Review of Palaeobotany and Palynology最新文献_第4页

Comparative pollen morphology of the genera Axyris L., Ceratocarpus L., Grayia Hook. & Arn. and Krascheninnikovia Gueldenst. (Amaranthaceae) 鸢尾属、角鼻花属、凤尾花属花粉形态比较。和攻击。和Krascheninnikovia Gueldenst。(苋科)

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-11-26 DOI: 10.1016/j.revpalbo.2025.105477

Zoya M. Tsymbalyuk , Daniella Ivanova , Lyudmila M. Nitsenko

Based on morphological, morphometric and molecular data, Axyris, Ceratocarpus and Krascheninnikovia, were classified to the subtribe Axyridinae, and later this group was elevated to tribe Axyrideae (Chenopodiaceae / Amaranthaceae). Previously, the representatives of these three genera, together with Grayia, have been included in the subtribe Eurotiinae. Their relationships are poorly understood; the position of Grayia still remains unclear. Considering that palynomorphological traits can be useful for angiosperm taxonomy, the aim of this research was to provide detailed data on the Axyrideae and Grayia pollen characters and to evaluate their taxonomic significance. Pollen morphology of 13 specimens belonging to seven species of the genera Axyris, Ceratocarpus, Grayia (including Zuckia), and Krascheninnikovia was studied using light and scanning electron microscopy. Pollen grains are pantoporate, spheroidal, mainly circular in outline, small or medium-sized. Exine sculpture and pore membranes are nanoechinate, tectum is psilate-perforate. The data obtained showed that species and genera can be identified based on palynomorphological features, especially the pollen diameter, pore number, pore diameter, distance between pores and between pore centres, nanoechini density, number of nanoechini on pore membranes, exine thickness, and structure of columellae. Exine structure (columellae) of pollen grains of all species was analysed for the first time in the present study. UPGMA dendrogram, based on quantitative pollen traits (nanoechini height, width at the base, number per 4 μm², and number on pore membrane), supported the differentiation of genera. The data obtained confirm the close relationships between tribe Axyrideae (Axyris, Ceratocarpus, Krascheninnikovia) and Grayia (including Zuckia). This study highlights the importance of palynomorphological characters for the taxonomy.

根据形态学、形态测量学和分子测量学资料，将Axyris、Ceratocarpus和Krascheninnikovia划分为Axyridinae亚族，后将其提升为axyridae族（Chenopodiaceae / amaranaceae）。在此之前，这三个属的代表，连同格雷亚，被包括在欧洲亚族。人们对它们之间的关系知之甚少；格雷娅的位置仍不明朗。考虑到花粉形态特征对被子植物的分类有重要意义，本研究的目的是为被子植物的花粉特征提供详细的资料，并评价其分类意义。本文采用光镜和扫描电镜技术研究了石竹属（Axyris）、Ceratocarpus、Grayia（包括Zuckia）和Krascheninnikovia 7种13个标本的花粉形态。花粉粒为宽孔状，球形，轮廓以圆形为主，小或中等。外叶雕刻和孔膜呈纳米针状，顶盖呈具囊孔状。根据孢粉形态特征，特别是花粉直径、孔数、孔直径、孔间和孔中心之间的距离、纳米针孔密度、孔膜上纳米针孔数、外壁厚度和小柱结构，可以进行种属鉴定。本研究首次对所有树种花粉粒的外叶结构（小柱）进行了分析。UPGMA树状图显示花粉的数量特征（纳米针尖高度、基部宽度、每4 μm2数量和孔膜数量）支持属的分化。所获得的资料证实了axyridae部落（Axyris, Ceratocarpus, Krascheninnikovia）和Grayia（包括Zuckia）之间的密切关系。本研究强调了形态学特征对植物分类学的重要性。

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引用次数: 0

Palynological analysis of the La Anita and Cerro Fortaleza formations (Campanian), southern margin of the Viedma Lake, Santa Cruz Province, Argentina 阿根廷圣克鲁斯省Viedma湖南缘La Anita和Cerro Fortaleza组（Campanian）的孢粉学分析

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-11-23 DOI: 10.1016/j.revpalbo.2025.105475

P.E. Santamarina , V.D. Barreda , M.S. González Estebenet , V. Guler , E.S. Bellosi , F. Novas

