Quaternary Science Reviews最新文献_第2页

Seabird-mediated changes in sedimentary sterols and stanols 海鸟介导的沉积固醇和固醇的变化

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2026-01-03 DOI: 10.1016/j.quascirev.2025.109784

Matthew P. Duda , David C. Eickmeyer , John P. Smol , Jules M. Blais

Effective conservation strategies for at-risk animal species greatly benefit from long-term trend data. Yet, most populations lack continuous monitoring beyond 30 years, with many often lacking monitoring altogether. Paleolimnology provides a retrospective method for reconstructing animal populations over thousands of years. Here we critically evaluated the efficacy of sterols and stanols as a supporting proxy to reconstruct seabird colony dynamics of a well-studied colony with distinct peaks in population size over ∼1700 years on Baccalieu Island, Newfoundland and Labrador (Canada). We analyzed sediment from a waterbody adjacent to the world's largest colony of Leach's Storm-Petrel (Hydrobates leucorhous), a nearby reference pond with no colonial seabird influences, and storm-petrel feces to determine the pathway of introduction of sterols and stanols to sediment to better understand their preservation and potential transformation over time. Cholesterol represented over 95 % of sterols/stanols in storm-petrel feces, reflecting the piscivorous and planktivorous invertebrate diet of the bird. In sediment, cholesterol increased over the last ∼200 years, coinciding with the increase in seabird colony size, but did not track the population decline ca. 1980 CE. The diagenetic products of cholesterol, such as cholestanol, 5α-cholestanone, and epi-coprostanol, however, closely tracked both increases and decreases in two known peaks in seabird population size (ca. 500 CE and ca. 1980 CE). Other sterols, such as campesterol, desmosterol, fucosterol, β-sitosterol, and 5α-stigmastanol, may track the indirect environmental impacts of the seabird colony, such as nest formation and fecal-derived nutrient enrichment of the terrestrial environment. Our findings support the use of sterols and stanols as effective and informative proxies for reconstructing long-term animal populations, especially when considered in a multi-proxy framework.

长期趋势数据对濒危动物物种的有效保护策略大有裨益。然而，大多数人口缺乏超过30年的持续监测，许多人往往完全没有监测。古湖泊学为重建数千年来的动物种群提供了一种回溯方法。在这里，我们批判性地评估了甾醇和甾醇作为辅助代理的功效，以重建在纽芬兰和拉布拉多（加拿大）的Baccalieu岛上一个经过充分研究的群体的种群动态，该群体的种群规模在1700年之间达到了不同的峰值。我们分析了世界上最大的Leach风暴海燕（Hydrobates leucorhous）群落附近的水体沉积物，附近一个没有种群海鸟影响的参考池塘，以及风暴海燕的粪便，以确定甾醇和甾醇引入沉积物的途径，以更好地了解它们的保存和潜在的变化。在风暴海燕的粪便中，胆固醇占甾醇/甾醇的95%以上，反映了这种鸟的鱼食性和浮游食性无脊椎动物饮食。在沉积物中，胆固醇在过去的200年里增加，与海鸟种群大小的增加相一致，但没有追踪到1980年左右的种群下降。然而，胆固醇的成岩产物，如胆固醇、5α-胆甾酮和外前列腺醇，在海鸟种群规模的两个已知峰值（约500 CE和约1980 CE）中都有密切的增减。其他甾醇，如油菜甾醇、去氨甾醇、聚珠甾醇、β-谷甾醇和5α-豆甾醇，可以追踪海鸟群落的间接环境影响，如筑巢和粪便来源的陆地环境营养物质富集。我们的研究结果支持使用甾醇和甾醇作为重建长期动物种群的有效和信息代理，特别是在多代理框架中考虑时。

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引用次数: 0

A tale of two regions: Cyclical human-climate interactions in the South Levant from the Chalcolithic to the Iron Age (6500–2200 BP) 两个地区的故事：从铜石器时代到铁器时代（6500-2200 BP）南黎凡特人类与气候的周期性相互作用

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2026-01-02 DOI: 10.1016/j.quascirev.2025.109777

