Article
Geosciences, Multidisciplinary
M. G. Wearing, L. A. Stevens, P. Dutrieux, J. Kingslake
Summary: Ice-shelf basal channels are formed by concentrated submarine melting, affecting ice-shelf structural integrity. This study examines the viscous ice response to secondary flows induced by gradients in ice thickness, finding that secondary flow can stabilize basal channels in thick ice shelves. Additional research is needed to assess the impact of secondary flow on inferring basal-channel melt rates from satellite observations.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
C. A. Sidor, J. A. Mcintosh, B. M. Gee, W. R. Hammer, P. J. Makovicky, N. D. Smith, R. M. H. Smith, N. J. Tabor, M. R. Whitney, C. H. Woolley
Summary: The Permian-Triassic rocks in the Transantarctic Basin offer a valuable record of high latitude paleoenvironments and terrestrial vertebrate faunas. This study summarizes the taxonomic and paleoecological implications of collected vertebrate fossils and presents new geological observations. The results reveal the similarities and differences between the Fremouw Formation and the Karoo Basin, as well as provide insights into the depositional environments and diagenetic alterations of these formations.
EARTH-SCIENCE REVIEWS
(2023)
Article
Chemistry, Analytical
Shanshan Wang, Jinpei Yan, Qi Lin, Miming Zhang, Suqing Xu, Shuhui Zhao, Meina Ruan
Summary: The study found that water-soluble ions in aerosols in the Southern Ocean in summer play a role in the formation of marine secondary aerosols and could potentially impact global climate change. However, there is still insufficient research on the background concentrations and formation mechanisms of marine secondary aerosols in polar regions.
ENVIRONMENTAL CHEMISTRY
(2021)
Article
Environmental Sciences
Bradley R. Moore, Steven J. Parker, Peter M. Marriott, Colin Sutton, Matthew H. Pinkerton
Summary: This paper examines the species- and sex-specific life histories of Macrourus caml and M. whitsoni in the Ross Sea region, Antarctica, and identifies important characteristics such as lifespan, growth rate, and gender differences in these species. The findings of this study are significant for understanding the response of these species to exploitation, informing future risk assessments and fisheries management.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Multidisciplinary Sciences
Jiyuan You, Yiqun Liu, Dingwu Zhou, Yiyao Yang
Summary: The study presents the original discovery of well-preserved hydrothermal chimneys in the geological record and provides evidence of hydrothermal activity in sedimentary rocks. The ancient chimneys may be related to oil production and serve as important indicators for future oil investigations. Their in situ geochemistry and sulfur isotopes suggest a possible magmatic trigger for these hydrothermal vents.
SCIENTIFIC REPORTS
(2021)
Article
Anatomy & Morphology
Kelsey M. Jenkins, Dalton L. Meyer, Patrick J. Lewis, Jonah N. Choiniere, Bhart-Anjan S. Bhullar
Summary: This study describes a fossil specimen of the diapsid Palacrodon from the Early Triassic in Antarctica, which has important implications for understanding the radiation and ecosystem recovery in the early Mesozoic. The research reveals that Palacrodon is outside of crown reptiles but closer to crown reptiles than late Permian diapsids, and it exhibits anatomical features related to the evolution of the stapes and incipient adaptations for arboreality and herbivory.
JOURNAL OF ANATOMY
(2022)
Article
Plant Sciences
Chunxiao Sun, Xiaoyu Liu, Ning Sun, Xiaomin Zhang, Mudassir Shah, Guojian Zhang, Qian Che, Tianjiao Zhu, Jing Li, Dehai Li
Summary: Four new compounds were isolated from a fungus derived from an Antarctica sponge, and compound 4 showed selective inhibition against PDAC cells, suppressing cell proliferation and inducing apoptosis. It also blocked cell migration and invasion and improved the therapeutic effect of the chemotherapy drug gemcitabine. Mechanism studies revealed that compound 4 can inhibit the expression of EGFR and XIAP in PDAC cells.
JOURNAL OF NATURAL PRODUCTS
(2022)
Article
Geography, Physical
Gianluca Cornamusini, Luca Zurli, Giovanni P. Liberato, Valentina Corti, Erik L. Gulbranson, Matteo Perotti, Sonia Sandroni
Summary: This study provides a lithostratigraphic reappraisal of the Beacon Supergroup at Allan Hills in Antarctica, revealing changes in fluvial style and the record of the end-Permian extinction event. The results are similar to studies in Eastern Australia and provide important information for understanding global changes.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Multidisciplinary Sciences
David I. Whiteside, Sofia A. V. Chambi-Trowell, Michael J. Benton
Summary: Understanding the evolution of mammals, birds, and squamates is crucial for biodiversity science. This study presents the fossil of a modern-type lizard from the Late Triassic, revealing an older origin of squamates and substantial diversification following a specific climatic episode.