We present the palynological assemblages recovered from the upper part of the La Anita and Cerro Fortaleza formations (Campanian) from SW Patagonia, Argentina. A total of 73 continental species and 11 dinoflagellate cysts species were identified in this study. Continental species comprise 17 bryophytes and lycophytes, 20 ferns, 14 gymnosperms, 21 angiosperms, and 1 of uncertain affinity. The palynofloras are strongly dominated by gymnosperms, with angiosperms and ferns as secondary components. Cluster analysis employed to explore floristic similarities with Campanian–Maastrichtian palynofloras reveals two main groups: one grouping the palynofloras presented here and another grouping Campanian–Maastrichtian palynofloras from southern South America and the Antarctic Peninsula. The occurrence of spores attributable to Salviniales and Anemiaceae, along with pollen grains referable to Symplocaceae, Aquifoliaceae, and Arecaceae suggests a humid and temperate climate. The presence of Odontochitina porifera and Nelsoniella aceras suggests a late Santonian–early Maastrichtian age of deposition. In addition, continental palynological assemblages are consistent with the Campanian age established by radiometric dating. A comparative assessment of angiosperm diversity and abundance within these assemblages and published records indicates that angiosperms had not yet become the dominant floral component in southern Patagonia during the Late Cretaceous, in contrast to coeval floras at similar paleolatitudes in the Northern Hemisphere. However, further high-resolution palynological analyses are needed to refine our understanding of floristic composition, biogeographic patterns, and the time and mode of angiosperm diversification in southern Patagonia during the late Cretaceous.

本文报道了阿根廷巴塔哥尼亚西南部La Anita组和Cerro Fortaleza组（Campanian）上部的孢粉组合。本研究共鉴定了73种大陆种和11种鞭毛囊类。陆生植物包括苔藓和石松植物17种，蕨类植物20种，裸子植物14种，被子植物21种，亲缘性不确定的植物1种。孢粉植物以裸子植物为主，被子植物和蕨类植物次之。通过聚类分析，揭示了其与坎帕尼亚-马斯特里希特孢粉植物区系的相似性，并将其划分为两大类群：一类是本文所展示的孢粉植物区系，另一类是来自南美洲南部和南极半岛的坎帕尼亚-马斯特里希特孢粉植物区系。孢子属于saliniales和Anemiaceae，花粉粒属于Symplocaceae， Aquifoliaceae和arerecaceae，表明气候湿润温和。Odontochitina porifera和Nelsoniella aceras的存在表明沉积时代为圣安东尼奥晚期-马斯特里赫特早期。此外，大陆孢粉组合与辐射测年确定的坎帕尼亚年龄一致。对这些植物组合中的被子植物多样性和丰度的比较评估和已发表的记录表明，被子植物在晚白垩世尚未成为南巴塔哥尼亚的主要植物成分，与北半球类似古纬度的同期植物区系形成对比。然而，需要进一步的高分辨率孢粉学分析来完善我们对晚白垩世巴塔哥尼亚南部植物区系组成、生物地理格局以及被子植物多样化的时间和模式的理解。

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引用次数: 0

Barrealoxylon nelsonii gen. et sp. nov., a new Pennsylvanian (Carboniferous) fossil stem from Gondwana: Botanical affinity and paleoclimatic implications Barrealoxylon nelsonii gen. et sp. nov.，冈瓦纳石炭纪宾夕法尼亚新化石：植物亲和性及其古气候意义

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-11-19 DOI: 10.1016/j.revpalbo.2025.105476

Osvaldo A. Conde , Roberto R. Pujana , Gustavo A. Correa , M. Lucía Balarino

This contribution describes a new gymnospermous fossil stem from western Gondwana. Barrealoxylon nelsonii nov. gen. et sp. was recovered from the Pituil Formation (Early Pennsylvanian), Calingasta-Uspallata Basin in San Juan Province, Argentina. The new species is characterized by a septate pith and mesarch primary xylem. The secondary xylem shows distinct growth ring boundaries, tracheids with uniseriate to triseriate araucarian pits in radial walls, pits in tangential walls, and cross-fields with 1–2, rarely 3, “window-like” (= fenestriform) pits. The combination of a septate pith and the primary and secondary xylem characteristics supports its assignment to the Cordaitales, providing further evidence for the presence of this group in southwestern Gondwana. The secondary xylem of the new stem has D-type growth rings, indicative of uniform growth conditions followed by a final stage of reduced vascular cambium activity. This type of growth ring is consistent with the high-humidity climatic conditions that prevailed during the Terminal Glacial Stage in western Gondwana.

