Variations in enzyme activities in tidal flat sediments; considerations for evaluating their decomposing function in the ecosystem.
スポンサーリンク
概要
- 論文の詳細を見る
Since hydrolytic enzyme activities vary spatially and temporally in sediment, it is important to collect field samples using an appropriate method for the evaluation of their decomposing function in a tidal flat ecosystem. In this report, variations in enzyme activities were determined to establish the appropriate method for evaluating their ecological functions. A field survey was carried out in June and September of 2001, and to sediment samples were collected from 5 layers 0-75 mm deep at seven sites in the Banzu tidal flat located in the river mouth area of the Obitsu river. For each sample, three enzyme activities (β-glucosidase, GLU; β-acetylglucosaminidase, AGA; esterase, EST) were determined. Among all 70 samples, the mean and standard deviation values were, respectively, 0.022±0.012 unit g<SUP>-1</SUP> h<SUP>-1</SUP> (EST), 10.4±8.5μmol g<SUP>-1</SUP>h<SUP>-1</SUP> (GLU), and 6.8±5.0μmol g<SUP>-1</SUP>h<SUP>-1</SUP> (AGA). For testing the effects of sampling time, site location, and sampling layer depth on these enzyme activities, a three-way analysis of variance (ANOVA) was adopted, and showed that differences in site location, depth of the sampling layer and the interaction between those two parameters were significant. On the other hand, ANOVA results showed that among 56 subsurface samples (15-75mm) demonstrated that the difference in site location was significant, but that the difference in sampling layer depth had no significant effect on GLU or AGA activities while the interaction effect was not significant for any of the three enzyme activities. These results suggested that the sediment samples for measuring enzyme activities should be collected from subsurface layers to reduce the rate of sampling errors.
- 日本陸水学会の論文
日本陸水学会 | 論文
- キイロカワカゲロウの孵化におよぼす水温の影響〔英文〕
- キイロカワカゲロウ羽化の経日・日周変化〔英文〕
- Studies on Taxonomy and Distribution of the Freshwater Snails,Genus,Semisulcospia in the Three Islands inside Lake Biwa
- びわ湖南湖におけるタテヒダカワニナおよびカゴメカワニナの分布とその決定要因について
- ちりとり型金綱による河川底生動物採集上の問題点