Review
Geosciences, Multidisciplinary
Michael J. Benton, Feixiang Wu
Summary: The Triassic period witnessed significant changes in marine and terrestrial ecosystems. The recovery from the Permian-Triassic mass extinction was followed by a period of renewal and novelty, which was enhanced by the effects of the Carnian Pluvial Episode. The oceans experienced changes in the carbonate factory and the Mesozoic Marine Revolution during the Middle and Late Triassic, contradicting the previous belief that these occurred in the Late Jurassic and Cretaceous. On land, there was a competition between synapsids and archosauromorphs, leading to a shift in posture and physiology, including the development of warm-bloodedness. This shift in ecosystems and adaptations was triggered by the mass extinction event and further accelerated by the Carnian Pluvial Episode.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Environmental Sciences
Youngju Lee, Jinyoung Jung, Tae Wan Kim, Eun Jin Yang, Jisoo Park
Summary: In the Amundsen Sea, global warming has accelerated ice melt and affected various ocean properties. A study on phytoplankton growth found that light limitation plays a role in determining phytoplankton abundance and biomass. Different responses to light and sinking rates of each species were found to control the distribution of phytoplankton in the surface layer.
ENVIRONMENTAL RESEARCH
(2022)
Article
Plant Sciences
Jorge Gago, Miquel Nadal, Maria Jose Clemente-Moreno, Carlos Maria Figueroa, David Barbosa Medeiros, Neus Cubo-Ribas, Lohengrin Alexis Cavieres, Javier Gulias, Alisdair Robert Fernie, Jaume Flexas, Leon Aloys Bravo
Summary: Deschampsia antarctica is a native vascular plant in Antarctica, and the availability of nutrients in the soil affects its photosynthetic and stress tolerance mechanisms. Plants growing on low-nutrient availability soils have more limiting photosynthetic and stress tolerance performances, while plants in nutrient-rich soils show vigorous growth without appreciable levels of stress.
JOURNAL OF EXPERIMENTAL BOTANY
(2023)
Article
Chemistry, Applied
Gyeongseok Gwak, Jin-hyeok Park, Donghun Kim
Summary: In this study, the secondary growth of zeolite MFI nanosheet fragments was investigated using diammonium-cation structure-directing agents (SDAs) to expand our knowledge on the self-regulated growth of zeolite MFI crystals. The results showed that nanosheet-fragment seeds yield zeolite MFI nanosheets with improved uniformity in thickness and shape, and two distinct nanosheet morphologies can be acquired depending on the synthesis temperature. The growth of zeolite MFI nanosheets using the diammonium-cation SDAs provides valuable insights on zeolite crystal growths and promotes advanced synthesis techniques for the morphology control of zeolites and other molecular sieve materials.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Biology
Fabiana Canini, Jozsef Geml, Pietro Buzzini, Benedetta Turchetti, Silvano Onofri, Luigi Paolo D'Acqui, Caterina Ripa, Laura Zucconi
Summary: Antarctic soil fungal communities are highly adapted to the extreme environment of the region, with abiotic conditions playing a key role in determining their structure. The communities show low resilience to environmental changes, which raises concerns in the face of global warming. Both abiotic parameters and species adaptation are crucial factors that influence the diversity and composition of these communities.
Article
Multidisciplinary Sciences
Michael P. Meredith
Summary: Dense water production in the seas around Antarctica plays a crucial role in carbon storage and slowing global warming. However, a new model suggests that the efficiency of this carbon storage may be greatly reduced by system changes by the end of this century.
NATURE COMMUNICATIONS
(2022)
Article
Paleontology
Anne-Laure Decombeix, Thibault Durieux, Carla J. Harper, Rudolph Serbet, Edith L. Taylor
Summary: The discovery of glossopterid rootlets growing in the late Permian tree trunk suggests facilitative interactions among glossopterid trees, aiding their expansion in high-palaeolatitude environments. The existence of self-facilitation may have contributed to the growth of glossopterids in various environments.
Article
Multidisciplinary Sciences
Antoine Champreux, Brigitte Meyer-Berthaud, Anne-Laure Decombeix
Review
Plant Sciences
Anne-Laure Decombeix, Jean Galtier
Summary: The study investigated the presence of periderm in the Carboniferous plant Cladoxylon taeniatum, finding a well-developed periderm closely related to secondary vascular growth, increasing the diversity of anatomical strategies for growth in this plant group.
