Article
Biology
Heather Birch, Daniela N. Schmidt, Helen K. Coxall, Dick Kroon, Andy Ridgwell
Summary: The study reveals that the impact at the Cretaceous/Palaeogene (K/Pg) boundary fundamentally disrupted the ocean's biological pump and plankton size and diversity. Surprisingly, the recovery of ecological traits occurred much later than the recovery of the biological pump.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2021)
Article
Environmental Sciences
Jacquelyn N. Cresswell, Peter J. van Hengstum
Summary: This study found that benthic habitat partitioning in the oxygenated marine sectors of Karst subterranean estuaries is strongly influenced by the source and quantity of particulate organic matter delivered to the benthos. Analysis of benthic foraminifera data from several large flooded cave systems in Bermuda revealed spatial variability in benthic communities based on the organic matter sources and isotopic values.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2021)
Article
Oceanography
Sudhira R. Bhadra, Rajeev Saraswat
Summary: The study examines the surface distribution and ecological preferences of planktic foraminifera from 99 core top samples in the riverine influx dominated western Bay of Bengal. The findings suggest that freshwater and sediment influx strongly modulate the distribution of planktic foraminifera in the region, with implications for reconstructing past environmental conditions in the Bay of Bengal.
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
(2021)
Article
Environmental Sciences
Catherine V. Davis
Summary: A stable isotope record from foraminifera in the Panama Basin suggests that the oxygen minimum zone in the Eastern Equatorial Pacific became shallower during the last deglaciation, leading to the transfer of carbon from the ocean to the atmosphere. The study also finds evidence for an expansion of the oxygen minimum zone during the deglaciation and a restructuring of oxygen and carbon dynamics in the water column.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Engineering, Multidisciplinary
Xin Shi, Tong Guo, Lianglong Song, Jun Yang
Summary: This paper presents experimental and numerical investigations of a novel self-centering hollow-core fiber-reinforced polymer concrete-steel bridge column. The proposed structure combines the advantages of accelerated bridge construction and self-centering. The results show that the column has adequate self-centering and energy dissipation capacities, but further refinement of the seismic resistance is needed by selecting the configuration and material properties of the aluminum bar as energy dissipators.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Limnology
Joost Samir Mansour, Andreas Norlin, Natalia Llopis Monferrer, Stephane L'Helguen, Fabrice Not
Summary: Rhizaria are significant components of planktonic communities in the oceans and play a major role in biogeochemical cycles, but limited data is available on their cellular carbon and nitrogen content. This study established novel carbon and nitrogen mass to volume equations for Rhizaria taxa, providing important insights for estimating biomass and ecological studies in oceanic ecosystems.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Environmental Sciences
Joseane A. Marques, Simone R. Costa, Anieli C. Maraschi, Carlos E. D. Vieira, Patricia G. Costa, Camila de Martinez Gaspar Martins, Henrique Fragoso Santos, Marta M. Souza, Juliana Z. Sandrini, Adalto Bianchini
Summary: This study investigated the variation in biochemical response related to metal exposure among planktonic communities (micro and mesoplankton) in different locations and seasons from 2018-2020. The results showed that metals affected biomarkers in a non-linear pattern, indicating physiological stress related to metal contamination, especially in sectors contaminated by Fe, Mn, and Cd. The study highlights the complex relationship between metals, biochemical parameters, and seasonality in the marine planktonic community impacted by the Fundao dam rupture.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Jing Chen, Kimitaka Kawamura, Wei Hu, Cong-Qiang Liu, Qiang Zhang, Pingqing Fu
Summary: The study investigated terrestrial lipid biomarkers in marine aerosols collected at Chichijima Island in the western North Pacific for two 4-year periods. The results showed an increase in atmospheric levels of these tracers from 1990-1993 to 2006-2009, with seasonal trends characterized by winter-spring maxima and summer-fall minima. The main source regions of HMW lipids were identified as the Asian continent, Southeast Asia, and the Central Pacific, with stronger positive correlations observed between HMW lipid compounds and levoglucosan during 2006-2009, suggesting a significant contribution from biomass-burning emissions in this century.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geosciences, Multidisciplinary
Francesco Mattei, Michele Scardi
Summary: Phytoplankton primary production plays a key role in oceanographic processes, but global datasets are currently scattered and incomplete. Researchers have compiled and analyzed data from various sources to create a unified dataset, in hopes of providing a convenient resource for those studying marine phytoplankton production.
