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Spatiotemporal dynamics of ecological quality on the Qinghai-Tibet Plateau: Drivers, trends, and implications for sustainable development 青藏高原生态质量时空动态:可持续发展的驱动力、趋势与启示
IF 3.3 2区 地球科学
Anthropocene Pub Date : 2025-04-19 DOI: 10.1016/j.ancene.2025.100476
Tianjie Tong , Daojun Zhong , Zhenhan Tu
{"title":"Spatiotemporal dynamics of ecological quality on the Qinghai-Tibet Plateau: Drivers, trends, and implications for sustainable development","authors":"Tianjie Tong ,&nbsp;Daojun Zhong ,&nbsp;Zhenhan Tu","doi":"10.1016/j.ancene.2025.100476","DOIUrl":"10.1016/j.ancene.2025.100476","url":null,"abstract":"<div><div>The Qinghai-Tibet Plateau (QTP) is a vital ecological frontier undergoing significant environmental changes due to climate change and escalating human activity. This study examines the spatiotemporal trends of ecological quality across the QTP from 2000 to 2020 utilizing an integrated analytical framework that combines the Remote Sensing-based Ecological Index (RSEI), Sen-Mann-Kendall trend analysis, and decision tree classification. Our data indicate that 17.32 % of the plateau saw substantial ecological enhancement during the research period, especially in the eastern and northern parts. In contrast, only 2.70 % exhibited degradation, primarily in the southern portions. The temporal study revealed a transition towards ecological stabilization throughout the 2010–2020 timeframe in contrast to the more erratic 2000–2010 decade. Attribution study revealed that human activities were the primary catalyst of ecological change, influencing 8.42 % of the area, with predominantly positive effects observed in 82.86 % of human-affected regions, defying traditional beliefs regarding anthropogenic consequences in high-altitude ecosystems. Climate elements demonstrated intricate influences, with precipitation often improving ecological quality, whereas temperature effects transitioned from largely detrimental to more balanced over time. Examining land cover transitions revealed that grassland restoration is especially advantageous for ecological enhancement, with the conversion from bare land to grassland being the most substantial positive change. Our findings underscore the efficacy of ecological restoration initiatives while elucidating the regionally distinct relationships between climatic and anthropogenic factors. These findings highlight the necessity for geographically customized conservation programs that tackle particular regional issues and leverage proven restoration achievements. This research enhances our comprehension of biological dynamics in high-altitude habitats and establishes a scientific basis for the sustainable management of the QTP, a region of global ecological importance.</div></div>","PeriodicalId":56021,"journal":{"name":"Anthropocene","volume":"50 ","pages":"Article 100476"},"PeriodicalIF":3.3,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Past and future climate change in the Zagros region of western Iran 伊朗西部扎格罗斯地区过去和未来的气候变化
IF 3.3 2区 地球科学
Anthropocene Pub Date : 2025-04-11 DOI: 10.1016/j.ancene.2025.100475
Pedram Attarod , Haifeng Zhu , Samira Beiranvand , Thomas Grant Pypker , Vilma Bayramzadeh , Hamid Soofi Mariv , Kazhal Karimi
{"title":"Past and future climate change in the Zagros region of western Iran","authors":"Pedram Attarod ,&nbsp;Haifeng Zhu ,&nbsp;Samira Beiranvand ,&nbsp;Thomas Grant Pypker ,&nbsp;Vilma Bayramzadeh ,&nbsp;Hamid Soofi Mariv ,&nbsp;Kazhal Karimi","doi":"10.1016/j.ancene.2025.100475","DOIUrl":"10.1016/j.ancene.2025.100475","url":null,"abstract":"<div><div>The decline of Zagros forests of western Iran is assumed to be a consequence of climate change. The impact of climate change extends beyond the environment and has affected living standards, the economy, society, and the cultural development of people in the Zagros region. This study aimed to analyze trends in the meteorological data obtained from observations at 16 synoptic weather stations in the Zagros region between1988 and 2022 and assessed