Limnological responses to environmental changes during the last 3,000 years revealed from a varved sequence of Lake Lubińskie (western Poland)

Bonk, Alicja; Piotrowska, Natalia; Żarczyński, Maurycy; Enters, Dirk; Makohonienko, Mirosław; Rzodkiewicz, Monika; Tylmann, Wojciech

doi:10.1016/j.catena.2023.107053

Cited by 5 publications

(10 citation statements)

References 70 publications

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“…The mean water depth is 8.8 m. The lake is fed by several periodic streams along with the groundwater, and has one outflow in the northern part. The lake is naturally eutrophic (Bonk et al, 2023), with anoxic conditions at the water-sediment boundary during most of the year.…”

Section: Methodsmentioning

confidence: 99%

“…The chronology of Lake Lubińskie sediments has been already established using a combination of varve counting, radiocarbon dating, and age-depth Bayesian modeling (Bonk et al, 2023). The results showed that the investigated core covers the time period from 2007 CE (the year of coring) back to 946 +113 / −144 BCE (Figure 1b).…”

Section: Methodsmentioning

confidence: 99%

“…The concentrations of total inorganic carbon (TIC) were measured with a SoliTIC (Elementar) module coupled to the elemental analyzer. Details of the sample preparation steps can be found in Bonk et al (2023). Total organic carbon (TOC) was calculated by the subtraction of inorganic carbon from the total carbon.…”

Section: Elemental Analysismentioning

confidence: 99%

“…The prepared pollen slides were examined until a minimum of 500 tree, shrub and terrestrial herbaceous pollen grains was reached in each sample (AP + NAP = 100%, excluding Cyperaceae). The simplified pollen diagram has been already published (Bonk et al, 2023), thus the extended version is presented herein.…”

Section: Pollen Non-pollen Palynomorphs and Macrocharcoalmentioning

confidence: 99%

“…Finally, cereal pollen grains gained significant importance in the Early Medieval Period associated with the Slavic colonization. The agriculture led to the increased delivery of terrestrial material to the lake bottom (increased TOC/TN; Figures 2 and 6) which is also reflected in the better ventilation of bottom waters (Figure 2 and Bonk et al, 2023). However, before the western Slavic tribes arrived in the area of Lake Lubińskie, the pollen data suggests some forest recovery (ca.…”

Section: Antiquity (450 Bce-1/1 Bce/ce) -Migrationmentioning

confidence: 99%

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Human-induced fires and land-use change in Lubusz Land (western Poland) derived from Lake Lubińskie sedimentary record

Bonk,

Makohonienko,

Tylmann

2023

The Holocene

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Sediments of Lake Lubińskie were investigated to track human-induced vegetation and fire activity changes in Lubusz Land (western Poland). Geochemical data, as well as pollen, macrocharcoal, and statistical analyses (CONISS, CharAnalysis, PCA, BINCOR) allowed us to recognize the major phases of the human impact. At the beginning of the investigation period, 3000 years ago, the area had already experienced disturbances from humans caused by the Lusatian and Przeworsk cultures, followed by western Slavs, and modern society. Land cover changes were mostly related to deforestation and gaining arable lands. The forest communities shrank substantially also due to timber demand from the growing society. However, the pollen record shows that within the last ~50 years the area experienced forest regeneration. Wildfires played an important role in shaping the landscape in the area of Lake Lubińskie. Overall, 23 fires were identified within the profile showing relatively high fire frequencies (up to 4.8 fires per 500 years) between 600 −38/+36 BCE and 1 ± 206 CE as well as between 1065 ± 98 CE and 1380 ± 92 CE. The highest fire frequency was observed between the 1000s and mid-1400s, showing decreased fire return interval (FRI) and increased charcoal flux as well as progressive deforestation. These changes were related to the establishment of villages (e.g., Lubin village) and the presence of the Joannites. Fire was most commonly used as a land management tool to gain patches of land for agrarian purposes. PCA and BINOCR analyses suggest that most of the fires were set by humans, but natural causes of ignition cannot be excluded. The land-use changes affected the vegetation in the region, causing increased erosion and shifts in the geochemistry of the lake reflected in better bottom waters ventilation and progressive eutrophication.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Elemental Analysismentioning