EARTH SYSTEM SCIENCE DATA
(2021)
Article
Environmental Sciences
Yaoyao Wang, Rong Bi, Jing Zhang, Jiawei Gao, Shigenobu Takeda, Yoshiko Kondo, Fajin Chen, Gui'e Jin, Julian P. Sachs, Meixun Zhao
Summary: This study reports the spatial distribution of phytoplankton biomass and community structure in the surface and deep chlorophyll maximum layers of the Northwest Pacific Ocean. By using lipid biomarkers, the researchers found variations in biomass and phytoplankton composition in different nutrient regimes, with diatoms dominating in the deep chlorophyll maximum layer, enhancing carbon sequestration.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Geography, Physical
Marcia Caruso Bicego, Felipe Rodrigues Santos, Poliana Carvalho de Aandrade Furlan, Rafael Andre Lourenco, Satie Taniguchi, Silvia Helena de Mello E. Sousa, Renata Hanae Nagai, Ana Beatriz Leite Cavalcante, Rubens Cesar Lopes Figueira, Ilana Klein Coaracy Wainer, Michel Michaelovitch de Mahiques
Summary: A combination of sedimentological, molecular, and microfossil proxies was used to study paleoclimatic and paleoceanographic variations along the last 6300 years in the southwestern Atlantic Ocean. The analysis showed the influence of the La Plata River plume on the southwestern Atlantic shelf, with variations in marine productivity, lipid biomarkers, and sea-surface temperature pointing to three distinct phases within the core. The study revealed dry climatic conditions, transition periods, and modern establishment of the La Plata River plume influence on the core site.
Article
Ecology
Maximiliano Rodriguez, Christelle Not
Summary: This study developed temperature calibrations for two shallow marine ostracods, showing that they can be used as paleothermometers for paleoreconstructions. The Mg/Ca ratios of S. impressa and N. delicata ostracods were found to significantly correlate with temperature, with S. impressa being preferred for reconstructions. This method provides valuable information on oceanic circulation at a regional scale.
Article
Geochemistry & Geophysics
Zoe R. van Kemenade, Anna Cutmore, Rick Hennekam, Ellen C. Hopmans, Marcel T. J. van der Meer, Meryem Mojtahid, Frans J. Jorissen, Nicole J. Bale, Gert-Jan Reichart, Jaap S. Sinninghe Damste, Darci Rush
Summary: The sedimentary record of the eastern Mediterranean Sea contains organic-rich 'sapropel' layers, which are caused by periodic anoxic events. Studying these sapropels helps to understand the interactions between marine anoxia and the nitrogen cycle and provides insights into modern deoxygenation and past oceanic anoxic events. The research findings reveal different modes of the nitrogen cycle at different degrees of deoxygenation.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Environmental Sciences
Chao Gao, Xiaoyan Ruan, Yi Ge Zhang, Huan Yang, Xiaotong Xiao, Xiaoxia Lu, Yi Yang, Hongmei Wang, Xiaoguo Yu
Summary: By analyzing lipid biomarkers from a sediment core in the Chukchi Sea shelf, it was found that primary productivity, terrigenous input, and phytoplankton community have changed over the past 70 years. These changes may be attributed to the alteration of water mass structure, which caused intense water mixing and light limitation for phytoplankton growth.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Geochemistry & Geophysics
Bumsoo Kim, Yi Ge Zhang
Summary: In marine sediments, anaerobic methane oxidation (AOM) carried out by consortia of methanotrophic archaea (ANME groups) and sulfate reducing bacteria (SRB) is a major carbon sink for methane, and the Methane Index (MI) measured from sedimentary archaeal lipid biomarkers has been widely used as an indicator for methane impact on sediments. This study shows that MI is linked to sedimentary methane flux and the depth of sulfate-methane transition zone (SMTZ). Furthermore, the study suggests that MI can be used to reconstruct methane history and diagenetic zonation in the geological past.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geosciences, Multidisciplinary
Matthew M. Jones, Bradley B. Sageman, David Selby, Brian R. Jicha, Brad S. Singer, Alan L. Titus
