Palaeogeography, Palaeoclimatology, Palaeoecology最新文献

{"title":"Discerning biotic from abiotic carbonate cementations in Holocene beachrock: mineralogical and geochemical fingerprints for biosignatures","authors":"Xi-yang Zhang ,&nbsp;Ming-zhuang Wang ,&nbsp;Qi Shi ,&nbsp;Fei Tan ,&nbsp;Guo-tao Zhang ,&nbsp;Si-qi Chen ,&nbsp;Hong-qiang Yang","doi":"10.1016/j.palaeo.2025.113454","DOIUrl":"10.1016/j.palaeo.2025.113454","url":null,"abstract":"<div><div>Beachrock cementation, mediated by physicochemical and biological processes, plays a pivotal role in the rapid lithification of coastal sediments. Distinguishing between biotic and abiotic carbonate cements is critical for quantitatively reconstructing diagenetic pathways and accurately evaluating paleoenvironmental conditions. We analyzed Holocene beachrocks from Hainan and the Xisha Islands to compare their cement types. Beachrocks from Hainan are characterized by isopachous high-Mg calcite (HMC) rinds, HMC-rich peloidal fabrics, and blocky–drusy low-Mg calcite (LMC), whereas those from the Xisha Islands are dominated by acicular aragonite. HMC rinds composed of equilong fibrous crystals represent marine phreatic cements with minimal diagenetic alteration, whereas LMC forms through meteoric vadose processes, as indicated by red cathodoluminescent rings. Acicular aragonite nucleates within organic-rich micrite envelopes, with its rapid growth governed primarily by inorganic mechanisms. Peloidal fabrics exhibit distinct fluorescence patterns, dull cathodoluminescence, and elevated Mn/Fe ratios, consistent with their interpretation as microbially mediated precipitates formed during organic matter degradation under intermittently reducing conditions. Notably, peloidal fabrics and aragonite are enriched in bioactive metals (V, Fe, Zn, Pb) relative to coral <em>Porites</em>, consistent with active microbial metabolism. Unlike HMC rinds and acicular aragonite, peloidal fabrics display high total rare earth element (REE) contents, uniform REE distributions, LREE depletion (low LREE/HREE), negative Ce anomalies, positive La anomalies, Y/Ho ratios (∼45), and REE partitioning patterns closely matching modern seawater. These distinctive geochemical signatures establish peloidal fabrics as high-fidelity, high-resolution archives of paleo-seawater chemistry, providing a robust tool for deciphering ancient marine environments.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113454"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145753755","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":"New insights into the Neogene sedimentary Formations of south-western India: Implications for provenance, palaeovegetation and depositional environment","authors":"K.V. Sarath ,&nbsp;K. Sandeep ,&nbsp;Alka Absur ,&nbsp;Namitha Ajay ,&nbsp;Poonam Verma ,&nbsp;Yogesh P. Singh ,&nbsp;A.K. Rafaz ,&nbsp;V. Nandakumar ,&nbsp;G. Indu ,&nbsp;E. Shaji","doi":"10.1016/j.palaeo.2025.113499","DOIUrl":"10.1016/j.palaeo.2025.113499","url":null,"abstract":"<div><div>The Warkalli Formation represents a key Neogene sedimentary archive along the south-western coast of India. This study examines the northern extension of the Formation exposed around Cheruvathur village, Kerala, integrating sedimentological, geochemical, and palynological data to reconstruct provenance, weathering conditions, palaeovegetation, and depositional environment. The succession is composed of arenaceous–argillaceous sediments capped by laterite and is classified into four facies associations: floodplain, active channel, lagoonal/lacustrine, and dune–beach transition facies, indicating major shifts in fluvial dynamics and changes in the coastline. Extremely high values of Chemical Index of Alteration and Fe-Al enrichment suggest intense tropical chemical weathering and derivation from nearby felsic to intermediate basement rocks, with minor mafic contributions. Pollen spectra dominated by pteridophyte spores and angiosperm pollen, along with fungal remains, indicate warm and humid climatic conditions with freshwater to coastal vegetation and episodic tidal influence. These observations collectively imply strong monsoonal forcing, short sediment transport, and fluctuating sea levels during the Mio-Pliocene. The study provides new insights into Neogene palaeoenvironmental evolution along the passive western margin of India and highlights the climatic sensitivity of tropical coastal depositional systems.