Andrea Titolo, Alessio Palmisano

This paper investigates long-term trends in human population and their relationship with climate in two sub-regions of the South Levant (here labelled Samaria and Judah) from the Chalcolithic to the end of Iron Age III (6500-2200 cal yr BP). We aim to reconstruct demographic fluctuations and the sub-regional level, evaluate possible cycles of climate-population relations, to understand if different scales of analyses can reveal more nuanced population variations than what is already known for the whole South Levant, and to tackle a current debate on the Iron Age II dynamics in the region. To do so, we employ a multi-proxy approach with a carefully crafted dataset composed of radiocarbon dates, archaeological sites from published surveys and excavations, and well-known paleoclimate proxies (n = 4), which were analysed through a suite of mature statistical and quantitative techniques. More specifically, we employed probabilistic approaches, entailing SPDs generation, Aoristic techniques, Monte Carlo simulations, and moving-window techniques to answer questions of long-term population changes and their relation to climate. Our results show that a multi-scalar approach can reveal interesting patterns that add significant details to regional reconstructions, with the two regions following similar patterns but each dependent on the geographical, socio-political, and economic context of the area in each period. We highlighted cycles of climate-population nexus, evidence of societal resilience and population overshoot, and larger climatic impact on population in desert fringe areas, although maintaining that climate alone cannot be taken as the sole explanatory factor for population fluctuations. We also provided a more nuanced interpretation of the Iron Age II dynamics beyond the simple juxtaposition of desolation and prosperity related to the Assyrian domination, which can now be evaluated without the risk of misinterpretations due to the partial use of just archaeological excavation data.

本文研究了从铜石器时代到铁器时代III（距今6500-2200 cal yr BP）末期，南黎凡特两个次区域（这里称为撒玛利亚和犹大）人口的长期趋势及其与气候的关系。我们的目标是重建人口波动和次区域水平，评估气候-人口关系的可能周期，了解不同规模的分析是否可以揭示比整个南黎凡特已知的更细微的人口变化，并解决当前关于该地区铁器时代II动态的辩论。为此，我们采用了一种多代理方法，使用精心制作的数据集，该数据集由放射性碳测年、公布的调查和发掘的考古遗址以及知名的古气候代理（n = 4）组成，并通过一套成熟的统计和定量技术对其进行了分析。更具体地说，我们采用了概率方法，包括spd生成、主动脉技术、蒙特卡罗模拟和移动窗口技术来回答长期人口变化及其与气候关系的问题。我们的研究结果表明，多标量方法可以揭示有趣的模式，为区域重建增加重要的细节，两个地区遵循相似的模式，但每个地区都依赖于每个时期该地区的地理、社会政治和经济背景。我们强调了气候-人口联系的周期、社会恢复力和人口超调的证据，以及沙漠边缘地区更大的气候对人口的影响，尽管坚持认为气候本身不能作为人口波动的唯一解释因素。我们还提供了铁器时代II动态的更细致的解释，而不仅仅是与亚述统治相关的荒凉和繁荣的简单并列，现在可以评估，而不会因为部分使用考古挖掘数据而产生误解的风险。

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引用次数: 0

Evolution of subantarctic ecosystems during the last ∼2800 years in Lago Mitta (∼55°S), Isla Navarino, Fuegian archipelago 纳瓦里诺岛Lago Mitta（~ 55°S）近2800年亚南极生态系统的演变

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2026-01-02 DOI: 10.1016/j.quascirev.2025.109774

L.A. Villacís , J. Videla , E.A. Sepúlveda-Zúñiga , R.P. Villa-Martínez , P. Jara-Arancio , P.I. Moreno

As the only landmass that extends continuously from 52°S to 56°S, the Tierra del Fuego archipelago (TDF) provides a unique opportunity to track the Southern Westerly Winds (SWW) at subantarctic latitudes. Currently, the lack of consensus on centennial-scale SWW evolution during the late Holocene introduces uncertainty in understanding the full range of SWW variability. Here we present bidecadally resolved pollen, macroscopic charcoal, and diatom records spanning the last ∼2800 years from Lago Mitta, a small closed-basin lake located south of the Beagle Channel (55°S). Our aim is to examine terrestrial and aquatic ecosystem dynamics at this site and relate them to SWW variability in TDF. Closed-canopy forests dominated throughout the record, with modest canopy openings between ∼2.5–2.3, ∼2–1.8, ∼1.5–1.3, ∼0.8–0.7, and <0.1 cal ka BP, generally coinciding with local fire episodes. The highly dynamic diatom record transitions from benthic- to planktic-dominated assemblages, marked by abrupt transitions among planktic species (i.e., Aulacoseira ambigua, Discostella pseudostelligera, Asterionella formosa). Increasingly wet and cool conditions drove a millennial-scale lake-level rise, overprinted by centennial-scale shifts in forest structure, local fires, and water-column reorganization. The past millennium was characterized by a rise in Asterionella formosa, a diatom indicator of moderate nutrient enrichment, reflecting enhanced runoff. We infer relatively weak SWW influence between ∼2.8 and 1.6 cal ka BP, followed by an intensification culminating between ∼0.6 and 0.1 cal ka BP. Lago Mitta provides a detailed perspective on SWW variability, consistent with other TDF records that show similar but less temporally resolved trends.

