Marine Ecosystems Research Department - jamstec japan agency ...

JAMSTEC 2002 Annual Report
Marine Ecosystems Research Department
a
δ 18 O (‰)
-3
Pf
-4
→
Mf
→
→ Kf
b
→
→
Ms
Ks
→
-3
Ps -4
Tf
Ts
-5
-5
Fast growing
Pf’
Ps’ Slow growing
-6
-6
-5 -4 -3 -2 -1 0 -5 -4 -3 -2 -1 0
δ 13 C (‰) δ 13 C (‰)
Fig.16 The compositional changes in the carbon and oxygen stable isotopes. The fast-growing coral (a) is
characterized as a large contribution of metabolic isotope effect ( M f ) compared with kinetic isotope
effect ( K f ) relatively. The slow-growing coral (b) is characterized as a small contribution of metabolic
isotope effect ( M s ) compared with kinetic isotope effect ( K s ).
effects such as photosynthesis. This model might
improve the past environmental condition and biogenic
carbonate.
a
b
Research on phenotypic diversity of benthic arborescent
organisms
Period: FY-FY
The sea area around Japan contain a great diversity
of benthic fauna such as Octocorallia and black coral
species. Unlike hermatypic coral species, which can
only live in shallow tropical and subtropical waters,
Octocorallia also inhabits the high-latitude regions and
deep-sea areas. In this research I verify the reproductive
patterns that adapt to low water temperatures to
confirm factors through which this coral has extended
its habitat from shallow sea areas to the deep sea, and
from the low to the high latitudes. The purpose of this
research is to gain a phylogeographical understanding
of species classification. It was conducted that the
research on the reproductive pattern and period and
genetic diversity for gorgonian species (Octocorallia)
inhabiting shallow waters, and build a taxonomic base
for species inhabiting the deep sea.
In fiscal it was conducted that the analysis on
the classification and morphometry based on existing
data both for species of gorgonian (Octocorallia:
Gorgonacea) that inhabit deep-sea areas and species
that inhabit shallow waters (Fig.). It was carried
out field surveys on species that live at depths of
around m at the Otsuchi Marine Research Center,
Ocean Research Institute, University of Tokyo, and
Fig.17 (a) Melithaea flabellifera. (b) Primnoidae sample collected
by the Otsuchi Marine Research Center, Ocean Research
Institute, University of Tokyo in fiscal 2002.
examined their distribution in this area. It was also
carried out taxonomic studies on samples collected by
the Ocean Research Institute, University of Tokyo.
These results were presented in scientific journals, and
at conferences and symposiums in overseas.
The establishment of method to measure the genome
size using fluorophotometry
Period: FY-
Generally microbes with small genome size had
been utilized to analyze whole genome. Recently,
analysis of genome was expanded in humanbeing and
some model organisms with large genome size.
Pulsed-field gel electrophoresis was often used to
measure the genome size. However, in this method the
measurable genome size is restricted and much time
and expensive reagents are needed to measure. On the
other hand, fluorophotometry is a simple method but
relatively high reliability in the measured value. In this
method, however, not only DNA but also some other
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