Recent history of Lake Ladoga

Davydova, N. A.; Kurochkina, Anna A.; Trifonova, I. S.

doi:10.1007/978-94-009-7290-2_44

Cited by 3 publications

(5 citation statements)

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“…Lakes in this region were formed during the last glacial period (110–11.7k y.b.p.) (Zvereva et al ; Davydova et al ). The lakes remain stratified during the winter and summer months but turn over twice annually (dimictic) (Zvereva et al ; Davydova et al ).…”

Section: Methodsmentioning

confidence: 99%

“…(Zvereva et al ; Davydova et al ). The lakes remain stratified during the winter and summer months but turn over twice annually (dimictic) (Zvereva et al ; Davydova et al ). Rain and snowmelt feeds the lakes, while groundwater influx is limited by underlying permafrost (Davydova et al ).…”

Section: Methodsmentioning

confidence: 99%

“…The lakes remain stratified during the winter and summer months but turn over twice annually (dimictic) (Zvereva et al ; Davydova et al ). Rain and snowmelt feeds the lakes, while groundwater influx is limited by underlying permafrost (Davydova et al ). Lakes of the Bol'shezemel'skaya tundra region are generally considered pristine given their remote distance from industry and human settlements.…”

Section: Methodsmentioning

confidence: 99%

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Multidecadal climate‐induced changes in Arctic tundra lake geochemistry and geomorphology

Drake

Holmes

Zhulidov³

et al. 2018

Limnology & Oceanography

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High-latitude lakes are sensitive indicators of climate and important ecological components of Northern landscapes. The response of Arctic lakes to accelerated 20 th century warming has largely been inferred from paleolimnological and shorter-term observational studies (< 20 yr). Here, we present a long-term observational dataset outlining a suite of chemical, biological, and physical changes in three Russian tundra lakes over a 43-yr period (1953-1996). In all three lakes, epilimnetic water temperature, alkalinity, and calculated pCO 2 , measured during the ice-free period in late summer, increased over time. Over the same period, the rates of primary and bacterial production increased significantly. Permafrost thaw at the base and margins of the lakes likely resulted in the observed increase in size, as measured by average depth, surface area, and total volume. The observed changes show strong correlation with temperature, suggesting an overall pronounced response to warming. Importantly, CO 2 sourced from either in situ or allochthonous respiration of thawed permafrost would indicate the destabilization of a large C reservoir.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Multidecadal climate‐induced changes in Arctic tundra lake geochemistry and geomorphology

Drake

Holmes

Zhulidov³

et al. 2018

Limnology & Oceanography

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“…Davydova et al 1983;Saarnisto & Gr€ onlund 1996;Subetto et al 1998Subetto et al , 2002Saarnisto 2012). Davydova et al 1983;Saarnisto & Gr€ onlund 1996;Subetto et al 1998Subetto et al , 2002Saarnisto 2012).…”

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Deglaciation history of Lake Ladoga (northwestern Russia) based on varved sediments

Gromig

Wagner

Wennrich

et al. 2019

Boreas

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Lake Ladoga in northwestern Russia is Europe's largest lake. The postglacial historyof the Ladogabasin is for the first time documented continuously with high temporal resolution in the upper 13.3 m of a sediment core (Co1309) from the northwestern part of the lake. We applied a multiproxy approach including radiographic imaging, (bio-) geochemical and granulometric analyses. Age control was established combining radiocarbon dating with varve chronology, the latter anchored to a correlated radiocarbon age from a lake close by. The age-depth model reveals the onset of glacial varve sedimentation at 13 910AE140 cal. a BP, when Lake Ladoga was part of the Baltic Ice Lake. Linear extrapolation of published retreat rates of the Scandinavian Ice Sheet provides a formation age of the Luga moraine close to Lake Ladoga's southern shore of 14.5-15.9 cal. ka BP, older than previously assumed. Varve sedimentation covers the Bølling/Allerød interstadial, the Younger Dryas stadial and the Early Holocene. Varvethickness variations, conjoined with grain-size and geochemical variations, inform about the relative position of the Scandinavian Ice Sheet and the climate during the deglaciation phase. The upper limit of the varved succession marks the change from glaciolacustrine to normal lacustrine sedimentation and post-dates the drainage of the Baltic Ice Lake aswell as the formation of the Salpausselk€ a II moraine north of Lake Ladoga, by c. 250 years. The Holocene sediment record is divided into three periods in the following order: (i) a lower transition zone between the Holocene boundary and c. 9.5 cal. ka BP, characterized by mostly massive sediments with low organic content, (ii) a phase with increased organic content from c. 9.5 to 4.5 cal. ka BP corresponding to the Holocene Thermal Maximum, and (iii) a phase with relatively stable sedimentation in a lacustrine environment from c. 4.5 cal. ka BP until present.

