Palaeogeography, Palaeoclimatology, Palaeoecology最新文献_第8页

A semi-quantitative ichnological approach to relative oxygen reconstruction: A case study over the Cenomanian-Turonian Oceanic Anoxic Event 2 in west-Central Alberta, Canada 相对氧重建的半定量技术方法：以加拿大阿尔伯塔省中西部塞诺曼尼亚-土伦尼亚海洋缺氧事件2为例

IF 2.7 2区地球科学 Q2 GEOGRAPHY, PHYSICAL

Palaeogeography, Palaeoclimatology, Palaeoecology

Pub Date : 2025-12-31 DOI: 10.1016/j.palaeo.2025.113539

Sara K. Biddle, Murray K. Gingras

An exceptionally well-preserved organic-rich mudstone core from the Cenomanian-Turonian Oceanic Anoxic Event 2 (OAE2) interval in the Canadian Western Interior Seaway offers an excellent opportunity for comprehensive ichnological analysis of paleo‑oxygen fluctuations. Vertical trends in burrow size and diversity (i.e., Size-Diversity Index - SDI) have previously served as a proxy for relative oxygenation in low-oxygen stratigraphic settings. We note two factors that greatly impact oxygenation interpretations of SDI: (1) high bioturbation intensities or reworking dominantly by small (meiofaunal) animals lead to a large underestimation of ichnofossil diversity; and (2) paleoenvironmental stressors other than lowered oxygen levels (e.g., fluctuating salinity, reduced food availability, and rapid sedimentation). A semi-quantitative relative oxygen equation is proposed to account for these complexities and better proxy bottom water oxygenation over the interval. The equation combines diversity counts, burrow sizes, and bioturbation intensity (all indicators of high oxygenation), scaled with total organic carbon measurements (the presence of which is interpreted as an indicator of low oxygenation, corroborated by carbon isotope measurements over the interval). Integrating ichnological data with total organic carbon measurements accounts for the diminution and low diversity that may stem from a multitude of physicochemical factors. The results suggest that the bottom water oxygen fluctuated continuously and only very rarely, if at all, reached persistent anoxia. The proposed equation offers a repeatable approach to integrate ichnological and TOC data, providing a better ichnological-oxygen proxy for organic-rich mudstones.

加拿大西部内陆海道塞诺曼—土伦尼亚海洋缺氧事件2 （OAE2）段保存异常完好的富有机质泥岩岩心为古氧波动的综合技术分析提供了极好的机会。洞穴大小和多样性的垂直趋势（即大小多样性指数- SDI）以前被用作低氧地层环境中相对氧合的代表。我们注意到两个影响SDI氧合解释的因素：(1)高生物扰动强度或主要由小型（小动物）动物进行的重加工导致对鱼类化石多样性的严重低估；(2)除低氧水平外的古环境压力因素（如盐度波动、食物供应减少和快速沉积）。提出了一种半定量的相对氧方程来解释这些复杂性，并更好地代表整个层段的底水氧合。该方程结合了多样性计数、洞穴大小和生物扰动强度（所有高氧合的指标），并用总有机碳测量值（有机碳的存在被解释为低氧合的指标，并得到了区间内碳同位素测量值的证实）进行了标度。将技术数据与总有机碳测量相结合，可以解释可能由多种物理化学因素引起的多样性减少和低多样性。结果表明，底部水的氧气持续波动，只有很少的情况下，如果有的话，达到持续缺氧。所提出的方程提供了一种可重复的方法来整合技术和TOC数据，为富有机质泥岩提供了更好的技术-氧代表。

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引用次数: 0

Enhanced Asian monsoon hydroclimate instability during the mid-DO21 21世纪中期亚洲季风水文气候不稳定性增强

