History Research Articles

Конструирование исторической памяти о революции 1917 года в школьных учебниках Азербайджанской республики (2018–2023 годы)

The paper deals with the main conceptual approaches to the presentation of the events of the February and October stages of the 1917 Revolution in the school textbooks of the Republic of Azerbaijan. Considerable attention is paid to the national component of the 1917 Revolution – the formation of the First Republic (Azerbaijan Democratic Republic) and the Second Republic (Azerbaijan SSR). The content of textbooks on academic subjects “History of Azerbaijan” for grades 5, 9, 11 and “General History” for grades 9, 11 published in 2018 - 2023 was analyzed.

Projected effects of climate change on meteorological droughts over China: A study based on high-resolution NEX-GDDP data

Abstract While historical observations reveal increases in meteorological drought frequency across China during 1960-2021, future drought characteristics at the regional scale are uncertain. We evaluate historic and 21st century-projected dryness changes using the NASA Earth Exchange Global Daily Downscaled Projections (NEX-GDDP) 0.25deg resolution dataset for representation concentration pathway (RCP) 4.5 and 8.5. The 20 model NEX-GDDP ensemble mean precipitation and derived potential evapotranspiration, which is calculated by utilizing Thornthwaite approach, are consistent with gridded station data over China from 1961 to 2005. Results show that the projections of occurrence frequency of moderate drought based on standardized precipitation evapotranspiration index (SPEI) increase remarkably under RCP4.5 scenario, and the significant increasing frequency is seen for severe drought under RCP8.5 scenario, while few extreme dryness occurs during the 21st century under both emission scenarios. More moderate drought projections are found over northwestern, northern, and southeastern regions under RCP4.5 scenario, but the entire China will face severe droughts for RCP8.5. The areas affected by moderate droughts begin to extend rapidly around 2030s at both national and regional scales for RCP4.5 scenario, and the substantial increases in drying area extension for RCP 8.5 appears around 2050s. Particularly, the severe drought areas are found to grow much sharply after the 2070s under RCP 8.5 scenario, implying that the occurrences of severe droughts over China are more sensitive to greenhouse gas emissions.

Основоположники арабо-мусульманской историографии (IX–начала x века)

The culmination of the “Golden Age” of Islamic literary culture was the multivolume “History of the Prophets and Kings” (Ta’rīḫ ar-Rusul wa-l-Mulūk) by the “father of Muslim historiography”, an Arabic spoken Iranian Muḥammad b. Ǧarīr (Djarir) aṭ-Ṭabarī (839–923), which outlines the general history since the Creation, as well as the works of other founders of the Islamic historiography in Classical Arabic – al-Kūfī, Ḫalīfa b. Ḫayyāṭ (Khalifah b. Khayyat), ad- Dīnawarī, al-Balāḏurī (al-Beladsori), al-Ya‘qūbī (al-Ja‘qubi). The breakthrough works by these authors contain a lot of data concerning the countries and peoples of the Armenian Highlands, Caucasus, Asia Minor, and North-Western Iran (Atropatene-Azerbaijan), as well as adjacent areas of the Mesopotamia, Media, and Syria from Ancient times to the early of the 10th c. These materials may well be of interest to readers of the periodical “Studies in oriental sources” (Institute of Oriental Studies, National Academy of Sciences of the Republic of Armenia).

Research on the Academic Inheritance of the Traditional Performance of Hilgasan Khuur

