Palaeogeography, Palaeoclimatology, Palaeoecology最新文献

{"title":"Evidence for endothermy from tooth enamel(oid) oxygen isotopes in marine predators of the Late Cretaceous Western Interior Seaway, USA","authors":"Chelsea M. Comans ,&nbsp;Thomas S. Tobin ,&nbsp;Rebecca L. Totten","doi":"10.1016/j.palaeo.2026.113578","DOIUrl":"10.1016/j.palaeo.2026.113578","url":null,"abstract":"<div><div>We analyze stable oxygen isotopes (δ¹⁸O_p) of tooth enamel(oid) from fossil marine predators from the Smoky Hill Chalk Member of the Niobrara Formation (Kansas, USA) to investigate the thermoregulatory modes of shark, bony fish, and mosasaur taxa that lived in the Western Interior Seaway (WIS) of North America during the Late Cretaceous. Through comparing these taxa with the co-occurring ectothermic bony fish †<em>Enchodus</em>, which serves as a proxy for ambient conditions, we assess the relative δ¹⁸O_p values of 21 individual organisms across nine genera, using data measured from 47 fossil teeth. The mosasaur taxa (†<em>Platecarpus</em> and †<em>Tylosaurus</em>) exhibit significantly lower δ¹⁸O_p values than †<em>Enchodus</em> that are consistent in the direction and magnitude expected for endothermy in this group. Most shark taxa, by contrast, are likely ectothermic because their δ¹⁸O_p values overlap with those of †<em>Enchodus</em>. The durophagous shark †<em>Ptychodus</em> and large predatory bony fish †<em>Xiphactinus</em>, however, record significantly lower δ¹⁸O_p values than <em>Enchodus</em> and other sharks, which we interpret as indicative of elevated body temperatures consistent with endothermy and migration. Comparison with the Gulf Coastal Plain (GCP) of North America reveals that †<em>Ptychodus,</em> †<em>Cretoxyrhina,</em> †<em>Platecarpus,</em> and †<em>Tylosaurus</em> have similarly low δ¹⁸O_p values across both regions. The consistency of δ¹⁸O_p value offsets for †<em>Ptychodus</em> across species and regions suggests that endothermy was a trait inherent to this genus. Differences in δ¹⁸O_p value offsets (from local †<em>Enchodus</em> values) between WIS and GCP for †<em>Tylosaurus</em> and †<em>Cretoxyrhina</em> may reflect differences in respective study sample size, methodology, and ecological factors, namely migration, and regional ecological differences and ontogenetic habitat partitioning within †<em>Cretoxyrhina</em>. Further, these new data support previous findings that †<em>Cretalamna</em> was ectothermic and †<em>Cretoxyrhina</em> was endothermic. The prevalence of endothermy in Late Cretaceous sharks is likely higher than previously thought, challenging hypotheses of endothermy evolution in Late Cretaceous sharks.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"687 ","pages":"Article 113578"},"PeriodicalIF":2.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146026204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Asynchronous Holocene moisture and precipitation variability in the Tibetan Plateau monsoon-westerlies transition zone","authors":"Tianlong Yan ,&nbsp;Xiaomin Gao ,&nbsp;Ge Shi ,&nbsp;Chun Wang ,&nbsp;Junjiang Dong ,&nbsp;Qi Zhang ,&nbsp;Xiaoru Zhang ,&nbsp;Xiaoshuang Sun ,&nbsp;Jinliang Liu ,&nbsp;Can Zhang ,&nbsp;Cheng Zhao","doi":"10.1016/j.palaeo.2026.113583","DOIUrl":"10.1016/j.palaeo.2026.113583","url":null,"abstract":"<div><div>The monsoon-westerlies transition zone on the Tibetan Plateau (TP) is a sensitive climatic and ecological area influenced by both the Indian Summer Monsoon (ISM) and the mid-latitude westerlies. The driving mechanism of Holocene hydroclimatic change in this region remains debated. Here, we present a hydroclimatic reconstruction from the Hongyuan Peat based on multiple proxies, including the proportion of aquatic macrophytes (<em>P</em>_aq) from <em>n</em>-alkanes, the Methane Index (MI), Rb/Sr ratios, and organic matter content. The results show that moisture changes in the Holocene exhibited a tripartite “wet-dry-wet” pattern: (1) the early Holocene (12–7 ka BP) was the wettest stage, with high water tables mainly maintained by the strong ISM; (2) the middle Holocene (7–4.5 ka BP) experienced drying, reflecting reduced effective moisture; and (3) the late Holocene (after 4.5 ka BP) rewetted. However, there is a significant difference between this three-stage moisture evolution pattern and the trend of continuous reduction in regional precipitation. We interpret this pattern as the combined result of moisture distribution linked to the anti-phased influences of summer monsoon and winter westerlies, together with vegetation-evaporation feedbacks that modulate water storage and loss in peatland environments. These findings highlight the importance of circulation interactions and vegetation changes in shaping the Holocene hydroclimate pattern in the TP transition zone.