Andre Jasper

Andre Jasper
Universidade do Vale do Taquari - UNIVATES · Life Sciences

Professor (Full)
Looking for fossil plants and palaeo-wildfires through deep time...

About

158
Publications
55,700
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,634
Citations
Citations since 2017
62 Research Items
1028 Citations
2017201820192020202120222023050100150200250
2017201820192020202120222023050100150200250
2017201820192020202120222023050100150200250
2017201820192020202120222023050100150200250
Introduction
My research is focused on the Late Palaeozoic/Early Mesozoic Gondwanan palaeofloras and palaeoenvironments. Palaeo-wildfires (charcoal study) significance on the genesis and evolution of biomes is also a main discussion point of my research.
Additional affiliations
August 1995 - January 2017
Universidade do Vale do Taquari - UNIVATES
Position
  • Professor (Full)
August 1995 - present
Universidade do Vale do Taquari - UNIVATES
Position
  • Professor (Full)
Description
  • Titular Professor in in Palaeobotany and Biomes Evolution.
Education
August 2004
Universidade Federal do Rio Grande do Sul
Field of study
  • Geosciences - Paleontology

Publications

Publications (158)
Article
Charcoal, a common product of wildfire, is abundant in many sedimentary rocks deposited in a wide range of environments, from terrestrial to marine. The analysis of paleofloras and the related palaeoecological conditions is of great importance for the understanding of past environmental and palaeoclimatic events. Woody charcoal is identified from t...
Article
This study deals with lycopsid axes from Cisuralian strata of the São Sepé outcrop in southern Brazil, belonging to the Glossopteris flora. Their gross morphology is described using standard palaeobotanical techniques. They lack cuticles, but the description is complemented using vinyl polysiloxane replicas of their leaf cushions, which reveal impr...
Article
The monotypic Azaniadendron fertile Rayner, a lycopsid from the Guadalupian of Gondwana, is investigated providing new data on the morphology of its leaf cushions and their variation in shape. Evidence for a ligule is presented for the first time, elucidating, at least for this genus, a dilemma about the presence of this structure in lycopsids from...
Article
Full-text available
A Bacia do Araripe é conhecida mundialmente por sua diversidade de fósseis em excelente estado de conservação, que registram a fauna e a flora do Paleozoico ao Mesozoico, depositados durante milhões de anos. A vasta literatura sobre a bacia é concentrada em sua maioria sobre o Mesozoico, com especial interesse ao Grupo Santana, cujo estratos aflora...
Article
The freshwater diatomite deposits from Saint-Bauzile in the Ardèche (France) represent a first-class Fossil-Lagerstätte of late Miocene, i.e., Tortonian age. A large variety of different animals (i.e., insects, fishes, and mammals) and macro-plants as well as palynomorphs and lacustrine diatoms are known from this locality, in generally excellent p...
Article
Full-text available
The main objective of this study was to develop a methodology to evaluate, by physical and chemical methods, artificially charred logs from three species of Araucariaceae, and compare them fossil charcoal collected in the Faxinal and Belvedere outcrops for possible paleoenvironmental inferences. The species studied were Araucaria angustifolia, Arau...
Article
Fossil evidence for wildfires, in form of fossil charcoal, is known from a large number of Cretaceous localities worldwide and it has repeatedly been argued that wildfires were connected to the evolution and radiation of angiosperms during this period. The present study provides new evidence (in form of macro-charcoal) for the occurrence of wildfires...
Article
Full-text available
Macroscopic fossil charcoal fragments have been recovered from the borehole AK-19 (at a depth of 120.00 m) drilled at the Astona-Kothurna coal block, Wardha valley coalfield. In general, the occurrence of charcoal in sediments is accepted as a direct indicator for palaeo-wildfires. The charcoal fragments exhibits well preserved homogenized cell wal...
Article
Full-text available
The record of Cretaceous palaeo-wildfires is rather scarce for peninsular India. We aim to report a detailed macro-charcoal analysis as evidence for palaeo wildfires of Early Cretaceous deposits from India. The macro-charcoal was studied using SEM and classified into three morphotypes based on anatomical characteristics. All morphotypes are probabl...