IF 2.7 2区地球科学 Q2 GEOGRAPHY, PHYSICAL

Palaeogeography, Palaeoclimatology, Palaeoecology

Pub Date : 2025-12-29 DOI: 10.1016/j.palaeo.2025.113519

Ziqi Mu , Tian Ma , Hao Lu , Dianbing Liu

The internal structure of Dansgaard-Oeschger (DO) events and its regional correlation provide key insights into climate anomalies under stable conditions, but remain poorly constrained due to geologic proxy uncertainties. Here a high-resolution stalagmite (∼ 9-year-resloved) δ¹⁸O record from Jiangjun Cave, central China was presented to reconstruct Asian summer monsoon (ASM) history across Marine Isotope Stage (MIS) 5a/4 (83–71 thousand years before present, ka). Our result revealed a two-phase structure of ASM variability during mid-DO21. Between 82.8 and 80.4 ka (Phase I), limited δ¹⁸O variance indicated relatively stable ASM intensity. Between 80.4 and 78.8 ka (Phase II), a ∼ 1.4-fold increase in decadal- to centennial-scale δ¹⁸O fluctuations reflected enhanced ASM variability. However, the δ¹⁵N-inferred Greenland temperature was higher and exhibited greater oscillations during the early mid-DO21, followed by a cooling and muted variability later, indicating opposite high- and low-latitude patterns during mid-DO21. We proposed that sea ice dynamics and Atlantic Meridional Overturning Circulation (AMOC) strength modulated the migration of Westerly jet, which in turn governed the inland moisture transport into the ASM region. During Phase I, a northerly-positioned Westerly jet amplified temperature fluctuations over Greenland with limited ASM variability. In Phase II, a southerly-displaced jet suppressed transport of proximal monsoonal moisture, while the periodic sea-ice variability induced latitudinal oscillations in the jet stream. These oscillations repeatedly altered the dominant moisture sources, thereby generating rapid decadal- to centennial-scale ASM fluctuations. Thus, our results highlighted multi-stage hydroclimate variability within interstadials and provided new insights into the role of sea-air-ice interactions in regulating low-latitude climate.

Dansgaard-Oeschger （DO）事件的内部结构及其区域相关性为稳定条件下的气候异常提供了关键见解，但由于地质代理的不确定性，仍然缺乏约束。本文利用中国中部蒋军洞的高分辨率石笋（~ 9年分辨率）δ18O记录，重建了亚洲夏季风（ASM）在海相同位素阶段（MIS） 5a/4（距今8.3 ~ 7.1万年）的历史。我们的结果显示，在21世纪中期，ASM的变化具有两相结构。在82.8 ~ 80.4 ka（第一阶段），δ18O变化有限，表明ASM强度相对稳定。在80.4 - 78.8 ka （II期）之间，年代际至百年尺度δ18O波动增加了~ 1.4倍，反映了ASM变异性的增强。然而，δ 15n推断的格陵兰岛温度在do21中期早期较高且振荡较大，随后变冷且变弱，表明在do21中期存在相反的高纬和低纬模式。海冰动力学和大西洋经向翻转环流（AMOC）强度调节了西风急流的迁移，西风急流又控制了内陆水汽输送到大西洋中部地区。在第1阶段，一股位于北方的西风急流放大了格陵兰岛上空的温度波动，但ASM变率有限。在第二阶段，南移的急流抑制了近端季风水汽的输送，而周期性的海冰变率引起了急流的纬向振荡。这些振荡反复改变了主要的水汽来源，从而产生了快速的年代际到百年尺度的海平面波动。因此，我们的研究结果突出了间带内的多阶段水文气候变率，并为海-气-冰相互作用在调节低纬度气候中的作用提供了新的见解。

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引用次数: 0

Late Holocene temperature changes in eastern North China reconstructed from branched glycerol dialkyl glycerol tetraethers (brGDGTs) 用支链甘油二烷基甘油四醚重建华北东部晚全新世温度变化

IF 2.7 2区地球科学 Q2 GEOGRAPHY, PHYSICAL

Palaeogeography, Palaeoclimatology, Palaeoecology

Pub Date : 2025-12-29 DOI: 10.1016/j.palaeo.2025.113530

Hongyu Song , Ying Wang , Huaying Wang , Can-Ge Li , Yuecong Li , Bing Li , Yawen Ge , Rongrong Wang , Xiuyun Sun , Ran Zhang , Hanfei You , Changhong Liu