Shen Kuo, a scholar in the Northern Song Dynasty, wrote in Mengxi Bi Tan: "The Hilgasan Khuur follows the Han Dynasty, and the music still complains about the Chanyu." This is the earliest record of the term Hilgasan Khuur in history books. Hilgasan Khuur refers to bowed string instruments made of Hilgasan and carried by northern nomadic peoples. It originated from the Xiongnu and has been passed down to this day. The traditional Mongolian bowed string instruments such as the Morin Khuur, Khorchin Choor, Chahar Hiil, and OirdsYekel all belong to this category. As a bowed string instrument that has been passed down for thousands of years and carries a profound historical and cultural heritage, the inheritance and protection of the traditional playing method of the Hilgasan Khuur faces the impact and challenges of the development of modern music. This article summarizes the artistic characteristics of the four tuning methods, four playing methods and related traditional repertoires of the four instruments of the Hilgasan Khuur. By analyzing the history and current situation of the academic inheritance of the Hilgasan Khuur, it reveals the advantages and challenges of the academic inheritance. It emphasizes that under the background of national policies and the protection of intangible cultural heritage, promoting the academic inheritance of the traditional playing method of the Hilgasan Khuur has far-reaching significance for protecting the musical diversity of the Hilgasan Khuur and promoting national traditional culture.

Detection and Attribution of Changes in Precipitation Extremes in China and Its Different Climate Zones

Abstract Based on the observations and the phase 6 of Coupled Model Intercomparison Project (CMIP6) multimodel simulations, we conducted a detection and attribution analysis for the observed changes in intensity and frequency indices of extreme precipitation during 1961–2014 over the whole of China and within distinct climate regions across the country. A space–time analysis is simultaneously applied in detection so that spatial structure on the signals is considered. Results show that the CMIP6 models can simulate the observed general increases of extreme precipitation indices during the historical period except for the drying trends from southwestern to northeastern China. The anthropogenic (ANT) signal is detectable and attributable to the observed increase of extreme precipitation over China, with human-induced greenhouse gas (GHG) increases being the dominant contributor. Additionally, we also detected the ANT and GHG signals in China’s temperate continental, subtropical–tropical monsoon, and plateau mountain climate zones, demonstrating the role of human activity in historical extreme precipitation changes on much smaller spatial scales. Significance Statement The observed intensification of extreme precipitation globally has been attributed to human influences. Here, we demonstrate that anthropogenic forcing has discernably intensified extreme precipitation over the period 1961–2014, over China and in three of its four climate zones, with human-induced greenhouse gas increases being the dominant contributor. Our results strengthen the body of evidence that greenhouse gas increases are intensifying extreme precipitation by quantifying their role in observed changes at smaller regional scales than previously reported.

Inter- and Intra-Annual Variations in Oak Tree Ring δ13C Values across Different Elevations and Their Climatic Responses in Qinling Mountains

The Qinling Mountains, serving as a natural geographical and climatic boundary in China, require comprehensive climatic records to elucidate the trends in climate changes across the country. While stable isotopes in tree rings are widely employed to indicate historical environmental changes, investigations into tree ring isotopes in the Qinling Mountains, particularly within the widespread broad-leaf oaks, remain limited. In this study, we investigated both intra- and inter-annual variations in the δ13C values of tree rings and their correlations with climatic signals over the past two decades for Quercus aliena var. acuteserrata, a dominant species among oak trees on the main peak of the Qinling Mountains. Our results reveal that responses to climate differ among altitudes and individual trees, with trees at higher altitudes exhibiting higher sensitivity to extreme climate, which is low temperatures and rainfall fluctuations during the growth period in intra-annual δ13C variations. Furthermore, the positive correlations are observed between temperature during growing season and both tree growth and the inter-annual δ13C variations. However, the climate signal appears to be hampered by oak-specific factors, such as intense competition among individuals and the age of trees. Therefore, we suggest a more rigorous selection of sampling and propose further investigations into isotopic fractionation processes in oaks for future studies.

Decoupling Sources of Anthropogenic Influences on Sediments of the Visovac Lake (Krka National Park, Croatia) Using Multiparametric Approach.

