| Summary: | 碩士 === 國立臺灣大學 === 森林學系 === 86 === Survey of the regeneration type, population structure, phenology ,as well as
habitat, ability of germination and regeneration of Maackia
taiwanensis were made
at Yangming area, Taiwan . Maackia taiwanensis grows at west
slope of 815 to 840
meters above sea level, acid soil . 9 forestry plots, 12 grassland plots and 4
seedling observed area are installed. In the forestry plots,
TWINSPAN was used to
analyze 55 tree species, and two types with two subtypes
vegetation are recognized.
A.Machilus thunbergii-Ardisia sieboldii type:
A1. Ardisia sieboldii-Prunus phaeosticta subtype
A2. Itea parviflora-Hydrangea angustipetala subtype
B.Machilus thunbergii-Ardisia sieboldii-Helicia formosana type
Type A is in the earlier phase in the succession, Maackia
taiwanensis was distributed
in clumps; type B is the later phase, Maackia taiwanensis was
very rare. The succession
may be occurred from A2 type to A1 type to B type.
The germination rate of Maackia taiwanensis is very high, and
seedlings were observed
under the forest. But the seedlings of Maackia taiwanensis need
much of sun light, after
other plants grow well, the seedlings are disappeared rapidly.
Seed is the only way for
Maackia taiwanensis to regenerate, and seedlings are always
depressive at original habits,
Maackia taiwanensis may be decline and extinct in Taiwan in the future.
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