INTERNATIONAL JOURNAL OF PLANT SCIENCES
(2021)
Article
Plant Sciences
Brigitte Meyer-Berthaud, Anne-Laure Decombeix, Romain Blanchard
Summary: This study explores the origins of Isoetales plants in the late Paleozoic by analyzing anatomically preserved lycopsid specimens from Barraba, New South Wales. The new findings reveal a unique combination of features in a new arborescent taxon, increasing the diversity of early Isoetales around the Devonian-Carboniferous boundary. The flora in Barraba is more similar to that in southern Laurussia than in China.
INTERNATIONAL JOURNAL OF PLANT SCIENCES
(2021)
Biographical-Item
Plant Sciences
Patricia E. Ryberg, Carla J. Harper, Anne-Laure Decombeix
INTERNATIONAL JOURNAL OF PLANT SCIENCES
(2021)
Article
Paleontology
Ronny Roessler, Anne-Laure Decombeix, Jean Galtier, Rodrigo Neregato, Sandra Niemirowska, Robert Noll
Summary: A study reported the discovery of an early Sphenophyllum plant with anatomically preserved structures in fossils from the Parnaiba Basin in Brazil. The plants are interwoven with other vegetation, show different developmental stages, and were found in the stems of trees. The basic anatomical structures of these plants support their close relationship to the globally distributed Sphenophyllum thonii.
PALAEONTOGRAPHICA ABTEILUNG B-PALAEOPHYTOLOGIE PALAEOBOTANY-PALAEOPHYTOLOGY
(2021)
Article
Plant Sciences
Anne-Laure Decombeix, Ignacio H. Escapa, Dario De Franceschi, Olivier Bethoux
Summary: Reflectance Transforming Imaging (RTI) enables flexible manipulation of lighting angles for investigating minute details of the 3D structure of sub-planar objects. In this study, RTI is applied to the type specimen of Gingkophyllum grassetii, clarifying its morphology and underscoring the importance of reexamining Paleozoic ginkgophyte type specimens.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2021)
Article
Plant Sciences
Brigitte Meyer-Berthaud, Anne-Laure Decombeix, Catherine Girard, Philippe Steemans, Romain Blanchard, Antoine Champreux, Mathilde Evreinoff
Summary: This paper presents a study on the Late Devonian plant macro- and micro-remains found in the Mandowa Mudstone at Barraba, NSW, Australia. The diverse plant assemblage includes both common and unique taxa, with some specific to Barraba. The closest floral resemblance is found in the New Albany Shale in eastern USA, indicating possible floral connection between Northern Gondwana and Southern Laurussia.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2021)
Editorial Material
Plant Sciences
Anne-Laure Decombeix, Brigitte Meyer-Berthaud
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2022)
Review
Plant Sciences
Anne-Laure Decombeix, Carla J. Harper, Jean Galtiera, Brigitte Meyer-Berthaud, Michael Krings
Summary: Tyloses are protoplasmic swellings that form in conducting cells in response to heartwood formation, embolism, or pathogen infection. The discovery of tyloses in permineralized wood from the Tournaisian of Australia provides the oldest fossil evidence of tylosis formation. Different stages of tylosis development were observed, ranging from small bubble-like protrusions to dense tyloses filling the lumen of conducting cells. Further research aims to explore even older fossils for evidence of tyloses and understand their roles in plant-pathogen interactions and plant hydraulic properties.
Article
Paleontology
Aixa Tosal, Anne-Laure Decombeix, Brigitte Meyer-Berthaud, Jean Galtier, Carles Martin-Closas
Summary: The first anatomically preserved wood specimens of an upland Carboniferous flora from the Iberian Peninsula are reported. The study describes two taxa, a calamitacean Equisetales (Arthropitys sp.) and a Cordaitales (Dadoxylon sp.). The well-preserved fossil wood provides significant paleoenvironmental information, indicating slightly seasonal climate in the intramontane basins of the Pyrenees towards the end of the Carboniferous.
PAPERS IN PALAEONTOLOGY
(2023)
Article
Paleontology
Agathe Toumoulin, Anne-Laure Decombeix, Carla J. Harper, Rudolph Serbet
Summary: This article describes new silicified woods of Early Jurassic age from Carapace Nunatak, South Victoria Land, formally recognizing the genera Agathoxylon and Brachyoxylon for the first time in the Jurassic of Antarctica. The imperfect preservation of the woods is attributed to the presence of fungi, whose anatomical structures are described in detail. These new specimens, along with previous reports of pollen, leaves, and cones, support the existence of several conifer families in the Early Jurassic floras of the region.
