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Isotopic composition of individual hydrobiidae gastropods from neotropical lakes Esmeralda and Chichancanab in the Maya Cochuah region, Mexico: implications for palaeolimnological research. 墨西哥玛雅Cochuah地区新热带湖泊Esmeralda和Chichancanab中腹足类水生动物个体的同位素组成:古湖泊学研究的意义。
IF 1.3 3区 地球科学
Journal of Paleolimnology Pub Date : 2026-01-01 Epub Date: 2026-03-19 DOI: 10.1007/s10933-026-00385-3
Haydar B Martinez-Dyrzo, Matthew D Jones, Sarah E Metcalfe, Melanie J Leng, Roger Medina-Gonzalez
{"title":"Isotopic composition of individual hydrobiidae gastropods from neotropical lakes Esmeralda and Chichancanab in the Maya Cochuah region, Mexico: implications for palaeolimnological research.","authors":"Haydar B Martinez-Dyrzo, Matthew D Jones, Sarah E Metcalfe, Melanie J Leng, Roger Medina-Gonzalez","doi":"10.1007/s10933-026-00385-3","DOIUrl":"https://doi.org/10.1007/s10933-026-00385-3","url":null,"abstract":"<p><p>Most lake-carbonate-isotope records from the Maya Lowlands are based on picking fossil carbonate ostracods and gastropods, often using the species <i>Pyrgophorus coronatus,</i> and then combining individual specimens from a single core layer to provide a composite sample. What has been left relatively unexplored is the variability between individual shells and the impact this might have on the values obtained from such composite samples. Here, the stable carbon and oxygen isotope signatures of modern <i>P. coronatus,</i> a littoral and detritivore species, and other Hydrobiidae taxa (<i>Aroapyrgus</i> sp. and <i>Tryonia</i> sp.) found in Lake Esmeralda and its much larger sister lake Chichancanab, in the Northern Maya Lowlands (also called Mayab or Yucatan Peninsula), were analysed to explore some of the environmental variables that might affect isotope composition. In addition, the carbon and oxygen isotope values derived from individual downcore gastropod shells were compared with those from bulk fine-fraction carbonate sediment from a core from Lake Esmeralda covering the last c. 6600 years. The results show that the median oxygen isotope value of a set of shells collected for a single stratigraphic layer tends to be about the same as the bulk sediment, even though their individual values can present a bimodal distribution, which might represent changes between dry and rainy seasons across the sample's period. In addition, no significant difference in the oxygen isotope values was found in using a particular Hydrobiidae taxon over another, indicating a lack of significant vital effects. The carbon isotopic signature of modern shells varies with location within the lake, and shows relatively little variability down core, suggesting non-climatic factors may be more dominant in controlling shell carbonate δ<sup>13</sup>C values in these systems.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1007/s10933-026-00385-3.</p>","PeriodicalId":16658,"journal":{"name":"Journal of Paleolimnology","volume":"74 2","pages":"5"},"PeriodicalIF":1.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12999685/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147498482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Combine, assign or delete? How to resolve different levels of taxonomic identification in chironomid datasets. 合并、分配或删除?如何解决手拟虫数据集中不同层次的分类鉴定问题。
IF 1.3 3区 地球科学
Journal of Paleolimnology Pub Date : 2026-01-01 Epub Date: 2026-03-30 DOI: 10.1007/s10933-026-00387-1
Oliver Heiri, Stefan Engels
{"title":"Combine, assign or delete? How to resolve different levels of taxonomic identification in chironomid datasets.","authors":"Oliver Heiri, Stefan Engels","doi":"10.1007/s10933-026-00387-1","DOIUrl":"https://doi.org/10.1007/s10933-026-00387-1","url":null,"abstract":"<p><p>The analysis of fossil biotic remains in lake sediment records allows for the reconstruction of past ecosystem dynamics and as such forms a powerful tool for understanding ecosystem processes and environmental change on a range of spatial and temporal scales. However, when producing palaeoecological datasets, analysts are often not able to assign all specimens to morphotypes at the highest taxonomic resolution. As a result, datasets containing unprocessed or raw counts usually include categories of identification across multiple different taxonomic levels (e.g. species morphotype, genus, tribe or even family level), also for fossil remains that may actually have originated from the same taxon (e.g. the same species or species morphotype). Whilst different strategies to deal with this problem have