这一贡献描述了来自冈瓦纳西部的一种新的裸子植物化石。在阿根廷圣胡安省Calingasta-Uspallata盆地的垂体地层（宾夕法尼亚早期）中发现了梭梭猴。新种的特征是具有隔髓和mesarch初生木质部。次生木质部有明显的生长环边界，管胞在径向壁上有单胚轴到三胚轴的小坑，在切向壁上有小坑，交叉区域有1-2个，很少有3个“窗状”（=窗状）小坑。分离髓和初生和次生木质部特征的结合支持了其归属于cordaitale，为冈瓦纳西南部存在这一类群提供了进一步的证据。新茎的次生木质部具有d型生长环，表明生长条件均匀，随后是维管形成层活性降低的最后阶段。这种类型的生长环与冈瓦纳西部冰川末期盛行的高湿度气候条件相一致。

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引用次数: 0

A new Coniopteris (Dicksoniaceae) from the Middle Jurassic of the Baojishan Basin, Gansu, China, with discussion on its heteromorphic pinnule characteristics 甘肃宝鸡山盆地中侏罗统一新种针蕨属（针蕨科）及其异型花序特征探讨

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-11-08 DOI: 10.1016/j.revpalbo.2025.105467

Lan-Xing Wei, Cun-Lin Xin, Zhi -Peng Jiao, Fang-Fang Zhang, Hong Li

Coniopteris (Dicksoniaceae) is a species-rich and diverse Mesozoic fern genus. Based on well-preserved material from the Middle Jurassic Yaojie Formation in the Baojishan Basin, Gansu, China, we combine macromorphology with microstructural characters to describe a new species—Coniopteris baojishanensis Wei et Xin, sp. nov. The frond is lanceolate and at least bipinnate; the ultimate pinnae bear a basal pair of heteromorphic pinnules; the rachis bears a conspicuous longitudinal ridge. Sterile pinnules are elongate-ovate; fertile pinnules are slightly contracted, ovate. A preliminary analysis of the evolutionary distribution of heteromorphic pinnules in Coniopteris indicates first appearance in the Early Jurassic, a peak in the Middle Jurassic, and marked decline by the Cretaceous. We interpret heteromorphic pinnules as an adaptation to moist, low-light understory conditions: by enlarging area or increasing the degree of dissection, they increase light capture and enhance photosynthetic efficiency, thereby improving competitive ability within the community. This study enriches the Chinese fossil record of Coniopteris and provides new clues to the formation of its heteromorphic pinnules.

刺蕨属（刺蕨科）是中生代蕨类植物中种类丰富、种类多样的一个属。根据甘肃宝鸡山盆地中侏罗统姚界组保存完好的材料，结合宏观形态和微观结构特征，描述了一个新种——coniopteris baojishanensis Wei et Xin， sp. 11。末级羽片生一对异型小羽片；轴有明显的纵脊。不育小穗状花序拉长卵形；可育小叶稍收缩，卵形。对锥翼兽异型小尖的演化分布进行初步分析，表明锥翼兽的异型小尖最早出现于早侏罗世，在中侏罗世达到顶峰，在白垩纪显著下降。我们将异型小叶解释为对潮湿、低光照林下条件的适应：它们通过扩大面积或增加解剖程度，增加光捕获和提高光合效率，从而提高群落内的竞争能力。本研究丰富了刺蕨属的中国化石记录，为其异型小尖的形成提供了新的线索。

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引用次数: 0

Assessment of herbivore densities using Sporormiella as a palynological proxy: Indian context and the way forward 用孢杆菌作为孢粉代用物的草食动物密度评估：印度背景和前进方向

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-11-04 DOI: 10.1016/j.revpalbo.2025.105466

Mohammad Firoze Quamar , Nagendra Prasad , Biswajeet Thakur , Maneesha Muraleedharan ET