Temperature is the climatic factor with the most significant impact on human society. Studying temperature changes during the late Holocene is crucial for understanding climate change mechanisms and predicting future trends. We measured the branched glycerol dialkyl glycerol tetraethers (brGDGTs) in a sediment core (CFD-E) from the Caofeidian Wetland in eastern North China and used the record to quantitatively reconstruct temperature changes during the late Holocene. The results show that the average mean annual temperature (MAT) in the eastern part of North China (from ∼3440 cal. yr BP to the present) was 11 °C, comparable to the current regional MAT of 11.2 °C. Overall, the MAT showed a slight increasing trend, with amplitudes not exceeding 1 °C. We identified six cold events, at approximately 3.2 ka, 2.8 ka, 2.5 ka, 1.5 ka, the cooling episode during the Medieval Climate Anomaly (MCA), and the possible Little Ice Age (LIA), with cooling amplitudes exhibiting a gradually decreasing temporal trend. The 3.2 ka event had the largest cooling amplitude; however, the cooling amplitude of this event elsewhere in this inland region was relatively low. We propose that this discrepancy resulted from the combined effects of a weakened Kuroshio Current and Yellow Sea Warm Current, which amplified the 3.2 ka cooling event in coastal regions relative to inland areas. Additionally, the possible LIA in the study area exhibited a relatively low cooling magnitude. We hypothesize that enhanced greenhouse gas forcing, combined with a strengthened Kuroshio Current and Yellow Sea Warm Current, muted the cooling signal associated with the LIA in the study area. The cooling episode during the MCA may have been driven by the weakening of the Yellow Sea Warm Current, caused by the combined weakening of the Kuroshio Current and the East Asian Winter Monsoon.

温度是对人类社会影响最大的气候因子。研究晚全新世的温度变化对理解气候变化机制和预测未来趋势具有重要意义。在华北东部曹非甸湿地沉积物岩心（CFD-E）中测量了支链甘油二烷基甘油四醚（brGDGTs），并利用该记录定量重建了晚全新世的温度变化。结果表明，华北东部地区（~ 3440 cal. yr BP至今）年平均气温（MAT）为11°C，与当前区域平均气温（11.2°C）相当。总体而言，MAT呈轻微上升趋势，幅度不超过1°C。我们发现了大约在3.2 ka、2.8 ka、2.5 ka和1.5 ka的6次冷事件，以及中世纪气候异常（MCA）期间的降温事件，以及可能的小冰期（LIA），冷却幅度呈现逐渐减小的时间趋势。3.2 ka事件冷却幅度最大；然而，该内陆地区其他地方的降温幅度相对较低。我们认为，这种差异是由减弱的黑潮和黄海暖流的共同作用造成的，它们放大了沿海地区相对于内陆地区的3.2 ka冷却事件。此外，研究区可能的LIA表现出相对较低的降温幅度。我们假设，温室气体强迫的增强，加上黑潮和黄海暖流的增强，减弱了与研究区域LIA相关的冷却信号。MCA期间的降温事件可能是由黑潮和东亚冬季风共同减弱造成的黄海暖流减弱所驱动的。

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引用次数: 0

Stability and precision in chronostratigraphic definition: The Global Boundary Stratotype Section and Point (GSSP) is the solution 年代地层定义的稳定性和精确性：全球边界层型剖面和点（GSSP）是解决方案

IF 2.7 2区地球科学 Q2 GEOGRAPHY, PHYSICAL

Palaeogeography, Palaeoclimatology, Palaeoecology

Pub Date : 2025-12-27 DOI: 10.1016/j.palaeo.2025.113515

David A.T. Harper , Lucia Angiolini , Charles M. Henderson , Thomas Servais

The concept of the Global Boundary Stratotype Section and Point (GSSP) to define the bases of chronostratigraphic units, indicated by a spike in rock, has endured for over half a century. Each boundary is defined by a spike in a rock succession, coincident with available biological and or other markers and represents a unique point in time to serve as the standard (yardstick) against which other successions can be correlated. The GSSPs are geological standards, referred to as stratotypes and are key reference points in time. The methodology has brought precision and stability to the definition of geological time, providing a global language for Earth science and Earth scientists. It is the largest cooperative venture in the history of the Earth sciences. In recent years, some challenges to this practice have been voiced questioning the validity of the GSSP concept. It is thus opportune to address misconceptions and misunderstandings and clearly reiterate the necessity of this approach and its success.

