Review of Palaeobotany and Palynology最新文献_第2页

Algae from the Lower Devonian Rhynie chert: Harpericystis verecunda gen. et sp. nov., a probable green alga (Chlorophyta) that forms few-celled colonies 来自下泥盆世 Rhynie chert 的藻类：Harpericystis verecunda gen.

IF 1.7 3区地球科学

Review of Palaeobotany and Palynology Pub Date : 2024-09-06 DOI: 10.1016/j.revpalbo.2024.105190

{"title":"Algae from the Lower Devonian Rhynie chert: Harpericystis verecunda gen. et sp. nov., a probable green alga (Chlorophyta) that forms few-celled colonies","authors":"","doi":"10.1016/j.revpalbo.2024.105190","DOIUrl":"10.1016/j.revpalbo.2024.105190","url":null,"abstract":"<div><p>The Lower Devonian Rhynie chert preserves a remarkable diversity of microorganisms from an early terrestrial ecosystem. However, eukaryotic microalgae are rarely reported. This study describes <em>Harpericystis verecunda</em> gen. et sp. nov., a probable green alga (Chlorophyta) from the Rhynie chert, using more than 50 specimens, all of which are enclosed in a degraded land plant axis. Specimens include single cells up to 8(−10) μm in diameter, dyads, decussate and tetrahedral tetrads, and small colonies comprised of 8 or 16 cells. Other specimens consist of both larger cells and tetrads of smaller cells, which either are the result of successive cell divisions (autosporogenesis), or have formed from multinucleate parent cells by directed cytokinesis. Cells, cell groups, and colonies are surrounded by a colorless mucilage. In some cases, it appears that the constituent cells of the colonies are interconnected by thickened plates of their envelopes or short processes. <em>Harpericystis verecunda</em> was non-motile and most likely planktonic. It shows similarities with various present-day colony-forming green algae, in particular with <em>Coelastrum</em> (Sphaeropleales) and <em>Sphaerocystis</em> (Chlamydomonadales), but its systematic affinity remains unresolved. This discovery is further evidence that intra-plant environments facilitated the preservation of fragile microbial life in the Rhynie setting.</p></div>","PeriodicalId":54488,"journal":{"name":"Review of Palaeobotany and Palynology","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142164374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 ‘4.2 ka drought event’ and the fall of the Harappan Civilization: A critical review 4.2 ka干旱事件 "与哈拉帕文明的衰落：批判性评论

IF 1.7 3区地球科学

Review of Palaeobotany and Palynology Pub Date : 2024-09-03 DOI: 10.1016/j.revpalbo.2024.105187

{"title":"The ‘4.2 ka drought event’ and the fall of the Harappan Civilization: A critical review","authors":"","doi":"10.1016/j.revpalbo.2024.105187","DOIUrl":"10.1016/j.revpalbo.2024.105187","url":null,"abstract":"<div><p>The role of climate variability in the expansion and collapse of the Harappan Civilization in South Asia has been a subject of intense research and debate among archaeologists, Quaternary climate scientists, meteorologists, climatologists, historians, geographers, archaeobotanists, and anthropologists. Moreover, high-resolution palaeoclimatic studies have challenged the previous perspectives attributing societal collapses solely to socio-political and economic factors. These studies have revealed that periods of abundant rainfall, resulting from climate amelioration and/or due to seasonality: Winter vs. Summer precipitation, often coincided with the peak of socio-economic, cultural, and technological advancements in various civilizations. Conversely, abrupt climatic changes or rapid climatic changes, such as prolonged droughts, led to the destruction of irrigation systems, agricultural devastation, and widespread famines. These climatic disruptions triggered cultural adaptations, migrations, and sometimes even the collapse of entire civilizations. Climate forcing, particularly solar variability, played a primary role in repeated societal displacements, migrations, and deurbanization across different regions in the past. Additionally, the intensified El Niño-Southern Oscillation, a shift of the Indian Ocean Dipole to a strong negative state, and the southward migration of the Inter-Tropical Convergence Zone contributed to an extended period of weakened Summer Monsoons of South Asia and increased aridity. This depletion of water resources triggered the general demographic shift vis-à-vis the 4.2 ka event. The displacement was a response to a weakened Summer Monsoons of South Asia. In this research review article, we aim to understand the role of climate variability and explore the complex socio-climatological linkages in the mysterious displacement of once-thriving, highly advanced, widespread, and urbanized Harappan Civilization at the 4.2 ka.</p></div>","PeriodicalId":54488,"journal":{"name":"Review of Palaeobotany and Palynology","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142271743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Pollen atlas and morphological analysis of the selected types from southeastern Tibet, China 中国西藏东南部部分类型的花粉图谱和形态分析