Herbivory plays a crucial role as a long-term driver of ecosystem changes. Understanding the interactions between herbivores and ecosystems is particularly important for shaping conservation policies, especially those focused on re-wilding. Additionally, understanding changes in the abundance of large herbivores over time and assessing the role of key animal species in disturbance regimes, biodiversity dynamics, and ecosystem resilience remains a significant challenge in long-term ecological studies. Spores specific to herbivore dung offer a valuable source of information on past herbivore populations. Sporormiella, a coprophilous fungal spore that grows on herbivore dung, serves as an important proxy for reconstructing the presence and/or abundance of megaherbivores, livestock density, grazing activity (pastoralism), human impact, extinction events, and the effects of husbandry practices on the natural environment over time and across regions. In India, the application of Sporormiella as a proxy for herbivore presence and abundance remains at an early stage and requires further systematic testing. This review article aims to evaluate the potential of Sporormiella in reconstructing herbivore presence and abundance across different temporal and spatial scales in India. The synthesis of Sporormiella records from both modern and the Holocene sediment samples provides insights into past herbivore densities. Additionally, this study discusses various factors influencing the composition of the spores of coprophilous fungi, and the abundance of Sporormiella, potential constraints on their preservation in certain settings, and the limitations of current research. This research review article also outlines broader implications and directions for the future research.

草食在生态系统变化的长期驱动中起着至关重要的作用。了解食草动物和生态系统之间的相互作用对于制定保护政策尤其重要，特别是那些专注于重新野生化的政策。此外，了解大型食草动物丰度随时间的变化，评估关键动物物种在干扰制度、生物多样性动态和生态系统恢复力中的作用，仍然是长期生态学研究的重大挑战。草食动物粪便特有的孢子为过去的草食动物种群提供了宝贵的信息来源。孢子菌（Sporormiella）是一种生长在食草动物粪便上的嗜粪真菌孢子，可作为重建大型食草动物存在和/或丰度、牲畜密度、放牧活动（畜牧）、人类影响、灭绝事件以及畜牧业对自然环境的影响的重要指标。在印度，Sporormiella作为草食动物存在和丰度的代表的应用仍处于早期阶段，需要进一步的系统测试。本文旨在评估孢子菌在印度不同时空尺度上重建草食动物存在和丰度的潜力。从现代和全新世沉积物样本中合成的孢子菌记录提供了对过去食草动物密度的见解。此外，本研究还讨论了影响粪亲真菌孢子组成的各种因素、孢子菌的丰度、在某些环境下保存孢子菌的潜在限制以及当前研究的局限性。这篇研究综述文章还概述了更广泛的意义和未来的研究方向。

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引用次数: 0

Cactaceae fossil pollen grains recovered from 15.6-Ma evaporites in south-central Mexico 墨西哥中南部15.6 ma蒸发岩中发现的仙人掌科化石花粉粒

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-10-30 DOI: 10.1016/j.revpalbo.2025.105463

Elia Ramírez-Arriaga , Aarón Rodríguez-Reyes , Mercedes B. Prámparo , Azucena Canto , Laura Elena Gómez-Lizárraga , G. Iriliana López-Caballero , Alfonso Valiente-Banuet

Cacti constitute one of the most iconic and highly diversified groups of plants in the Americas, as Mexico, the Andean region, and eastern Brazil are the main centers of diversity. For many years, its divergence time has been the central question and an enigmatic topic since research has always been hindered by the scarcity of fossil records. The present study documents the palynological diversity of tricolpate and pantocolpate pollen grains with Cactaceae affinity during the Middle Miocene in the Tehuacán-Cuicatlán Valley, an important center of cactus diversity in south-central Mexico. Aridity during this period coincides with the Mid-Miocene Climatic Optimum and is supported by evaporitic rocks from the upper part of the Tehuacán Formation (TF). Tricolpate pollen grains similar to Cephalocereus-Mammillaria cactus genus, were less abundant in the TF, and cluster analysis distinguished three groups. Furthermore, principal component analysis (PCA) showed that the polar area index, the distance between the apices of the colpi, and the equatorial diameter were the characteristics that explained the maximum variance among the tricolpate specimens. In addition, three groups were identified among the pantocolpate specimens with affinities to the genus Pereskia-Opuntia. PCA of the pantocolpate pollen grains revealed that pollen diameter, columella diameter and density, columella length, exine thickness, and spinule density explained the maximum variance among these grains. Miocene pollen grains from Cactaceae were shorter than those of modern species, suggesting that adaptations to the arid climate may have triggered polyploidy and an increase in pollen grain size.