Summary: The study successfully quantifies the duration of the hiatus at the base of OAE2 in the North American Western Interior Basin using new radiometric dating and chemostratigraphic research, advancing the chronostratigraphical understanding of the Cenomanian-Turonian boundary and showing the conformity of geochemical anomalies at the onset of OAE2. The rapid onset of OAE2 may be linked to large igneous province volcanism, with the addition of CO2 potentially driving changes in marine carbonate chemistry, as indicated by the new isotopic data.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2021)
Article
Multidisciplinary Sciences
Sarah E. Crump, Bianca Frechette, Matthew Power, Sam Cutler, Gregory de Wet, Martha K. Raynolds, Jonathan H. Raberg, Jason P. Briner, Elizabeth K. Thomas, Julio Sepulveda, Beth Shapiro, Michael Bunce, Gifford H. Miller
Summary: The study reveals that summer warming is driving a greening trend in the Arctic, potentially amplifying climate change. Past episodes of Arctic warming, such as the Last Interglacial, can help understand vegetation response to temperature change. Ancient DNA records from lake sediment provide insights into vegetation distribution during the Last Interglacial and highlight the importance of combining traditional and molecular approaches for paleoenvironmental studies to better anticipate a warmer future.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Geochemistry & Geophysics
Eun Young Lee, Maria Luisa G. Tejada, Insun Song, Seung Soo Chun, Susanne Gier, Laurent Riquier, Lloyd T. White, Bernhard Schnetger, Hans-Jurgen Brumsack, Matthew M. Jones, Mathieu Martinez
Summary: The petrophysical properties of volcanic rocks are controlled by lithology and subsequent alteration processes. By compiling and correlating petrophysical data with geochemical and mineralogical analyses, it is possible to quantify the alteration intensity of volcanic rocks. The variations in petrophysical properties with alteration intensity can help characterize volcanic stratigraphy and develop exploration strategies for volcanic rocks.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Multidisciplinary Sciences
He Huang, Yuan Gao, Chao Ma, Matthew M. Jones, Christian Zeeden, Daniel E. Ibarra, Huaichun Wu, Chengshan Wang
Summary: The study demonstrates a cyclical pattern of approximately 173 thousand years in organic carbon burial processes in middle to high latitudes. This signal is amplified by internal climate feedbacks of the carbon cycle under different geographic and climate conditions, controlling a series of sensitive climatic processes. The presence of the obliquity amplitude modulation (AM) cycle during the Mesozoic and Cenozoic is confirmed by new and compiled records from multiple proxies.
Article
Geosciences, Multidisciplinary
F. Garrett Boudinot, Sebastian Kopf, Nadia Dildar, Julio Sepulveda
Summary: The study analyzed marine-derived and terrestrial-derived biomarkers from the sedimentary record of OAE2 from the western margin of the Western Interior Seaway to estimate carbon cycle perturbations before and during OAE2. The research revealed multiple short-lived carbon cycle perturbations, including isotopically light carbon pulses, before and during OAE2, highlighting the complex nature of the event and its causes. The reconstructions generally agree with estimates from other locations and proxies around the world, providing new insights into carbon cycle dynamics during OAE2.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2021)
Article
Geography, Physical
Devon B. Gorbey, Elizabeth K. Thomas, Sarah E. Crump, Kayla Hollister, Martha K. Raynolds, Jonathan H. Raberg, Julio Sepulveda, Gifford H. Miller, Gregory De Wet
Summary: This study investigates paleo water isotope records by analyzing the hydrogen isotope composition of plant-derived n-alkanoic acids from Lake Qaupat in Baffin Island, Canada, to understand how the Arctic water cycle responded to climate changes over the past 5.8 ka. Through analyzing plant community changes, it is found that local moisture sources in summer and early autumn have the greatest impact on precipitation isotopes in this region.