IF 1.9 3区地球科学

Review of Palaeobotany and Palynology Pub Date : 2024-09-03 DOI: 10.1016/j.revpalbo.2024.105188

Qinran Gu, Limi Mao, Wei Chen

{"title":"Pollen atlas and morphological analysis of the selected types from southeastern Tibet, China","authors":"Qinran Gu, Limi Mao, Wei Chen","doi":"10.1016/j.revpalbo.2024.105188","DOIUrl":"https://doi.org/10.1016/j.revpalbo.2024.105188","url":null,"abstract":"The accuracy of fossil pollen identification is crucial for understanding past plant diversity, vegetation landscape and associated climate change, while dispersed/fossil pollen assignments heavily rely on how robust modern pollen reference is. There is high species richness in southeastern Tibet, China, however, pollen morphological studies in this area are still poorly documented. Here, we present pollen atlas of 57 species (40 genera, 22 families) collected from the Ranwu Lake Basin. Pollen grains were imaged with light microscope (LM, 100X oil-immersion objective lens) and scanning electron microscope (SEM). All pollen types are ordered and presented according to different aperture types and sculpture patterns, facilitating comparison with fossil pollen. Moreover, we selected some representative species mainly based on potential palaeoecological importance, including (Rosaceae), (Polygonaceae), (Thymelaeaceae), subsp. and (Poaceae), to discuss their pollen identification characteristics for the first time and assess potential applications in Quaternary palaeoecological interpretation. This study enriches modern pollen atlas for Quaternary pollen analysis in the study area and the adjacent regions. Our results provide robust modern reference in pollen-based reconstruction of vegetation history, palaeoclimate and palaeoenvironment, and tracing pollen signal of local human activities as well.","PeriodicalId":54488,"journal":{"name":"Review of Palaeobotany and Palynology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142259338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Cisuralian plant fossils from Khenifra (Central Morocco): Palaeoenvironmental and palaeobiogeographical reconstructions 来自 Khenifra（摩洛哥中部）的 Cisuralian 植物化石：古环境和古生物地理重建

IF 1.7 3区地球科学

Review of Palaeobotany and Palynology Pub Date : 2024-08-30 DOI: 10.1016/j.revpalbo.2024.105186

{"title":"Cisuralian plant fossils from Khenifra (Central Morocco): Palaeoenvironmental and palaeobiogeographical reconstructions","authors":"","doi":"10.1016/j.revpalbo.2024.105186","DOIUrl":"10.1016/j.revpalbo.2024.105186","url":null,"abstract":"<div><p>This study focuses on newly collected plant fossils from the Cisuralian successions of the Khenifra Basin in Central Morocco, revealing a diverse assemblage dominated by conifers, pteridosperms, and sphenophytes. The assemblage includes eleven taxa of vegetative and reproductive organs preserved as compressions and impressions. Two pteridosperm species taxa (<em>Neurodontopteris auriculata, Odontopteris subcrenulata</em>) are recorded for the first time from Central Morocco, whereas other taxa are known from the early Permian deposits of Bou Achouch and Tiddas basins. Contrary to previous interpretations, the flora is does not exhibit a mixed character, but instead exhibits a distinct Euramerican affinity, despite the absence of the widespread callipterids <em>Autunia conferta</em> and <em>A. naumannii</em>. These similarities between this flora and coeval Euramerican floras highlight the significant biogeographical connections across Pangea during the Cisuralian. The plant fossil assemblage is dominated by meso- to xerophilous species adapted to drought, with rare hygrophilous elements adapted to humid habitats, reflecting a heterogeneous landscape with various vegetation types.</p></div>","PeriodicalId":54488,"journal":{"name":"Review of Palaeobotany and Palynology","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142128811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