仙人掌是美洲最具代表性和高度多样化的植物群之一，因为墨西哥、安第斯地区和巴西东部是多样性的主要中心。多年来，它的分化时间一直是一个中心问题，也是一个谜题，因为化石记录的缺乏一直阻碍着研究。本文研究了墨西哥中南部重要的仙人掌多样性中心Tehuacán-Cuicatlán山谷中中新世具有仙人掌科亲缘关系的三孔和pantocolpate花粉粒的孢粉学多样性。这一时期的干旱与中中新世气候最适宜期一致，并受到Tehuacán组上部蒸发岩的支持。与Cephalocereus-Mammillaria cactus属相似的Tricolpate花粉粒在TF中的丰度较低，聚类分析将其划分为3个类群。此外，主成分分析（PCA）表明，极地面积指数、趾尖间距离和赤道直径是解释三足动物标本间最大方差的特征。此外，还鉴定出3个类群与Pereskia-Opuntia属有亲缘关系。花粉粒的主成分分析表明，花粉直径、小柱直径和密度、小柱长度、外壁厚度和小刺密度是各粒间差异最大的解释因子。中新世仙人掌科的花粉粒比现代仙人掌科的花粉粒短，表明对干旱气候的适应可能引发了多倍体和花粉粒大小的增加。

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引用次数: 0

Taphonomic Completeness: A new metric for assessing fossil leaf preservation using the Spitsbergen Cenozoic fossil flora 埋藏完整性：利用斯匹次卑尔根新生代化石区系评估化石叶片保存的新指标

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-10-30 DOI: 10.1016/j.revpalbo.2025.105464

Harrison O'Rourke , Eimear Nic Lughadha , Karen L. Bacon

Leaves are the most common type of plant macrofossil found in the plant fossil record; however, comparing leaf preservation quality across plant groups, sites, and time periods is challenging. A new metric was devised that allowed the quality of leaf preservation to be quantitatively measured for leaf fossils preserved from different localities, timepoints and plant life forms, based on a suite of leaf traits. The metric produces a score between 6 (high quality preservation) and 0 (low quality preservation). The leaf traits visible in the Spitsbergen Cenozoic fossil flora were studied to analyse the effect of leaf traits on preservation potential. Non-metric multidimensional scaling indicated that plant life form strongly influenced the leaf traits preserved within the Spitsbergen fossil flora, while stratigraphy had a much weaker effect, indicating that depositional environment and climate influenced preservation less than plant life form. The ‘Taphonomic Completeness’ metric indicated that the gymnosperms and ferns had a significantly higher leaf preservation quality than the woody angiosperms and the herbaceous angiosperms, with the latter group having the lowest quality preservation overall. This result suggests that there may be a bias against the leaves of herbaceous species being preserved in the fossil record, which has implications for interpreting the plant fossil record and how paleo ecosystems functioned. Additionally, the development of this quantitative ‘Taphonomic Completeness’ metric provides a standardised approach that can be widely applied to fossil leaf assemblages from other sites and time periods, allowing robust, large-scale comparisons of preservation quality across fossil floras.

叶子是植物化石记录中最常见的植物大化石类型；然而，比较不同植物类群、地点和时间段的叶片保存质量是具有挑战性的。设计了一种新的度量标准，可以根据一系列叶片特征，对不同地点、时间点和植物生命形式保存的叶片化石的叶片保存质量进行定量测量。该度量产生的分数在6（高质量保存）和0（低质量保存）之间。研究了斯匹次卑尔根新生代植物区系中可见的叶片性状，分析了叶片性状对保存潜力的影响。非度量多维尺度表明，植物生命形式对斯匹次卑尔根化石区系中保存的叶片性状影响较大，而地层的影响较弱，表明沉积环境和气候对保存的影响小于植物生命形式。结果表明，裸子植物和蕨类植物的叶片保存质量显著高于木本被子植物和草本被子植物，草本被子植物的叶片保存质量最低。这一结果表明，化石记录中保存的草本物种的叶子可能存在偏见，这对解释植物化石记录和古生态系统的功能具有重要意义。此外，这种定量的“埋藏完整性”指标的发展提供了一种标准化的方法，可以广泛应用于其他地点和时期的化石叶片组合，允许对化石区系的保存质量进行可靠的大规模比较。