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"687 ","pages":"Article 113583"},"PeriodicalIF":2.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146026262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Insights into the mechanisms behind Late Holocene climate variability in the northern tropics of South America based on modern climatic analyses","authors":"Maria I. Velez ,&nbsp;Juan Mauricio Bedoya-Soto ,&nbsp;German Poveda","doi":"10.1016/j.palaeo.2026.113586","DOIUrl":"10.1016/j.palaeo.2026.113586","url":null,"abstract":"<div><div>At the onset of the Meghalayan Age, 4200 years ago, Earth's global climate underwent significant changes as the Southern Hemisphere received more insolation. This led to changes in global atmospheric and oceanic circulation patterns resulting in reductions in precipitation and drought in some regions of the globe while creating wetter conditions in others. Although the start of the Meghalayan in tropical latitudes remain little discussed, two recent paleoenvironmental reconstructions from high-altitude sites in the Colombian Andes provide new insights on climate variability from the beginning of the Meghalayan until about 1300 years Before Present (yr BP). These records, along with comparisons to other Colombian paleo-archives, reveal a climatic divergence: between 4150 and 2500 yr BP, the Eastern Cordillera turned wet, and between 3700 and 1300 yr BP the Western Cordillera became dry. This contrasting pattern is opposite to modern conditions where the Eastern Cordillera is overall drier than the Western Cordillera. We explore potential drivers of this divergence focusing on the period between 4200 and 1300 yr BP, using modern precipitation data from rain gauges close to the paleo-sites, and regional rainfall estimates from the Climate Hazards Group InfraRed Precipitation (CHIRPS) dataset. Our approach included wavelet analyses, identification of moisture sources, and correlation analyses involving sea surface temperatures and various climatic indices. The results suggest that a simultaneous warming of the Tropical Pacific (TP) and the Tropical North Atlantic (TNA) would explain the increase in precipitation in the Eastern Cordillera and decrease in precipitation in the Western Cordillera, likely by an increase in the frequency and/or intensity of El Niño Southern Oscillation and/or Interdecadal Pacific Oscillation-like events.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"687 ","pages":"Article 113586"},"PeriodicalIF":2.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quaternary history of aridification in the Hobq Desert of northern China, and its driving mechanisms","authors":"Maotang Cai ,&nbsp;Xingchen Yang ,&nbsp;Zhigao Zhang ,&nbsp;Xinling Li ,&nbsp;Qiuyu Zhou ,&nbsp;Yuanjian Zhou","doi":"10.1016/j.palaeo.2026.113592","DOIUrl":"10.1016/j.palaeo.2026.113592","url":null,"abstract":"<div><div>The Hobq Desert of northern China is a major proximal sediment source for the Chinese Loess Plateau, and the sedimentary successions of this region are key for understanding the history of aridification in inland Asia. Here, we present a paleomagnetic chronology for the 402-m-thick DK Core drilled in the Hobq Desert. Using this chronology, we reconstruct the Quaternary history of aridification based on grain-size and environmental magnetic proxy data. Our results demonstrate that a desert environment has existed in this region since at least ∼2.5 Ma. A major intensification of aridity occurred at ∼1.1 Ma, coinciding with widespread mid-Pleistocene drying across Asia. Spectral analysis of aeolian sand components reveals a shift in orbital periodicities from dominant ∼40-ka cycles prior to ∼1.1 Ma to predominant ∼100-ka cycles thereafter. This shift aligns with the Mid-Pleistocene Transition, implicating global ice-volume forcing and phased uplift of the Tibetan Plateau as drivers of this climatic change. A shift to wetter conditions after ∼0.38 Ma was likely driven by an intensified and northward-migrating Asian Summer Monsoon, combined with regional tectonic activity. We conclude that the long-term evolution of the Hobq Desert was controlled by the combined effects of global orbital-scale climate forcing and regional tectonic factors.