JOURNAL OF QUATERNARY SCIENCE
(2022)
Article
Geology
Matthew M. Jones, Sierra Petersen, Allison N. Curley
Summary: The mid-Cretaceous thermal maximum is considered one of the warmest periods in Earth's history, accompanied by significant paleoceanographic changes and the formation of epicontinental seaways. Analyzing Cenomanian oyster fossils revealed extreme mid-latitude warmth in North America, providing insights into Late Cretaceous temperature trends. The findings highlight the potential of clumped isotope paleotemperatures in resolving upper thermal limits of Phanerozoic greenhouse climates.
Article
Multidisciplinary Sciences
Jonathan H. Raberg, Gifford H. Miller, Aslaug Geirsdottir, Julio Sepulveda
Summary: Bacterial brGDGT lipids are widely used in the study of terrestrial paleoclimate, and their distributions are correlated with environmental temperature and pH. This research found strong resemblances in the relationships between brGDGT fractional abundances and both temperature and pH, suggesting a physiological and/or biochemical basis for observed brGDGT distributions.
Article
Geosciences, Multidisciplinary
Matthew M. Jones, Bradley B. Sageman, David Selby, Andrew D. Jacobson, Sietske J. Batenburg, Laurent Riquier, Kenneth G. MacLeod, Brian T. Huber, Kara A. Bogus, Maria Luisa G. Tejada, Junichiro Kuroda, Richard W. Hobbs
Summary: Large-igneous-province volcanic activity during the mid-Cretaceous triggered a global-scale episode of reduced marine oxygen levels known as Oceanic Anoxic Event 2 approximately 94.5 million years ago. It has been hypothesized that this geologically rapid degassing of volcanic carbon dioxide altered seawater carbonate chemistry, affecting marine ecosystems, geochemical cycles and sedimentation.
Article
Environmental Sciences
Lina C. Perez-Angel, Julio Sepulveda, Camilo Montes, Jamila J. Smith, Peter Molnar, Catalina Gonzalez-Arango, Kathryn E. Snell, Nadia Dildar
Summary: This study evaluates the efficacy of stable isotopes in precipitation and plant waxes as proxies for paleoaltimetry and paleohydrology in the northern tropical Andes. Results show a correlation between stable isotope composition and elevation on the eastern flank but not on the western flank. Factors such as mixing of moisture sources, evaporation processes, and differences in vegetation communities may contribute to this discrepancy. Caution should be taken in interpreting paleoelevation and paleoclimate estimates in the western flank.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Biodiversity Conservation
Maya Almaraz, Maegen Simmonds, F. Garrett Boudinot, Alan V. Di Vittorio, Nina Bingham, Sat Darshan S. Khalsa, Steven Ostoja, Kate Scow, Andrew Jones, Iris Holzer, Erin Manaigo, Emily Geoghegan, Heath Goertzen, Whendee L. Silver
Summary: The ongoing climate crisis requires urgent development of management approaches and technologies to reduce atmospheric greenhouse gas concentrations. Soil carbon sequestration provides a low-cost means of removing CO2 from the atmosphere, but its implementation rate is currently too slow to make significant progress toward global emissions goals by 2050.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Heidi E. O'Hora, Sierra Petersen, Johan Vellekoop, Matthew M. Jones, Serena R. Scholz
Summary: This study presents a new paleotemperature record of the Maastrichtian region based on clumped isotope data from fossil bivalves. The results show a mean temperature of 20.4°C, consistent with other estimates, and a notable temperature increase at around 66.4 Ma, likely related to the globally defined Late Maastrichtian Warming Event. Fluctuating seawater δO-18 values suggest alternating influences of warm southern-sourced waters and cool northern-sourced waters.
CLIMATE OF THE PAST
(2022)
Article
Ecology
Jonatha H. Raberg, David J. Harning, Sarah E. Crump, Greg de Wet, Aria Blumm, Sebastian Kopf, Aslaug Geirsdottir, Gifford H. Miller, Julio Sepulveda
Summary: The use of brGDGT distributions in lake sediments for reconstructing terrestrial paleotemperatures is important, but the microbial producers of these membrane lipids remain unknown. Through new high-latitude lake sites and analysis methods, researchers have successfully deciphered the control of temperature, conductivity, and pH on brGDGT, revealed new distribution patterns, and provided a method for exploring the biological underpinnings of their structural diversity.
