Article
Environmental Sciences
Dongya Han, Qinxuan Hou, Jiangmin Song, Ruinan Liu, Yong Qian, Guanxing Huang
Summary: This study investigates the concentration, distribution, ecological and human health risks, and potential sources of antibiotics in groundwater in the Hutuo River alluvial-pluvial fan, North China Plain. The results show the presence of antibiotics in groundwater, primarily originating from livestock manure, posing medium ecological risks to aquatic organisms but no risks to human health.
ENVIRONMENTAL RESEARCH
(2023)
Article
Geography, Physical
Pascal Bertran, Isabelle Couchoud, Karine Charlier, Christine Hatte, Yannick Lefrais, Nicole Limondin-Lozouet, Alain Queffelec
Summary: This study investigates the origin of white calcite silts found in alluvial fan deposits in the Dronne Valley, France. It is concluded that these deposits were likely formed in a deep seasonal frost context and are characterized by a strata-like pattern and the lack of identifiable biological structures. The isotopic composition of these calcite silts suggests that they were precipitated in a closed-system environment, possibly from waters close to saturation with respect to calcite freezing. These findings have important implications for understanding sedimentation and the geological record in southwest France during the Last Glacial Maximum.
PERMAFROST AND PERIGLACIAL PROCESSES
(2023)
Article
Geography
Ulrike Maria Hardenbicker, Christina L. Kelly, Makiko Watanabe, Roberta Kotowich
Summary: Alluvial fan sediments provide valuable information on environmental change and human influences, serving as a record of landscape development. This paper analyzes sedimentary information from core samples collected from two alluvial fans in the Saskatchewan prairies, examining grain size, organic matter content, and microfossil presence. The study uses weathering indices to assess modern source samples and borehole cores, revealing patterns of leaching intensity and soil stability over time.
CANADIAN GEOGRAPHER-GEOGRAPHE CANADIEN
(2022)
Article
Geography, Physical
Elena T. Bruni, Richard F. Ott, Vincenzo Picotti, Negar Haghipour, Karl W. Wegmann, Sean F. Gallen
Summary: Recent studies challenge the traditional view that alluvial fan and terrace formation is a response to Quaternary climate oscillations, suggesting instead that these landforms can evolve rapidly in response to catastrophic events. A study in the Klados catchment in Crete shows that the thick alluvial sequences there were formed in the late Holocene, and a valley-filling landslide may have been the source of sediment filling. The findings suggest that the rapid aggradation and incision cycles of the alluvial sediments may not be linked to long-term tectonic or climatic factors, but rather to stochastic events such as large earthquakes or storm events.
EARTH SURFACE DYNAMICS
(2021)
Article
Geosciences, Multidisciplinary
Peng Lu, Jianqing Lu, Yijie Zhuang, Panpan Chen, Hui Wang, Yan Tian, Duowen Mo, Junjie Xu, Wanfa Gu, Yayi Hu, Qingli Wei, Lijie Yan, Xia Wang, Haiguo Zhai
Summary: The study reconstructed Late Pleistocene-Holocene landscapes in the northeastern Songshan Region of Central China and identified three distinctive models of landscape evolution. Different areas exhibited variations in river aggradation and incision, leading to a diverse landscape pattern.
Article
Multidisciplinary Sciences
Eniko Katalin Magyari, Mihaly Gasparik, Istvan Major, Gyorgy Lengyel, Ilona Pal, Attila Virag, Janos Korponai, Aritina Haliuc, Zoltan Szabo, Piroska Pazonyi
Summary: The study investigates the local extinction times and associated changes in environment and human population during the last glacial termination, aiming to understand the reasons behind mega- and microfauna extinctions. The findings suggest a decrease in the population of large herbivores in East-Central Europe around 17,700 cal BP, coinciding with an increase in temperate tree abundance and warm continental steppe cover. The decline in herbivore fauna slightly preceded changes in vegetation, indicating a potential influence of population decline on vegetation changes. The Late Epigravettian population showed a high degree of quarry-fidelity, leaving the region when these mammals vanished.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Studies
Hsin-Yu Chen, Chia-Chi Huang, Hsin-Fu Yeh
Summary: The study demonstrates that climate factors played a significant role in runoff changes, with a transition point in 2003 where these factors contributed over 90% of the change, while human activities had a relatively small impact. Additionally, both the Budyko method and Normalized Difference Vegetation Index (NDVI) indicated a decrease in vegetation cover.