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"687 ","pages":"Article 113592"},"PeriodicalIF":2.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reestablishment of an early life shallow marine ecosystem in the Neoproterozoic Gardnos meteorite impact crater (Norway)","authors":"Morten Smelror ,&nbsp;Deta Gasser ,&nbsp;Mathew Domeier ,&nbsp;Øyvind Hammer","doi":"10.1016/j.palaeo.2026.113607","DOIUrl":"10.1016/j.palaeo.2026.113607","url":null,"abstract":"<div><div>Trace fossils, microbially induced sedimentary structures (MISS), palynomorphs and particulate organic matter (POM) found in post-impact sediments in the Gardnos meteorite crater provide evidence of reestablishment of a Neoproterozoic ecosystem in a shallow marine, littoral environment, with sediments covered by microbial mats. Trace fossils are rare and restricted to horizontal burrows, including <em>Gordia</em>, <em>Helminthopsis</em>, <em>Yichnia</em> and poorly preserved tracks resembling <em>Archaeonassa.</em> MISS and water-escape structures are common and include characteristic features like Aristophycus. The recovered organic walled microfossils <em>Trachysphaeridium laminaritum</em> and <em>Sphaerocongregus variabilis</em> indicate a late Neoproterozoic age for the post-impact sediments. Particulate organic matter in deposits comprise dominantly dark grey to black, highly thermally altered amorphous kerogen and fragments of algal material (TAI ∼ 4, temperature ˃ 250 °C). The trace fossils and MISS are typical of Neoproterozoic shallow marine mat-ground environments which existed prior to the development of Phanerozoic mixed-ground ecosystems.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"687 ","pages":"Article 113607"},"PeriodicalIF":2.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Astronomical forcing of Late Triassic paleoclimate and paleohydrological fluctuations: insights from the Xujiahe Formation of the Sichuan Basin","authors":"Senxiuyuan Yu ,&nbsp;Fujie Jiang ,&nbsp;Yuqi Wu ,&nbsp;Lina Huo ,&nbsp;Yong Ma ,&nbsp;Benjian Zhang ,&nbsp;Gang Zhou","doi":"10.1016/j.palaeo.2026.113593","DOIUrl":"10.1016/j.palaeo.2026.113593","url":null,"abstract":"<div><div>The Late Triassic represents a pivotal transition in Earth system evolution. While marine strata preserve extensive records of Pangea breakup, Central Atlantic Magmatic Province (CAMP) emplacement, and biotic crises, interpreting global paleoenvironmental responses remains constrained by scarce terrestrial records from the eastern Tethyan margin. Here, we establish a high-resolution astronomical time scale (203.56–201.44 ± 0.57 Ma; duration: 2.12 Myr) using natural gamma-ray logging data from Well YQ1 in the Sichuan Basin. Integrated with isotopic and elemental geochemical proxies, this framework enables reconstruction of deep-time paleoclimatic and paleohydrological variations. Results reveal negative excursions in δ¹³C_V-PDB and δ¹⁸O_V-PDB, correlated with global carbon cycle perturbations triggered by CAMP. Geochemical proxies document a climatic transition towards colder and more arid conditions during the latest Triassic, accompanied by lake-level changes, salinity fluctuations, and productivity collapse. These paleoenvironmental fluctuations exhibit coherent phase relationships with 405-kyr and a potential ∼1.2-Myr astronomical cycle, identifying orbital forcing as a primary driver. Moreover, the superimposed of these orbital cycles amplified the CAMP-induced carbon cycle perturbation, triggering synchronous and abrupt shifts in regional paleoenvironmental and paleohydrological systems. Our findings provide insights from South China into terrestrial ecosystem responses to orbital forcing and global geological events during greenhouse climate states.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"687 ","pages":"Article 113593"},"PeriodicalIF":2.