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113499"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145842085","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":"The paleolandscape of Melka Kunture (Ethiopia) at the time of the earliest human peopling","authors":"Rita T. Melis ,&nbsp;Margherita Mussi","doi":"10.1016/j.palaeo.2025.113520","DOIUrl":"10.1016/j.palaeo.2025.113520","url":null,"abstract":"<div><div>The archeological site-complex of Melka Kunture, at 2000 m asl on the west side of the Main Ethiopian Rift, lies in a half-graben crossed by the upper Awash River. Sedimentation processes led to the building up of stratigraphic sequences consisting of primary volcaniclastic deposits interbedded with reworked volcaniclastics emplaced in a floodplain environment. We describe here the changing paleolandscape and the implications on hominin peopling from 2,000,000 to 600,000 years ago, using the sequence of the thoroughly investigated Gombore gully with added information from other sites of Melka Kunture. Together with archaeology and paleontology, detailed information is provided by stratigraphic sections, pollen and stable isotope analysis and by the ichnological record.</div><div>The available data show a fluvial dynamic landscape characterized by a floodplain with a meandering river, gravel lag deposits and fine-grained overbank deposits. The vegetation was of Afromontane type. A major volcano-tectonic event at 1.2 Ma blanketed the area with products which clogged the valley before the river was eventually able to resume its course. The abundant artefacts and faunal remains in the gravel deposits suggest that during the Early Pleistocene and the early Middle Pleistocene, before and after the 1.2 Ma event both <em>Homo erectus</em> with Oldowan and then Acheulean lithic productions, and later on <em>H. heidelbergensis</em> with middle Acheulean ones, repeatedly came to those well-drained spots. Single-purpose sites also exist in different environments and other ones provide evidence of hominins roaming through the plain.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113520"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145885193","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":"Multi-paleoclimatic proxies implicate climate shift from arid-to-humid in the Northeastern Arabian Sea teleconnected to ENSO events","authors":"Sruthy Rose Baby ,&nbsp;Mohan Kuppusamy ,&nbsp;Busnur R Manjunatha ,&nbsp;Jithin Jose ,&nbsp;Pankaj Kumar ,&nbsp;Saravanan Kothandaraman ,&nbsp;Ravi Mishra","doi":"10.1016/j.palaeo.2025.113463","DOIUrl":"10.1016/j.palaeo.2025.113463","url":null,"abstract":"<div><div>The Arabian Sea sediments have the records of significant temporal and spatial variations in response to the neotectonic changes, paleoclimatic and paleo-sea level fluctuations particularly from the Quaternary period. In this study area, environmental mineral magnetic parameters, diffuse reflectance spectroscopy (DRS), XRF (Fe/K, Ti/Al and Ca %) have been studied in an AMS radiocarbon dated core- SK240/473 from the coast off Saurashtra, south-western part of Gujarat State, north-western continental margin of India, to unravel paleoclimatic and paleoceanographic sedimentation and sea level changes over the past 15 ka BP. Currently, the rainfall of this region mainly occurs during the summer monsoon season. Based on results of multi-proxies measured in this core indicate that three major changes in the climate: phase- I before the Holocene thermal maximum (HTM), phase- II during the HTM, and phase- III after the HTM. The phase-I is mainly characterized by abundance of hematite over goethite with high carbonate content, but lower in total organic carbon (TOC) and chemical weathering index (CWI) suggesting arid climate of oxidizing environment of sediment deposition during the rapid sea level rise from 14.5 ka BP to 12.0 ka BP with a standstill sea level from 12 ka BP - 10 ka BP. In contrast, the phase-II marked by a transition from arid to humid condition of sediment deposition characterized by higher CWI, abundant TOC and goethite, but lower in hematite and carbonate concentrations reflecting humid climate of reducing environment of sediment deposition during the Holocene thermal maximum (HTM) from 10.00 ka BP to 5.50 ka BP. Interpretations made here are generally in good agreement with the deglacial to Holocene Sea level fluctuations curve proposed for the west coast of India. In Phase III, the χlf, χfd, and Chemical Index of Alteration (CIA) data from sediments deposited after the HTM largely suggest deposition in a humid environment, occasionally