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| Titel |
Fine root dynamics in moso bamboo and Japanese cedar forest by scanner
method in central Taiwan |
| VerfasserIn |
Zhi-Wei Chen, Po-Hsuan Lin, Tomonori Kume |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250137806
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| Publikation (Nr.) |
 EGU/EGU2017-646.pdf |
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| Zusammenfassung |
| Phyllostachys pubescens is one of the most important economic plant in the world.
Phyllostachys pubescens originates from China and it had been introduced to neighbor
countries about three hundred ago due to its economic value. But substantial bamboo forests
were abandoned due to declines in demand. These unmanaged bamboo forests have
been expanding to adjacent original forests in northern Taiwan. This vegetation
alternation may not only decrease the local biodiversity but also affect the carbon
cycle.
Fine roots are responsible for water and nutrients acquisition and forming the most active
part of the whole root system. The characteristics of fine roots are non-woody, small
diameter and short lifespan. When roots keep producing new roots and replacing
old roots, carbon and nutrients was transported into soil. Consequently, fine root
production is one of the important component to understand the below-ground carbon
cycle. However, there is few studies about fine root production in moso bamboo
forests. We still lack effective method to obtain quantitative and objective data
in Taiwan. It severely limits us to understand the below-ground carbon dynamics
there.
Minirhizotrons method has been used to investigate fine root dynamics by inserting
transparent tubes into soil and by comparing changes in root length in images taken by
micro-camera. But this method has some shortcomings; i.e. Most of image analysis are
conducted manually and time-consuming. And it is difficult to estimate the stand level fine
root production from small observation view. A new method “scanner method”, which collect
A4-size image (bigger than minirhizotrons) can overcome some parts of the shortcoming of
minirhizotrons. The transparent acrylic box with A4-box view is inserted into soil and the
interface between soil and box is scanned by commercial scanner. We can monitor
the total projected root area, growth and decomposition separately by series of
images.
The primary objective of this study is to characterize the temporal and spatial variation of
fine root dynamics in moso bamboo forests in central Taiwan by using scanner method with 6
acrylic boxes. Other the other hand, this study compared the result with those of
adjacent Japanese cedar forests with 8 acrylic boxes. Consequently, we found the
fine root production rate and decomposition rate of the bamboo forest are higher
than cedar forest. Also, the timing of first observation of new roots was earlier in
bamboo forest than cedar forest. This study also examined differences of temporal
patterns among measurement locations based on long-term data after box installation. |
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