Article
Full-text available
Charcoal remains and bulk lignites collected from the late Pliocene Jinsuo Basin in Yunnan, southwestern China, have been studied to reveal changes in the wildfire regime related to changes of the palaeoenvironment, palaeoclimate, and paleobotany. Different types of wildfire occurred in this paleomire with a predominance of low-temperature surface...
Article
Full-text available
The Cerro Chato outcrop, Dom Pedrito municipality, Rio Grande do Sul (Brazil), represents an important fossil site for the understanding of the environmental changes that occurred throughout the end of the Paleozoic, culminating in the largest extinction event recorded thus far. The sedimentary beds of the Cerro Chato outcrop yield a unique fossil...
Article
Macro-charcoal from late Eocene–late Oligocene deposits of the Neuwied Basin in W-Germany provides evidence for the occurrence of palaeo-wildfires in three different time-slices in this region. (Par-)Autochthonous macro-charcoal from lignites of the late Eocene Bubenheim Formation of the locality Koblenz-Metternich can best be compared to the genus...
Article
Full-text available
The Cretaceous “high-fire” period was a global event that reached almost all continental masses during that period in Earth’s history. The extensive wildfires directly affected plant communities. Significant palaeobotanical records in the Antarctic Peninsula have been studied from the James Ross Sub-Basin, especially from the Santa Marta Formation....
Article
Full-text available
Journal of Palaeosciences (previously: The Palaeobotanist) 70(2021): 159–171 Fire is a major driver for the evolution of biodiversity throughout the Phanerozoic and occurs in continental palaeoenvironments since the advent of the first land plants in the Silurian. The detection of palaeo–wildfire events can be based on different proxies, and charc...
Article
Full-text available
The main objective of this study was to develop a methodology to evaluate, by physical and chemical methods, artificially charred logs from three species of Araucariaceae, and compare them fossil charcoal collected in the Faxinal and Belvedere outcrops for possible paleoenvironmental inferences. The species studied were Araucaria angustifolia, Arau...
Chapter
We summarize here the glossopterid record for the late Paleozoic of southernmost Paraná Basin from the Kazimovian–Gzhelian through the Roadian, a time interval spanning ca. 30 Ma. Isolated and clustered leaves are the dominant fossils; reproductive organs, conductive tissues (Agathoxylon-type wood), and Vertebraria roots were less frequently descri...
Article
Full-text available
Wildfires occurred more or less regularly in many Pennsylvanian ecosystems, not only in seasonally dry regions but also in the ever wet tropics. One of the reasons for this was probably the relatively high atmospheric oxygen conditions prevailing during this period. The present study reports evidence for the occurrence of wildfires during depositio...
Article
A new fossil taxon, Iratinia australis gen. nov. et. sp. nov., is proposed based on a monoxylic anatomically preserved axis from the Irati Formation, Kungurian of the Paraná Basin, Brazil. This specimen was initially interpreted as a lycopsid, but its set of morpho-anatomical characteristics indicate that it has systematic affinity with Cycadales....
Chapter
Extant lycopsids are small, mostly herbaceous plants, but during the Paleozoic, taxa of this lineage reached arborescent growth habits. Here we provide a glimpse into the lycopsid fossils from the Permian of Brazil. In this country, these plants have been reported from the Permian strata of the Parnaíba and Paraná basins. The Permian lycopsid fossi...
Article
Full-text available
Os biomas são essenciais para o equilíbrio ambiental e à sobrevivência de populações humanas. Para a perpetuação da vida nos biomas, é necessário o estabelecimento de políticas públicas ambientais. Para que esta gestão seja sustentável é necessário realizar planejamentos e implementar legislações adequadas às características do município e que regr...
