報告書番号

485026

タイトル（和文）

干潟に関する文献調査

タイトル（英文）

TIDAL FLAT -A BIBLIOGRAPHICAL SURVEY

概要 （図表や脚注は「報告書全文」に掲載しております）

約８０編の文献資料により，干潟の水質浄化機能および人工干潟造成事例を中心に知見を収集整理し，将来の研究方向について考察を加えた。１．干潟の水質浄化作用は，底生生物群集による有機物分解により定量的に評価される（群集呼吸）が，わが国ではこの実測データが乏しい。２．干潟の群集呼吸においては，細菌とメイオベントスの寄与が大きいと考えられるが，砂泥間隙中に極めて多数生息しているメイオベトスの生態については不明の点が多い。３．干潟の冠水時，干出時にそれぞれ適した，簡易な群集呼吸測定法を確立することが必要である。

概要 （英文）

ABOUT 80 REPORTS WERE SURVEYED CONCERNING THE ENVIRONMENTAL FUUCTIONS OF TIDAL FLAT AND THE ARTIFICIAL TIDAL FLAT CONSTRUCTION CASES WITH THE OBJECTIVE OF SEARCHING FOR FUTURE RESEARCH PROGRAMS IN THE FIELD OF COASTAL ENVIRONMENT CONSERVATION AND CREATION.1.COMMUNITY METABOLISM OF BENTHIC BIOTA IS CONSIDERED TO BE ONE OF THE KEY FACTORS IN THE WATER PURIFICATION PROCESSES BY TIDAL FLAT. 2.BOTH AEROBIC AND ANAEROBIC DECOMPOSITIONS OF ORGANIC MATERICAL OCCUR IN TIDAL FLAT WHERE SUBMERGENCE AND EMERGENCE ARE PERIODICALLY REPEATED. IT SEEMS NECESSARY TO DEVELOP SIMPLE IN SITU METHODS FOR DETERMINING THE DECOMPOSITION RATES AT EACH OF THE TIDAL PHASES. 3.BIOTURBATION (REWORKING) OF SUBSTRATA BY BENTHIC BIOTA COULD BE OF IMPORTANCE IN THE ENVIRONMENTAL FUNCTIONING OF TIDAL FLAT. THE CONTRIBUTION OF MEIOBENTHOS ALSO REMAINS TO BE QUANTITAVELY EVALUATED. 4.ATTEMPTS HAVE BEEN MADE TO IMPROVE TIDAL FLAT ENVIRONMENTS OR EVEN TO ARTIFICIALLY CONSTRACT TIDAL FLATS IN THE COASTAL SHELLFISHERY IN JAPAN,ALTHOUGH THE SCIENTIFIC RESEARCHES FOR ASSESSING EFFECTS OF THE MAN-MADE TIDAL FLATS ARE ONLY RECETLY UNDERTAKEN. FISHERIES BIOLOGY AND COASTAL CIVIL ENGINEERING HAVE MUCH COMMON TO CONTRIBUTE TO LOCAL FISHEVIES COMMUNITIES THROUGH DESIGNING A PRODUCTIVE ARTIFICIAL TIDAL FLAT OR OTHER FISHERY GROUND IN THE FUTURE.

報告者

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