New pollen taxon Syncolpraedapollis angolensis nov. gen. sp. nov.: A noteworthy discovery reported in the preliminary investigation of the latest Eocene-latest Oligocene deposits in the Kwanza Basin, Angola 新的花粉分类群 Syncolpraedapollis angolensis nov：安哥拉宽扎盆地最新始新世-最新渐新世矿床初步调查中的一个值得注意的发现

IF 1.7 3区地球科学

Review of Palaeobotany and Palynology Pub Date : 2024-08-17 DOI: 10.1016/j.revpalbo.2024.105178

{"title":"New pollen taxon Syncolpraedapollis angolensis nov. gen. sp. nov.: A noteworthy discovery reported in the preliminary investigation of the latest Eocene-latest Oligocene deposits in the Kwanza Basin, Angola","authors":"","doi":"10.1016/j.revpalbo.2024.105178","DOIUrl":"10.1016/j.revpalbo.2024.105178","url":null,"abstract":"<div><p>A palynostratigraphic study of the upper Cunga and lower Quifangondo deposits in the Cabo de São Brás section, Kwanza Basin, Angola, has revealed a new pollen named <em>Syncolpraedapollis angolensis</em> nov. gen. sp. nov. This finding was part of a wider survey in the upper Cunga and lower Quifangondo deposits of the Cabo de São Brás section, Kwanza Basin, Angola, covering the latest Eocene to the latest Oligocene.</p><p>The novel pollen features unique characteristics, notably a 3-syncolporate structure with well-defined and distinctive pores. The pollen grain is adorned with a free but irregular reticulum with an irregular polygonal mesh. <em>Syncolpraedapollis angolensis</em> nov. gen. sp. nov. is sporadically but consistently observed within the latest Eocene-latest Oligocene interval, conspicuously absent in the underlying Eocene sediments (lower Cunga Formation) and occurring infrequently in the latest Oligocene sediments (lower Quifangondo Formation). Thus, it is plausible to infer a limited age range, likely restricted to the latest Eocene-latest Oligocene, as previous studies in the Kwanza Basin have not documented this pollen.</p></div>","PeriodicalId":54488,"journal":{"name":"Review of Palaeobotany and Palynology","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0034666724001295/pdfft?md5=0b230473b68ae188c3dc5f14464106a2&pid=1-s2.0-S0034666724001295-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Fossil record of Meliolaceae from India sheds new insight into its taxonomy and life cycle 印度楝科植物的化石记录为了解其分类和生命周期提供了新的视角

IF 1.7 3区地球科学

Review of Palaeobotany and Palynology Pub Date : 2024-08-17 DOI: 10.1016/j.revpalbo.2024.105177