Article
Plant Sciences
Anne-Laure Decombeix, Carla J. Harper, Cyrille Prestianni, Thibault Durieux, Merlin Ramel, Michael Krings
Summary: Tyloses, which are the swellings of parenchyma cells into adjacent water-conducting cells, have been discovered in Late Devonian (approximately 360 Myr ago) Callixylon wood. This finding suggests that some of the earliest woody trees were capable of protecting their vascular system by occluding individual conducting cells in response to embolism and pathogen infection.
Article
Paleontology
Bertrand Laloux, Anne-Laure Decombeix
Summary: The fossil record of arborescent lignophytes indicates an increasing anatomical diversity during the Tournaisian, possibly due to the extinction of Archaeopteris. New silicified wood remains found in northeastern Queensland, Australia, show taxonomic affinities to Pitus and Eristophyton and have implications for future studies on Early Carboniferous arborescent lignophytes. The convergence of Eastern Gondwanan and Laurussian floras in wood anatomy and growth rings suggests a possible monsoonal circulation during the Early Carboniferous.
COMPTES RENDUS PALEVOL
(2022)
Article
Paleontology
Candela Blanco-Moren, Anne-Laure Decombeix, Cyrille Prestianni
Summary: The study revised and analyzed the stem morphology of Weichselia reticulata, revealing its unique anatomy and adaptations to stressful environments. Additionally, structures interpreted as aerophores or nectaries were found, providing new insights into the systematic affinities of Weichselia.
PAPERS IN PALAEONTOLOGY
(2021)
Article
Plant Sciences
Gar W. Rothwell, Ruth A. Stockey
Summary: This study utilizes anatomical analysis of fossils from Vancouver Island, Canada, to support the development of a whole plant concept for the Eocene species of Gleichenia and provide data for the first organismal concept of an extinct species of Gleichenia from the Cenozoic fossil record. The findings suggest that the characteristics of the Gleicheniaceae family were present during the Cretaceous and Paleogene periods, with modern species well-established and diversifying.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Kathrin Ganz, Cesar Morales-Molino, Erika Gobet, Dmytro Kiosak, Nadezhda Kotova, Jacqueline van Leeuwen, Sergey Makhortykh, Christoph Schworer, Willy Tinner
Summary: This study presents a palaeoecological reinvestigation from the Kardashynskyi mire in southern Ukraine, reconstructing the vegetation dynamics, fire history, and land use for the past 8300 years. The results show that both climate and human activities have driven the vegetation changes, and the remaining special vegetation types are severely threatened under current conditions.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Willem O. van der Knaap, Bas van Geel, Jacqueline F. N. van Leeuwen, Frans Roescher, Dick Mol
Summary: Pollen analysis of fossilized teeth from a giant deer found in The Netherlands provides insights into the diet, landscape, and climate of the specimen. The study suggests that the giant deer most likely lived during the early Eemian or an early Weichselian interstadial.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Yun Guo, Yu Zhou, Josef Psenicka, Jiri Bek, Jana Votockova Frojdova, Zhuo Feng
Summary: A new species of adpressed leptosporangiate fern, Szea yunnanensis sp. nov., is described from Yunnan Province, Southwest China. The fronds of this new species have unique characteristics such as fertile pinnules with triangular to falcate shape and abaxial sori arranged in one row on each side of the midvein.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Adele C. M. Julier, Glynis J. Humphrey, Caitlin Dixon, Lindsey Gillson
Summary: The relationships between woody vegetation cover and fire, climate, herbivory, and human activities in African savanna ecosystems are complex. Fire suppression policies implemented in a national park in northeast Namibia from 1888 to 2005 did not lead to noticeable decreases in fire or enhanced tree recruitment, suggesting that fire occurrence in savanna ecosystems is more closely linked to climate than management. Fire management should adapt to rainfall variability and integrate customs of early dry season burning.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Milan Libertin, Jiri Kvacek, Jiri Bek
Summary: This paper revises the genus Aberlemnia from the Early Devonian of Scotland based on its type-material A. caledonica and describes a new species, Aberlemnia krizii sp. nov, from the Silurian of Czechia. The study provides detailed diagnoses and highlights the differences between the two species. Aberlemnia is positioned on an evolutionary clade line leading to the Lycophytina.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)