湖山池底質柱状試料の粒度,全有機炭素濃度およびC/N比変化

Laguna : 汽水域研究 Volume 2 Page 11-20 published_at 1995-03
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Title
湖山池底質柱状試料の粒度,全有機炭素濃度およびC/N比変化
Title
Vertical Change in Grain-size, Total Organic Carbon and C/N Ratio of the Core Samples from Lake Koyama-ike, Tottori Prefecture, Southwest Japan
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
Creator
Sakuno Yuji
Akagi Saburo
Nishida Ryohei
Tanaka Zenzo
Murata Yuji
Asamura Hisashi
Hamada Tetsuhiro
Source Title
Laguna : 汽水域研究
Volume 2
Start Page 11
End Page 20
Journal Identifire
ISSN 21852995
Descriptions
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.
Subjects
Lake Kayama-ike
environmental change
grain size
TOC
C/N ratio
Language
jpn
Resource Type departmental bulletin paper
Publisher
島根大学汽水域研究センター
Date of Issued 1995-03
Publish Type Version of Record
Access Rights open access
Relation
[NCID] AN10439529