interrupted by arid episodes in the study region's hinterland. Such arid events linked to paleo-El Niño episodes recorded in the tropical eastern Pacific Ocean. This interpretation is further supported by the reason explained to the current rainfall variability in the hinterland of the study area. Overall, the data of the core studied reveal significant environmental, sea-level and monsoonal changes in the NE Arabian Sea since the deglacial period. The goethite/hematite (G/H) ratio, χlf and χfd profiles which is an indicator of humidity/aridity and coastal upwelling are different from the sea-level curve, suggesting that formers are better indicator of monsoon intensity that often regulated by the ENSO.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113463"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145799353","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":"Coupled tectonic-climatic-oceanographic dynamics drove the evolution of foraminiferal diversity in South China during the Middle to Late Mississippian","authors":"Chao Liu ,&nbsp;Junjun Qi ,&nbsp;Pedro Cózar ,&nbsp;Ismael Coronado ,&nbsp;Fei Li ,&nbsp;Weiqing Liu ,&nbsp;Meng Li ,&nbsp;Ping Wang ,&nbsp;Xin Li ,&nbsp;Xia Hu ,&nbsp;Song Jin","doi":"10.1016/j.palaeo.2025.113528","DOIUrl":"10.1016/j.palaeo.2025.113528","url":null,"abstract":"<div><div>Understanding the interactions between biological evolution and other components of the Earth system, particularly tectonic, climatic, and environmental changes, has long been a central focus in Earth sciences. In this study, we present the first high-resolution foraminiferal species diversity curve spanning the late Visean to Serpukhovian from the Youjiang Basin of South China, integrated with multiple geochemical datasets, to elucidate the factors influencing foraminiferal diversification through robust correlations among sedimentological, biological, and geochemical records at a global scale. The widespread biodiversity crisis during the early late Visean (Aleksinian–Mikhailovian transition) is interpreted to have resulted from global oceanic bottom-water anoxia, coinciding with intensified continental silicate weathering and the onset of a major phase of Gondwanan glaciation. The uplift of the Hercynian orogenic belt, exposure of mantle-derived rocks at low latitudes, and the expansion of vascular plants during this interval are considered the primary driving mechanisms. Enhanced nutrients delivery to the oceans via terrestrial input elevated primary marine productivity and accelerated organic carbon export and burial, leading to excessive consumption of dissolved oxygen and other oxidants during organic matter degradation. Global foraminiferal radiation from the early late Visean to the earliest Serpukhovian is attributed to elevated dissolved oxygen concentrations and sufficient food availability, coupled with persistent carbonate supersaturation in contemporaneous upper ocean waters. The widespread loss of shallow shelf habitats, driven by the progression of the Hercynian orogeny and enhanced continental ice accumulation on Gondwana continent during the early to latest Serpukhovian, probably contributed to the observed foraminiferal diversity decline during this period. This study sheds new light on the interactions among various Earth systems during a period characterized by profound transformations in global paleogeography, climate, and oceanographic conditions.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113528"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145842088","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":"Deciphering Holocene monsoon dynamics in northeastern India using speleothem δ18O record and petrography","authors":"Yachna Verma ,&nbsp;Anil K. Gupta ,&nbsp;Prasanta Sanyal ,&nbsp;Priyantan Gupta ,&nbsp;Som Dutt ,&nbsp;Pankaj Kumar ,&nbsp;Abhijit Mukherjee","doi":"10.1016/j.palaeo.2025.113518","DOIUrl":"10.1016/j.palaeo.2025.113518","url":null,"abstract":"<div><div>A high-resolution stalagmite δ¹⁸O record from Mawsmai Cave (MAW), spanning from ∼11,807 to 5622 calibrated years before present (cal yr BP), sheds light on the dynamics of the Indian Summer Monsoon (ISM). In the early Holocene (∼ 11,807–7700 cal yr BP) the decreased δ¹⁸O values suggest a period of intensified ISM, whereas in the middle Holocene (∼ 7700–5622 cal yr BP) the positive δ¹⁸O values demonstrate a weak ISM. Petrographic and mineralogical analyses suggest a correspondence between changes in stalagmite fabric and δ¹⁸O variability, implying