confidence: 99%

Section: Pollen Non-pollen Palynomorphs and Macrocharcoalmentioning

confidence: 99%

Section: Antiquity (450 Bce-1/1 Bce/ce) -Migrationmentioning

confidence: 99%

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Human-induced fires and land-use change in Lubusz Land (western Poland) derived from Lake Lubińskie sedimentary record

Bonk,

Makohonienko,

Tylmann

2023

The Holocene

Self Cite

View full text Add to dashboard Cite

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Inorganic geochemistry of lake sediments: A review of analytical techniques and guidelines for data interpretation

Bertrand,

Tjallingii,

Kylander

et al. 2024

Earth-Science Reviews

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Human-Altered Water and Carbon Cycles in the Lake Yangzong Basin since the Yuan Dynasty

Li,

Jing,

Zhang

et al. 2024

Water

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Due to the dual influence of climate change and human activities, the water cycle patterns in the lakesheds of the Yunnan karst plateau are undergoing significant changes, leading to increasingly prominent ecological issues. In the history of Lake Yangzong, an artificial water-diversion channel was excavated, altering the lake basin structure. Human activities have intensified, posing severe challenges to water resource supply and water security in recent decades. To investigate the significant increase in human activities, the temporal and phase changes, and the resulting transformation of the water and carbon cycles in the Lake Yangzong basin, we applied X-ray fluorescence spectroscopy (XRF) to scan elements continuously in a 10.2 m sediment core from this lake. By combining correlation analysis, principal component analysis (PCA), core chronology, and total organic carbon (TOC) content, we reconstructed the historical sequence of geochemical element contents in the Lake Yangzong catchment over the past 13,000 years. The results show that PC1 and PC2 contribute 78.4% and 10.3%, respectively, suggesting that erosion intensity is the main factor influencing the lake sedimentation process. From 13,400 to 680 cal a BP (calibrated years before the present), the sedimentation process in Lake Yangzong was mainly controlled by climatic conditions, with vegetation degradation during cold periods and relatively high erosion intensity in the watershed. During the Yuan dynasty, a province was established by the central government in Yunnan, promoting settlement and attracting a large number of immigrants from other provinces to Yunnan. Human activities in the Lake Yangzong basin began to intensify, surpassing natural changes and becoming the dominant force influencing the sedimentation process. In the Ming and Qing dynasties, the population and cultivated land area in Yunnan further increased, resulting in the significant exacerbation of erosion and soil loss in the watershed due to vegetation destruction. In the year 1388, the Tangchi Canal was excavated, transforming Lake Yangzong to an outflow lake, causing Ca2+ to be lost through the Tangchi Canal and preventing the formation of precipitation due to oversaturation. The research results indicate that human activities in the Lake Yangzong area have intensified since the Yuan dynasty, leading to increased erosion intensity. The excavation of the outflow canal transformed Lake Yangzong from an inland lake basin into an outflow state, simultaneously generating a significant transformation in the water and carbon cycling patterns in the watershed.

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Limnological responses to environmental changes during the last 3,000 years revealed from a varved sequence of Lake Lubińskie (western Poland)

Cited by 5 publications

References 70 publications

Human-induced fires and land-use change in Lubusz Land (western Poland) derived from Lake Lubińskie sedimentary record

Human-induced fires and land-use change in Lubusz Land (western Poland) derived from Lake Lubińskie sedimentary record

Inorganic geochemistry of lake sediments: A review of analytical techniques and guidelines for data interpretation

Human-Altered Water and Carbon Cycles in the Lake Yangzong Basin since the Yuan Dynasty

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