Historical changes of sediment characteristics and levels of inorganic and organic contaminants were studied in dated sediment cores from the Visovac Lake, situated in the Krka National Park, Croatia, to identify the main sources of anthropogenic pressures on this highly protected system. Depth distributions of lithogenic elements showed a steady decrease of terrigenous inputs due to the reduction in agricultural activities in the area, which was particularly pronounced during the 1991-1995 war in Croatia. Vertical and longitudinal distributions of Cd and Zn indicated that they are predominately of anthropogenic origin. The historical profiles of these toxic metals coincide well with the recorded production of metal industry in the upper reach of the Krka River with a sharp decrease reflecting the interruption by the war and slow recovery afterwards. By contrast, the recovery of the tourist industry in Krka NP after the war was accompanied by increasing contamination by elements characteristic of boat and car traffic (Sn, Cu, Pb) as well as oil pollution. The contamination with polycyclic aromatic hydrocarbons and polychlorinated biphenyls was only moderate. Although levels of metallic and organic contamination can be considered relatively low, the observed shift from industrial to tourism-related sources indicated that touristic activities should also be regarded as a possible threat for this vulnerable karst aquatic ecosystem.

Spatial variability of sedimentary assemblages reflects variations in bioerosion pressure of adjacent coral reefs.

The composition of coral-reef sediments is highly variable across space and time, and differences in the life histories of the dominant calcifying organisms on reefs contribute to the heterogeneity of reef sediments. Previous studies have suggested that variations in coral-reef bioerosion can influence spatial and temporal variations of sedimentary assemblages: elevated erosion rates of dead coral skeletons can trigger a pulse of coral-derived sediments and cause a shift in the dominance of sedimentary grains from coralline algae, such as Halimeda, to coral. We assessed the variability of the sedimentary composition and bioerosion rates of reefs at different spatial scales to determine the association between these two variables. We surveyed the benthic assemblages on reefs exhibiting different ecological states and collected samples of the associated sediments. We calculated the carbonate budget for each site and compared their variability at different hierarchical levels to the variability of their respective sedimentary assemblages. At the scale of sites (1-10 km), Halimeda cover was a significant predictor of the relative abundance of Halimeda grains. Both the relative abundance of coral grains and reef bioerosion rates varied significantly at the scale of locality (tens to hundreds of km), with high abundances of coral grains in the sediments coinciding with high rates of bioerosion. The main drivers of bioerosion at our localities were parrotfish assemblages dominated by large size classes of excavating species such as Sparisoma viride. Reef sediments may reflect the gross degree of bioerosion pressure that reefs experience, and historical changes in bioerosion rates could potentially be assessed by examining the sediments across temporal scales.

Historical Cohort Differences in Views on Aging in the US: A Trend Toward Longer Midlife but Older Felt Age.

This study compared equal age groups from two cohorts from the Midlife in the United States (MIDUS) study surveyed at different times to characterize societal changes in measures of subjective age and age threshold. Two successive MIDUS cohorts were utilized (1995-1996 and 2011-2014; age range 25-74). Outcomes included subjective age (felt age and desired age) and age threshold. Following multiple imputations of missing data and balancing methods, weighted linear regression measured associations between subjective age outcomes and cohort, sex, and chronological age. Individuals of the later MIDUS cohort reported older felt age and younger desired age in middle age groups (35-64 years old). An increase in age threshold was observed only in older age groups (65+). Possible underlying historical changes in health and societal age stereotypes are explored to explain the observed trend toward older felt age and age threshold, but a younger desired age.

Agricultural Productivity and Climate Mitigation

Agriculture will play a central role in meeting greenhouse gas (GHG) emission targets, as the sector currently contributes ∼22% of global emissions. Because emissions are directly tied to resources employed in farm production, such as land, fertilizer, and ruminant animals, the productivity of input use tends to be inversely related to emissions intensity. We review evidence on how productivity gains in agriculture have contributed to historical changes in emissions, how they affect land use emissions both locally and globally, and how investments in research and development (R&D) affect productivity and therefore emissions. The world average agricultural emissions intensity fell by more than half since 1990, with a strong correlation between a region's agricultural productivity growth and reduction in emissions intensity. Additional investment in agricultural R&D offers an opportunity for cost-effective (<US$30 per ton carbon dioxide) and large-scale emissions reductions. Innovations that target specific commodities or inputs could even further reduce the cost of climate mitigation in agriculture.