Article
Full-text available
The late Paleocene fossil lagerstätte Menat in France is well known for its wealth of excellently preserved fossil plants and insects. Although the flora from this locality is regarded as characteristic for the late Thanetian in Western and Central Europe, there is a noteworthy lack of modern paleobotanical studies on this locality. The few existin...
Article
The Permian period had the most oxygen-rich atmosphere in Earth's history. With the presence of large amounts of fuel from vegetation, there was therefore a high probability of igniting fires during this time. This study presents the geochemical characterization of charcoal-bearing Asselian sediments, represented by terrestrial to lagoonal facies,...
Chapter
The assembly of the supercontinent Pangea resulted in a paleoequatorial region known as Euramerica, a northern mid-to-high latitude region called Angara, and a southern high paleolatitudinal region named Gondwana. Forested peat swamps, extending over hundreds of thousands of square kilometers, grew across this supercontinent during the Mississippia...
Chapter
A walk in the Carboniferous-and-Permian woods of the Late Paleozoic, a time known as the Late Paleozoic Ice Age (LPIA), would not be a walk in the woods comparable to today’s Holocene forests. The vegetation that colonized and inhabited the landscapes during glacial and interglacial episodes are non-analogs with the world we witness around us. Unli...
Article
Full-text available
A variety of traces of pre-charring decay are described from coniferous charcoals from the Norken locality, stratigraphically positioned within the Breitscheid Formation (Late Oligocene, Chattian) of the West-erwald area (Rhineland-Palatinate; W Germany). The traces include three-dimensionally preserved as well as collapsed fungal hyphae, collapsed...
Article
Full-text available
Riparian forest, an Area of Permanent Preservation, has suffered anthropic pressure for decades, which makes its recovery imperative. To preserve it, the Constitution has established the responsibility of the Public Prosecutor's Office to ensure diffuse environmental rights. Therefore, under the 1965 Forest Code, the Program for the Sustainable Dev...
Article
Lycopsids evolved arborescent and sub-arborescent growth habits and played a major paleoecological role during the late Palaeozoic. Here we provide an overview of lycopsid macrofossils documented so far in the late Palaeozoic deposits of the South American Paraná Basin. Most of these lycopsid remains were reported from the Brazilian part of the bas...
Article
Full-text available
CHEMICAL EVALUATION OF Araucaria columnaris CARBONIZED WOODS UNDER DIVERSE OXYGEN CONCENTRATIONS AS COMPARATIVE ANALYSIS OF FOSSIL charcoal. In the face of environmental changes concerns, the study of climate change becomes essential to understand the life trajectory of planet earth. For this purpose, this work seeks to understand climate change an...
Article
The taxon Paradoxopteris stromeri Hirmer, representing the rachis/petiole/stem of the fern Weichselia reticulata (Stokes et Webb) Fontaine, has a widespread occurrence in the Early–early Late Cretaceous of Northern Africa and the Near East, Europe, as well as South America. Here a new record of this taxon is presented from Cenomanian deposits at Ge...
Article
The taxon Paradoxopteris stromeri Hirmer, representing the rachis/petiole/stem of the fern Weichselia reticulata (Stokes et Webb) Fontaine, has a widespread occurrence in the Early–early Late Cretaceous of Northern Africa and the Near East, Europe, as well as South America. Here a new record of this taxon is presented from Cenomanian deposits at Ge...
Article
Full-text available
The Upper Cretaceous (early Cenomanian) Bahariya Formation of Egypt has an outstanding reputation for its wealth of vertebrate remains, including a variety of iconic dinosaurs, like the carnivorous Spinosaurus and Carcharodontosaurus, as well as the herbivorous Aegyptosaurus and Paralititan. Besides these dinosaur fossils, the Bahariya Formation yi...
Article
Full-text available
O Monumento Natural das Árvores Fossilizadas do Tocantins (MNAFTO), localizado no município de Filadélfia, estado do Tocantins, situado em parte da Amazônia Legal Brasileira, foi objeto de pesquisa para análise da influência do nível de escolaridade no processo de percepção ambiental da população local sobre esse tipo de unidade de conservação. Des...