emerged over the years, it is rarely described in papers how analysts dealt with this issue, and how datasets were processed from raw counts to a final dataset used for palaeoecological interpretation, numerical analysis or quantitative inference. Using chironomid identifications as an example, we here describe the four main strategies for dealing with such multi-level identifications that can be applied to unprocessed count data with different levels of taxonomic detail: combining, retaining, deleting and assigning. We discuss advantages and disadvantages of each of these strategies and illustrate their impacts on palaeoecological analyses using both theoretical and practical examples. We conclude that there is no one optimal way to deal with the issue of incomplete or multi-level taxonomic identifications of fossils that may have originated from the same taxon, but that analysts will have to determine the strategy that best befits their project on a case-by-case basis, taking into account the type and quality of data they are working with, as well as the overall aims of their research project. We recommend that the choice of strategy (or combined strategies) is clearly described in the form of a brief statement in the Methods section of manuscripts where primary data are presented and that ideally both the unprocessed raw count data and the processed data used for ecological and numerical analyses are archived where publication outlets allow for this. Whilst we use chironomid research as the primary example throughout this manuscript, the proposed strategies and recommendations are relevant to a wide range of microfossil groups.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1007/s10933-026-00387-1.</p>","PeriodicalId":16658,"journal":{"name":"Journal of Paleolimnology","volume":"74 2","pages":"6"},"PeriodicalIF":1.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13035590/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147592863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The recent diatom-based paleolimnology of Lake Michigan. 最近密西根湖以硅藻为基础的古湖泊学。
IF 1.7 3区 地球科学
Journal of Paleolimnology Pub Date : 2025-01-01 Epub Date: 2025-06-03 DOI: 10.1007/s10933-025-00363-1
Euan D Reavie, Andrew J Bramburger, Meijun Cai
{"title":"The recent diatom-based paleolimnology of Lake Michigan.","authors":"Euan D Reavie, Andrew J Bramburger, Meijun Cai","doi":"10.1007/s10933-025-00363-1","DOIUrl":"10.1007/s10933-025-00363-1","url":null,"abstract":"<p><p>Quantitative analysis of siliceous microfossils in a dated sediment core from Lake Michigan reveals the anthropogenic history of pelagic conditions from the last ~ 160 years. Sediments deposited before the twentieth century contained low diatom abundances comprising species associated with oligotrophic conditions. Diatom-assemblage reorganization in the early to mid-twentieth century resulted in an increase in diatom-model-inferred water-column-phosphorus concentrations associated with cultural eutrophication. In recent decades, better nutrient management and water-quality recovery drove a decline of high-nutrient indicating diatom taxa. The most recent two decades manifest the effects of the extensive dreissenid invasion (a continued reduction in diatom-accumulation rate) and likely atmospheric warming (the rise in summer-diatom taxa representing a longer summer stratification and ice-free period). Like many areas of the Great Lakes basin, Lake Michigan's paleolimnological sequence reflects the widespread eutrophication of the twentieth century, followed by remediation and a modern condition affected by multiple stressors.</p>","PeriodicalId":16658,"journal":{"name":"Journal of Paleolimnology","volume":"73 4","pages":"347-360"},"PeriodicalIF":1.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12241298/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144626581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Direct detection of phycocyanin in sediments by hyperspectral imaging. 高光谱成像技术直接检测沉积物中的藻蓝蛋白。
IF 1.7 3区 地球科学
Journal of Paleolimnology Pub Date : 2025-01-01 Epub Date: 2024-12-30 DOI: 10.1007/s10933-024-00350-y
Giulia Wienhues, Petra Zahajská, Daniela Fischer, Tobias Schneider, Martin Grosjean