Spatial and historical patterns of sedimentary organic matter sources and environmental changes in the Ross Sea, Antarctic: implication from bulk and n-alkane proxies

Organic carbon (OC) burial in the Antarctic marginal seas is essential for regulating global climate, particularly due to its association with ice shelf retreat. Here, we analyzed total OC (TOC), total nitrogen (TN), radiocarbon isotope, n-alkanes and relative indicators in surface and core sediments from the Ross Sea, West Antarctica. Our aim was to investigate spatial and historical changes in OC sources, and to explore the influencing factors and implications for ice shelf retreat since the last glacial maximum (LGM). Our results revealed distinct spatial patterns of OC sources as indicated by n-alkane indicators in surface sediments. In the Western Ross Sea, n-alkanes predominantly originated from phytoplankton and bacteria, as evidenced by their unimodal distribution, low carbon preference index (CPI) of short-chain n-alkanes (CPIL = 1.41 ± 0.30), and low terrestrial/aquatic ratio (TAR = 0.22 ± 0.14). In the Southwest Ross Sea, n-alkanes were derived from marine algae and terrestrial bryophytes, indicated by bimodal distribution, low ratio of low/high molecular-weight n-alkanes (L/H = 0.62 ± 0.21), low CPI of long-chain n-alkanes (CPIH = 1.18 ± 0.16), and high TAR (1.26 ± 0.66). In contrast, the Eastern Ross Sea exhibited n-alkanes that were a combination of phytoplankton and dust from Antarctic soils and/or leaf waxes from mid-latitude higher plant, as suggested by both unimodal and bimodal distributions, high L/H (1.60 ± 0.58) and CPIH (2.04 ± 0.28), and medium TAR (0.61 ± 0.30). Geologically, during the LGM (27.3 – 21.0 ka before present (BP)), there was an increased supply of terrestrial OC (TOC/TN = 13.63 ± 1.29, bimodal distribution of n-alkanes with main carbon peaks at nC17/nC19 and nC27). From 21.0 to 8.2 ka BP, as glaciers retreated and temperatures rose, the proportion of marine n-alkanes significantly increased (TOC/TN = 9.09 ± 1.82, bimodal distribution of n-alkanes with main carbon peaks at nC18/nC19 and nC25). From 8.2 ka BP to the present, as the ice shelf continued to retreat to its current position, the marine contribution became dominant (TOC/TN = 8.18 ± 0.51, unimodal distribution of n-alkanes with main carbon peak at nC17/nC18/nC19, and low TAR (0.41 ± 0.32)). This research has significant implications for understanding the variations in Antarctic OC sources and their climatic impacts in the context of accelerated glacier melting.

Game-based Learning for History: Student Perceptions and Preferences

With the rapid development of games in the 21st century, the panoply of games on history shows a wide variety. Backstories from most historical eras have been implemented in different game genres and modalities. Furthermore, a growing number of studies have pointed to the didactic potential of historical games as learning tools. This study aims at investigating university students' perceptions of gaming and their game preferences, with a particular focus on history. The research question to answer was: "What types of games do history students play, and how can games, in their view, contribute to learning in their subject?" Educational action research was used as the overall strategy in a study where data was collected from five different university course groups in general history at the basic level. Students answered questionnaires with open ended questions about gaming preferences and their perceptions of games. The answers were then analysed in an inductive thematic analysis. Findings show that the students play a mix of analogue board games, digital games and hybrid forms. In the transmedial array of games available, important genres include role playing games, strategy games, quizzes and first-person action games. The students frequently provide arguments for the use of games in history education, and they give reasons why they find a particular game useful for this purpose. They describe how these games have a potential to add value to history education. To some extent, they also discuss how this can be implemented. In conclusion, the authors argue that so-called technology tree games are particularly relevant to learning history from a structural perspective, while RPG:s can strengthen interpretive approaches through a subjective historical experience.