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-resolution paleoclimate record from Hainan Island reveals solar-forced hydroclimatic variability in tropical China during the late Holocene","authors":"Yao Wang ,&nbsp;Yao Gu ,&nbsp;Xianqiang Meng ,&nbsp;Zhenyu Ni ,&nbsp;Weiwei Sun ,&nbsp;Enlou Zhang","doi":"10.1016/j.palaeo.2026.113620","DOIUrl":"10.1016/j.palaeo.2026.113620","url":null,"abstract":"<div><div>The centennial-scale variability and spatial features of hydroclimatic changes in Southeast China during the late Holocene remain poorly defined due to a lack of high-resolution and well-dated records from tropical regions. This study examined a sediment core from Shuangchiling maar lake (Hainan Island, tropical China) using high-density AMS ¹⁴C dating and multiple proxies, including goethite/hematite ratios, elemental ratios, magnetic susceptibility, biogenic silica (BSi), and organic carbon/ nitrogen ratios. A sedimentary hiatus spanning ∼6.5–2.0 cal ka BP was primarily driven by peat decomposition under regional warming and drying conditions, with additional modulation from site-specific hydrogeological characteristics. The lake restoration around 2.0 cal ka BP, indicated by a sharp increase in BSi content and more endogenous organic matters, suggests higher effective moisture levels. For the Common Era, multi-proxy analysis reveals notable negative correlations between regional precipitation and total solar irradiance over centennial scales (∼300-year and ∼130-year periodicities). Importantly, this relationship reverses in subtropical regions, indicating an antiphase precipitation response. These findings imply that centennial-scale hydroclimatic variability in Southeast China is influenced by solar forcing, likely mediated through El Niño-Southern Oscillation feedbacks that generate spatially heterogeneous precipitation responses tied to Intertropical Convergence Zone shifts and typhoon activities.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"687 ","pages":"Article 113620"},"PeriodicalIF":2.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reconstructing landscape configuration, vegetation history and land-use in the coastal area of two Western Mediterranean Islands (Corsica and Cavallo Islands): Evidence for a Roman environmental tipping point","authors":"Matthieu Ghilardi ,&nbsp;Jordi Revelles ,&nbsp;Matteo Vacchi ,&nbsp;Alain Pasquet ,&nbsp;Gaël Brkojewitsch","doi":"10.1016/j.palaeo.2026.113608","DOIUrl":"10.1016/j.palaeo.2026.113608","url":null,"abstract":"<div><div>This paper reconstructs coastal landscape evolution, together with its vegetation history and land use on the Osu coastal plain (southeastern Corsica) and on Cavallo Island, two areas with well attested human presence, notably during Roman times. Ten vibrocores reaching depths of up to 4.20 m were recovered and analysed using a multi-proxy approach combining sedimentological analyses, mollusc identification, pollen and non pollen palynomorphs (NPPs) analysis. In addition, a total of 20 radiocarbon datings have enabled to obtain a chronostratigraphy for both studied areas.</div><div>Our results reveal a delta progradation of the Osu River with two main phases of shoreline advance dated from the Early Bronze Age and the Roman Empire. On Cavallo Island, which was exploited for its mineral resources (granite) during Roman times, our results bring to light for the first time the presence of a freshwater wetland in the north central part of the island dating from the Bronze Age to the Late Roman times. High eutrophication of the water body then occurred, ending only when artificial silting up happened during the second half of the 20th Century CE.</div><div>Pollen records indicate early agricultural activities on the Osu deltaic plain from the Final Neolithic/Chalcolithic onwards, with further expansion during the Early Bronze Age and the Early Iron Age. At Cavallo, there is no clear evidence of agricultural activity from the Middle Bronze Age to the Early Genoese period. At a broader, island-wide scale, Roman-period agriculture intensified pre-existing land-use systems rather than initiating them, leading in many Corsican coastal areas to a marked and irreversible opening of arboreal and <em>Erica</em> formations. These transformations were spatially heterogeneous, with more limited landscape change in the San Ciprianu area compared to other regions, and were accompanied by increasing agricultural specialization during the Roman Empire, notably between cereal-dominated systems in lowland eastern coastal plains and olive cultivation in other coastal sectors (e.g. north-west).