火地岛群岛（Tierra del Fuego archipelago， TDF）是唯一一个连续从南纬52°延伸到南纬56°的大陆，为在亚南极纬度追踪南西风（SWW）提供了独特的机会。目前，对全新世晚期百年尺度SWW演化缺乏共识，这给理解SWW的全范围变率带来了不确定性。在这里，我们展示了从Lago Mitta（一个位于Beagle Channel南部（55°S）的小型封闭盆地湖泊）跨越过去~ 2800年的双侧分解花粉、宏观木炭和硅藻记录。我们的目的是研究该地点的陆地和水生生态系统动态，并将它们与TDF的SWW变化联系起来。在整个记录中，封闭冠层森林占主导地位，冠层开口在~ 2.5-2.3、~ 2-1.8、~ 1.5-1.3、~ 0.8-0.7和<；0.1 cal ka BP之间，通常与当地火灾事件一致。高动态硅藻记录从底栖生物为主到浮游生物为主的组合转变，以浮游物种（如Aulacoseira ambigua， disstella pseudostelligera, Asterionella formosa）之间的突变为标志。越来越多的潮湿和凉爽的条件推动了千年尺度的湖泊水位上升，叠加了百年尺度的森林结构变化、当地火灾和水柱重组。过去一千年的特点是福尔摩沙星藻（Asterionella formosa）的增加，这是一种中等营养富集的硅藻指标，反映了径流的增加。我们推断在~ 2.8和1.6 cal ka BP之间SWW的影响相对较弱，随后在~ 0.6和0.1 cal ka BP之间加剧。Lago Mitta提供了SWW变异性的详细视角，与其他TDF记录一致，这些记录显示了类似但时间上不太确定的趋势。

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引用次数: 0

Relative sea-level changes and evidence for a Holocene low stand in southern Greenland 格陵兰岛南部相对海平面变化和全新世低潮的证据

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2026-01-01 DOI: 10.1016/j.quascirev.2025.109787

Gregor Luetzenburg , Nare Ngoepe , Wesley R. Farnsworth , Astrid Rosenberg , Elliot Lewis , Jakob Brodersen , Ole Bennike , Marie-Louise Siggaard-Andersen , Sarah Woodroffe , Glenn A. Milne , Kristian K. Kjeldsen , Nicolaj K. Larsen

We present new relative sea-level (RSL) data from southern Greenland, an area critical for understanding the Greenland Ice Sheet's (GrIS) sensitivity to climate change. Our RSL reconstruction from the inner Isortoq Fjord spans the last ∼10,000 years and is based on stratigraphic analyses, magnetic susceptibility, X-ray fluorescence core scanning, loss-on-ignition, macrofossil identification, and AMS radiocarbon dating of 10 sediment cores. Isolation and transgression sequences identified in lake and submerged basin sediments reveal a rapid RSL fall during the Early Holocene driven by crustal unloading in response to the retreat of the GrIS. During the Early Holocene, RSL dropped from the regional marine limit at ∼36 m above mean sea-level (MSL) to near present-day MSL by ∼9 cal. ka BP. A Middle Holocene low stand above 20 m below today's MSL at ∼6 cal. ka BP is followed by a gradual Late Holocene transgression, with sea level returning to present-day MSL sometime during the last millennium. Similar to records from Paamiut to the north and Qaqortoq and Nanortalik to the southeast, early isolation of low-lying basins in the Isortoq region reflects rapid isostatic rebound. In contrast, the Late Holocene transgression is more gradual and less well defined, likely reflecting a combination of local glacier and ice sheet advances and perhaps a broader isostatic signal from the retreat of the North American Ice Sheet Complex. Comparison with Huy3 model predictions shows that observed RSL changes in this region were of greater magnitude than simulated, highlighting the need for refined GIA modelling.

我们提出了来自格陵兰岛南部的新相对海平面（RSL）数据，该地区对于了解格陵兰冰盖（GrIS）对气候变化的敏感性至关重要。我们对内Isortoq峡湾的RSL重建跨越了过去~ 1万年，并基于地层分析、磁化率、x射线荧光岩心扫描、着火损失、大化石鉴定和AMS放射性碳定年的10个沉积物岩心。在湖泊和淹没盆地沉积物中发现的隔离和海侵序列表明，在响应GrIS后退的地壳卸荷作用下，早全新世RSL快速下降。在全新世早期，RSL从平均海平面以上~ 36 m的区域海洋极限下降到接近今天的平均海平面（MSL）约9 cal. ka BP。在约6 cal. ka BP的全新世中期，海平面低于今天的MSL高度20米以上，随后是一个逐渐的全新世晚期海侵，海平面在最后一千年的某个时候回到今天的MSL高度。与北部的Paamiut和东南部的Qaqortoq和Nanortalik的记录相似，Isortoq地区低洼盆地的早期隔离反映了快速的均衡反弹。相比之下，晚全新世海侵则更为缓慢，也不那么明确，可能反映了当地冰川和冰盖推进的结合，也可能反映了北美冰盖复合体退缩带来的更广泛的均衡信号。与Huy3模式预测结果的对比表明，该地区RSL的观测值变化幅度大于模拟值，因此需要对GIA模型进行精细化。