future climate change under shared socio-economic pathways (SSPs) scenarios. The Mann-Kendall (MK) test and Sen's slope estimator were applied to detect significant trends in meteorological datasets. Projected meteorological variables of the NorESM2-LM model under SSP1, SSP3, and SSP5 scenarios were downscaled from 2030 to 2060 for each station using a quantile mapping approach. From 1988–2022, annual air temperature (75 % of stations) and wind speed (56 % of stations) significantly increased (α=0.05), but there were no significant trends in precipitation for any of the stations. Since 1988, an increase was observed in both temperature (0.04 °C y<sup>−1</sup>) and wind speed (0.02 m s<sup>−1</sup> y<sup>−1</sup>). Compared to the historical period, the mean annual temperature is expected to increase under SSP1, SSP3, and SSP5 scenarios by 0.2°C, 0.4°C, and 1.2°C, respectively, between 2030 and 2060. However, our projections under all scenarios suggest a negligible increase in average annual precipitation in the Zagros region. The results of this research suggest that the Zagros region will be vulnerable to drought under all scenarios, leading to substantial impacts on water resources, Zagros forests, agriculture, and related socio-economic activities.</div></div>","PeriodicalId":56021,"journal":{"name":"Anthropocene","volume":"50 ","pages":"Article 100475"},"PeriodicalIF":3.3,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Highland transformation: Human impact in the Bukov Brook valley (Bohemian-Moravian Highlands) from Prehistory to the modern era 高地改造:人类对布科夫溪谷(波西米亚-摩拉维亚高地)从史前到现代的影响
IF 3.3 2区 地球科学
Anthropocene Pub Date : 2025-04-11 DOI: 10.1016/j.ancene.2025.100474
Jan Petřík , Libor Petr , Miroslav Dejmal , Michaela Prišťáková , Michal Vágner , Petr Kočár , Klára Šabatová , Marcin Frączek , Aleš Bajer , Katarína Adameková , Mojmír Hrádek
{"title":"Highland transformation: Human impact in the Bukov Brook valley (Bohemian-Moravian Highlands) from Prehistory to the modern era","authors":"Jan Petřík ,&nbsp;Libor Petr ,&nbsp;Miroslav Dejmal ,&nbsp;Michaela Prišťáková ,&nbsp;Michal Vágner ,&nbsp;Petr Kočár ,&nbsp;Klára Šabatová ,&nbsp;Marcin Frączek ,&nbsp;Aleš Bajer ,&nbsp;Katarína Adameková ,&nbsp;Mojmír Hrádek","doi":"10.1016/j.ancene.2025.100474","DOIUrl":"10.1016/j.ancene.2025.100474","url":null,"abstract":"<div><div>The history of human activities in the Central European mid-mountains differs significantly from the intensively inhabited lowlands. The Bohemian-Moravian Highlands are believed to have been settled during the onset of metal mining in the 13th century AD. Our evidence from the floodplain deposits of Bukov Brook demonstrates deforestation and sporadic human settlement activities during the prehistoric era, already occurring as early as the Bronze Age, as evidenced by pottery, charcoal and Lens culinaris cf. in the alluvial fan sediments. In this period, the landscape was covered by Abies and Fagus. Since the 10th–12th centuries AD, an agricultural landscape with mild deforestation has been inferred from buried floodplain sediments, despite limited archaeological evidence of settlement. Significant geomorphological changes were observed in the 11th–13th centuries AD, driven by prospecting, mining activities, pond construction, and intensive deforestation, accompanied by the limited presence of cultivated grain. Between the 13th and 16th centuries AD, mining activities ceased, anthropogenic influence increased, and the deforested landscape became more conducive to agriculture, grain cultivation, and grazing. From the 16th century AD onwards, erosion from fine washouts of fields and pastures became prevalent, and the once-functional pond vanished. This comprehensive picture underscores the role of smaller catchments in mid-mountain regions like the Bohemian-Moravian Highlands highlighting their significance in the research of landscape transformation, resource exploitation, and land-use practices. It also sets the stage for further exploration into the evolving dynamics of human-environment interactions across various historical periods.</div></div>","PeriodicalId":56021,"journal":{"name":"Anthropocene","volume":"50 ","pages":"Article 100474"},"PeriodicalIF":3.3,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143870671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced hydrological disturbance and atmospheric pollution on an ombrotrophic peatland (Greater Khingan Mountains, Northeast China) since 1950s inferred from diatom records 基于硅藻记录的50年代以来大兴安岭近营养型泥炭地水文扰动和大气污染加剧