{"title":"Fossil record of Meliolaceae from India sheds new insight into its taxonomy and life cycle","authors":"","doi":"10.1016/j.revpalbo.2024.105177","DOIUrl":"10.1016/j.revpalbo.2024.105177","url":null,"abstract":"<div><p>The asexual morph of Meliolaceae has long been a focus of attention for mycologists because there has been a lack of research to establish the asexual morph cycle of Meliolaceae. Besides asexual morph, only a few research works have also been done on the setae (mainly ascomatal setae) of Meliolaceae. In this connection, the use of reliable fossil evidence in evolutionary studies is obligatory. The present study fills this lacuna by reporting the in-situ occurrence of a new enigmatic fossil-genus and species <em>Palaeomeliola indica</em> Kundu and Khan, gen. et sp. nov. with mycelial setae, ascomata, ascomatal setae, ascomatal conoid cells, 4-septate ascospores, phialides, and phialoconidia on the cuticle fragments of a compressed disease-symptomatic monocot leaf recovered from the middle Siwalik (Late Miocene; ca. 12–8 Mya) of Himachal Pradesh, western Himalaya. <em>Palaeomeliola indica</em> is the first fossil-species of Meliolaceae having all sexual and asexual morphs. From this point of view, our new fossil fungus is very distinctive and establishes the greatest preserved fossil record of Meliolaceae. The preserved sexual and asexual morph data sheds new insight into the systematics, life cycle, and evolutionary lineages of Meliolaceae. Furthermore, the findings of this study will form the basis for any future life cycle reconstruction and morphological character evolutionary study of Meliolaceae.</p></div>","PeriodicalId":54488,"journal":{"name":"Review of Palaeobotany and Palynology","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142041026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Leaf phenology and paleoclimatic and paleoenvironmental insights derived from Yiwupitys elegans of the Yiwu Jurassic Forest, Xinjiang, China 从中国新疆伊吾侏罗纪森林中的Yiwupitys elegans得出的叶片物候以及古气候和古环境启示

IF 1.7 3区地球科学

Review of Palaeobotany and Palynology Pub Date : 2024-08-16 DOI: 10.1016/j.revpalbo.2024.105176

{"title":"Leaf phenology and paleoclimatic and paleoenvironmental insights derived from Yiwupitys elegans of the Yiwu Jurassic Forest, Xinjiang, China","authors":"","doi":"10.1016/j.revpalbo.2024.105176","DOIUrl":"10.1016/j.revpalbo.2024.105176","url":null,"abstract":"<div><p>Many permineralized conifer stems and trunks have been documented from the Jurassic strata of the Xinjiang Uygur Autonomous Region (Xinjiang), Northwest China. Xylem anatomical studies have showed that these stems and trunks belonged to a diverse range of plants. However, the leaf phenology and the paleoclimatic and paleoenvironmental significance of these fossil plants have rarely been studied. We quantitatively analyzed the anatomical characteristics of a permineralized conifer stem—<em>Yiwupitys elegans</em> Gou et Feng 2023—from the Middle Jurassic Xishanyao Formation in northeastern Xinjiang, which has distinct and wide growth rings in the secondary xylem. Analyses of the Mean Sensitivity and Ring Markedness Index of the growth rings suggest that a stable paleoclimate with regular seasonal fructifications likely prevailed during the Middle Jurassic in this area. The statistical analyses of cell diameters and anatomical features of leaf traces in six successive growth rings indicate that this fossil plant was deciduous. Our study elucidates the ecophysiological characteristics of a Middle Jurassic conifer plant and provides new insights into the corresponding paleoclimate and paleoenvironment based on quantitative cellular analysis of the fossil stem.</p></div>","PeriodicalId":54488,"journal":{"name":"Review of Palaeobotany and Palynology","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142020869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Fossil pollen data can reconstruct robust spatial patterns of biodiversity in the past 化石花粉数据可重建过去生物多样性的强大空间模式

IF 1.7 3区地球科学

Review of Palaeobotany and Palynology Pub Date : 2024-08-16 DOI: 10.1016/j.revpalbo.2024.105175