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“…In Lake Ladoga, the species of the Fragilaria capucina/vaucheriae complex, such as F. capucina, F. vaucheriae and F. gracilis Østrup, usually occupy subdominant positions in the benthic diatom assemblages [20,37]. A recent study showed that three other morphologically close species from the Fragilaria capucina/vaucheriae complex-F. sublanceolata-baikali, F. pectinalis and F. perminuta-are present in Lake Ladoga [9].…”

Section: Introductionmentioning

confidence: 99%

Quantitative Morphometric Analysis of Morphologically Similar Species of Fragilaria (Fragilariaceae, Bacillariophyta) Allows Detection of Non-Indigenous Taxa: A Case Study from Lake Ladoga (North of European Russia)

Rusanov,

Gololobova,

Kolobov

et al. 2023

Water

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In Lake Ladoga (northwestern Russia), we found a diatom, putatively Fragilaria sublanceolata-baikali, an endemic species from Lake Baikal (southeastern Siberia, Russia). To determine whether this population matches a previously recognized species from Lake Baikal and assess how it differs from other similar Fragilaria taxa, we studied the valve morphology of three morphologically similar Fragilaria populations (the putative F. sublanceolata-baikali, F. pectinalis and F. perminuta) sampled in Lake Ladoga, along with a population of F. sublanceolata-baikali sampled in Lake Baikal. We used light and scanning electron microscopy with a combination of traditional and geometric morphometric methods. To analyze covariation between the valve shape and size (i.e., allometry), we examined differences in the ontogenetic–allometric trajectories at both the interspecific and intraspecific levels. In addition, the effect of size correction of the valve shape on species differentiation was tested. Traditional morphometrics revealed that F. sublanceolata-baikali is distinguished from F. pectinalis and F. perminuta by valve length, while F. pectinalis and F. perminuta are distinguished by striae density. All three species of Fragilaria showed separate and parallel allometric trajectories. In contrast, the two populations of F. sublanceolata-baikali were on a common allometric trajectory, indicating the conspecificity between these populations. Prior to allometric correction, geometric morphometrics was not able fully discriminate between the three Fragilaria species. After allometric correction, the three Fragilaria species were clearly separated in a size-corrected morphospace, whereas the two populations of F. sublanceolata-baikali formed a tightly overlapping group. Thus, we conclude that geometric morphometrics can reliably distinguish between these morphologically similar species of Fragilaria, but only after accounting for allometric shape variation. Our study confirmed morphological similarity between the two geographically distant populations of F. sublanceolata-baikali, which indicates that this taxon can be considered as invasive in Lake Ladoga.

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Recent history of Lake Ladoga

Cited by 3 publications

References 1 publication

Multidecadal climate‐induced changes in Arctic tundra lake geochemistry and geomorphology

Multidecadal climate‐induced changes in Arctic tundra lake geochemistry and geomorphology

Deglaciation history of Lake Ladoga (northwestern Russia) based on varved sediments

Quantitative Morphometric Analysis of Morphologically Similar Species of Fragilaria (Fragilariaceae, Bacillariophyta) Allows Detection of Non-Indigenous Taxa: A Case Study from Lake Ladoga (North of European Russia)

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