”Un compositeur d’un grand mêrite” i Paris – Laura Netzel och hennes kammarmusik vid ingången till kvinnornas århundrade

An interest in women in Nordic music history and a fascination with Laura Netzel's (1839–1927) chamber music characterises this article. In addition to focusing on works, reception, and context, the article examines the question of what role did gender play in the reception of Netzel's and her women colleagues' chamber music? How is the reviewers' understandings of gender and originality intertwined into their texts in daily newspapers and music magazines? And finally: Do possibilities for a transformation towards a more equal chamber music repertoire and more equal music history books exist? Despite Anna Rogstad's (1854–1938) predictions that the 20th century would become "the women's century," the concert scene, and the chamber music environment in particular, was characterized by gender-related prejudices. Still, Laura Netzel received recognition for her great originality and captivating musicality when she stayed in Paris at the turn of the century. In contrast to her male Nordic colleagues, she received glowing reviews where the works are described as bold and permeated with a Nordic tone. The article focuses on two chamber music works from one of her stays in Paris: Cello Sonata, opus 66 and Piano Trio in D minor, opus 78. In the Sonata for Cello and Piano, we encounter a very expressive and mature, but also bold, forward rushing and adventurous Netzel. The style is late Romantic, but also clearly influenced by contemporary French music and in constant development. The harmonics are exploratory, but never proved too demanding for the audience and critics of the time. The Trio for Violin, Cello and Piano in D minor was premiered in 1903 at La société Musique Nouvelle with Netzel herself at the piano. Enthusiastic Scandinavians in the audience were seated together with several famous music authorities of the French capital. Le Monde musical praised it for being written with such great confidence.

Obiajulu’s Children and the Wicked Sons of Eli (1 Sam 2:11–17)

The two sons of Eli, Hophni and Phinehas (1 Sam 2:11-36), served along with their father as priests at Shiloh in the tabernacle, where the ark of the covenant was housed (11am 1:3). While in service, Eli’s children became sons of worthlessness (bənȇ-bəliyyaʿal), dishonest, wicked and corrupt, as well as refused to know the Lord (lō’ yāḏə‘û ՚eṯ-ʾădōnāi) and his teachings. They were unrighteous, greedy, intimidating, immoral, and abusive to women at the entrance of the temple (vv. 12-22). Eli did little to correct them, leading to God’s punishment. Some scholars have examined this narrative with Western historical models, lacking African stories, cultures, customs, and experiences, where there are similar incidences of children’s misbehaviors and challenges of their upbringing in the African context. Using an African Biblical Hermeneutical approach with illustrative stories from Zain E. Asher’s memoir, “Where the Children Take Us: How One Family Achieved the Unimaginable,” this work contextually examines 1 Sam 2:11-17, within the theological contexts of the Books of Samuel and Deuteronomistic History (Josh–2 Kings). It compares Obiajulu’s disciplined and trained children (Obinze, Chiwetel, Zain, Kandibe) and the obedient boy, Samuel (vv. 18-22), with the consequences of the blasphemies and corruption of Eli’s children (vv. 11-17). It proposes lessons that no matter how we perform our duties in the church, schools and families, sadness may still come if we neglect to train our children responsibly in righteousness, integrity, hard work, and in the fear of the Lord.

Prevalence of anemia and related factors among Tabari cohort population: a cross-sectional study