全球边界层型剖面和点（GSSP）的概念定义了年代地层单位的基础，由岩石中的尖峰表示，已经持续了半个多世纪。每个边界由岩石演替中的一个尖峰来定义，与现有的生物和/或其他标记相一致，代表了一个独特的时间点，可以作为其他演替的标准（尺度）。gssp是地质标准，被称为层型，是关键的时间参考点。该方法为地质年代的定义带来了精确和稳定，为地球科学和地球科学家提供了一种全球语言。这是地球科学史上最大的合作项目。近年来，有人对这种做法提出了一些挑战，质疑GSSP概念的有效性。因此，现在是消除误解和误解并明确重申这种做法及其成功的必要性的时机。

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引用次数: 0

Evolution of the westerlies and the East Asian winter monsoon during the late Miocene and Pliocene 中新世晚期和上新世期间西风带和东亚冬季风的演变

IF 2.7 2区地球科学 Q2 GEOGRAPHY, PHYSICAL

Palaeogeography, Palaeoclimatology, Palaeoecology

Pub Date : 2025-12-26 DOI: 10.1016/j.palaeo.2025.113529

Yan Zhao , Long Ma , Kang-Jun Huang , Yuanqiang Guo , Feng Pan , Ruiming Chen , Jianxing Li , Qi Wang , Jianan Wang

The evolution of the Northern Hemisphere mid-latitude westerlies and the East Asian winter monsoon (EAWM) have profoundly shaped the climate of inland Asia and provided critical insights into the interactions among regional climate, tectonic processes, and global climate change. However, their evolution during the Late Miocene and Pliocene-a key interval marked by significant uplift of the northeastern Tibetan Plateau and long-term global cooling-remains poorly constrained due to the scarcity of effective terrestrial records. In this study, we investigate representative aeolian sequences from regions dominated by the westerlies (the Caihonggou profile, 13–2.6 Ma, northern Tibetan Plateau) and from the EAWM domain (the Lianhua profile, 13–3.6 Ma, Chinese Loess Plateau). The coarse-grained fraction (>30 μm) of the aeolian deposits is used as a robust proxy for near-surface wind intensity. Our results indicate that both the westerlies and the EAWM intensified synchronously after ∼9 Ma, accompanied by enhanced aridification across the Asian interior. This widespread climate reorganization was primarily driven by the uplift of the Tibetan Plateau. In contrast, after ∼5.5 Ma, EAWM strength and regional aridity weakened, likely in response to global warming, whereas the westerlies remained relatively stable, indicating differing sensitivities of these wind systems to the same climatic forcing. Overall, our findings highlight the dominant role of Tibetan Plateau uplift, modulated by global climate change, in controlling Asian environmental evolution since the Late Miocene.

北半球中纬度西风带和东亚冬季风（EAWM）的演变深刻地塑造了亚洲内陆的气候，并为区域气候、构造过程和全球气候变化之间的相互作用提供了重要的见解。然而，由于缺乏有效的陆地记录，它们在晚中新世和上新世（青藏高原东北部显著隆升和全球长期变冷的关键时期）的演化仍然很少受到限制。本文研究了西风带主导地区（青藏高原北部13-2.6 Ma的彩虹沟剖面）和EAWM域（黄土高原13-3.6 Ma的莲花剖面）的代表性风成层序。风成沉积物的粗粒分数（>30 μm）被用作近地面风强度的可靠代表。我们的研究结果表明，西风带和EAWM在~ 9 Ma后同步增强，并伴随着亚洲内陆干旱化的增强。这种广泛的气候重组主要是由青藏高原的隆升驱动的。相比之下，在~ 5.5 Ma之后，EAWM强度和区域干旱减弱，可能是对全球变暖的响应，而西风带保持相对稳定，表明这些风系统对相同气候强迫的敏感性不同。总的来说，我们的研究结果强调了青藏高原隆升在全球气候变化的调节下，在晚中新世以来控制亚洲环境演变中的主导作用。

