懸浮物與沉積物中之脂質
Date Issued
2002
Date
2002
Author(s)
鄭偉力
DOI
902611M002007
Abstract
Total suspended matter (TSM)
and sediment samples from the East
China Sea (ECS) Shelf were analyzed
for aliphatic hydrocarbons, alkanols
and sterols in order to explore their
area distribution and relations between
TSM and sediments. TSM samples
showed a strong predominance of
n-C17, pristane, n-C18, n-C19, n-C19:1,
n-C21:6 and squalene; they were
planktonically-derived hydrocarbons
(PDHCs) and accounted for most of
total hydrocarbons. Stations with
high percentages of PDHCs were
generally situated near the Changjiang.
In addition, three stations with highest
concentrations of n-C21:6 were located
in the hot spot of chlorophyll reported
in the literature. Phytol (the most
abundant alcohol in TSM) along with
C20:1 and C22:1 n-alkenols were
dominant in the alcohol fraction,
indicating plankton contribution. The
sterol composition of TSM was
dominated by, in decreasing order,
24-methylcholesta-5,22E-dien-3b-ol
(brassicasterol/diatomsterol),
cholest-5-en-3b-ol (cholesterol),
cholesta-5,22E-dien-3b-ol
(22-dehydro-cholesterol), and
27-nor-24-methylcholesta-5,22E-dien-
3b-ol. Terrigenous lipids from the
Changjiang did not play a role in TSM
since they were transported mainly
southward.
A comparison of PDHCs in TSM
and in sediments showed that
degradation is in the following order:
n-C21:6> n-C19:1, n-C19, and n-C17 >
n-C18, pristane, and squalene. The
order for degradation of alcohols was
C20:1 and C22:1 n-alkenols > phytol.
Carbon preference indices (CPIs)
of suspended matter varied from 1.04
to 1.82 with an average of 1.41, and
those of sediment ranged between 1.82
and 3.74 with a mean of 2.81. The
CPI difference could be attributed to
grain size effect.
Subjects
Lipids
Suspended Matter
Sediment
Publisher
臺北市：國立臺灣大學海洋研究所
Type
report
File(s)![Thumbnail Image]()
Loading...
Name
902611M002007.pdf
Size
246.37 KB
Format
Adobe PDF
Checksum
(MD5):e5e18e077a0b5ae75fdbc8be84764300