{"title":"Relative sea-level changes and evidence for a Holocene low stand in southern Greenland","authors":"Gregor Luetzenburg , Nare Ngoepe , Wesley R. Farnsworth , Astrid Rosenberg , Elliot Lewis , Jakob Brodersen , Ole Bennike , Marie-Louise Siggaard-Andersen , Sarah Woodroffe , Glenn A. Milne , Kristian K. Kjeldsen , Nicolaj K. Larsen","doi":"10.1016/j.quascirev.2025.109787","DOIUrl":"10.1016/j.quascirev.2025.109787","url":null,"abstract":"<div><div>We present new relative sea-level (RSL) data from southern Greenland, an area critical for understanding the Greenland Ice Sheet's (GrIS) sensitivity to climate change. Our RSL reconstruction from the inner Isortoq Fjord spans the last ∼10,000 years and is based on stratigraphic analyses, magnetic susceptibility, X-ray fluorescence core scanning, loss-on-ignition, macrofossil identification, and AMS radiocarbon dating of 10 sediment cores. Isolation and transgression sequences identified in lake and submerged basin sediments reveal a rapid RSL fall during the Early Holocene driven by crustal unloading in response to the retreat of the GrIS. During the Early Holocene, RSL dropped from the regional marine limit at ∼36 m above mean sea-level (MSL) to near present-day MSL by ∼9 cal. ka BP. A Middle Holocene low stand above 20 m below today's MSL at ∼6 cal. ka BP is followed by a gradual Late Holocene transgression, with sea level returning to present-day MSL sometime during the last millennium. Similar to records from Paamiut to the north and Qaqortoq and Nanortalik to the southeast, early isolation of low-lying basins in the Isortoq region reflects rapid isostatic rebound. In contrast, the Late Holocene transgression is more gradual and less well defined, likely reflecting a combination of local glacier and ice sheet advances and perhaps a broader isostatic signal from the retreat of the North American Ice Sheet Complex. Comparison with Huy3 model predictions shows that observed RSL changes in this region were of greater magnitude than simulated, highlighting the need for refined GIA modelling.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"374 ","pages":"Article 109787"},"PeriodicalIF":3.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145885203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Does increasing human impact across the holocene result in simplification of vegetation composition and diversity across Europe? A pollen-based spatio-temporal approach 人类对整个全新世的影响是否会导致整个欧洲植被组成和多样性的简化？基于花粉的时空研究方法

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2025-12-31 DOI: 10.1016/j.quascirev.2025.109776

Caterina Röhm , Maria Antonia Serge , Ralph Fyfe , François Gillet , Laurent Marquer , Agnès Lagnoux , Thierry Klein , Didier Galop , Florence Mazier

Land use and climate change are the primary drivers of current biodiversity loss, but have had different impacts on biodiversity across the Holocene epoch. To enhance our understanding of current changes in diversity and its impact on ecosystem functions, knowledge of long-term interactions between vegetation diversity, land use change, and climatic change is crucial. Grid-cell estimates of quantified regional vegetation cover (RV_est) based on pollen data from 1607 sites across Europe, transformed using the REVEALS (Regional Vegetation Estimates from Large Sites) model, have been used to explore spatiotemporal changes in vegetation and regional diversity during the Holocene (25 time windows covering the period from 11.7 ka cal BP to present). Space-time constrained clustering of the RVests identified six dominant vegetation types (VTs): Mediterranean vegetation, open vegetation, Abies-Fagus forest, broadleaved mixed forest, coniferous mixed forest, Betula woodland, whose spatial extent changes over the Holocene. The study explored REVEALS α-diversity (richness of taxa, richness of abundant taxa, and evenness) within each grid cell as well as spatial REVEALS β-diversity (spatial variations in composition within one time frame) and turnover (temporal variation in composition within one grid cell) within each vegetation type. Changes in location, size, taxa composition, and REVEALS diversity of the vegetation types characterised four phases during the Holocene. The first (pioneer: 11.7–9.2 ka cal BP) and second (summer-green forest: 9.2 ka to 5.2 ka cal BP) phases generally showed higher REVEALS β-diversity and lower REVEALS evenness. The third phase (mixed semi-natural forest: 5.2 ka to 1.7 ka cal BP) is characterised by expansion of open vegetation and reflects increased human impact on the environment caused by increasing use of land for agricultural production. The final phase (from 1.7 ka cal BP) saw rapid transformations: open vegetation not only expanded, but also shifted in composition, with major increases in cereals and other anthropogenic indicators. This signals a clear intensification of land-use impact over the last two millennia. Across central Europe, vegetation became increasingly homogenised, dominated by a few widespread species. As a result, both REVEALS evenness and spatial β-diversity plummeted—marking a profound loss of ecological complexity.

In short, human-driven landscape openness did not simply reshape the vegetation—it rewrote the rules of diversity across the continent.

