Document Detail

Effects of hydromorphology and riparian vegetation on the sediment quality of agricultural low-order streams: consequences for stream restoration.
MedLine Citation:
PMID:  22945657     Owner:  NLM     Status:  Publisher    
Intensive agricultural land use imposes multiple pressures on streams. More specifically, the loading of streams with nutrient-enriched soil from surrounding crop fields may deteriorate the sediment quality. The current study aimed to find out whether stream restoration may be an effective tool to improve the sediment quality of agricultural headwater streams. We compared nine stream reaches representing different morphological types (forested meandering reaches vs. deforested channelized reaches) regarding sediment structure, sedimentary nutrient and organic matter concentrations, and benthic microbial respiration. Main differences among reach types were found in grain sizes. Meandering reaches featured larger mean grain sizes (50-70 μm) and a thicker oxygenated surface layer (8 cm) than channelized reaches (40 μm, 5 cm). Total phosphorous amounted for up to 1,500 μg g(-1) DW at retentive channelized reaches and 850-1,050 μg g(-1) DW at the others. While N-NH(4) accumulated in the sediments (60-180 μg g(-1) DW), N-NO(3) concentrations were generally low (2-5 μg g(-1) DW). Benthic respiration was high at all sites (10-20 g O(2) m(-2) day(-1)). Our study shows that both hydromorphology and bank vegetation may influence the sediment quality of agricultural streams, though effects are often small and spatially restricted. To increase the efficiency of stream restoration in agricultural landscapes, nutrient and sediment delivery to stream channels need to be minimized by mitigating soil erosion in the catchment.
Bernadette Teufl; Gabriele Weigelhofer; Jennifer Fuchsberger; Thomas Hein
Related Documents :
9130487 - Air pollution and allergy: experimental studies on modulation of allergen release from ...
23224907 - Effect of isobutanol on toluene biodegradation in nitrate amended, sulfate amended and ...
16877457 - Pollen-stigma interference in two gynodioecious species of lamiaceae with intermediate ...
23572727 - Effect of map on microbiological quality of mozzarella cheese stored in different packa...
25092117 - A novel inhibitor of cytokinin degradation (incyde) influences the biochemical paramete...
18205817 - Differences in vegetation composition and plant species identity lead to only minor cha...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-9-4
Journal Detail:
Title:  Environmental science and pollution research international     Volume:  -     ISSN:  1614-7499     ISO Abbreviation:  Environ Sci Pollut Res Int     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-9-4     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9441769     Medline TA:  Environ Sci Pollut Res Int     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
WasserCluster Lunz GmbH, 3293, Lunz am See, Austria.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Kinetics of Remazol Black B adsorption onto carbon prepared from sugar beet pulp.
Next Document:  Responses of juvenile European flounder (Platichthys flesus) to multistress in the Vilaine estuary, ...