| File | |
| Title |
湖水環境の人為的改造と底生有孔虫の群集変化(その6) : 塩分躍層に相当する水深でのAmmoniaイベントの確認
|
| Title |
Benthic Foraminiferal Changes in Relation to Human Activities(Part 6) : Discovery of the Ammonia Event at Halocline Depth
|
| Title Transcription |
コスイ カンキョウ ノ ジンイテキ カイゾウ ト テイセイ ユウコウチュウ ノ グンシュウ ヘンカ ソノ6 エンブン ヤクソウ ニ ソウトウスル スイシン デノ AMMONIA イベント ノ カクニン
|
| Creator |
Fukuda Takahiro
|
| Source Title |
Laguna : 汽水域研究
|
| Volume | 6 |
| Start Page | 119 |
| End Page | 122 |
| Journal Identifire |
ISSN 21852995
|
| Descriptions |
Benthic foraminifera have significantly changed their main constituents in the last three decades, in association with brackish environmental changes in two Lakes Shinjiko and Nakaumi. The Ammonia event, indicating a replacement of previously developed Haplophragmoides canariensis with recently developed Ammonia beccarii, was discovered at 3.0-4.0 cm sub-bottom depths of sediment cores obtained at 3.0-4.5 m water depths of Lake Nakaumi. These water depths are correlated with a halocline developed in this lake and are important to reconstruct the recent history of the relationships between the shallower and deeper parts of Lake Nakaumi. Thus, the discovery of the Ammonia event indicates that the sediment-water interface has changed not only in deeper area, but also in shallower area in recent years.
We suggest that the recent increase of Ammonia indicates a progressive loading of orgainc matter in the shallower area of Lake Nakaumi. |
| Subjects | |
| Language |
jpn
|
| Resource Type | departmental bulletin paper |
| Publisher |
島根大学汽水域研究センター
|
| Date of Issued | 1999-03 |
| Publish Type | Version of Record |
| Access Rights | open access |
| Relation |
[NCID] AN10439529
|
