Holocene Lake Level Fluctuations Recorded in the Sediment Compositionof Lake Juusa, Southeastern Estonia

Punning, J-M; Koff, Tiiu; Kadastik, Ene; Mikomägi, Annika

doi:10.1007/s10933-005-6751-0

Cited by 35 publications

(30 citation statements)

References 25 publications

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“…The trend coincides with that described e.g. from Lake Bysjön (Digerfeldt, 1988), Lake Juusa (Punning et al, 2005) and is also in agreement with the data set presented by Harrison et al (1996). This also fi ts with the common understanding of Holocene climate having a dry and warm early phase and a fl uctuating middle phase followed by a cooler and wetter late phase, beginning ca.…”

Section: Lake Level Fl Uctuations During the Holocenesupporting

confidence: 91%

“…This is evidenced by overconsolidation of basal soil and remains of roots and other organic material in the lowermost parts of the cored sections. The decline in water level during the early Holocene is comparable to that recorded, e.g., from Lapland (Hyvärinen & Alhonen, 1994) and from Lake Juusa, Estonia (Punning et al, 2005). Overall drier conditions around the Baltic Sea at that time have also been demonstrated in a comprehensive review of Harrison et al (1996).…”

Section: Lake Level Fl Uctuations During the Holocenesupporting

confidence: 75%

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The paleolimnological development of the twin lakes Etujärvi and Takajärvi in Askola, southern Finland - implications for lake management

Valpola¹,

Salonen²

2006

Bull Geol Soc Finland

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The twin lakes Etujärvi and Takajärvi in Askola, southern Finland, are closely interconnected mesotrophic headwater lakes with a relatively small catchment area. Both of the lakes have suffered from eutrophication and its consequences. Remediation activities such as oxygenation and biomanipulation have not resolved the problems. In this study a large set of paleolimnological techniques (radiometric AMS dating, spherical carbonaceous particles analysis, sediment lithology, grain-size analysis, phosphorus fractionation, and diatom analysis) were applied to put together the development of the basin and its water level fl uctuations during the Holocene. The age for observed Trapa natans -horizons was determined, and lake management options were discussed.The studied lakes dried up after isolation from the Ancylus Lake at about 9500 cal. B.P. and remained at very low water level until ca. 8700-8500 cal. B.P. The mid-Holocene rise in water level resulted in fl uctuating water levels, and led to the most recent rise starting about 2500 cal. B.P. as wet and cool climate conditions prevailed. The pronounced water level fl uctuations led to the extensive growth of peat deposits surrounding the lake and probably also forced T. natans to disappear from lake fl ora. The unstable, erodable peat rims impact the lakes, causing heavy load of humic substances to the lake and presenting additional deterioration to their recreational value.

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Section: Lake Level Fl Uctuations During the Holocenesupporting

confidence: 91%

Section: Lake Level Fl Uctuations During the Holocenesupporting

confidence: 75%

The paleolimnological development of the twin lakes Etujärvi and Takajärvi in Askola, southern Finland - implications for lake management

Valpola¹,

Salonen²

2006

Bull Geol Soc Finland

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“…The mean depth is 3.7 m and the maximum depth is 6.0 m in the eastern part of the lake. Lake Juusa is a mesoeutrophic dimictic lake with strong stratification during spring-summer (Punning et al, 2005a). In summer the thermocline deepens from about 2.5 m in June to 3-3.5 m in July-August.…”

Section: Study Areamentioning

confidence: 99%

“…The main aim of this research was to study the spatio-temporal changes in the composition of the diatom flora in the sediments of small slightly alkaline closed lake Vä ike Juusa (hereafter L. Juusa) where widespread and detailed investigations (Koff, 2004;Punning et al, 2004Punning et al, , 2005aKoff et al, 2005) have been made to reconstruct the history of lake development. Good morphometric, litholologic, granulometric and geochemical data including a trustful curve of water-level fluctuations throughout the Holocene give an opportunity to research the composition of diatoms in surface sediments and cores and to understand how the species are distributed based on their relationship to water depth.…”

Section: Introductionmentioning

confidence: 99%

Diatom assemblages in sediments of Lake Juusa, Southern Estonia with an assessment of their habitat

Punning

Puusepp

2007

Hydrobiologia

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Diatom analysis of surface sediments and two sediment cores from different sedimentation areas of a small closed lake was undertaken with the aim of acquiring knowledge on the dependence of the distribution of diatom assemblages on lake bathymetry. Lake Juusa was selected for the study because we have for this lake a large data set about the lithological composition of sediments and macrofossil and cladoceran records for the Holocene. A high carbonate content (20-60%) in the sediment sequence indicates high carbonacity and relatively stable pH values during the Holocene. On the basis of comprehensive analysis, abrupt water-level fluctuations and changes in the trophic status were established. Results of this study showed that the fluctuations of the water-level were the leading factor determining the habitats of diatom assemblages in the lake. In the surface sediment samples planktonic species such as Cyclotella spp., Stephanodiscus spp. and Aulacoseira spp. had a depth optimum at 3-4 m and the most abundant periphytic taxa were distributed mostly at depths shallower than 3.5 m. The same regularity was established in sediment cores where a good correlation between planktonic species and lake water depth was found in sediments accumulated at water depths >4 m. Lake Juusa appears to be a proper site for detailed environmental reconstructions over the Holocene, and the results will give us a good opportunity to analyse the history of waterlevel fluctuations in other small Estonian lakes.

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“…Yet, studies of the fluctuations in lake water levels in the Baltic region (Latvia, Estonia and Belarus; Saarse, Harrison 1992;Koff et al 2005;Punning et al 2005;Novik et al 2010) have shown different patterns in water level fluctuation. During the Late Glacial and Early Holocene, some common patterns in lake level fluctuation were detected, whereas during the latter half of the Holocene, the changes in water level were generally asynchronous.…”

Section: Introductionmentioning

confidence: 99%

Main drivers affecting the Holocene sedimentary record – implications from small lake in Latvia

Terasmaa¹,

Puusepp²,

Vandel³

et al. 2016

Baltica

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A multi-indicator paleolimnological study of sediments from Lake Ķūži (central Latvia) was used to obtain a comprehensive record of environmental changes in the Holocene. Periodicity in the changes and the main drivers (lake basin development, catchment properties, climate, human activities) of the sedimentary record was studied. In order to comprehend the whole-lake sedimentation during the Holocene, a detailed multiindicator record from the central part of the lake was integrated with records of sediment mass accumulation rates from four cores from different parts of the lake and a GPR (ground-penetrating radar) survey of the lake basin. The observed changes in the sedimentation regime that took place during the early Holocene are strongly linked with variations in climatic conditions, but the catchment and lake basin also played an important role. In the middle Holocene the water level was stable and the lake was influenced by climate mediated through changes in the catchment vegetation. Around 5 000 cal. BP sedimentation pattern changed, and three of the four main drivers made a comparably strong impact on the sedimentary signal. Since 2 000 cal. BP multiple indicators point to a major disturbance clearly related to human activity, which conceals the impact of the natural drivers.

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Holocene Lake Level Fluctuations Recorded in the Sediment Compositionof Lake Juusa, Southeastern Estonia

Cited by 35 publications

References 25 publications

The paleolimnological development of the twin lakes Etujärvi and Takajärvi in Askola, southern Finland - implications for lake management

The paleolimnological development of the twin lakes Etujärvi and Takajärvi in Askola, southern Finland - implications for lake management

Diatom assemblages in sediments of Lake Juusa, Southern Estonia with an assessment of their habitat

Main drivers affecting the Holocene sedimentary record – implications from small lake in Latvia

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