Article
Multidisciplinary Sciences
Sarah E. Crump, Bianca Frechette, Matthew Power, Sam Cutler, Gregory de Wet, Martha K. Raynolds, Jonathan H. Raberg, Jason P. Briner, Elizabeth K. Thomas, Julio Sepulveda, Beth Shapiro, Michael Bunce, Gifford H. Miller
Summary: The study shows that vegetation changes during the Last Interglacial period in the Arctic had a positive feedback on climate warming, but the lack of high-latitude records limits the complete understanding of vegetation distribution during that time.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Geosciences, Multidisciplinary
David J. Harning, Anne E. Jennings, Denizcan Koseoglu, Simon T. Belt, Aslaug Geirsdottir, Julio Sepulveda
Summary: The study combines data from different sources to detail the impact of the migration of the Arctic and polar fronts on the biological response over the past 8000 years on the North Iceland Shelf, showing the relationship between environmental changes and the position of the fronts. Research on the migration of the Arctic and polar fronts aids in understanding the changes in local productivity in response to climate change.
CLIMATE OF THE PAST
(2021)
Article
Geography, Physical
Huyue Song, Shixue Hu, Michael Benton, Dayong Jiang
Summary: This article examines the end Permian to Middle Triassic interval, which witnessed a significant marine mass extinction and delayed recovery. The focus is on Triassic marine sediments in South China, providing unique documentation of the collapse and recovery of marine ecosystems. Several papers analyze different fossils and their ecological significance, while others study biostratigraphy, reconstruct paleoenvironments, and link records to volcanic eruptions.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Mohammad Firoze Quamar, Upasana Swaroop Banerji, Biswajeet Thakur, Ratan Kar
Summary: The Indian Summer Monsoon is a crucial component of the Asian Monsoon System, impacting rainfall, agricultural productivity, and socio-economic growth in India and nearby regions. The central monsoon zone in India is more responsive to strong monsoon phases than weak ones.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Maria Laura Balestrieri, Valerio Olivetti, David Chew, Luca Zurli, Massimiliano Zattin, Foteini Drakou, Gianluca Cornamusini, Matteo Perotti
Summary: This study presents a multidisciplinary provenance study on legacy cores drilled in the central Ross Sea, Antarctica, providing insights into the oscillation of ice flows and advance and retreat phases of the West Antarctic Ice Sheet.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
P. Depuydt, S. Toucanne, C. Barras, S. Le Houedec, M. Mojtahid
Summary: This study provides a comprehensive overview of the dynamics of the upper branch of the Atlantic Meridional Overturning Circulation (AMOC) in the mid-latitudes of the Northeast Atlantic. It focuses on the European Slope Current (ESC) and its glacial equivalent known as the Glacial Eastern Boundary Current (GEBC). The study reveals significant changes in flow strength and ventilation during the glacial and deglaciation periods, as well as a gradual weakening of the slope current during the Holocene.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Junhee Park, Holly J. Stein, Judith L. Hannah, Svetoslav V. Georgiev, Oyvind Hammer, Snorre Olaussen
Summary: This study reports new Re-Os ages for black shales from Svalbard and evaluates the paleoenvironment during organic-rich shale deposition. The study also proposes correlations of specific Late Jurassic ammonite zones between the Boreal and Tethyan realms.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Guocheng Dong, Weijian Zhou, Feng Xian, Yunchong Fu, Li Zhang, Ling Tang, Pengkai Ding
Summary: The cause of ice-age cycles is still not fully understood, and studying the timing and magnitude of mountain glaciations can provide valuable insights. This study presents new dating results from the Niqingqu Valley in the Tibetan Plateau, showing multiple glacial activities prior to the Penultimate Glacial Maximum. The findings suggest that low atmospheric CO2 content and reduced summer solar insolation/high summer-monsoon precipitation played a role in these glacial fluctuations.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Haoran Dong, Zhitong Chen, Yucheng Wang, Jie Chen, Zhiping Zhang, Zhongwei Shen, Xinwei Yan, Jianbao Liu