IF 3.3 2区 地球科学
Anthropocene Pub Date : 2025-04-10 DOI: 10.1016/j.ancene.2025.100473
Dongxue Han , Yang Sun , Jinxin Cong , Guoping Wang , Chuanyu Gao
{"title":"Enhanced hydrological disturbance and atmospheric pollution on an ombrotrophic peatland (Greater Khingan Mountains, Northeast China) since 1950s inferred from diatom records","authors":"Dongxue Han ,&nbsp;Yang Sun ,&nbsp;Jinxin Cong ,&nbsp;Guoping Wang ,&nbsp;Chuanyu Gao","doi":"10.1016/j.ancene.2025.100473","DOIUrl":"10.1016/j.ancene.2025.100473","url":null,"abstract":"<div><div>Anthropogenic source emissions have caused unprecedented atmospheric environment pollution and natural ecosystem destruction in recent decades. It is necessary to explore the relationships among human, environment and ecosystem in a global change context. Ombrotrophic peatlands are precipitation-dependent and derive nutrients solely from atmospheric deposition, which can document environmental changes continuously. Diatoms preserved in peat sediments are abundant and diverse, and sensitive to hydrological environment changes. Here we reconstructed the historical water table conditions based on diatom from an ombrotrophic peatland in the northern Greater Khingan Mountains, and to assess the influence of climate and human on ecosystem development over the past 150 years. Our results revealed the hydrological condition in Hongtu (HT) peatland was mainly impacted by climate before 1950 AD. HT peatland remained in a pristine state with minimal human interference, as native inhabitants continued to hunt and gather. After the New China was established in 1949 AD, high frequency of fire events caused by rapid population growth, mining and industry destroyed the diatom diversity. Higher water table in HT peatland from 1950 AD to 1965 AD was resulted by higher rainfall. Since 1980 AD, especially after 2000 AD, a suddenly increase of tolerant diatoms species (<em>Achnanthidium minutissimum</em> and <em>Craticula molestiformis</em>) indicated enhanced anthropogenic disturbance. Anthropogenic emissions caused by industrial production and coal consumption increased the atmospheric nitrogen deposition. The abnormal drought of HT peatland was influenced by both climate warming and human activities since 1980s. The recent and strong effects of human activities on peatlands left significantly stratigraphic signals of the Anthropocene in peat deposits. Diatoms have potential to be applied as indicators of long-term hydrological changes in ombrotrophic peatlands, as they are highly sensitive to environmental changes and human disturbance.</div></div>","PeriodicalId":56021,"journal":{"name":"Anthropocene","volume":"50 ","pages":"Article 100473"},"PeriodicalIF":3.3,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tracking the warning signal of extreme rainstorm and flood events in Haihe River Basin through historical documents 通过历史文献追踪海河流域极端暴雨洪水事件预警信号
IF 3.3 2区 地球科学
Anthropocene Pub Date : 2025-04-02 DOI: 10.1016/j.ancene.2025.100471
Jinxin Lyu , Zhixin Hao , Maowei Wu , Quansheng Ge