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引用次数: 0

Corrigendum to “Paleoenvironments and sulfur cycle anomalies of the Junggar Basin in the Middle Permian: Paleoclimatic implications for Gondwana deglaciation” [Palaeogeography, Palaeoclimatology, Palaeoecology, volume 682, 15 January 2026, 113435] “准噶尔盆地中二叠世古环境和硫循环异常：冈瓦纳脱冰的古气候意义”[古地理，古气候，古生态，第682卷，2026年1月15日，113435]

IF 2.7 2区地球科学 Q2 GEOGRAPHY, PHYSICAL

Palaeogeography, Palaeoclimatology, Palaeoecology

Pub Date : 2025-12-26 DOI: 10.1016/j.palaeo.2025.113526

Jingqiang Tan , Haibo Xu , Xueqi Song , Jinqi Xu , Xiongwen Lou , Wenbo Zhang , Ruining Hu

引用次数: 0

Moulting behaviors in oryctocephalid trilobites reveal ontogenetic shifts in ecdysial strategies 壳头三叶虫的蜕皮行为揭示了蜕皮策略的个体发生变化

IF 2.7 2区地球科学 Q2 GEOGRAPHY, PHYSICAL

Palaeogeography, Palaeoclimatology, Palaeoecology

Pub Date : 2025-12-25 DOI: 10.1016/j.palaeo.2025.113527

Yifan Wang , Jorge Esteve , Dezhi Wang , Guangying Ren , Hui Zhang , Xiuchun Luo , Xinglian Yang

Similar to other arthropods, trilobite underwent ecdysis as a periodic stage, and this life history strategy had a profound effect on their ontogeny and morphological evolution. Previous paleontological studies of moulting behavior in trilobites are based on few exuviae within later meraspides and holaspid phases, and also too little is known about ontogenetic mouting behavior in trilobites. Here, we investigate abundant exuviae exhibiting relatively complete ontogenetic sequences of Arthricocephalus chauveaui, Arthricocephalites xinzhaiheensis, Duyunaspis duyunensis and Changaspis elongata from the Cambrian Stage 4 Balang Formation. The results indicate two clear trends of ontogenetic moulting behavior in oryctocephalid trilobites during development. A. chauveaui utilized a single Somersault moulting pattern, which deals with opening the cephalic sutures (facial and rostral sutures), with lower cephalic unit (LCU) somersaulting anteriorly and lying beneath the trunk in moult assemblages. However, a gradual transition of moulting behavior during the development, from Somersault to Henningsmoen's moulting pattern, i.e., from inverting the LCU to disarticulated cranidium, is confirmed in Ar. xinzhaiheensis, D. duyunensis and C. elongata. This shift during development might reflect an evolutionary experiment with different moulting modes throughout development, a significant transition with macroevolutionary implications. The moulting mode may be canalized by structures that develop or change with growth, meaning that the change in strategy is not optional, but rather a consequence of morphological constraints and developmental pathway.