BackgroundAnemia presents a considerable public health challenge, standing as a leading contributor to elevated rates of mortality and morbidity. Therefore, this study aimed to investigate the prevalence of anemia and related factors among Tabari cohort population.MethodsThis study involved a cross-sectional investigation carried out during the enrollment phase of the Tabari cohort. The Tabari cohort is a subset of the larger nationwide cohort study known as the “Prospective Epidemiological Research Studies in IrAN” (PERSIAN) cohort. The collected data included general information, anthropometric measurements, medical history and blood samples. Anemia was defined as a hemoglobin level less than 13 mg/dL for men and less than 12 mg/dL for women. Data were analyzed using SPSS V.16.ResultsOut of the 10,073 participants included in the analysis, 1,352 individuals (13.4%) were diagnosed with anemia. In the multiple regression analysis, the odds of anemia were significantly 2.31 times in females compared to males, 3.69 times in urban residents compared to rural residents, 1.41 times in social economic categories of IV and 1.35 in social economic categories of V compared to social economic categories of I, 1.70 times in drug abuse compared to non-drug abuse, 0.71 times in body mass index (BMI) categories of 25–29.9 kg/m² and 0.70 in BMI ≥ 30 kg/m² compared to BMI < 25, 0.77 times for triglycerides(TG) > 150 compared to below 150, 0.76 times for total cholesterol(TC) > 200 compared to below 200, 0.83 times for high waist-to-hip ratio (WHR) compared to low WHR, 1.33 times in low High-density Lipoprotein (HDL) compared to high HDL, 1.18 times in diabetics (DM) compared to non-DM, and 1.37 times in individuals with coronary heart diseases (CHD) compared to healthy individuals.ConclusionAnemia was a prevalent condition among Tabari cohort population. Several conditions including female gender, urban residence, Social economic level of IV and V, drug abuse, low HDL, high WHR, DM, and CHD conditions were significantly associated with increased odds of anemia. Furthermore, BMI categories of 25–29.9 kg/m² and ≥ 30 kg/m², high TC and high TG were significantly associated with decreased odds of anemia among this population.

Sedimentary antimony stable isotope record of anthropogenic contamination in a karst lake in southwestern China

Anthropogenic sources of antimony (Sb) are an important driver of pollution in the Earth environment, but their roles in the historical changes of Sb pollution in lake ecosystems are currently poorly understood. This study documents the sedimentary Sb deposition fluxes in Hongfeng lake (HFL), in southwestern China during 1958–2021 and quantifies the changes of anthropogenic contributions to sediments using Sb stable isotopes. Mean Sb concentration (mean: 1.89 mg kg−1) and deposition flux (mean: 302.1 ng cm−2 a−1) in lake sediments remained relatively stable from 1958 to 1980. Sb deposition fluxes increased rapidly since 1980, peaked at 990.8 ng cm−2 a−1 in 2000, and then decreased consistently, reaching 306.9 ng cm−2 a−1 in 2021. Generally, the historical changes in Sb isotopes were anticorrelated with Sb deposition fluxes and enrichment factors, suggesting a lower ε123Sb signature in anthropogenic loading sources, and highlight the ability of Sb isotopes to distinguish anthropogenic signatures from natural processes in complex hydrological systems. Using a binary end-member mixing model, the contributions of anthropogenic sources to the accumulated of Sb in the lake sediments were estimated to be 20 % before 1980s and increased approximate 58 % during 2000–2015, then decreased to 24 % in 2021, likely reflecting the changes of degree in regional industrial activities. Our results help to better understand the response of Sb pollutions to anthropogenic activities and would in turn benefit the controls Sb contamination in lake ecosystems.

Morfológiai vizsgálatok Magyarország délnyugati határfolyóin = Morphological Studies on South-Western Border Rivers in Hungary

Nowadays, the preservation and sustainable use of our natural values are increasingly coming to the fore, and this has implications not only for economic and field development but also for ecological aspects. In recent years, attention has shifted towards river morphological studies, which were previously relegated to the background. Understanding long-term changes and assessing the current state is essential to estimate future processes. In this article, we present our morphological studies on the Hungarian–Croatian border sections of the Mura and the Drava rivers. Historical changes were analyzed through a comparative study of historical maps from earlier periods, while the evaluation of the current state was conducted based on a detailed terrain model from a recent survey. GIS evaluation was also compared with sediment transport and flow measurement results. This comparison suggests that the morphological status of the river section under study is consistent with the typical parameters of transport processes.