Summary: Through sediment records from Lake Nanyi in the lower Yangtze, we found that anthropogenic fire activity played a dominant role in the region, and the temporal pattern of fire activity was asynchronous from east to west. Archaeological evidence suggests an inverse relationship between agricultural and population levels and fire intensity during the mid-Holocene, with fire intensity being influenced by the diversity of landscape types associated with pre-historic subsistence patterns. Overall, changes in regional water-level delayed the transition from hunting-gathering to agriculture in the lower Yangtze region.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Giovanni Coletti, Giulia Bosio, Alberto Collareta, Or Mordecai Bialik, Eleonora Regattieri, Irene Cornacchia, Gianni Insacco, John Buckeridge
Summary: This paper argues that sessile barnacles are an excellent proxy for palaeoenvironmental reconstructions. The shells of barnacles consist of diagenetically stable low-magnesium calcite and record short-term variations. Analyses of several Western Mediterranean barnacle-rich deposits demonstrate the utility of barnacles as proxies for water depth, distance from the coastline, and hydrodynamic conditions. Moreover, the stable isotope ratios of barnacle shells can provide detailed palaeoenvironmental information.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Feng Wu, Xinong Xie, Wen Yan, Youhua Zhu, Beichen Chen, Jianuo Chen, Mo Zhou
Summary: This paper describes the Quaternary evolution of Meiji Atoll in the southern South China Sea. The findings show how variations in sea surface temperature, eustatic sea level, and tectonics have influenced the development of the atoll. These findings have broader implications for understanding the Quaternary evolution of similar tropical carbonate atolls in the region.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Ana Mateos, Ericson Hoelzchen, Jesus Rodriguez
Summary: The Epivillafranchian and the transition to the Galerian was a period of environmental fluctuations and faunal turnover. Hominins and giant hyenas could coexist during the Epivillafranchian, but the transition to the Galerian led to a disruption of the scavenging niche, coinciding with the extinction of P. brevirostris.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Tianyu Du, Wensheng Zhang, Bing Li, Linjing Liu, Yuecong Li, Yawen Ge, Shiyong Yu
Summary: This article presents sedimentary evidence for a dramatic channel displacement of the lower Yellow River about 3000-2600 years ago, and explains the impact of this displacement on the geomorphology and human migration.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Johann Mueller, Michael M. Joachimski, Oliver Lehnert, Peep Mannik, Yadong Sun
Summary: The Late Ordovician mass extinction occurred during an ice age, with maximum ice coverage and a substantial drop in global sea level. This led to the exposure or shallowing of shallow tropical shelf environments. The study suggests that the burial rate of nutrient phosphorus (P) on shelves was minimal during this glacial period, leading to excess bioavailable P entering the open ocean and stimulating phytoplankton production, which in turn lowered oxygen concentrations.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Marina Addante, Patrizia Maiorano, Giovanna Scopelliti, Angela Girone, Maria Marino, Samanta Trotta, Antonio Caruso
Summary: This study presents the first high-resolution results on planktonic foraminiferal stable oxygen isotopes and calcareous plankton assemblages, providing insights into the glacial-interglacial variability and North Atlantic climate variability. The research also reveals evidence of the first significant southward migration of the Subarctic Front in the mid-latitudes.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Bing-Cai Liu, Rui-Wen Zong, Kai Wang, Jiao Bai, Yi Wang, Hong-He Xu
Summary: Phytogeography plays a vital role in the evolution of plants. This paper describes a new species of a spore-bearing plant from the upper Silurian period in West Junggar, China. By analyzing global Silurian macrofossil records, the study reveals the spatial-temporal distribution of Silurian plant macrofossils and identifies two phytogeographic realms during the Pridoli Epoch.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Francois Fournier, Thomas Teillet, Alexis Licht, Jean Borgomano, Lucien Montaggioni
Summary: This study investigates the temporal evolution of neritic carbonates in the proto-South China Sea to reconstruct East Asian monsoonal currents and winds during the middle to late Paleogene. The results highlight that many of the features of the summer East Asian Monsoon large-scale circulation are rooted in the middle Paleogene.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)