 species, using a canopy crane for a more precise determination of the vertical variation in Rwood, for various species and sizes of trees in order to examine the factors affecting vertical variation in Rwood and thus, to better understand the effect of taking into account the vertical and inter-individual variation on estimates of Rwood at the individual scale. We did not find any clear pattern of vertical variation; Rwood increased significantly with measurement height for only one tree, while it decreased for two more trees, and was not significantly related with measurement height in 15 other trees. Canopy to breast height Rwood ratio was not related to diameter at breast height or crown ratio, which supposedly are factors affecting vertical variation in Rwood. On average, Rwood estimates at individual scale, considering inter-individual variation but ignoring vertical variation, were only 6% higher than estimates considering both forms of variation. However, estimates considering vertical variation, while ignoring inter-individual variation, were 13% higher than estimates considering both forms of variation. These results suggest that individual measurements at breast height are more important for estimating Rwood at the individual scale, and that any error in Rwood estimation at this scale, due to the absence of any more measurements along tree height, is really quite negligible. This study measured various species and sizes of trees, which may be attributed to no clear vertical variation because factors causing vertical variation can differ among species and sizes.

scholarly journals Individual- and stand-level stem CO<sub>2</sub> efflux in a subtropical <I>Schima superba</I> plantation

2012 ◽  
Vol 9 (10) ◽  
pp. 3729-3737 ◽  
Author(s):  
L. W. Zhu ◽  
P. Zhao ◽  
G. Y. Ni ◽  
Q. P. Cao ◽  
C. M. Zhou ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Ecosystem Respiration ◽  
Temperature Response ◽  
Stem Volume ◽  
Co2 Efflux ◽  
Vertical Variation ◽  
Schima Superba ◽  
Stem Temperature ◽  
Stem Co2 Efflux ◽  
Gas Exchange System

Abstract. Stem respiration is an important, but poorly studied component of total forest ecosystem respiration. Stem CO2 efflux was investigated with an open gas exchange system while stand microclimate and stem temperature were continuously monitored in a Schima superba plantation in South China for several days in August and December 2010. The temperature response of respiration in the different seasons, the vertical variation in stem CO2 efflux along the stem, and the stand-level stem CO2 efflux were examined. Stem volume was identified as the better correlate for stem CO2 efflux and was used as the scalar for the stand-level estimates of stem CO2 efflux in this S. superba plantation. Volume-based stem CO2 efflux was higher at 2 m than at 1.3 m. Mean stem CO2 efflux was 268.9 and 104.6 μmol m−3 s−1 in August and December, respectively, indicating a dramatic seasonal variation of stem CO2 efflux. The temperature response of stem CO2 efflux remained constant during our study period with Q10 values of 1.9 and 1.8. In this subtropical S. superba plantation, stem CO2 efflux per unit ground area averaged 3.36 and 1.26 μmol m−2 s−1 based on the measurement data at 1.3-m height of the stem in August and December, respectively. Our results suggest that stem CO2 efflux has a constant temperature response, and the seasonal variation in stem CO2 efflux is mainly controlled by stem temperature, and the vertical variation in stem CO2 efflux needs to be considered in the stand-level estimation.

Characteristics of wood CO2 efflux in a Bornean tropical rainforest

2016 ◽  
Vol 220 ◽  
pp. 190-199 ◽  
Author(s):  
Ayumi Katayama ◽  
Tomonori Kume ◽  
Mizue Ohashi ◽  
Kazuho Matsumoto ◽  
Michiko Nakagawa ◽  
...  
Keyword(s):  
Tropical Rainforest ◽  
Co2 Efflux
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