Historical change in associations between perceived risk, disapproval, and use of cannabis among young adults ages 19–30, 2011–2022

BackgroundThe current study used U.S. young adult data to examine overall and age group-specific historical trends in (a) mean perceived risk and disapproval of cannabis use, and (b) risk/use and disapproval/use associations. MethodsData were collected from 2011 to 2022 from 16,492 respondents aged 19–30 in the national Monitoring the Future panel study. Trends in mean risk and disapproval overall and by age group (19–22, 23–26, 27–30) were modeled. Models regressing any past 30-day cannabis use on risk and disapproval controlled for sex, race/ethnicity, college education, population density, state cannabis policy, region, and year. Age group differences and historical trends in regression estimates from year-specific models were examined. ResultsFrom 2011 to 2022, overall mean perceived risk decreased from 3.08 (just over moderate) to 2.50 (between slight and moderate); mean disapproval decreased from 2.21 (between disapprove and strongly disapprove) to 1.66 (between don’t disapprove and disapprove). Higher risk and disapproval were independently associated with lower odds of past 30-day cannabis use overall (AORs 0.86 and 0.76, respectively); controlling for sociodemographics and state policy had virtually no impact on association strength. There were no significant age-related association differences. The risk/use association weakened from AOR 0.84 in 2011 to AOR 0.91 in 2022; the disapproval/use association remained stable (AORs 0.753 and 0.749). ConclusionsYoung adults now perceive cannabis as less risky and are less disapproving of using than they were a decade ago. Perceived risk has weakened as a cannabis use risk factor over time; disapproval has remained a stable risk factor.

The genetic consequences of historic climate change on the contemporary population structure of a widespread temperate North American songbird

Studies of widely distributed species can inform our understanding of how past demographic events tied to historic glaciation and ongoing population genetic processes interact to shape contemporaneous patterns of biodiversity at a continental scale. In this study, we used whole-genome resequencing to investigate the current population structure and genetic signatures of past demographic events in the widespread migratory American goldfinch (Spinus tristis). Phylogenetic relationships inferred from whole mitochondrial genomes were poorly resolved. In contrast, a genome-wide panel of > 4.5 million single nucleotide polymorphisms (SNPs) strongly supported the existence of eastern and western populations separated by western mountain ranges and additional population structuring within the western clade. Demographic modeling estimated that the eastern and western populations diverged approximately one million years ago, and both populations experienced subsequent population bottlenecks during the last glacial period. Species distribution models showed a severe contraction of suitable habitat for the American goldfinch during this period, with predicted discontinuities that are consistent with multiple, isolated glacial refugia that coincide with present-day population structure. Low overall genetic differentiation between the eastern and western populations (FST ∼ 0.01) suggests ongoing gene flow accompanied divergence, and individuals with admixed genomic signatures were sampled along a potential contact zone. Nevertheless, outlier SNPs were identified near genes associated with feather color, song, and migratory behavior and provide strong candidates for further study of the mechanisms underlying reproductive isolation and speciation in birds.

Reconstructing the past environmental conditions of southwestern India using estuarine sediment core

Geological archives can be examined via multiple proxies to uncover significant information about historical environmental changes. In comparison to single proxy approach, the use of multiple proxies can provide better resolution of the paleoenvironmental record. Thus, in the present study, to understand the paleoenvironmental conditions in the Kali coast in southwestern India, sedimentological, geochemical and isotopic (210Pb, 137Cs) proxies were used. The findings demonstrated that, in previous decades, the sedimentation rate varied from 0.5 to 1.0 cm/year under conditions with relatively higher hydrodynamic energy that were more common and fluctuating, allowing for larger sand particle deposition. However, in more recent years, finer particle deposition towards the surface has been observed under conditions with lower and more stable hydrodynamic energy, with a sedimentation rate of 1.87 cm/year. Additionally, the finer fractions displayed a strong correlation with the metal distribution, which was mostly governed by FeMn oxides. Furthermore, it can be revealed that the environment was warm, humid, and marine-like between 1995 and 2000 based on chemical weathering intensity values and Rb/K ratios. A subtle shift to a freshwater habitat with relatively less warm, less humid climate occurred between 2000 and 2020. Therefore, similar research with longer depositional histories coupled with multiple proxies can help predict the future climatic shifts in decadal time scales.