{"title":"Tracking the warning signal of extreme rainstorm and flood events in Haihe River Basin through historical documents","authors":"Jinxin Lyu ,&nbsp;Zhixin Hao ,&nbsp;Maowei Wu ,&nbsp;Quansheng Ge","doi":"10.1016/j.ancene.2025.100471","DOIUrl":"10.1016/j.ancene.2025.100471","url":null,"abstract":"<div><div>The available instrumental meteorological data spans less than a century, which is insufficient to robustly diagnose the mechanisms of extreme event occurrences. In this study, historical documents were used to identify extreme rainstorm-flood events in the Haihe River Basin (HRB) from 1736 to 1911, including their occurrence periods, affected areas, and rainfall characteristics. Moreover, early warning signals and climatic conditions associated with severe rainstorm-flood occurrences were disucssed. The findings indicate that, due to terrain uplift, the majority of severe floods in the HRB predominantly occurred in the piedmont plains of the Taihang Mountains. In particular, the landfall of long-distance typhoons along China’s southern coast, combined with the northward intensification of the western Pacific subtropical high, served as preconditions for these flood events. Accompanied by a significant increase in easterly and southeasterly winds, water vapor from the western Pacific Ocean and the South China Sea entered the North China Plain through double jet streams from the southeast and southwest. The majority of these floods occurred during La Niña years. Typhoon landfall, the strengthening of the northward movement of the western Pacific subtropical high, and La Niña events serve as key early warning signals for extreme rainfall and flooding, which are essential for disaster prevention and mitigation in the HRB.</div></div>","PeriodicalId":56021,"journal":{"name":"Anthropocene","volume":"50 ","pages":"Article 100471"},"PeriodicalIF":3.3,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spatiotemporal variability of fluvial carbon components under different land use types in a mountainous karst region, Southwest China 西南山地喀斯特地区不同土地利用类型下河流碳组分的时空变异
IF 3.3 2区 地球科学
Anthropocene Pub Date : 2025-04-02 DOI: 10.1016/j.ancene.2025.100472
Jiaxu Han, Si-Liang Li, Jun Zhong, Sen Xu
{"title":"Spatiotemporal variability of fluvial carbon components under different land use types in a mountainous karst region, Southwest China","authors":"Jiaxu Han,&nbsp;Si-Liang Li,&nbsp;Jun Zhong,&nbsp;Sen Xu","doi":"10.1016/j.ancene.2025.100472","DOIUrl":"10.1016/j.ancene.2025.100472","url":null,"abstract":"<div><div>Rivers export inorganic and organic carbon derived from various landscapes. Land use thus can significantly impact the spatiotemporal variations in river carbon species. However, the impact of land use, especially agricultural land, on riverine carbon species and dissolved organic matter (DOM) compositions in carbonate areas remains poorly explored. In this study, we collected water samples from a typical karst river in Southwest China, and analyzed the dissolved organic and inorganic (DOC and DIC) and particulate organic carbon (POC) concentrations, δ<sup>13</sup>C<sub>DIC</sub>, and DOM compositions. The DIC concentration and δ<sup>13</sup>C<sub>DIC</sub> value ranged from 7.9 to 41.4 mg L<sup>–1</sup> and −11.2 to −7.4 ‰ in the wet season, and from 7.4 to 48.7 mg L<sup>–1</sup> and −9.5 to −5.7 ‰ in the dry season, respectively. During the wet season, the tributaries from the catchments with high proportions of forest coverage have relatively low DIC concentrations, and negative δ<sup>13</sup>C<sub>DIC</sub> values, indicating the larger contribution of soil CO<sub>2</sub>. The forest-dominated group exhibited the highest proportions of humic-like C1 (21.1 ± 0.7 %). The cropland-dominated group displayed the highest proportions of protein-like C3 (44.6 ± 7.6 %), indicating the organic matter inputs from terrestrial and anthropogenic sources. The POC% and C/N ratio ranged from 0.1 % to 0.8 % and 1–16.6 in the wet season, respectively. The proportion of cropland is positively correlated with POC and C/N, indicating the loss of soil rich in organic matter in farmland. These results further highlighted that land use and biological processes have an important impact on carbon transportation in the karst rivers. Therefore, considering alterations in carbon component dynamics resulting from climate and land use changes is crucial for river ecosystem assessments and sustainable development.</div></div>","PeriodicalId":56021,"journal":{"name":"Anthropocene","volume":"50 ","pages":"Article 100472"},"PeriodicalIF":3.3,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The impact of ocean acidification on gastropod shell dissolution and microstructure 海洋酸化对腹足类动物壳溶解和微观结构的影响
