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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Karjalainen, Satu Maaria Turunen, Jarno Rääpysjärvi, Jaana Muotka, Timo Vuori, Kari-Matti Sutela, Tapio Aroviita, Jukka |
| Description | Author Affiliation: Turunen J ( Finnish Environment Institute, Freshwater Centre, PO Box 413, 90014 Oulu, Finland); Muotka T ( Department of Ecology, PO Box 3000, 90014, University of Oulu, Finland); Vuori KM ( Finnish Environment Institute, Laboratory Centre, PO Box 35, 40014, University of Jyväskylä, Finland); Karjalainen SM ( Finnish Environment Institute, Freshwater Centre, PO Box 413, 90014 Oulu, Finland.); Rääpysjärvi J ( Finnish Environment Institute, Freshwater Centre, PO Box 413, 90014 Oulu, Finland.); Sutela T ( Natural Resources Institute Finland, PO Box 413, 90014 Oulu, Finland.); Aroviita J ( Finnish Environment Institute, Freshwater Centre, PO Box 413, 90014 Oulu, Finland.) |
| Abstract | Non-point diffuse pollution from land use and alteration of hydromorphology are among the most detrimental stressors to stream ecosystems. We explored the independent and interactive effects of morphological channel alteration (channelization for water transport of timber) and diffuse pollution on species richness and community structure of four organism groups in boreal streams: diatoms, macrophytes, macroinvertebrates, and fish. Furthermore, the effect of these stressors on stream condition was evaluated by Ecological Quality Ratios (EQR) from the national Water Framework Directive (WFD) assessment system. We grouped 91 study sites into four groups that were impacted by either diffuse pollution or hydromorphological alteration, by both stressors, or by neither one. Macroinvertebrate richness was reduced by diffuse pollution, whereas other biological groups were unaltered. Hydromorphological modification had no effect on taxon richness of any of the assemblages. Community structure of all groups was significantly affected by diffuse pollution but not by hydromorphology. Similarly, EQRs indicated negative response by diatoms, macroinvertebrates and fish to diffuse pollution, but not to hydromorphological alteration. Agricultural diffuse pollution thus affected species identities and abundances rather than taxonomic richness. Our results suggest that channelization of boreal streams for timber transport has not altered hydromorphological conditions sufficiently to have a strong impact on stream biota, whereas even moderate nutrient enrichment may be ecologically harmful. Controlling diffuse pollution and associated land use stressors should be prioritized over restoration of in-stream habitat structure to improve the ecological condition of boreal streams. |
| ISSN | 00489697 |
| Volume Number | 544 |
| e-ISSN | 18791026 |
| Journal | Science of The Total Environment |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2016-02-15 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Aquatic Organisms Classification Biodiversity Environmental Monitoring Methods Water Pollution Statistics & Numerical Data Agriculture Animals Growth & Development Diatoms Ecosystem Fishes Invertebrates Rivers Chemistry Journal Article Research Support, Non-u.s. Gov't Discipline Environmental Science |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Waste Management and Disposal Pollution Environmental Engineering |
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