a climatic control on stalagmite growth. The MAW record also depicts several multi-centennial scale ISM shifts that coincide with the Bond events 8, 7, 6, 5b, 5a, and 4, suggesting teleconnections between North Atlantic climate and ISM variability via changes in the Atlantic Meridional Overturning Circulation (AMOC). Spectral and continuous wavelet transform analyses of the MAW record reveal periodicities of ∼118 and ∼ 110 years, consistent with the centennial-scale Gleissberg solar cycles. These cyclicities indicate that solar variability in conjunction with coupled ocean–atmosphere dynamics, including the Pacific Decadal Oscillation (PDO) and the temperature gradient between the Tibetan Plateau and the Indian Ocean, played a dominant role in modulating ISM variability during the early to middle Holocene.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113518"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145842086","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":"How volcanoes affect boreal mires: Climate-driven regional vegetation changes and stage-dependent responses to tephra fallout in Kamchatka during the Late Holocene","authors":"Valerii E. Pimenov ,&nbsp;Maria M. Pevzner ,&nbsp;Natalia G. Mazei ,&nbsp;Andrey N. Tsyganov ,&nbsp;Ekaterina G. Ershova ,&nbsp;Yuri A. Mazei","doi":"10.1016/j.palaeo.2025.113501","DOIUrl":"10.1016/j.palaeo.2025.113501","url":null,"abstract":"<div><div>Studying vegetation dynamics in the regions with high volcanic activity is crucial for understanding ecosystem responses to environmental disturbances and predicting future ecological changes. However, the impacts of tephra deposition on vegetation at local and regional scales remain poorly quantified, limiting understanding of ecosystem resilience to volcanic disturbances. This study presents a high-resolution, multiproxy palaeobotanical record from the Kumroch peatland (Kamchatka, Eurasian Far East), integrating detailed tephrostratigraphy, radiocarbon ages, pollen, plant macrofossil, and loss on ignition data. The peat sequence spans the last ∼5 kyr, anchored by 28 recorded tephra layers. Birch forests (<em>Betula ermanii</em>) and alder shrublands (<em>Alnus alnobetula</em> subsp. <em>fruticosa</em>) dominated during the Middle and Late Holocene, with their proportions shifting in response to climate variations. These changes align in timing with the Late Holocene climate oscillations, primarily reflecting temperature fluctuations. Tephra fallout events had no persistent impact on regional vegetation and limited effects on the local vegetation. These findings demonstrate the resilience of boreal ecosystems to tephra deposition across volcanically active areas and underscore the importance of large-scale studies for understanding ashfall-related disturbances.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113501"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145799342","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":"Carbonate-associated sulfate isotope signatures in marine mollusk shells","authors":"Shanggui Gong ,&nbsp;Yongbo Peng ,&nbsp;Laurie C. Anderson ,&nbsp;Annette Summers Engel ,&nbsp;Huiming Bao","doi":"10.1016/j.palaeo.2025.113503","DOIUrl":"10.1016/j.palaeo.2025.113503","url":null,"abstract":"<div><div>The oxygen and sulfur isotope compositions of carbonate-associated sulfate (CAS) in biogenic materials, such as mollusk shells, are valuable for inferring paleo-seawater sulfate isotope signatures. However, infaunal species may incorporate sulfate from sediment porewater or, in chemosymbiotic taxa, sulfate metabolized by endosymbiotic sulfur-oxidizing bacteria. To evaluate whether shell CAS primarily records seawater or an ecological niche signature, we measured the δ³⁴S and δ¹⁸O of CAS from 24 modern and Holocene mollusk species spanning epifaunal, shallow infaunal, deep infaunal, and lucinid (chemosymbiotic) habitats across the northeastern Gulf of Mexico, Bahamas and Mexico. Results show substantial isotopic variability (δ³⁴S_CAS: 15.1–22.6 ‰; δ¹⁸O_CAS: 8.5–14.3 ‰): 1) Epifaunal and lucinid δ³⁴S_CAS values cluster near seawater values, while shallow infauna exhibits the greatest variability (up to 7.5 ‰ range), and deep infauna consistently show lower δ³⁴S_CAS (17.1–19.9 ‰) than seawater. 