土地利用和气候变化是当前生物多样性丧失的主要驱动因素，但在整个全新世对生物多样性的影响不同。为了提高我们对当前多样性变化及其对生态系统功能影响的认识，了解植被多样性、土地利用变化和气候变化之间的长期相互作用至关重要。基于欧洲1607个站点的花粉数据，利用reveal （regional vegetation estimates from Large sites）模型对量化区域植被覆盖（RVest）进行网格单元估算，探讨了全新世（从11.7 ka cal BP到现在的25个时间窗）植被和区域多样性的时空变化。时空约束聚类结果表明，地中海植被、开阔植被、冷杉- fagus林、阔叶混交林、针叶混交林、桦木林地等6种植被类型在全新世具有明显的空间变化特征。研究揭示了不同植被类型在每个网格单元内的揭示α-多样性（类群丰富度、丰富度和均匀度）和空间揭示β-多样性（一个时间框架内组成的空间变化）和周转（一个网格单元内组成的时间变化）。全新世四个时期植被类型的位置、大小、分类群组成和揭示多样性的变化特征。第一阶段（拓荒期：11.7 ~ 9.2 ka cal BP）和第二阶段（夏绿林期：9.2 ~ 5.2 ka cal BP）总体上显示出较高的reveal β多样性和较低的reveal均匀度。第三阶段（混合半天然林：5.2 ka至1.7 ka cal BP）的特点是开阔植被的扩大，反映了由于农业生产用地的增加而造成的人类对环境的影响增加。最后阶段（从1.7 ka cal BP开始）发生了快速转变：开放植被不仅扩大，而且在组成上也发生了变化，谷物和其他人为指标大幅增加。这表明在过去两千年中土地使用影响明显加剧。在整个中欧，植被变得越来越同质化，由一些广泛分布的物种主导。结果，揭示的均匀性和空间β-多样性都急剧下降，标志着生态复杂性的深刻损失。简而言之，人类驱动的景观开放不仅重塑了植被，还改写了整个大陆的多样性规则。

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引用次数: 0

Tree-ring δ18O reveals thaw-buffered warming in northernmost permafrost regions of China 树木年轮δ18O揭示了中国最北端多年冻土区的融化缓冲变暖

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2025-12-31 DOI: 10.1016/j.quascirev.2025.109791

Jiachuan Wang , Qiang Li , Yang Xu , Zichun Jia , Yifan Wu , Changfeng Sun , Yanchao Wang , Zhenchuan Niu , Meng Ren , Qiufang Cai , Xiangyu Duan , Wentai Liu , Yu Liu

Permafrost is widespread in the northernmost part of China where it constitutes a major global carbon reservoir and plays a critical role in the stability of this cold-region's ecosystems. Accelerating warming in recent decades has heightened ecological and hydrological vulnerabilities, emphasizing the need for a deeper understanding of climate variability and its governing mechanisms. In this study, we analyze tree-ring oxygen isotope (δ¹⁸O) records from two dominant tree species, sampled across multiple sites within the permafrost zone. Our results identify summer maximum temperature and relative humidity as the primary climatic factors influencing δ¹⁸O fractionation. The δ¹⁸O records demonstrate high sensitivity and temporal stability in response to growing-season climate variability, indicating strong potential for reconstructing past regional temperature and moisture conditions. The δ¹⁸O series reveals a predominantly cold and wet climate from the 1900s to the mid-1950s, followed by a pronounced shift toward warmer and drier conditions beginning in the late 1950s. Notably, the rate of warming in this region has been considerably lower than the Northern Hemisphere average, likely due to the latent heat buffering associated with permafrost thaw. Furthermore, variations in regional atmospheric moisture are primarily modulated by large-scale circulation systems, including the East Asian Summer Monsoon (EASM), El Niño–Southern Oscillation (ENSO), and North Atlantic Oscillation (NAO). Collectively, these findings advance our understanding of climate dynamics in permafrost-affected regions and provide valuable insights for predicting future climate change, enhancing ecosystem resilience, and informing the conservation of forests and permafrost in cold environments.

多年冻土带在中国最北端广泛分布，构成了全球主要的碳库，对这个寒冷地区生态系统的稳定起着至关重要的作用。近几十年来，气候变暖的加速加剧了生态和水文脆弱性，强调需要更深入地了解气候变率及其控制机制。在这项研究中，我们分析了两种优势树种的树木年轮氧同位素（δ18O）记录，这些树木在多年冻土带的多个地点取样。结果表明，夏季最高温度和相对湿度是影响δ18O分馏的主要气候因子。δ18O记录对生长季节气候变率的响应具有较高的敏感性和时间稳定性，显示了重建过去区域温度和湿度条件的强大潜力。δ18O序列显示从1900年代到1950年代中期主要是寒冷和潮湿的气候，随后从1950年代后期开始明显转向温暖和干燥的气候。值得注意的是，该地区的变暖速度远远低于北半球的平均水平，这可能是由于与永久冻土融化相关的潜热缓冲。此外，区域大气湿度的变化主要受东亚夏季风（EASM）、厄尔尼诺Niño-Southern涛动（ENSO）和北大西洋涛动（NAO）等大尺度环流系统的调节。总的来说，这些发现促进了我们对受永久冻土影响地区气候动态的理解，并为预测未来气候变化、增强生态系统恢复力以及为寒冷环境下森林和永久冻土的保护提供了有价值的见解。