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引用次数: 0

First records of Pinuxylon and Xenoxylon wood from the Cretaceous in Shandong Province, Northeast China 山东白垩纪初见梭梭木和Xenoxylon木的记录

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-10-30 DOI: 10.1016/j.revpalbo.2025.105465

Ruiying Hao , Zhanchun Zou , Zikun Jiang , Kemin Xu , Ning Tian , Zhenguo Ning , Aowei Xie , Xiao Shi , Yongdong Wang , Guohua Xu , Fuxia Zhang

Early Cretaceous petrified wood demonstrates remarkably high diversity across both northern and southern phytoprovinces in China. In recent years, an increasing number of fossil wood discoveries have been made in Cretaceous deposits throughout China, while current research on Early Cretaceous fossil wood remains primarily focused on the northeastern region. However, Cretaceous fossil wood occurrences remain exceptionally scarce in Shandong Province compared with other regions. This study reports the first discovery of well-preserved fossil wood from the Lower Cretaceous in the Jiaolai Basin, represented by two taxa, i.e., Pinuxylon shandongense sp. nov. and Xenoxylon latiporosum (Cramer) Gothan. Notably, P. shandongense sp. nov. constitutes the earliest fossil record of the genus Pinuxylon reported. Phenetic analysis of anatomical characters indicates that this new species is most closely related phylogenetically to P. pinastroides (Kraus) Stockmans et willière. Furthermore, anatomical examination of Xenoxylon latiporosum combined with growth-ring analysis of Keteleerioxylon shandongense indicates that the Jiaolai Basin experienced a seasonal climate during the Early Cretaceous, characterized by localized humid zones within a predominantly arid regime. These discoveries markedly expand the fossil records of Xenoxylon and Pinuxylon, providing unprecedented clarity regarding floristic assemblages in the ecotone between northern and southern phytoprovinces. They yield critical insights into both Mesozoic wood evolution and the paleobiogeography of Cretaceous fossil woods in East Asia. Furthermore, our reconstruction of Early Cretaceous paleoenvironments in the Jiaolai Basin, based on growth-ring analysis, establishes fundamental evidence for Cretaceous paleoclimatic reconstructions in this region.

早白垩世的石化木材在中国北部和南部的植物省都显示出非常高的多样性。近年来，在中国各地白垩纪沉积物中发现了越来越多的木化石，但目前对早白垩世木化石的研究仍主要集中在东北地区。然而，与其他地区相比，山东省白垩纪木材化石产地仍然异常稀少。本文报道了在胶莱盆地首次发现保存完好的下白垩统木材化石，以Pinuxylon shandongense sp. 11和Xenoxylon latiporosum (Cramer) Gothan两个分类群为代表。值得注意的是，P. shandonggense sp. nov.是目前报道的最早的Pinuxylon属化石记录。解剖性状的表型分析表明，该新种与P. pinastroides (Kraus) Stockmans et will的系统亲缘关系最为密切。此外，结合对山东油桐生长年轮的分析，对油桐的解剖分析表明，早白垩世胶莱盆地经历了一个季节性气候，以干旱为主的局部湿润带为特征。这些发现显著扩展了Xenoxylon和Pinuxylon的化石记录，为南北植物省之间过渡带的植物区系组合提供了前所未有的清晰度。它们提供了对中生代木材演化和东亚白垩纪化石木材的古生物地理学的重要见解。此外，在生长年轮分析的基础上重建了胶莱盆地早白垩世古环境，为该地区重建白垩世古气候奠定了基础。

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引用次数: 0

Monitoring seasonal pollen deposition in an arid environment using Tauber traps: ecological and aerobiological insights from Kashan, central Iran 利用陶伯捕集器监测干旱环境中的季节性花粉沉积：来自伊朗中部卡尚的生态和有氧生物学见解

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-10-22 DOI: 10.1016/j.revpalbo.2025.105462

Elham Mahlooji , Morteza Djamali , Hossein Akhani , Emmanuel Gandouin , Hossein Batooli , Marzieh Heidarzadeh Arani , Mohammad-Reza Mozdianfard