与其他节肢动物相似，三叶虫的蜕皮是一个周期阶段，这一生活史策略对其个体发生和形态进化产生了深远的影响。以往对三叶虫换羽行为的古生物学研究主要是基于后期元虫期和全虫期的少量蜕皮，对三叶虫个体发生换羽行为的了解也很少。本文研究了寒武系四期巴朗组丰富的具有相对完整个体发育序列的Arthricocephalus chauveaui、Arthricocephalites xinzaiheensis、Duyunaspis duyunensis和Changaspis elongata的遗存。结果表明，卵头三叶虫在发育过程中有两个明显的个体发生换羽行为趋势。a . chauveaui采用单一的翻筋斗换毛模式，即打开头侧缝合线（面部和吻侧缝合线），下头侧单位（LCU）向前翻筋斗，并在换毛组合中位于躯干下方。然而，在新寨河、杜云和长形猿中，蜕皮行为在发育过程中经历了从Somersault蜕皮模式到Henningsmoen蜕皮模式的逐渐转变，即从LCU倒置到头盖骨断裂。发育过程中的这种转变可能反映了在整个发育过程中不同换羽模式的进化实验，这是一个具有宏观进化意义的重大转变。换羽模式可能是由随着生长发育或变化的结构决定的，这意味着策略的变化不是可选择的，而是形态约束和发育途径的结果。

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引用次数: 0

Holocene fire dynamics and environmental drivers in Northeastern China: Insights from Lake Woniupaozi Sediments 东北地区全新世火灾动态与环境驱动因素：来自卧牛堡子湖沉积物的启示

IF 2.7 2区地球科学 Q2 GEOGRAPHY, PHYSICAL

Palaeogeography, Palaeoclimatology, Palaeoecology

Pub Date : 2025-12-24 DOI: 10.1016/j.palaeo.2025.113525

Weihe Ren , Xia Wang , Min Liu , Qiaoyu Cui , Jing Wu

Understanding the long-term dynamics and driving mechanisms of Holocene fire activity is essential for assessing vegetation–climate–fire interactions in monsoon-marginal regions. Here, we present a high-resolution 10.7 ka record of charcoal and Pediastrum from Lake Woniupaozi in the central Great Khingan Mountains, northeastern China. Combined with previously published pollen data, we assess the environmental significance of multiple proxies and explore the mechanisms underlying regional and local fire dynamics. The results show that: (1) Regional and local fires exhibited divergent trends over the Holocene, with enhanced regional fires during ∼10–8 ka and ∼ 3–1.4 ka, and dominant local fires during ∼10–5.5 ka; (2) The L/W ratio of charcoal is closely linked to arboreal pollen changes and serves as a reliable indicator of woody versus herbaceous fuel input; (3) Variations in Pediastrum body size are species-specific and likely respond to precipitation rather than temperature; (4) Quantitative reconstructions of growing-season temperature (T_Mar–Oct) based on Pediastrum assemblages are consistent with pollen-based summer temperature trends from nearby sites, highlighting warm conditions in the early and late Holocene. Proxy comparisons reveal that Holocene fire regimes were shaped by distinct mechanisms: (1) Regional fire activity was primarily driven by climate, with warm–dry periods favoring widespread burning; (2) Local fires were influenced by vegetation structure and biomass, with reduced biomass and increased woody cover after ∼5.5 ka suppressing fire occurrence. These findings highlight the need to consider both future drought trends and vegetation dynamics, as increased surface biomass may elevate local fire risks, whereas forest expansion could help buffer against fire spread and intensity.

了解全新世火灾活动的长期动态和驱动机制对于评估季风边缘地区植被-气候-火灾相互作用至关重要。本文报道了大兴安岭中部卧牛坝子湖10.7 ka高分辨率的木炭和pediastra记录。结合先前发表的花粉数据，我们评估了多个代理的环境意义，并探讨了区域和局部火灾动态的机制。结果表明：(1)全新世以来，区域和局地火灾表现出不同的趋势，区域火灾在~ 10-8 ka和~ 3-1.4 ka期间增强，局地火灾在~ 10-5.5 ka期间占优势；(2)木炭的L/W比与树木花粉变化密切相关，是木质与草本燃料输入的可靠指标；(3)小檗体型的变化具有物种特异性，可能对降水而非温度有响应；(4)基于Pediastrum组合的生长季节温度（t3 - 10月）定量重建与附近站点基于花粉的夏季温度趋势一致，突出了全新世早期和晚期的温暖条件。代用比较结果表明，全新世火情由不同的机制形成：(1)区域火灾活动主要受气候驱动，暖干期有利于大范围燃烧；(2)当地火灾受到植被结构和生物量的影响，在抑制火灾发生后约5.5 ka，生物量减少，木质覆盖增加。这些发现强调需要考虑未来的干旱趋势和植被动态，因为增加的地表生物量可能会增加当地的火灾风险，而森林扩张可以帮助缓冲火灾的蔓延和强度。