{"title":"Direct detection of phycocyanin in sediments by hyperspectral imaging.","authors":"Giulia Wienhues, Petra Zahajská, Daniela Fischer, Tobias Schneider, Martin Grosjean","doi":"10.1007/s10933-024-00350-y","DOIUrl":"10.1007/s10933-024-00350-y","url":null,"abstract":"<p><p>Cyanobacteria are ubiquitous aquatic organisms with a remarkable evolutionary history reaching as far as 1.9 Ga. They play a vital role in ecosystems yet also raise concerns due to their association with harmful algal blooms. Understanding the historical patterns and drivers behind these blooms is crucial for effective ecosystem management. Lake-sediment cores are valuable natural environmental archives, recording the histories of such blooms. Among others, phycocyanin, a pigment specific to cyanobacteria, emerges as a promising biomarker for reconstructing past cyanobacterial bloom events. However, due to the physicochemical properties of phycocyanin, there is no validated method available to extract and measure this pigment from complex sediment matrix. This study explores the applicability of hyperspectral imaging (HSI), a non-destructive technique, as a novel approach for high resolution <i>in-situ</i> detection and quantification of phycocyanin in lake sediments. Our experiments show that phycocyanin can be detected by HSI with an absorption trough at 620 nm (relative absorption band depth, RABD<sub>620</sub>). We established a semi-quantitative calibration of the spectral index RABD<sub>620</sub> by conducting spiking experiments with phycocyanin standard (known phycocyanin mass) on organic-rich and mineral-rich sediments of varying water contents. We also assessed potential interference from chlorophyll <i>a</i>, another photosynthetic pigment, ensuring the reliability of hyperspectral phycocyanin measurements. Our findings demonstrate a significant correlation (R<sup>2</sup> ranging from 0.37 to 0.997) between the RABD<sub>620</sub> index and associated phycocyanin amounts in organic-rich and minerogenic sediments. This indicates the potential of the spectral index to directly measure <i>in-situ</i> biomarker concentrations on split sediment cores. Although confounding factors such as water and chlorophyll <i>a</i> content can influence the spectral signal, this method offers a rapid and non-destructive approach for studying historical cyanobacterial blooms in sedimentary records. This opens promising grounds for various applications, including ecosystem-health assessment and environmental change monitoring.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1007/s10933-024-00350-y.</p>","PeriodicalId":16658,"journal":{"name":"Journal of Paleolimnology","volume":"73 1","pages":"73-87"},"PeriodicalIF":1.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11742344/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143007080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Holocene environmental change in Rotsee and its impact on sedimentary carbon storage. 罗舍全新世环境变化及其对沉积碳储量的影响
IF 1.7 3区 地球科学
Journal of Paleolimnology Pub Date : 2025-01-01 Epub Date: 2025-06-11 DOI: 10.1007/s10933-025-00361-3
Cindy De Jonge, Nathalie Dubois, S Nemiah Ladd, Longhui Deng, Niroshan Gajendra, Negar Haghipour, Carsten J Schubert, Mark Lever
{"title":"Holocene environmental change in Rotsee and its impact on sedimentary carbon storage.","authors":"Cindy De Jonge, Nathalie Dubois, S Nemiah Ladd, Longhui Deng, Niroshan Gajendra, Negar Haghipour, Carsten J Schubert, Mark Lever","doi":"10.1007/s10933-025-00361-3","DOIUrl":"10.1007/s10933-025-00361-3","url":null,"abstract":"<p><p>To assess the long-term impact of climate change and human influence on lakes and their sedimentary carbon storage, paleo-environmental approaches using well-dated lake sediment cores can be employed. Here, we reconstruct carbon mass accumulation rates for organic and inorganic carbon since 13 ka BP in Rotsee, a perialpine lake near the Swiss Alps, using a 12-m sediment core. A multiproxy approach (XRF, carbon and nitrogen isotopes, organic macromolecule chemical compositions, aDNA) was used to explore changes in the lake system that affect sedimentary carbon storage. The Early Holocene (11.8-7 cal ka BP) was characterized by a mixed phytoplankton and watershed-derived provenance of organic matter, and the deposition of inorganic and organic sedimentary carbon. Warming during the Holocene Thermal Maximum (9.8-8.8 cal ka BP) increased sedimentary carbon storage. In the Mid- to Late Holocene (7-1 cal ka BP), the sedimentary record indicates an increased influx of allochthonous, vascular plant-derived organic matter, and low production or conservation of phytoplankton-derived carbon. Organic carbon storage increased, while inorganic carbon became negligible. Larger deforestation events, potentially during Neolithic times (around 4 ka BP), but especially during Roman times (2 ka BP), coincided with further increased organic carbon MARs. Recent sediments, influenced by eutrophication in the last century, show higher carbon accumulation rates compared to earlier Holocene periods. Rotsee serves as a case study of how climate warming and human land use changes have influenced lake development and sedimentary carbon6 storage, with broader implications for understanding carbon dynamics in high altitude lakes and their future carbon balance.