Monitoring atmospheric pollen deposition with Tauber traps has long supported palaeoecological studies in temperate regions of Europe, but their application in arid regions and their potential in aerobiology remain underexplored. We installed Tauber traps at three sites in Kashan and neighboring towns on the western margin of the central Iranian desert, with weekly and monthly (4-weekly) collections over one year, to assess their efficiency in capturing seasonal airborne pollen. The traps reliably reflected both regional desert-steppe vegetation and urban or peri-urban plantations. Comparison with clinical allergy data shows that Chenopodiaceae (s. str.) and Artemisia, together with Morus alba, Olea europaea, and Cupressus, are the major airborne allergens in Kashan. Our findings stress that the allergenic importance of Chenopodiaceae and Artemisia—dominant in summer and autumn pollen rains—has been underestimated in regional aerobiological surveys and clinical testing, which typically rely on a narrow set of non-native extracts. We propose that Tauber traps, as a simple and inexpensive tool, could complement aerobiological monitoring in remote drylands and inform both ecological and medical studies.

利用陶伯捕集器监测大气花粉沉积长期以来一直支持欧洲温带地区的古生态学研究，但其在干旱地区的应用及其在空气生物学中的潜力仍未得到充分探索。我们在伊朗中部沙漠西部边缘的卡尚和邻近城镇的三个地点安装了陶伯捕集器，在一年的时间里每周和每月（4周）收集一次，以评估它们捕捉季节性空气传播花粉的效率。捕集器可靠地反映了区域荒漠草原植被和城市或城郊人工林。与临床变态反应资料比较发现，喀山地区空气中主要的变态反应原为藜科（s.s str.）和青蒿科，以及桑、油橄榄和柏树。我们的研究结果强调，Chenopodiaceae和蒿属植物在夏季和秋季花粉雨中占主导地位，在区域空气生物学调查和临床试验中被低估了，这些调查和临床试验通常依赖于一组狭窄的非本地提取物。我们建议，陶伯捕集器作为一种简单而廉价的工具，可以补充偏远旱地的空气生物学监测，并为生态和医学研究提供信息。

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引用次数: 0

Deep learning of pollen images under low annotation costs: joint optimization of morphological features and training and prediction strategies 低标注成本下花粉图像的深度学习：形态特征与训练预测策略的联合优化

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Review of Palaeobotany and Palynology

Pub Date : 2025-10-21 DOI: 10.1016/j.revpalbo.2025.105458

Teng Zhang , Limi Mao

Pollen identification is of great importance in the fields of palynology, palaeoecology, botany, medicine and forensic science, but traditional microscopic morphological analysis methods are inefficient and subjective. In this study, we propose an innovative approach based on deep learning to improve the accuracy and efficiency of pollen identification. We constructed a high-quality pollen dataset containing 5521 images of 141 species and a structured attribute table containing 20 standardized morphological features. With an improved ResNet50 architecture, the model utilizes a masking mechanism to combine image features with morphological data, significantly improving classification performance. In addition, we propose a joint training strategy that utilizes both weakly labeled data (unlabeled images + some morphological features) and fully labeled data to alleviate the data scarcity problem. The experimental results show that with the introduction of morphological features, the accuracy of the model significantly improves from 83.00% to at least 89.49% and exhibits stronger generalization ability, effectively reducing overfitting. This study provides a scalable solution for automated pollen identification, addressing key challenges in data utilization and classification accuracy.

花粉鉴定在孢粉学、古生态学、植物学、医学和法医学等领域具有重要意义，但传统的显微形态分析方法效率低、主观性强。在本研究中，我们提出了一种基于深度学习的创新方法来提高花粉鉴定的准确性和效率。我们构建了一个高质量的花粉数据集，包含141个物种的5521张图像和包含20个标准化形态学特征的结构化属性表。该模型采用改进的ResNet50架构，利用掩蔽机制将图像特征与形态学数据相结合，显著提高了分类性能。此外，我们提出了一种利用弱标记数据（未标记图像+一些形态学特征）和完全标记数据的联合训练策略，以缓解数据稀缺性问题。实验结果表明，引入形态特征后，模型的准确率从83.00%显著提高到89.49%以上，具有更强的泛化能力，有效地减少了过拟合。该研究为花粉自动识别提供了一个可扩展的解决方案，解决了数据利用和分类准确性方面的关键挑战。

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引用次数: 0