水生生物の分解に及ぼす水温の影響
スポンサーリンク
概要
- 論文の詳細を見る
1. The relationship between representative aquatic organisms and water temperature was comfirmed with experiments both in the field and in the laboratory. 2. The rate of decomposition of each species is indicated by the percentage of the dry weight of its remainder to its total dry weight. In the field comparison was made in the seasonal processes in which each material is set. In the laboratory, the processes of decomposition are observed at 5°±1℃, 12°-17℃ (room temperature), 20°±1℃ and 30°±1℃. 3. Each body of these plants and animals was observed to decrease in a hyperbolic curve, but the process of decomposition, when observed by the semi-logarithm, was made more distinct than in a hyperbolic curve. Though the rate of decomposition was affected by changes in temperature, it stagnates at about 40 per cent in the remainders of curcian and crawfish, for almost nothing but skeleton and crust remains. In the water-flea (Daphnia, Cyclops) their crust is so soft that it is much affected by water temperature, and decreases in a straight line. The flesh of animals disappears within 10 days at 30℃, and within 50-60 days at 5°-10℃, but it is estimated from the results of experiments that their skeleton and crust require several years or more than 10 years. 4. The decomposition of plants requires a longer time than that of the animals. Even in such soft materials as Spirogyra 10 per cent of their bodies are found remaining at 30℃ after the passage of 100 days, and so it takes about 2000 days for the stem of a reed to disappear. Generally the submerged and floating-leaved vegetation die in autumn and therefore most of their bodies cannot complete disolution into water before the year-end and so they are carried over the winter as detritus. 5. The decomposition rate of materials in bottles in the laboratory are slower than that of the same materials in the field. The value of pH, disolved O_2,NH_4-N, PO_4-P and KMnO_4 con. in water were measured in the course of decomposition. From the results it is found that the condition of water is similar at each stage of decomposition in spite of the differences both in the changes of temperature and in the rate of decomposition.
- 日本生態学会の論文
- 1966-10-01
著者
関連論文
- 兵庫県伊丹下池産マミズクラゲの出現期と環境条件(生理・発生・実験形態・生化学・分類・生態)
- 綜合討論(心理学・生態学)
- タカハヤの食性と餌料選択
- 水生昆虫の摂食量
- 熱帯アジアにおける陸水生物学的予備調査
- JPF東南アジア予備調査報告(第二報)(PF)
- 水生生物の分解に及ぼす水温の影響
- Daphnia pulexの季節的消長とその要因分析I : 生活環と水温の関係
- ハエトリグモの社会行動
- 飼育による淡水産ZooplanktonのClに対する耐忍性(細胞遺伝・生態)
- 兵庫県にあるダム湖の陸水生物学的研究
- 山陰地方のダム湖の陸水生物学的研究