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Temporal and spatial trends for trace metals in streams and rivers across Sweden (1996-2009)

Huser, Brian and Köhler, Stephan and Wilander, Anders and Johansson, Kjell and Fölster, Jens (2011). Temporal and spatial trends for trace metals in streams and rivers across Sweden (1996-2009). Biogeosciences. 8:7, 1813-1823
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Official URL: http://dx.doi.org/10.5194/bg-8-1813-2011

Abstract

Long term data series (1996 through 2009) for trace metals were analyzed from a large number of streams and rivers across Sweden varying in tributary watershed size from 0.05 to 48 193 km(2). The final data set included 139 stream sites with data for arsenic (As), cobalt (Co), copper (Cu), chromium (Cr), nickel (Ni), lead (Pb), zinc (Zn), and vanadium (V). Between 7% and 46% of the sites analyzed showed significant trends according to the seasonal Kendall test. However, in contrast to previous studies and depositional patterns, a substantial portion of the trends were positive, especially for V (100%), As (95%), and Pb (68%). Other metals (Zn and Cr) generally decreased, were mixed (Ni and Zn), or had very few trends (Co) over the study period. Trends by region were also analyzed and some showed significant variation between the north and south of Sweden. Regional trends for both Cu and Pb were positive (60% and 93%, respectively) in the southern region but strongly negative (93% and 75 %, respectively) in the northern region. Kendall's tau coefficients were used to determine dependence between metals and potential in-stream drivers including total organic carbon (TOC), iron (Fe), pH, and sulphate (SO(4)(2-)). TOC and Fe correlated positively and strongly with As, V, Pb, and Co while pH and SO(4)(2) generally correlated weakly, or not at all with the metals studied.

Authors/Creators:Huser, Brian and Köhler, Stephan and Wilander, Anders and Johansson, Kjell and Fölster, Jens
Title:Temporal and spatial trends for trace metals in streams and rivers across Sweden (1996-2009)
Series/Journal:Biogeosciences (1726-4189)
Year of publishing :2011
Volume:8
Number:7
Page range:1813-1823
Number of Pages:11
Publisher:European Geosciences Union (EGU)
ISSN:1726-4189
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:M Aquatic sciences and fisheries > M40 Aquatic ecology
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Geosciences, Multidisciplinary
(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Geochemistry
(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Oceanography, Hydrology, Water Resources
Keywords:trace metals, streams, rivers, Sweden, biotic processes, abiotic processess, riverine systems, in-stream chemistry, hydrology, climate variability, changes in land use
URN:NBN:urn:nbn:se:slu:epsilon-e-1592
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-1592
Additional ID:
Type of IDID
Web of Science (WoS)000294153700005
DOI10.5194/bg-8-1813-2011
ID Code:10715
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:21 Aug 2013 12:45
Metadata Last Modified:12 Dec 2014 10:07

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