Article
Geosciences, Multidisciplinary
Yuan Li, Xiaozhong Huang, Lixiong Xiang, Jun Zhang, Yue Xu, Lihui Tian, Yanxiang Jin, Xin Jin, Yongtao Zhao, Lele Ren, Hui Zhao
Summary: This study provides insights into the Holocene hydroclimatic change in arid central Asia by analyzing sedimentary records from Kanas Lake. The results suggest that regional precipitation is the main driving factor for the hydrological environment changes in glacier-fed lakes, and increased precipitation greatly intensified the trans-Eurasian dispersal of crops and livestock.
Article
Geography, Physical
Yanyan Yu, Feng He, Stephen J. Vavrus, Amber Johnson, Haibin Wu, Wenchao Zhang, Qiuzhen Yin, Junyi Ge, Chenglong Deng, Michael D. Petraglia, Zhengtang Guo
Summary: Through the study of soil models and climate simulations, we found that precipitation and temperature were the main climate factors influencing the population expansion in Eurasia from the Late Pleistocene to the Early Holocene. Changes in population size in low latitude regions were mainly controlled by precipitation, while temperature played a dominant role in the middle-high latitude regions. These findings provide important clues for understanding the human dispersal during the Late Pleistocene.
GLOBAL AND PLANETARY CHANGE
(2023)
Article
Biology
Ebuka Canisius Nwosu, Achim Brauer, Marie-Eve Monchamp, Sylvia Pinkerneil, Alexander Bartholomaeus, Martin Theuerkauf, Jens-Peter Schmidt, Kathleen R. Stoof-Leichsenring, Theresa Wietelmann, Jerome Kaiser, Dirk Wagner, Susanne Liebner
Summary: Analysis of sedimentary DNA in a German lake reveals a spike in cyanobacteria abundance during the Bronze Age and the past century due to human activities. This high-resolution molecular analysis provides evidence that humans have been impacting lake ecology for millennia. Managing aquatic systems today requires awareness of the long-term legacy of human influence.
COMMUNICATIONS BIOLOGY
(2023)
Article
Geochemistry & Geophysics
Yaroslav Kuzmin, Sergey Leshchinskiy, Vasily N. Zenin, Elena M. Burkanova, Elya P. Zazovskaya, Aleksandra S. Samandrosova
Summary: This article presents the chronology of the notable paleontological and archaeological site of Volchia Griva in the southern part of the West Siberian Plain. Through 14C dating, the ages of animal bones from three stratigraphic levels have been established. It is suggested that Upper Paleolithic people inhabited the site during the second part of the Last Glacial Maximum, indicating their adaptation to the cold and dry climate in the region.
Article
Anthropology
Anastasia Nikulina, Katharine MacDonald, Fulco Scherjon, Elena A. Pearce, Marco Davoli, Jens-Christian Svenning, Emily Vella, Marie-Jose Gaillard, Anhelina Zapolska, Frank Arthur, Alexandre Martinez, Kailin Hatlestad, Florence Mazier, Maria Antonia Serge, Karl-Johan Lindholm, Ralph Fyfe, Hans Renssen, Didier M. Roche, Sjoerd Kluiving, Wil Roebroeks
Summary: This study reviews paleoenvironmental proxies and their relevance for understanding hunter-gatherer niche construction activities in pre-agricultural Europe. The findings suggest that existing proxies are unable to establish clear differences between anthropogenic, climatic, and megafaunal impacts during different time periods. The study also highlights the similarities in landscape impacts between Neanderthals and humans during the Mesolithic period. Further research is needed to determine the local versus larger-scale effects of hunter-gatherer impact on landscapes during both time periods and gather comparative data on population sizes.
