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| Content Provider | Springer Nature Link |
|---|---|
| Author | Yamada, Hiroyuki Nakamura, Futoshi |
| Copyright Year | 2009 |
| Abstract | In recent years, fine sediment, produced by run-off associated with forestry activity and agricultural development that accumulates on riverbeds, has exerted a deleterious influence on lotic ecosystems. This study examined the Oroennukibetsu River, a tributary of the Nukibetsu River, which has been affected by high loads of suspended sediments. Effects of accumulation of fine sediment on the survival rate of masu salmon embryo and also on the redd environment (permeability and intragravel dissolved oxygen concentration) were quantified through a field experiment. Results show that the interchange of DO between intragravel and surface water was not affected directly by permeability or the accumulated fine sediment and that intragravel flow rates can be an important factor controlling embryo survival. A decrease in permeability associated with accumulation of fine sediment lowered the survival rate of embryos by suffocation because the flux of DO that should be supplied to the embryo was severely limited. This situation might be created by the combined effects of an accumulation of fine sediment on the redd and a low DO concentration in the surface water because the DO concentration almost coincided with the intragravel DO. |
| Starting Page | 169 |
| Ending Page | 181 |
| Page Count | 13 |
| File Format | |
| ISSN | 18601871 |
| Journal | Landscape and Ecological Engineering |
| Volume Number | 5 |
| Issue Number | 2 |
| e-ISSN | 1860188X |
| Language | English |
| Publisher | Springer Japan |
| Publisher Date | 2009-04-08 |
| Publisher Place | Japan |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Dissolved oxygen Eyed egg Flux Hyporheic Pool-riffle Plant Ecology Landscape/Regional and Urban Planning Environmental Management Civil Engineering Nature Conservation Landscape Ecology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ecology Management, Monitoring, Policy and Law Nature and Landscape Conservation |
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