</p>","PeriodicalId":16658,"journal":{"name":"Journal of Paleolimnology","volume":"73 4","pages":"311-327"},"PeriodicalIF":1.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12241216/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144626580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cladocerans and diatoms from an Early Pleistocene interglacial deposit at Pingorsuit, North-West Greenland 格陵兰西北部 Pingorsuit 早更新世冰期沉积物中的桡足类和硅藻
IF 2.1 3区 地球科学
Journal of Paleolimnology Pub Date : 2024-09-04 DOI: 10.1007/s10933-024-00333-z
Sanna Atti, Ole Bennike, Kaarina Weckström
{"title":"Cladocerans and diatoms from an Early Pleistocene interglacial deposit at Pingorsuit, North-West Greenland","authors":"Sanna Atti, Ole Bennike, Kaarina Weckström","doi":"10.1007/s10933-024-00333-z","DOIUrl":"https://doi.org/10.1007/s10933-024-00333-z","url":null,"abstract":"<p>At the margin of the Pingorsuit Glacier in North-West Greenland, an organic-rich deposit that has recently emerged from the retreating ice cap was discovered in 2019 at an elevation of 480 m above sea level. Here we report on cladoceran and diatom analyses of this freshwater deposit from three samples of detritus gyttja, which occurred beneath a thin cover of till and glaciofluvial deposits. The cladoceran fauna comprises many non-Greenlandic, non-Arctic taxa, in accordance with previous studies of Coleoptera, Trichoptera and vascular plants. The fossil assemblages from the Pingorsuit beds resemble other fossil assemblages from Greenland that have been assigned an Early Pleistocene age, and a similar age has been suggested for the sediments found at the margin of the Pingorsuit Glacier. The fossil cladoceran and diatom species indicate a shallow lake with oligo- and dystrophic, circumneutral to slightly acidic waters. Their assemblages are more diverse compared to Holocene assemblages from northern Greenland, further indicating warmer summers than present.</p>","PeriodicalId":16658,"journal":{"name":"Journal of Paleolimnology","volume":"6 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Diatom dynamics during the last six centuries in Lake Odensjön: a new varved sediment record from southern Sweden 奥登斯约恩湖过去六个世纪的硅藻动态:瑞典南部新的变异沉积物记录
IF 2.1 3区 地球科学
Journal of Paleolimnology Pub Date : 2024-09-02 DOI: 10.1007/s10933-024-00338-8
Ethan L. Silvester, Karl Ljung, Richard Bindler, Hanna Hertzman, Giulia Lodi, Dan Hammarlund
{"title":"Diatom dynamics during the last six centuries in Lake Odensjön: a new varved sediment record from southern Sweden","authors":"Ethan L. Silvester, Karl Ljung, Richard Bindler, Hanna Hertzman, Giulia Lodi, Dan Hammarlund","doi":"10.1007/s10933-024-00338-8","DOIUrl":"https://doi.org/10.1007/s10933-024-00338-8","url":null,"abstract":"<p>Varved lake sediments offer valuable insight into past environmental conditions with high temporal resolution and precise chronological control. A combination of diatom and geochemical analyses of the recently deposited sediments of Odensjön, a small dimictic lake in southern Sweden, shows alternating light and dark laminae composed of greater amounts of biogenic silica and organic matter, respectively. As confirmed by independent radiometric dating and Pb pollution data, and supported by scanning electron microscopy of individual laminae, these features represent ongoing deposition of biogenic varves. Corresponding diatom and geochemical data obtained from a 92-cm long freeze core provide evidence of substantial lake-ecosystem dynamics during the last six centuries, related mainly to variations in light penetration and wind shear driven by human-induced changes in catchment vegetation. The diatom assemblage of Odensjön’s varved sediments is dominated by planktonic species, primarily <i>Asterionella formosa, Fragilaria saxoplanktonica</i> and <i>Discostella lacuskarluki</i> during periods of forest cover, while increased catchment openness from the mid-1500s to the late 1800s led to increased abundance of <i>Lindavia comensis</i>. Long-term variations in climate and land use, mediated through changing length of the ice-cover season and nutrient input, respectively, probably