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引用次数: 0

Coupled tectonic-climatic-oceanographic dynamics drove the evolution of foraminiferal diversity in South China during the Middle to Late Mississippian 构造-气候-海洋耦合动力学驱动了密西西比中晚期华南有孔虫多样性的演化

IF 2.7 2区地球科学 Q2 GEOGRAPHY, PHYSICAL

Palaeogeography, Palaeoclimatology, Palaeoecology

Pub Date : 2025-12-24 DOI: 10.1016/j.palaeo.2025.113528

Chao Liu , Junjun Qi , Pedro Cózar , Ismael Coronado , Fei Li , Weiqing Liu , Meng Li , Ping Wang , Xin Li , Xia Hu , Song Jin

Understanding the interactions between biological evolution and other components of the Earth system, particularly tectonic, climatic, and environmental changes, has long been a central focus in Earth sciences. In this study, we present the first high-resolution foraminiferal species diversity curve spanning the late Visean to Serpukhovian from the Youjiang Basin of South China, integrated with multiple geochemical datasets, to elucidate the factors influencing foraminiferal diversification through robust correlations among sedimentological, biological, and geochemical records at a global scale. The widespread biodiversity crisis during the early late Visean (Aleksinian–Mikhailovian transition) is interpreted to have resulted from global oceanic bottom-water anoxia, coinciding with intensified continental silicate weathering and the onset of a major phase of Gondwanan glaciation. The uplift of the Hercynian orogenic belt, exposure of mantle-derived rocks at low latitudes, and the expansion of vascular plants during this interval are considered the primary driving mechanisms. Enhanced nutrients delivery to the oceans via terrestrial input elevated primary marine productivity and accelerated organic carbon export and burial, leading to excessive consumption of dissolved oxygen and other oxidants during organic matter degradation. Global foraminiferal radiation from the early late Visean to the earliest Serpukhovian is attributed to elevated dissolved oxygen concentrations and sufficient food availability, coupled with persistent carbonate supersaturation in contemporaneous upper ocean waters. The widespread loss of shallow shelf habitats, driven by the progression of the Hercynian orogeny and enhanced continental ice accumulation on Gondwana continent during the early to latest Serpukhovian, probably contributed to the observed foraminiferal diversity decline during this period. This study sheds new light on the interactions among various Earth systems during a period characterized by profound transformations in global paleogeography, climate, and oceanographic conditions.

了解生物进化与地球系统其他组成部分之间的相互作用，特别是构造、气候和环境变化，长期以来一直是地球科学的中心焦点。在此基础上，结合多组地球化学数据，首次建立了中国南方右江盆地晚Visean - Serpukhovian的高分辨率有孔虫物种多样性曲线，通过对全球范围内沉积学、生物学和地球化学记录的强相关性分析，阐明了影响有孔虫多样性的因素。在Visean早期晚期（Aleksinian-Mikhailovian过渡期），广泛的生物多样性危机被解释为全球海洋底水缺氧的结果，与大陆硅酸盐风化加剧和冈瓦纳冰川主要阶段的开始相吻合。海西造山带的隆升、低纬度幔源岩的暴露和维管植物的扩张被认为是主要的驱动机制。通过陆地输入向海洋输送的营养物质增加，提高了海洋初级生产力，加速了有机碳的输出和埋藏，导致有机物降解过程中溶解氧和其他氧化剂的过度消耗。从Visean晚期早期到Serpukhovian早期，全球有孔虫辐射归因于溶解氧浓度升高和充足的食物供应，以及同期上层海水中持续的碳酸盐过饱和。在Serpukhovian早期至晚期，海西期造山运动的推进和冈瓦纳大陆冰积累的增加导致了浅陆架栖息地的广泛丧失，这可能是该时期有孔虫多样性下降的原因。这项研究揭示了在全球古地理、气候和海洋条件发生深刻变化的时期，各种地球系统之间的相互作用。