{"title":"Fossil pollen data can reconstruct robust spatial patterns of biodiversity in the past","authors":"","doi":"10.1016/j.revpalbo.2024.105175","DOIUrl":"10.1016/j.revpalbo.2024.105175","url":null,"abstract":"<div><p>Fossil pollen data are valuable for understanding past spatio-temporal variations in plant diversity. However, deducing robust patterns of fossil pollen-assemblage properties is challenging due to factors related to pollen production, dispersal, and fossilisation; sediment sampling; and nomenclature and taxonomy of the fossil pollen grains reflecting the vegetation that produced them. If the composition pattern of the most recent fossil pollen assemblage concords with those in modern or surface pollen assemblages from the same location(s), the pattern can be regarded as robust.</p><p>Using recent (50–500 years) fossil pollen and surface pollen assemblages of angiosperms compiled from the same geographic area of Central Asia, we analyse spatial patterns in compositional turnover and phylogenetic dispersion. These are widely used to quantify different aspects of plant diversity.</p><p>Despite differences in the data regarding spatial coverage, number of pollen records, and number of pollen taxa, the spatial pattern in the modern and fossil pollen-assemblage properties across climate zones is broadly similar. Especially, the latitudinal patterns of pollen-assemblage properties are strikingly similar between both data types. However, the degree of concordance varies according to the diversity metric being analysed, and the magnitudes of the metric may differ between both data types. When the data are compiled, processed, and standardised following consistent criteria and analysed using appropriate metrics and methods, spatial patterns in pollen-assemblage properties of fossil pollen data are as robust as those in surface pollen data (∼modern vegetation). Therefore, regional patterns of compositional turnover and phylogenetic dispersion can be confidently inferred from older fossil assemblages through the Holocene.</p></div>","PeriodicalId":54488,"journal":{"name":"Review of Palaeobotany and Palynology","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Composition of Paleocene forests from Antarctica based on fossil wood 基于化石木材的南极古新世森林的构成

IF 1.7 3区地球科学

Review of Palaeobotany and Palynology Pub Date : 2024-08-15 DOI: 10.1016/j.revpalbo.2024.105174

{"title":"Composition of Paleocene forests from Antarctica based on fossil wood","authors":"","doi":"10.1016/j.revpalbo.2024.105174","DOIUrl":"10.1016/j.revpalbo.2024.105174","url":null,"abstract":"<div><p>A new assemblage of fossil wood of Paleocene age from Seymour Island, Antarctic Peninsula, is described. Conifer species have been identified, belonging to the fossil genera <em>Agathoxylon</em>, <em>Phyllocladoxylon</em>, <em>Protophyllocladoxylon</em>, and <em>Podocarpoxylon.</em> Angiosperm fossil wood species are assigned to <em>Nothofagoxylon</em>, <em>Caldcluvioxylon</em>, and <em>Myrceugenellites</em>. New wood types have been described with possible affinity to Atherospermataceae and Asteraceae (daisy family). A newly identified fossil angiosperm species, <em>Aextoxicoxylon jacksius</em>, has been recorded from Antarctica for the first time. It shares traits with modern <em>Aextoxicon punctatum</em> and other <em>Aextoxicoxylon</em> wood from South America but is considered a separate species due to significant differences in vessel density, ray height, and frequency. This study indicates, in accordance with previous studies that conifers were the most common elements in the Paleocene Antarctic vegetation. In particular, <em>Agathoxylon</em> being the most dominant wood type. <em>Nothofagoxylon</em> was the most common angiosperm wood type. Overall the composition of the Antarctic Paleocene vegetation deduced from the presence of fossil wood resembles that of the modern warm to cool temperate forests of Tasmania, New Zealand and southern South America. Possible upland and lowland forest types have been identified, with the lowland forests likely most similar to the modern mixed cool temperate forests on South Island, New Zealand, and Tasmania. The upland forests were similar to the modern open canopy <em>Araucaria-Nothofagus</em> forests on the high Andes today.</p></div>","PeriodicalId":54488,"journal":{"name":"Review of Palaeobotany and Palynology","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142087591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

A microfossil-based object biogeography of a set of stocks from the Rijksmuseum in Amsterdam 基于微化石的阿姆斯特丹里克斯博物馆藏品生物地理学

IF 1.7 3区地球科学

Review of Palaeobotany and Palynology Pub Date : 2024-08-10 DOI: 10.1016/j.revpalbo.2024.105172

引用次数: 0