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Title Transcription
コヤマイケ テイシツ チュウジョウ シリョウ ノ リュウド ゼン ユウキ タンソ ノウド オヨビ CNヒ ヘンカ
Title Alternative (English)
Vertical Change in Grain-size, Total Organic Carbon and C/N Ratio of the Core Samples from Lake Koyama-ike, Tottori Prefecture, Southwest Japan
File
language
jpn
Author
Sakuno, Yuji
Takayasu, Katsumi
Akagi, Saburo
Nishida, Ryohei
Tanaka, Zenzo
Murata, Yuji
Asamura, Hisashi
Hamada, Tetsuhiro
Description
Two cores of bottom sediment from a small coastal lagoon Koyama-ike were examined to find out the environmental changes. KY9301 cored nearly at the center of the lake is 131cm in length. and KY9401 at the east part of the lake is 93cm. Based on the result of analyses on the water content. grain-size. total organic carbon (TOC). total nitrogen and C/N ratio. they were divided into three units. Unit A'. B'. C' in KY9301 and Unit A. B. C in KY9401 in descending order. The Unit A and Unit A' are characterized by high water-conten in spite of the coarser-grained muddy sediment. high TOC and low C/N ratio. From these data, it can be infered that during this stage the primary productivity of the lake was high with decomposition of organic matter not much advanced. In the Unit B and Unit B ' . grain-size is gradually fining upward with decreasing TOC and rather stable C/N ratio. This seems to indicate that the environment was kept in balance between the addition and the decomposition of organic matter. The Unit C and C' show cyclic changes in all analyzed data. The unit may have been repeatedly flooded with the periodic sediments.
Subject
Lake Kayama-ike
environmental change
grain size
TOC
C/N ratio
Journal Title
Laguna : 汽水域研究
Volume
2
Start Page
11
End Page
20
ISSN
21852995
Published Date
1995-03
NCID
AN10439529
Publisher
島根大学汽水域研究センター
NII Type
Departmental Bulletin Paper
Format
PDF
Text Version
出版社版
Gyoseki ID
e18449
OAI-PMH Set
Estuary Research Center
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