2) All taxa exhibit δ¹⁸O_CAS enrichment above seawater. The absence of ³⁴S-enrichment in infauna suggests limited porewater sulfate incorporation. Epifaunal δ³⁴S_CAS values span a 2.6 ‰ range, with a minimum of 19.5 ‰, implying contributions from non-seawater sulfate, likely dietary sulfur or intracrystalline organic sulfate. Reduced δ³⁴S_CAS in deep infauna also supports these additional sulfate sources incorporation, as deep infauna increased reliance on deposit-feeding of deeper sediment organic matter characterized by decreasing δ³⁴S value. For shallow infauna, their larger variability in δ³⁴S_CAS stems from diverse feeding strategies (filter- and deposit-feeding) and niche adaptations. Bulk CAS of shallow-water lucinid species archive limited ³⁴S-depeted signal of endosymbiont-derived sulfate. CAS oxygen isotope is consistently enriched due to vital effects, with highly variable δ¹⁸O_CAS value across all niches supporting multiple sulfate sources in shells. These findings demonstrate that mollusk shell CAS does not purely record seawater sulfate but incorporates ecological signatures, underscoring the importance of species-specific biology in CAS-based paleoenvironmental or symbiosis studies.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113503"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145799355","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":"Paleobiogeography of early to middle Paleozoic phytoplankton: A review and synthesis","authors":"Eiver Gelan Manzano ,&nbsp;Claude Monnet ,&nbsp;David M. Kroeck ,&nbsp;Stewart Molyneux ,&nbsp;Hendrik Nowak ,&nbsp;Paulina Nätscher ,&nbsp;Thomas Servais","doi":"10.1016/j.palaeo.2025.113412","DOIUrl":"10.1016/j.palaeo.2025.113412","url":null,"abstract":"<div><div>Phytoplankton form the foundation of marine food webs, and their fossil record provides key insights into ecosystem and climate evolution. We review the biogeography of Paleozoic phytoplankton based on data from the literature and new multivariate analyses of acritarch data that are georeferenced to paleolatitude and paleolongitude. Results show that acritarchs are rather cosmopolitan with wide geographic ranges, their distribution often differentiated into two broad latitudinal realms: a northern warm-water and a southern cold-water assemblage. Provincialism was most pronounced during the Ordovician and Devonian. The Ordovician provincial structure collapsed during the Hirnantian glaciation, resulting in a short-lived cosmopolitan phase that persisted into the early Silurian. Biogeographic differentiation re-emerged in the middle Silurian and was reorganized in the Devonian as plate movements closed ocean basins and enabled new intercontinental exchanges. Overall, climate change and plate tectonics appear to be the primary drivers of phytoplankton provincialism.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113412"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145799356","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":"Taiwan's land-vertebrate suite: An assemblage forged by tectonism and sea-level shifts","authors":"Jason R. Ali ,&nbsp;Uwe Fritz","doi":"10.1016/j.palaeo.2025.113502","DOIUrl":"10.1016/j.palaeo.2025.113502","url":null,"abstract":"<div><div>Like many islands in continental-shelf settings, Taiwan has a rich land-vertebrate suite comprising mainly nonendemic taxa. Unusually, though, it also hosts a substantial fraction of endemic species, some the result of in situ diversification. Here, we disentangle the physical processes that have shaped the island's assemblage and document the roles they played. Taiwan is a high-elevation landmass on the edge of China's continental shelf, its emergence resulting from the ongoing collision between the Eurasian and Philippine Sea Plates, which started <em>c</em>. 5 Mya. For the first <em>c</em>. 4 Myr of the island's history colonizations involved over-water dispersal, hence relatively few establishment events. Significantly, the sizeable ecospace the incomers entered hosted a variety of niches (notably, greater than those in the areas they crossed from), and this spurred anagenesis and occasionally cladogenesis. Although the Pleistocene sea-level falls (starting <em>c</em>. 2.6 Mya) modified greatly and frequently the regional geography, only those occurring after 900 kya were sufficiently large (i.e., below −72/−75 m) to open up a succession of landbridges across the Taiwan Strait seabed to mainland Asia. Significantly, such episodes allowed taxa to enter Taiwan unimpeded, thereby accounting for the bulk of its lineages, most of which are nonendemic.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113502"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145885191","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}