A high-resolution record of Holocene primary productivity and water-column mixing from the varved sediments of Lake Żabińskie, Poland

Zander, Paul D.; Żarczyński, Maurycy; Vogel, Hendrik; Tylmann, Wojciech; Wacnik, Agnieszka; Sanchini, Andrea; Grosjean, Martín

doi:10.1016/j.scitotenv.2020.143713

Cited by 23 publications

(29 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4b). The importance of wind shear on Lake Żabińskie biogeochemical cycling has previously been identified in the studies of the Holocene sedimentary record of Lake Żabińskie (Zander et al, 2021; , 2014). A significant negative correlation between bacteriopheophytin and July windiness could be explained by increased turbidity during windy summers (and limited light at the chemocline) and/or a lowering of the anoxic boundary below the photic zone; both effects would limit growth of anoxygenic phototrophic bacteria.…”

Section: Relationships Between Varve Composition and Meteorological Conditionsmentioning

confidence: 88%

“…An annual cycle of sedimentation was described with algal blooms and Si deposition in spring, followed by calcite precipitation in spring and summer, then Fe and S enriched sediments in fall, and finally organic and lithogenic detritus (enriched in K and Ti) deposited in winter. Further investigations of the sedimentary record have documented changes to the lake mixing regime, trophy, and catchment erosion, with the most significant environmental changes occurring after major deforestation and the development of agriculture in the catchment during the 17 th century (Zander et al, 2021;Żarczyński et al, 2019;Hernández-Almeida et al, 2017;Wacnik et al, 2016;Bonk et al, 2016).…”

Section: Site Description and Core Collectionmentioning

confidence: 99%

“…; d.s. = dry sediments) using the calibration method described in Zander et al (2021). TChl is used as a proxy for total algal productivity (Rein and Sirocko, 2002;Leavitt and Hodgson, 2002), whereas Bphe is produced by anoxygenic phototrophic purple sulfur bacteria and is a specific biomarker for anoxic conditions overlapping with the photic zone (Butz et al, 2015;Sinninghe Damsté and Schouten, 2006).…”

Section: Geochemical Scanning Measurementsmentioning

confidence: 99%

“…S7). Over the Holocene, Bphe concentrations were closely linked to forest cover surrounding the lake, which affects wind exposure (Zander et al, 2021).…”

Section: Relationships Between Varve Composition and Meteorological Conditionsmentioning

confidence: 99%

See 3 more Smart Citations

Seasonal climate signals preserved in biochemical varves: insights from novel high-resolution sediment scanning techniques

Zander¹,

Żarczyński²,

Tylmann³

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

Abstract. Varved lake sediments are exceptional archives of paleoclimatic information due to their precise chronological control and annual resolution. However, quantitative paleoclimate reconstructions based on the biogeochemical composition of biochemical varves are extremely rare mainly because the climate-proxy relationships are complex, and obtaining biogeochemical proxy data at very high (annual) resolution is difficult. Recent developments in high-resolution hyperspectral imaging (HSI) of sedimentary pigment biomarkers combined with micro X-ray fluorescence (μXRF) elemental mapping make it possible to measure the structure and composition of varves at unprecedented resolution. This provides opportunities to explore (seasonal) climate signals preserved in biochemical varves and, thus, assess the potential for annual resolution climate reconstruction from biochemical varves. Here, we present a geochemical dataset including HSI-inferred sedimentary pigments and uXRF-inferred elements at very high spatial resolution (60 μm, i.e. > 100 data points per varve year) in varved sediments of Lake Żabińskie, Poland over the period 1966–2019 CE. We compare this data with local meteorological observations to explore and quantify how changing seasonal meteorological conditions influenced sediment composition and varve formation processes. Based on the dissimilarity of within-varve multivariate geochemical time series, we classified varves into four types. Multivariate analysis of variance shows that these four varve types were formed in years with significantly different seasonal meteorological conditions. Generalized additive models (GAMs) were used to infer seasonal climate conditions based on sedimentary variables. Spring and summer (MAMJJA) temperature were predicted using Ti and total C (R2adj = 0.55; cross-validated root mean square error (CV-RMSE) = 0.7 °C, 14.4%). Windy days from March to December (mean daily wind speed > 7 m/s) were predicted using mass accumulation rate (MAR) and Si (R2adj = 0.48; CV-RMSE = 19.0%). This study demonstrates that high-resolution scanning techniques are promising tools to improve our understanding of varve formation processes and climate-proxy relationships in biochemical varves. This knowledge is the basis for quantitative high-resolution paleoclimate reconstructions, and here we provide examples of calibration and validation of annual resolution seasonal weather inference from varve biogeochemical data.

show abstract

Section: Relationships Between Varve Composition and Meteorological Conditionsmentioning

confidence: 88%

Section: Site Description and Core Collectionmentioning

confidence: 99%

Section: Geochemical Scanning Measurementsmentioning

confidence: 99%

“…S7). Over the Holocene, Bphe concentrations were closely linked to forest cover surrounding the lake, which affects wind exposure (Zander et al, 2021).…”

