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WFRF:(Salonen J. Sakari)
 

Sökning: WFRF:(Salonen J. Sakari) > Evaluating environm...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00004096naa a2200469 4500
001oai:DiVA.org:su-147281
003SwePub
008170920s2014 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1472812 URI
0247 a https://doi.org/10.1007/s10933-014-9795-12 DOI
040 a (SwePub)su
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Shala, Shyhreteu Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)4 aut0 (Swepub:su)shsh4513
2451 0a Evaluating environmental drivers of Holocene changes in water chemistry and aquatic biota composition at Lake Loitsana, NE Finland
264 c 2014-11-07
264 1b Springer Science and Business Media LLC,c 2014
338 a print2 rdacarrier
520 a This study presents a detailed analysis of geochemical and biotic proxies in a lake sediment profile to assess the effects of local and regional environmental drivers on the Holocene development of Lake Loitsana, situated in the northern boreal forest of NE Finland. Multi-proxy studies, in particular those that include a detailed plant macrofossil record, from the part of the northern boreal zone of Fennoscandia which has not been affected by treeline fluctuations, are scarce and few of these records date back to the earliest part of the Holocene. A 9-m sediment sequence of gyttja overlying silts representing the last c. 10,700 cal year, allowed for a high-resolution study with emphasis on the early to mid-Holocene lake history. The lacustrine sediments were studied using lithology, loss-on-ignition and C/N ratios, micro- and macro-fossils of aquatic and wetland taxa, diatoms, chironomids and accelerator mass spectrometry C-14 dating on terrestrial plant macrofossils. Our study shows that the local development at Loitsana was complex and included a distinct glacial lake phase and subsequent drainage, a history of fluvial input affected by nearby wetland expansion, and lake infilling in an eventual esker-fed shallow lake. Enhanced trophic conditions, due to morphometric eutrophication, are recorded as Glacial Lake Sokli drained and open water conditions became restricted to a relatively small Lake Loitsana depression. pH appears to have been stable throughout the Holocene with a well-buffered lake due to the local carbonatite bedrock (Sokli Carbonatite Massif). The fossil assemblage changes are best explained by a complex mixture of drivers, including water-body conditions (i.e. depth, turbidity and turbulence), rate of sediment input, and the general infilling of the lake, highlighting the need to carefully evaluate the possible influence of such local factors as palaeoenvironmental conditions are reconstructed based on aquatic proxies.
650 7a NATURVETENSKAPx Geovetenskap och miljövetenskap0 (SwePub)1052 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciences0 (SwePub)1052 hsv//eng
653 a Aquatic macrophytes
653 a Chironomidae
653 a Diatoms
653 a Pollen
653 a Sediment geochemistry
653 a Local lake development
653 a Holocene
653 a Northern boreal zone
653 a NE Finland
7001 a Helmens, Karin F.u Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)4 aut0 (Swepub:su)khelm
7001 a Luoto, Tomi P.4 aut
7001 a Väliranta, Minna4 aut
7001 a Weckström, Jan4 aut
7001 a Salonen, J. Sakari4 aut
7001 a Kuhry, Peteru Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)4 aut0 (Swepub:su)pkuhr
7102 a Stockholms universitetb Institutionen för naturgeografi och kvartärgeologi (INK)4 org
7730 t Journal of Paleolimnologyd : Springer Science and Business Media LLCg 52:4, s. 311-329q 52:4<311-329x 0921-2728x 1573-0417
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-147281
8564 8u https://doi.org/10.1007/s10933-014-9795-1

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