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引用次数: 0

A comprehensive investigation of the diet and subsistence strategies of the Bronze Age population in the Northern Agro-pastoral ecotone of China 中国北部农牧交错带青铜时代人口饮食与生存策略的综合调查

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2025-12-31 DOI: 10.1016/j.quascirev.2025.109772

Xin Jia , Wei Wang , Hongwei Shi , Chuang Wang , Xujia Pan , Runqi Jiang , Yonggang Sun , Harry F. Lee , Yaowu Hu

The interaction between agricultural and pastoral cultures during the Bronze Age has attracted widespread attention. However, these exchanges remain unclear in the frontier zone where pastoral and farming cultures intersected, particularly within China's Northern Agro-Pastoral Ecotone. Here, systematic stable carbon and nitrogen isotope analyses were conducted on crops, animal bones, and human bones excavated from the Bronze Age Shuiquan site in the eastern ecotone. We also integrate published zooarchaeological, archaeobotanical, and stable-isotope data from three different sub-regions of this transition zone to explore the interaction between introduced livestock and local millet agriculture—specifically, the dietary contribution of introduced animals to humans and the influence of local millet farming on livestock management. Our results indicate that: (1) at the Bronze Age Shuiquan site, in the Eastern part of the ecotone, humans primarily consumed millet crops (52 % ± 5 %), including foxtail and common millet. Animal protein was derived mainly from domestic omnivores, especially pigs and probably dogs (34.6 % ± 4.8 %), whereas introduced herbivores such as sheep and cattle contributed much less (10.8 % ± 3.1 %). In addition to provisioning pigs and dogs with millet, local inhabitants also kept cattle and a small number of sheep, feeding them millet by-products such as straw or chaff. (2) Regional comparisons across three sectors of the ecotone—Liaoxi, Hetao, and the Western Loess Plateau—show that millet remained the staple dietary source. However, in Hetao and the Western Loess Plateau, introduced herbivores (cattle, sheep) surpassed local omnivores (pigs, dogs) as the primary source of animal protein. Moreover, the contribution of millet to the diets of cattle and sheep exhibited a clear east-to-west decline. (3) Diet and subsistence diversity across the three regions reflects variations in geographical environment, resource reserve, and population migration from various cultures. These findings illustrate the range of subsistence strategies adopted within the Northern Agro-Pastoral Ecotone during the Bronze Age, offering scientific evidence to advance our understanding of the interaction of agro-pastoral interactions in prehistoric Eurasia.

青铜器时代农业文化与田园文化的互动引起了广泛的关注。然而，在畜牧和农耕文化交汇的边疆地区，特别是在中国的北方农牧交带，这些交流仍然不清楚。本文对东部过渡带青铜器时代水泉遗址出土的农作物、动物骨骼和人骨进行了系统的稳定碳、氮同位素分析。我们还整合了来自该过渡带三个不同子区域的动物考古学、考古学和稳定同位素数据，探讨了引进牲畜与当地粟农业之间的相互作用，特别是引进动物对人类饮食的贡献以及当地粟农业对牲畜管理的影响。结果表明：(1)在过渡带东部的青铜时代水泉遗址，人类主要食用谷子作物（52%±5%），包括谷子和普通谷子。动物蛋白主要来自家养杂食动物，尤其是猪和狗（34.6%±4.8%），而引进的食草动物，如羊和牛的贡献要少得多（10.8%±3.1%）。除了给猪和狗提供谷子外，当地居民还饲养牛和少量羊，用谷子的副产品如稻草或谷壳喂养它们。(2)辽西、河套和黄土高原西部3个过渡带的区域比较表明，谷子仍然是主要的食物来源。而在河套和黄土高原西部，引进的食草动物（牛、羊）超过了本地杂食动物（猪、狗），成为动物蛋白质的主要来源。此外，谷子对牛羊食粮的贡献呈现出明显的自东向西递减的趋势。(3)三地饮食和生计多样性反映了地理环境、资源储备和不同文化人口迁移的差异。这些发现说明了青铜器时代北部农牧交带采用的生存策略范围，为我们加深对史前欧亚大陆农牧相互作用的理解提供了科学证据。

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引用次数: 0

Late Holocene climate variability and lake productivity change inferred from the remote alpine catchment of Lake Bright, New Zealand 从新西兰布赖特湖偏远高山集水区推断的晚全新世气候变率和湖泊生产力变化