contributed to the observed trends, as well as to variations in the appearance and visibility of the varve record across the sampled sediment sequence. Odensjön represents the southernmost varved sediment record in Fennoscandia documented to date, offering potential to study the effects of various types of external forcing on its sensitive lacustrine ecosystem since the Late Weichselian deglaciation. In the present study, we investigated the possibility of assessing the local impacts of two major, historically documented volcanic events, Laki 1783–84 and Tambora 1815, which are known to have affected European societies. Although the mildly alkaline waters of the lake are well buffered and hence relatively resilient to volcanic acid deposition, a minor response to the Laki eruption may be recorded in the diatom stratigraphy.</p>","PeriodicalId":16658,"journal":{"name":"Journal of Paleolimnology","volume":"6 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Source identification using heavy minerals for small floodplain lakes: a case study of Dongping Lake, North China 利用重矿物对小型洪泛平原湖泊进行源识别:华北东平湖案例研究
IF 2.1 3区 地球科学
Journal of Paleolimnology Pub Date : 2024-09-02 DOI: 10.1007/s10933-024-00340-0
Yingying Chen, Wenjia Li, Yanyu Ji, Bingfu Jin, Shi-Yong Yu, Shiyue Chen
{"title":"Source identification using heavy minerals for small floodplain lakes: a case study of Dongping Lake, North China","authors":"Yingying Chen, Wenjia Li, Yanyu Ji, Bingfu Jin, Shi-Yong Yu, Shiyue Chen","doi":"10.1007/s10933-024-00340-0","DOIUrl":"https://doi.org/10.1007/s10933-024-00340-0","url":null,"abstract":"<p>Heavy minerals offer significant potential in elucidating sediment provenance in a variety of depositional systems. Nevertheless, source identification through heavy minerals remains a relatively understudied aspect, particularly for small floodplain lakes. Located in the North China Plain, Dongping Lake represents an exceptional site for validating the efficacy of this methodology. In this study, we collected 31 samples from Dongping Lake and surrounding floodplains and used analyses of heavy mineral compositions to establish the spatial distribution and characteristics of source regions and modern sediments of Dongping Lake. The heavy mineral assemblages demonstrate significant variations for sediments of the Yellow River and the Dawen River. The Yellow River floodplain samples are dominated by hornblende, epidote, limonite, and actinolite, with minor garnet, sphene, clinozoisite, etc. Samples from the Dawen River are dominated by epidote, hornblende, and actinolite, with minor sphene, clinozoisite, limonite, apatite, etc. Our data show that modern sediments of Dongping Lake exhibit significant variations in heavy mineral assemblages. The mineralogical composition at most sites except for the southeastern part of Dongping Lake is similar to that of sediments in the Yellow River, but differs markedly from that in the Dawen River. This variation indicates that the Yellow River contributes significant volumes of sediment to modern sediments of Dongping Lake. The results are also confirmed by the grain-size end-member unmixing analysis in modern sediments of the lake. Specifically, materials derived from the Yellow River exhibit a widespread dispersion across the lake, whilst those originated from the Dawen River are primarily concentrated in the river mouth. In addition, proximally eroded materials from the west shore of the lake also have some extent of influence, but are mainly distributed in the western region of the lake.</p>","PeriodicalId":16658,"journal":{"name":"Journal of Paleolimnology","volume":"283 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Lake-related hazards: a review for understanding historical glacial and landslide lake outburst floods in the Argentinean Andes 与湖泊有关的灾害:了解阿根廷安第斯山脉历史上冰川和滑坡湖泊溃决洪水的综述
IF 2.1 3区 地球科学
Journal of Paleolimnology Pub Date : 2024-08-29 DOI: 10.1007/s10933-024-00336-w
Stella M. Moreiras, Mariana Correas-Gonzalez, Bruno Colavitto, Agustín Quesada, Pilar Jeanneret