IF 3.3 2区 地球科学
Anthropocene Pub Date : 2025-03-27 DOI: 10.1016/j.ancene.2025.100470
Xing Li , Haijun Song , Li Tian , Xiangmin Chen , Xin Sun , Jia Yan , Enhao Jia , Yan Feng , Daoliang Chu
{"title":"The impact of ocean acidification on gastropod shell dissolution and microstructure","authors":"Xing Li ,&nbsp;Haijun Song ,&nbsp;Li Tian ,&nbsp;Xiangmin Chen ,&nbsp;Xin Sun ,&nbsp;Jia Yan ,&nbsp;Enhao Jia ,&nbsp;Yan Feng ,&nbsp;Daoliang Chu","doi":"10.1016/j.ancene.2025.100470","DOIUrl":"10.1016/j.ancene.2025.100470","url":null,"abstract":"<div><div>Global seawater pH is projected to decrease by 0.3–0.5 units on average by the end of this century, which is considered detrimental to the shells of marine calcareous organisms. However, there is limited understanding of how ocean acidification affects the morphology and structure of these shells, as well as the underlying mechanisms. This study examines the shell growth, surface erosion, and microstructural changes of the marine gastropod <em>Lunella coronata granulata</em> after 85 days of exposure to varying pH (8.1–7.1). The results reveal that at pH ≤ 7.5, shell growth is notably inhibited, with pronounced dissolution hole formation on the inner surface. At pH 7.1, shell surface erosion becomes more pronounced, accompanied by extensive peeling of the shell periostracum. These changes—dissolution hole formation and periostracum peeling—are critical indicators of gastropod shell response to ocean acidification and can serve as biological indicators reflecting current and past ocean acidification. Additionally, our study shows a clear negative correlation between shell dissolution and pH, providing new bio-proxy for indicating the pH changes.</div></div>","PeriodicalId":56021,"journal":{"name":"Anthropocene","volume":"50 ","pages":"Article 100470"},"PeriodicalIF":3.3,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exploring the role of a Mediterranean transhumance drove road as shelter for amphibian breeding 探索地中海迁徙道路作为两栖动物繁殖庇护所的作用
IF 3.3 2区 地球科学
Anthropocene Pub Date : 2025-03-13 DOI: 10.1016/j.ancene.2025.100469
Christian Arnanz , Paloma Alcorlo , Pablo Amador , Francisco M. Azcárate , Diego Llusia , Violeta Hevia
{"title":"Exploring the role of a Mediterranean transhumance drove road as shelter for amphibian breeding","authors":"Christian Arnanz ,&nbsp;Paloma Alcorlo ,&nbsp;Pablo Amador ,&nbsp;Francisco M. Azcárate ,&nbsp;Diego Llusia ,&nbsp;Violeta Hevia","doi":"10.1016/j.ancene.2025.100469","DOIUrl":"10.1016/j.ancene.2025.100469","url":null,"abstract":"<div><div>Amphibians face global population declines due to environmental degradation and habitat loss, particularly impacting breeding water bodies. Thus, we hypothesise that water bodies associated with traditional pastoralist practices, such as those along drove roads used for transhumance (<em>e.g.</em> ponds and troughs), may play a crucial role in supporting amphibian assemblages. Conducted in one of the main drove roads still in use in Spain (the Conquense Drove Road, hereafter CDR), this study evaluated the conservation condition and contribution of the CDR water bodies to amphibian breeding assemblages at a landscape scale. We also explored the influence of landscape (land use cover) and local (water body characteristics) variables on the occurrence of breeding amphibians within and outside the CDR. Results confirm that the CDR provides a significantly higher proportion of functional water bodies to the landscape compared to its surroundings, providing highly valuable refuges for amphibians against threats caused by land use intensification. This key function of the CDR in the maintenance of amphibian breeding points persists despite the observed lack of continuity of water bodies along its route. Ponds and the most naturalized troughs (the minority of them) were identified as the most suitable habitats, supporting species such as <em>Discoglossus galganoi</em>, <em>Pleurodeles waltl</em>, <em>Epidalea calamita</em>, <em>Hyla molleri</em>, <em>Pelobates cultripes</em>, <em>Pelodytes punctatus</em>, and <em>Pelophylax perezi.