</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"687 ","pages":"Article 113608"},"PeriodicalIF":2.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ostracod assemblages and their relationship with water depth in surface sediments of Nam Co, Tibetan Plateau","authors":"Tao Xu ,&nbsp;Yang Zhang ,&nbsp;Manping Xie ,&nbsp;Junbo Wang ,&nbsp;Huaxiu Hu ,&nbsp;Dingkuan Ge","doi":"10.1016/j.palaeo.2026.113584","DOIUrl":"10.1016/j.palaeo.2026.113584","url":null,"abstract":"<div><div>Quantitative reconstruction of lake-level changes at Nam Co is essential for the understanding long-term environmental evolution and climate dynamics of the Tibetan Plateau. Ostracod-based transfer functions for water depth serve as valuable tools for quantitative lake-level reconstructions. However, their reliability at Nam Co has been constrained by limited spatial and depth coverage, insufficient robustness testing, and weak cross-validation with independent regional proxies. To address these limitations, we integrated ostracod assemblages from multiple regions and applied comparative modeling to construct a more robust transfer function for Nam Co. This function was then used to reconstruct lake-level changes since the mid–late Holocene. Our results indicate that ostracod samples collected in different years exhibit no significant compositional differences, allowing their consolidation into a comprehensive lake-wide calibration dataset and improving model representativeness. Reconstructions generated through various statistical approaches revealed broadly consistent lake-level trends, supporting the robustness of the findings. By applying a random forest transfer function based on the integrated dataset, we quantitatively reconstructed the lake-level fluctuations at Nam Co since the mid–late Holocene. The reconstruction reveals a sequence of humid–arid phases followed by a return to humid conditions, closely aligned with other regional paleoclimatic records. These results demonstrate the strong applicability of the model to Nam Co. Further analysis suggests that these fluctuations were likely influenced by the combined effects of the Indian Summer Monsoon, glacial meltwater, and Westerly air masses.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"687 ","pages":"Article 113584"},"PeriodicalIF":2.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring the potential of Viviparus shells (Gastropoda) for palaeoclimate reconstructions: A sclerochronological stable isotope case study from Lake Trichonida, Greece","authors":"Ennie Schulze ,&nbsp;Frank Riedel ,&nbsp;Ulrich Struck","doi":"10.1016/j.palaeo.2026.113574","DOIUrl":"10.1016/j.palaeo.2026.113574","url":null,"abstract":"<div><div>Continental palaeoclimate archives in subseasonal resolution remain limited in Europe, restricting insights into short-term environmental variability. This study investigates the freshwater gastropod <em>Viviparus hellenicus</em> as a potential high-resolution climate archive, using specimens from six habitats in Lake Trichonida, Greece, a large, deep lake in a semi-arid Mediterranean setting. Stable isotope patterns across shell ontogeny reveal sinusoidal δ¹⁸O patterns indicative of annual cycles, with minimal seasonal bias and strong correlation to water temperature. These trends suggest that evaporation exerts limited isotopic influence in well-buffered, deep limnic systems despite semi-arid climatic conditions. In contrast, shells from a nearby shallow, transitional site show greater sensitivity to shifting water sources and evaporative enrichment of the lake water, underscoring the role of local hydrology in shaping isotopic signals. While the shells reliably record seasonal interannual temperature variability, observed δ¹⁸O offsets and intraspecific variability complicate absolute temperature reconstructions. These uncertainties are likely to be amplified in fossil assemblages. Overall, <em>Viviparus</em> shells are considered promising high-resolution archives of continental climate, provided that local ecological and hydrological contexts are carefully considered.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"687 ","pages":"Article 113574"},"PeriodicalIF":2.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}