Section: Relationships Between Varve Composition and Meteorological Conditionsmentioning

confidence: 99%

See 2 more Smart Citations

Seasonal climate signals preserved in biochemical varves: insights from novel high-resolution sediment scanning techniques

Zander¹,

Żarczyński²,

Tylmann³

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…RABD 670 (or similar) has been widely used as an index of green pigments and as a proxy for aquatic productivity in a wide variety of environments, including marine [ 9 , 23 ] and lake sediments [ 27 , 36 , 37 , 39 , 63 , 64 ], and over timespans greater than 100,000 years [ 65 ]. A modified version of the RABD Formula (2) flexibly utilizes the wavelength associated with maximal absorbance, which is preferable for reconstructions of total algal production [ 14 , 53 , 66 ]:

where R λ is the reflectance at the wavelength (λ), R 655–680min is the trough minimum (i.e., lowest reflectance value measured between 655 and 680 nm), X is the number of spectral bands between R 730 and the trough minimum, and Y is the number of spectral bands between the trough minimum and R 590 . Endpoint wavelengths (590 and 730 nm in Equation (2)) are selected by examining spectral endmembers to identify the edges of the absorption trough and should be selected from wavelengths that show minimal variability throughout the sample material.…”

Section: Biogeochemical Interpretation Of Sediment Reflectance Spectramentioning

confidence: 99%

Scanning Hyperspectral Imaging for In Situ Biogeochemical Analysis of Lake Sediment Cores: Review of Recent Developments

2022

Self Cite

View full text Add to dashboard Cite

Hyperspectral imaging (HSI) in situ core scanning has emerged as a valuable and novel tool for rapid and non-destructive biogeochemical analysis of lake sediment cores. Variations in sediment composition can be assessed directly from fresh sediment surfaces at ultra-high-resolution (40–300 μm measurement resolution) based on spectral profiles of light reflected from sediments in visible, near infrared, and short-wave infrared wavelengths (400–2500 nm). Here, we review recent methodological developments in this new and growing field of research, as well as applications of this technique for paleoclimate and paleoenvironmental studies. Hyperspectral imaging of sediment cores has been demonstrated to effectively track variations in sedimentary pigments, organic matter, grain size, minerogenic components, and other sedimentary features. These biogeochemical variables record information about past climatic conditions, paleoproductivity, past hypolimnetic anoxia, aeolian input, volcanic eruptions, earthquake and flood frequencies, and other variables of environmental relevance. HSI has been applied to study seasonal and inter-annual environmental variability as recorded in individual varves (annually laminated sediments) or to study sedimentary records covering long glacial–interglacial time-scales (>10,000 years).

show abstract

Using palaeolimnology to guide rehabilitation of a culturally significant lake in New Zealand

Short

Tibby

Vandergoes

et al. 2022

Aquatic Conservation

View full text Add to dashboard Cite

Lakes are becoming degraded at an accelerating rate owing to human activity, and understanding their past ecology is necessary for lake management and rehabilitation. Palaeolimnology provides numerous methods that enable the historical state of lakes to be determined. New Zealand provides an ideal setting in which to do this as human modification of the landscape occurred later here than in most regions of the world (approx. 1300 CE). Lake Oporoa is a shallow lake that is highly significant to the local indigenous Māori community. This study used multiple proxy palaeolimnology to explore how lake ecology shifted following Māori and European settlement in the catchment, and how palaeolimnological data can be used to inform lake rehabilitation and conservation measures, alongside the desires of the indigenous community. Sedimentary pollen, diatoms, bacterial communities, and elemental and hyperspectral imaging scanning were used to infer ecological changes in the lake and catchment from pre‐human times to present. Following Māori settlement (approx. 1620 CE) there was gradual vegetation change and a rapid shift in diatom and bacterial assemblages, but not in phytoplankton pigments or sediment geochemistry. An increasing abundance of diatom taxa Discostella stelligera and Staurosirella cf. ovata indicates early nutrient enrichment. European pastoralism from approximately 1840 CE resulted in further deforestation, and all proxies show evidence for enhanced primary productivity driven by a combination of nutrient enrichment and changing lake levels, particularly since the 1960s. This has caused degradation in water quality and is likely to have contributed to the decline in populations of tuna (eel, Anguilla spp.). Conversations with local Māori, together with the palaeolimnological results, indicate that a culturally acceptable and realistic rehabilitation target for Lake Oporoa aligns with ecological conditions in the 1950s. The palaeoecological data provide information to guide catchment and lake revegetation and other methods of nutrient abatement, with the eventual aim of restoring culturally important tuna and native fish populations.

show abstract

A high-resolution record of Holocene primary productivity and water-column mixing from the varved sediments of Lake Żabińskie, Poland

Cited by 23 publications

References 77 publications

Seasonal climate signals preserved in biochemical varves: insights from novel high-resolution sediment scanning techniques

Seasonal climate signals preserved in biochemical varves: insights from novel high-resolution sediment scanning techniques

Scanning Hyperspectral Imaging for In Situ Biogeochemical Analysis of Lake Sediment Cores: Review of Recent Developments

Using palaeolimnology to guide rehabilitation of a culturally significant lake in New Zealand

Contact Info

Product

Resources

About