</em> Only the latter two were found in troughs. While pond creation and restoration should be prioritized due to their higher suitability for amphibians, we demonstrated that troughs still serve as complementary habitats and refuges if properly managed. We recommend ensuring a minimum hydroperiod, promoting the development of sediment and macrophytes, and implementing access ramps for terrestrial wildlife.</div></div>","PeriodicalId":56021,"journal":{"name":"Anthropocene","volume":"50 ","pages":"Article 100469"},"PeriodicalIF":3.3,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sediment magnetic records of human activities in Lake Chaohu Basin over the past 166 years 巢湖流域166年来人类活动的沉积物磁记录
IF 3.3 2区 地球科学
Anthropocene Pub Date : 2025-02-21 DOI: 10.1016/j.ancene.2025.100468
Wenshan Yang , Huan Fu , Yongdong Zhang , Tingping Ouyang
{"title":"Sediment magnetic records of human activities in Lake Chaohu Basin over the past 166 years","authors":"Wenshan Yang ,&nbsp;Huan Fu ,&nbsp;Yongdong Zhang ,&nbsp;Tingping Ouyang","doi":"10.1016/j.ancene.2025.100468","DOIUrl":"10.1016/j.ancene.2025.100468","url":null,"abstract":"<div><div>Variations of sediment magnetism characteristics in lake systems are generally attributed to human activities in the respective catchments; however, the relationships between sediment magnetism proxies and the types or intensities of human activities are generally poorly established, which restricts the use of magnetism proxies in paleoenvironmental reconstructions. Here, magnetic parameters were measured in a dated sediment core from Lake Chaohu, Anhui Province, China, to explore whether and to what extent environmental magnetism proxies indicate the complex human activities in the lake basin over the past 166 years. Results demonstrate that detrital magnetite minerals were the major magnetite fraction in the sediments. The lowest values of magnetic concentration proxies (χ<sub>lf</sub>, χ<sub>ARM</sub>, and SIRM) in sediments prior to approximately 1950 indicate minimal input of detrital magnetic minerals, implying limited disturbance of the catchment, which coincided with weak human activities in the lake basin in this period—mainly primitive agriculture. In sediments deposited during ca. 1950–1985, increased χ<sub>lf</sub> and reduced grain size-dependent proxies (χ<sub>fd</sub>%, SIRM/χ<sub>lf</sub>, and χ<sub>ARM</sub>/χ<sub>lf</sub>) indicate increased input of detrital magnetic minerals and coarsening of the magnetic grains. This shift might have resulted from the rapid development of agricultural and industrial activities in the lake catchment since the 1950s and decreased hydrodynamic force within the lake due to dam construction in the 1960s. After ca. 1985, χ<sub>lf</sub>, χ<sub>ARM</sub>, and SIRM gradually decrease to the pre-1950 levels, indicating further decrease of the magnetic mineral input. This is likely due to decreased agricultural activities as a consequence of urbanization expansion and a shift from high pollution factories to high-tech industry. Overall, the trajectories of magnetic proxies in the sediment core reflect historical variations of the types and intensities of human activities in the lake basin. This study constitutes an important basis for the use of environmental magnetic proxies in paleoenvironmental reconstructions.</div></div>","PeriodicalId":56021,"journal":{"name":"Anthropocene","volume":"49 ","pages":"Article 100468"},"PeriodicalIF":3.3,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Vulnerability assessment of rural households to climate change using livelihood vulnerability framework approach in the trans-Himalayan region of Ladakh, India 利用生计脆弱性框架方法评估印度拉达克跨喜马拉雅地区农户对气候变化的脆弱性
IF 3.3 2区 地球科学
Anthropocene Pub Date : 2025-02-21 DOI: 10.1016/j.ancene.2025.100467
Padma Namgyal , Shyamal Sarkar , Ramesh Kumar
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