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2025-12-30 DOI: 10.1016/j.quascirev.2025.109782

Julian Eschenroeder , Christopher M. Moy , Sebastian Naeher , Marcus J. Vandergoes , Oliver Rach , Dirk Sachse , Rik Tjallingii , Jamie D. Howarth , Adelaine Moody , Xun Li , Claire Shepherd , Elizabeth Kennedy , Lizette Reyes

Remote lacustrine environments in the Southern Hemisphere offer rare opportunities to study past climate variability, unaffected by significant human disturbances. Yet, high-resolution palaeoenvironmental reconstructions for the late Holocene remain rare, limiting the current understanding of ecological responses over the last ∼4000 years, to regional climate dynamics. This study investigates late Holocene climate variability and ecosystem responses inferred from sediment cores of oligotrophic Lake Bright located in central Fiordland, Aotearoa New Zealand.

We applied a multi-proxy approach, comprising lipid biomarker analysis (brGDGTs and leaf wax n-alkanes), X-ray fluorescence core scanning (XRF-CS), hyperspectral imaging (HSI), bulk sediment geochemical proxies (biogenic silica, TOC, TN, δ¹³C, δ¹⁵N) and compound-specific stable hydrogen (δD) isotope analysis to sediment cores and modern catchment soils, water, and vegetation samples.

Our results indicate that over the late Holocene, Lake Bright's productivity was tied to changes in hydroclimate, and in particular to surface runoff dynamics. In this record, phases of enhanced lake productivity correlate with more arid climate intervals, characterised by lower detrital input, independent of temperature fluctuations. In contrast, decreased lake productivity coincides with increased detrital influx, reflecting elevated runoff and enhanced catchment erosion into the lake.

We identify a climatic shift between 2500 and 1500 years ago, possibly marking a transition from a centennial-scale stable climate towards more pronounced hydroclimate seasonality and a stronger influence of the Southern Hemisphere Westerly Winds (SHWW) in the region.

Our findings demonstrate the local influence of regional atmospheric circulation, modulated by the El Niño Southern Oscillation (ENSO) and the Southern Annular Mode (SAM) and offers insights for predicting how alpine lake ecosystems might respond to future climate changes.

南半球偏远的湖泊环境为研究不受重大人类干扰影响的过去气候变率提供了难得的机会。然而，全新世晚期的高分辨率古环境重建仍然很少，这限制了目前对过去~ 4000年生态响应的理解，仅限于区域气候动力学。本文研究了新西兰奥特罗阿峡湾中部布赖特湖沉积物岩心的晚全新世气候变率和生态系统响应。我们采用了多代理方法，包括脂质生物标志物分析（brGDGTs和叶蜡正构烷烃）、x射线荧光岩心扫描（XRF-CS）、高光谱成像（HSI）、大量沉积物地球化学代理（生物成因二氧化硅、TOC、TN、δ13C、δ15N）和化合物特异性稳定氢（δD）同位素分析，以沉积物岩心和现代流域土壤、水和植被样品为研究对象。研究结果表明，在全新世晚期，布赖特湖的生产力与水文气候的变化有关，特别是与地表径流动力学有关。在这一记录中，湖泊生产力增强的阶段与更干旱的气候间隔相关，其特征是碎屑输入减少，与温度波动无关。相反，湖泊生产力下降与碎屑流入增加相一致，反映了径流增加和流域对湖泊的侵蚀加剧。我们确定了2500 - 1500年前的气候变化，可能标志着从百年尺度的稳定气候向更明显的水文气候季节性和南半球西风（SHWW）在该地区的更强影响的转变。我们的研究结果证明了受厄尔Niño南方涛动（ENSO）和南环模（SAM）调节的区域大气环流的局部影响，并为预测高山湖泊生态系统如何应对未来气候变化提供了见解。

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引用次数: 0

Spatiotemporal variations in anthropogenic soil erosion in the Tibetan-Yi corridor, as recorded in lake sediments, and their influence on organic carbon burial 藏彝走廊湖泊沉积物人为土壤侵蚀时空变化及其对有机碳埋藏的影响

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2025-12-29 DOI: 10.1016/j.quascirev.2025.109781