JOURNAL OF ARCHAEOLOGICAL METHOD AND THEORY
(2022)
Review
Environmental Sciences
Juan P. Munoz, Eduardo Silva-Pavez, Diego Carrillo-Beltran, Gloria M. Calaf
Summary: This study aimed to review glyphosate occurrence and exposure since 2015, considering studies associated with environmental or occupational exposure and the epidemiological assessment of cancer risk. The results showed that herbicide residues were detectable in all spheres of the earth and studies on the population showed an increase in glyphosate concentration in biofluids. However, the reviewed epidemiological studies provided limited evidence for the carcinogenicity of glyphosate, which was consistent with the International Agency for Research on Cancer classification as a probable carcinogen.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Ying Fan, Zongshan Zhao, Rongguang Shi, Xiaohua Li, Yanying Yang, Jing Lan
Summary: The study found that with the advancement of urbanization, the concentration of PAH in soil is increasing, and the main sources are also changing. Due to the changes in PAH emission sources, the cancer risk of residents exposed to soil PAHs has also increased.
ENVIRONMENTAL CHEMISTRY LETTERS
(2021)
Article
Energy & Fuels
Randa Permanda, Tomoyuki Ohtani
Summary: Alluvial fans are suitable areas for installing open-loop geothermal heat pump systems due to their shallower aquifers and faster groundwater flow. This research aims to understand the thermal impact of open-loop GHP systems on alluvial fans. The results from the models show that areas with faster groundwater flow have smaller thermal impacts.
Article
Geosciences, Multidisciplinary
David Dominguez-Santos, Daniel Valderrama, Ahmet Utku Yazgan
Summary: This document presents a study comparing the spectra of large-magnitude seismic records in Chile between 2012 and 2022 with the design spectra of NCh433 and D. S 61. The aim is to determine if Chile's seismic-resistant regulations are updated to the existing reality and propose new design spectra that better represent the seismic activity in Chile during the last decade.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Prabhu Palanisamy, Vivek Sivakumar, Priya Velusamy, Logesh Natarajan
Summary: Shoreline changes in the southern coast of Rio de Janeiro, Brazil, were analyzed from 1986 to 2018. The study found that both natural and human factors significantly impact shoreline changes. The findings provided important insights into predicting future shoreline positions and identifying vulnerable regions. Additionally, human activities were found to influence shoreline change models, emphasizing the need for effective management strategies to protect ecosystems and communities.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Irina Salgado Bernal, Periyasamy Sivalingam, Armando Martinez Sardina, Michel Manduca Artiles, Maria E. Carballo Valdes, John Pote
Summary: This study investigated the presence of 15 toxic metals in surface sediment in a tropical river ecosystem in Cuba. The results showed that the sediments had higher concentrations of four metals compared to Cuban norms. Various contamination indices were calculated, and correlations analysis revealed the main sources of contamination. The study provides important information for the management of the river and emphasizes the need for metal pollution control and monitoring.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Camila Morgan, Eduardo Morgado, Miguel-Angel Parada, Raimundo Brahm, Francisca Mallea-Lillo
Summary: Lanin volcano is a composite volcano in the Andes, which has erupted lava flows with different compositions. The volcano's magma reservoir contains a crystal mush, and the pre-eruptive conditions include temperature, pressure, and oxygen fugacity. Fractional crystallisation has led to the evolution of the magma with different compositions.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Benjamin Idini, Sergio Ruiz, Jean-Paul Ampuero, Felipe Leyton, Efrain Rivera
Summary: This study investigates the role of wedge integrity on the frequency content of strong ground motion produced by subduction earthquakes in Northern Chile. The results show that the frequency characteristics of seismic waves vary with hypocentral distance, indicating lateral variations in anelastic attenuation due to the heterogeneous tectonic structure.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)