{"title":"Lake-related hazards: a review for understanding historical glacial and landslide lake outburst floods in the Argentinean Andes","authors":"Stella M. Moreiras, Mariana Correas-Gonzalez, Bruno Colavitto, Agustín Quesada, Pilar Jeanneret","doi":"10.1007/s10933-024-00336-w","DOIUrl":"https://doi.org/10.1007/s10933-024-00336-w","url":null,"abstract":"<p>The global research community is concerned about the potential impact of Lake Outburst Floods (LOFs) worldwide due to glacier retreat and permafrost melting as a consequence of global climate change. These conditions have led to the formation of new potentially dangerous lakes. Extreme climatic conditions, high topography, and active tectonics highlight the vulnerability of the Andean region. Additionally, the region is exposed to increasing urbanization pressures in mountainous areas. This review presents an updated inventory of LOF events in the Argentinean Andes (31–51° S) as a complete catalog is currently lacking. The main characteristics and hydrodynamic parameters were compiled from the collected historical LOFs, while missing data were estimated in this study. These findings provide insight into the dynamics and outreach of this type of threatening phenomena in the Andean region. Possible triggering mechanisms were investigated to better understand the main causes of LOFs in the Andes. This understanding is crucial for the development of effective prevention and mitigation measures against regional lake-related hazards.</p>","PeriodicalId":16658,"journal":{"name":"Journal of Paleolimnology","volume":"8 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Holocene ecosystem and temperature development inferred from invertebrate remains in Zminje Jezero (Dinaric Alps, Montenegro) 从 Zminje Jezero(黑山迪纳拉阿尔卑斯山)的无脊椎动物遗骸推断全新世生态系统和气温的发展
IF 2.1 3区 地球科学
Journal of Paleolimnology Pub Date : 2024-08-06 DOI: 10.1007/s10933-024-00334-y
Noé R. M. M. Schmidhauser, Walter Finsinger, Eleonora Cagliero, Oliver Heiri
{"title":"Holocene ecosystem and temperature development inferred from invertebrate remains in Zminje Jezero (Dinaric Alps, Montenegro)","authors":"Noé R. M. M. Schmidhauser, Walter Finsinger, Eleonora Cagliero, Oliver Heiri","doi":"10.1007/s10933-024-00334-y","DOIUrl":"https://doi.org/10.1007/s10933-024-00334-y","url":null,"abstract":"<p>Lake Zminje Jezero (1535 m a.s.l.) in Montenegro was studied for chironomid and other aquatic invertebrate remains in a sediment sequence dating back to 12,000 calibrated <sup>14</sup>C years before present (cal yr BP), providing, to our knowledge, the first lake-sediment record studied for chironomids and other associated chitinous aquatic invertebrate remains in the Dinaric Alps. Changes in chironomid and other invertebrate remains along the record make it possible to constrain changes of relevant environmental variables for aquatic invertebrates in the lake including temperature, oxygen availability, trophic status and water depth. The results suggest moderate changes in trophic conditions with chironomid assemblages indicating meso- to eutrophic conditions during the analysed interval. Invertebrate assemblages were typical for lakes with relatively high oxygen availability with a minor trend during the middle to late Holocene to conditions observed in lakes that are more hypoxic. A change in temperature is suggested in the earlier part of the record when the share of chironomid taxa adapted to warmer conditions increased, at the Younger Dryas to Holocene transition, whereas later no particularly pronounced shifts in temperature-sensitive taxa were observed. July air temperatures were estimated based on chironomid assemblages using a transfer function based on calibration data consisting of 117 lakes sampled in the Swiss Alps and northern Switzerland. The results suggest that temperatures rapidly increased by 5 °C at the onset of the Holocene (11,500 cal yr BP) leading to a relatively warm early to mid-Holocene and thereafter slightly decreased during the late Holocene. Reconstructed temperatures are discussed together with a previously published pollen record for our study site and are broadly consistent with other chironomid-based temperature reconstructions from Central, Eastern and Southern Europe. From ca. 3000 cal yr BP sedimentation rates increased and from ca. 500 cal yr BP onwards pollen data suggest that the vegetation and lake catchment were affected by human activities, possibly influencing chironomid and other invertebrate assemblages in the lake and thereby also reconstructed temperatures. Overall, our results show that combining analyses of chironomid and other invertebrate assemblages can provide valuable insights into long-term environmental changes and can provide temperature reconstructions for small mountain lakes in the Balkans, such as Zminje Jezero.</p>","PeriodicalId":16658,"journal":{"name":"Journal of Paleolimnology","volume":"44 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141936640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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