Lili Pan, Duo Wu, Peiyao Xu, Tao Wang, Shilong Guo, Jinghua Huang

Soil, through agriculture, ecosystem services, and carbon storage, is a fundamental resource for human wellbeing. However, soil resources are facing increasing threats due to agricultural intensification and urbanization. Lake sediments are a significant carbon storage, as well as providing valuable archives for reconstructing long-term changes in soil erosion. The Tibetan-Yi Corridor, with its unique topography and rich history of human activity, is well suited to studies of human-environment interactions. This study analyzes sediment cores from two alpine lakes (Shayema and Xiaoshayema) in western Sichuan, China. Using AMS ¹⁴C dating and multi-proxy analyses, we reconstructed the history of enhanced anthropogenic soil erosion and its drivers in the corridor since the Ming and Qing dynasties. We show that military agriculture and timber harvesting during the Ming dynasty caused intermittent erosion in Shayema Lake's catchment. During the Qing Dynasty, large-scale human immigration and the introduction of new crops led to sustained and severe erosion in both basins. However, afforestation policies since the 1960s reduced erosion by promoting vegetation recovery. Compared with other lacustrine records from the Tibetan-Yi Corridor, anthropogenic erosion began earlier in the low-latitude Dianchi and Erhai Lake basins. From the Qin to Yuan dynasties, erosion expanded into low-elevation irrigated flatland areas undergoing rice cultivation. Ming-Qing immigration and the introduction of crops adapted to mountain environments further extended erosion to high-elevation areas. Lake organic carbon burial rates (OCBR) closely tracked sediment accumulation rates (SAR), with both increasing sharply during periods of intense erosion. This study highlights the response of soil erosion and carbon sequestration to human activities, offering scientific insights for assessing future erosion risks and lake carbon sink potential under future climate and land-use changes.

通过农业、生态系统服务和碳储存，土壤是人类福祉的基本资源。然而，由于农业集约化和城市化，土壤资源面临着越来越大的威胁。湖泊沉积物是一个重要的碳储存，并为重建土壤侵蚀的长期变化提供了宝贵的档案。藏彝走廊以其独特的地形和丰富的人类活动历史，非常适合研究人与环境的相互作用。本文对川西两个高寒湖泊（沙叶马和小沙叶马）的沉积物岩心进行了分析。利用AMS 14C测年和多代理分析，重建了明清以来廊道地区人为土壤侵蚀加剧的历史及其驱动因素。研究表明，明代军事农业和木材采伐造成了沙叶玛湖流域的间歇性侵蚀。在清朝时期，大规模的人类移民和新作物的引进导致了两个流域持续而严重的侵蚀。但是，自1960年代以来的造林政策通过促进植被恢复减少了侵蚀。与藏彝走廊其他湖泊记录相比，低纬滇池和洱海盆地的人为侵蚀开始较早。从秦朝到元朝，侵蚀扩大到种植水稻的低海拔灌溉平原地区。明清移民和适应山地环境的作物的引进进一步扩大了高海拔地区的侵蚀。湖泊有机碳埋藏率（OCBR）与沉积物堆积率（SAR）密切相关，在强烈侵蚀期两者均急剧增加。本研究强调了土壤侵蚀和固碳对人类活动的响应，为评估未来气候和土地利用变化下的土壤侵蚀风险和湖泊碳汇潜力提供了科学的见解。

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引用次数: 0

Moisture evolution during the little ice age from shrub dune records in the lower Heihe River Basin, China 黑河下游灌丛沙丘记录的小冰期水分演变

IF 3.3 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Quaternary Science Reviews

Pub Date : 2025-12-27 DOI: 10.1016/j.quascirev.2025.109773

Xiaoyi Cui , Xiaokang Liu , Aimin Liang , Bing Liu , Tuoyu Li , Guoxiang Chen , Anqi Wang , Linhai Yang , Zhengyao Liu , Xingdi Yang , Yixue Zhao , Jiabing Liu , Zhengcai Zhang , Zhibao Dong

The Heihe River Basin, located on the periphery of the agro-pastoral ecotone in northwest China, serves as a vital nexus along the ancient silk road of China. Most studies in this region focus on millennial or suborbital scale climate evolution during the Holocene, with few high-resolution short-term time series reflecting local climate evolution. This study investigates a Tamarisk shrub dune profile in the lower Heihe River, utilizing high-resolution environmental sediment proxies (grain size, geochemical elements, total organic carbon) to reconstruct the effective moisture fluctuations during the Little Ice Age (LIA). The findings reveal significant climatic variability in the lower Heihe River during the LIA, with the profile capturing a pronounced wet period from 1430–1529 AD, and two notable arid intervals from 1634–1725 AD and 1790–1950 AD. These variations in effective moisture were strongly influenced by the North Atlantic Oscillation and solar activity cycles.

黑河流域位于中国西北农牧交错带的边缘，是中国古代丝绸之路的重要枢纽。该地区的研究多集中在全新世千年尺度或亚轨道尺度的气候演化上，反映局地气候演化的高分辨率短期时间序列较少。以黑河下游柽柳灌丛沙丘剖面为研究对象，利用高分辨率环境沉积物指标（粒度、地球化学元素、总有机碳）重建小冰期有效水分波动。结果表明，黑河下游在小冰期气候变化显著，1430 ~ 1529年为明显的湿润期，1634 ~ 1725年和1790 ~ 1950年为明显的干旱期。这些有效水分的变化受到北大西洋涛动和太阳活动周期的强烈影响。

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引用次数: 0