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引用次数: 0

Resource partitioning and modernization of arthropod feeding strategies on Pennsylvanian medullosalean foliage from the Nord-Pas-de-Calais Coalfield, France 法国北部加来海峡煤田宾夕法尼亚延髓动物叶上的资源分配和节肢动物摄食策略的现代化

IF 2.7 2区地球科学 Q2 GEOGRAPHY, PHYSICAL

Palaeogeography, Palaeoclimatology, Palaeoecology

Pub Date : 2025-12-24 DOI: 10.1016/j.palaeo.2025.113517

Azucena Molina-Solís , Christopher J. Cleal , Artai A. Santos , Stephen McLoughlin , José B. Diez , Borja Cascales-Miñana

In recent years, there has been a dramatic increase in studies on plant-arthropod interactions in the fossil record. However, relatively few studies have targeted pre-Permian floras, which has hindered the reconstruction of trophic relationships in Carboniferous coal-forming ecosystems. Here, we document new evidence of arthropod and pathogen damage on Medullosales, which were prominent gymnosperm elements of Carboniferous coal forests, from the Nord-Pas-de-Calais Coalfield. We record 28 damage types (DTs) among 1206 fossil plant specimens belonging to Alethopteris and Lonchopteris. The damage categories are ascribed to seven functional feeding groups (FFGs): hole feeding (nine DTs), margin feeding (five DTs), surface feeding (three DTs), piercing and sucking (three DTs), oviposition (six DTs), galling (one DT), and pathogen attack (one DT). Rarefaction analyses evaluated sample completeness and clarified the damage incidence patterns. Our study provides the first quantitative assessment of herbivory from an Early–Middle Pennsylvanian terrestrial ecosystem. Although the proportion of damaged foliage is low (5.64% of specimens), its diversity is higher than in many younger (Late Pennsylvanian) floras. This suggests expansion and diversification of herbivore and pathogen attack at that time, which is consistent with the increased dominance of arborescent seed plants and the ascendancy of winged insects in the terrestrial fauna of the region. The presence of multiple feeding strategies on the studied medullosalean foliage indicates that this group of plants provided key food resources for diverse arthropod groups occupying the Nord-Pas-de-Calais palaeoforests. Almost all known types of FFGs are documented in the Nord-Pas-de-Calais fossil assemblages, suggesting that modern trophic relationships were likely established earlier than previously documented in Euramerican coal swamps.

近年来，化石记录中对植物-节肢动物相互作用的研究急剧增加。然而，针对前二叠纪植物群的研究相对较少，这阻碍了石炭系成煤生态系统营养关系的重建。本研究记录了石炭系煤林中裸子植物柱体（Medullosales）节肢动物和病原菌损害的新证据。我们在1206份植物化石标本中记录了28种损伤类型（DTs）。损伤类型可分为7个功能摄食组：洞食（9个）、边缘摄食（5个）、表面摄食（3个）、穿刺和吸吮（3个）、产卵（6个）、刺痛（1个）和病原体攻击（1个）。稀疏分析评价了样品的完整性，阐明了损伤的发生模式。我们的研究首次对宾夕法尼亚早期中期陆地生态系统的食草性进行了定量评估。虽然受损叶片的比例较低（5.64%），但其多样性高于许多较年轻（晚宾夕法尼亚）的植物区系。这表明该时期草食动物和病原体的攻击范围扩大和多样化，这与该地区陆生动物中乔木种子植物的优势地位增加和有翅昆虫的优势地位是一致的。研究表明，该植物群为占据北加来海峡古森林的不同节肢动物群体提供了重要的食物资源。几乎所有已知类型的ffg都记录在北加来海峡的化石组合中，这表明现代营养关系可能比之前在欧美煤沼泽中记录的更早建立。

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