Article
Full-text available
A new fossil meso-flora consisting of dispersed cuticles has been discovered within the Upper Member of the Middle Triassic (late Anisian) Mukheiris Formation at the eastern rim of the Dead Sea in Jordan. The assemblage consists of a number of different morpho-types of cuticles which can all be assigned to gymnosperms. Cuticles which can be identif...
Article
The fossil record contains abundant evidence for the activity of microorganisms in the form of characteristic decay structures within fossil plant remains. Despite an abundance of charcoal in many sedimentary environments, there is little published evidence of such decay structures within charcoal from pre-Quaternary clastic deposits. The present c...
Article
Fossil charcoal is usually considered as the most reliable tool for the recognition of palaeo-wildfires. In the present communication, we provide the first detailed description of macro-charcoal from the Itararé Group, Paraná Basin, Brazil. These fragments were transported prior to final deposition and only limited anatomical details are recognizab...
Article
Full-text available
Distribution and abundance of charcoal in coal seams (in form of pyrogenic macerals of the inertinites group) have been considered as a reliable tool to interpret the local and regional palaeo-wildfire regimes in peat-forming depositional environments. Although the occurrence of inertinites is globally well documented for the Late Palaeozoic, the d...
Data
Published records of charcoal in Lower Permian. Data based on [1,2,3,4], and additional sources not mentioned in these previous compilations. (DOCX)
Data
Maceral content of the six carbonaceous levels of the Barro Branco coal seam studied site. (DOCX)
Data
Published records of inertinites in Lower Permian coals. Data based on [1,2,3,4,5], and additional sources not mentioned in these previous compilations. (DOCX)
Article
Reports on Cretaceous charcoals are relatively common on a global scale and have been increasing in recent years. Fossil charcoal from the Early Cretaceous mostly belongs to conifers (and other gymnosperms) and ferns whereas angiosperms become more common only during the Late Cretaceous. However, so far, reports of Cretaceous acroscopic charcoal a...
Article
Well preserved palynomorphs from the Barakar Formation of Dhanpuri Open Cast Mine, Sohagpur Coalfield, Shahdol District, Madhya Pradesh are reported for the first time. The palynomorphs include megaspores and spores/pollen grains. Dispersed megaspores are represented by 6 genera and 13 species comprising Banksisporites indicus, B. utkalensis, Banks...
Article
Well preserved palynomorphs from the Barakar Formation of Dhanpuri Open Cast Mine, Sohagpur Coalfield, Shahdol District, Madhya Pradesh are reported for the first time. The palynomorphs include megaspores and spores/pollen grains. Dispersed megaspores are represented by 6 genera and 13 species comprising Banksisporites indicus, B. utkalensis, Banks...
Article
Full-text available
Fire is an important constituent of many modern and fossil ecosystems. During the last decades a large number of studies have dealt with fires in pre-Cenozoic ecosystems. Evidence for the occurrence of Palaeogene and Neogene wildfires (e.g. in the form of pyrogenic inertinites in lignite deposits) is geographically and stratigraphically widespread....
Article
Full-text available
Agnihotri D, Pillai SSK, Aggarwal N, Tewari R, Jasper A & Uhl D 2018. Palynomorphs from the Barakar Formation of Dhanpuri Open Cast Mine, Sohagpur Coalfield, Madhya Pradesh. The Palaeobotanist 67(2): 171-184. Well preserved palynomorphs from the Barakar Formation of Dhanpuri Open Cast Mine, Sohagpur Coalfield, Shahdol District, Madhya Pradesh are r...
Article
Full-text available
O fogo é constantemente apontado como uma ameaça à preservação ambiental devido ao seu poder de degradação. Entretanto, ao longo das últimas décadas, pontos positivos da ocorrência de incêndios vegetacionais têm sido apresentados para alguns ecossistemas ao redor do mundo. No contexto de evolução de biomas terrestres ao longo do tempo, o fogo pode...
Article
Full-text available
A arborização possui importante função na conservação da biodiversidade e adequação do espaço urbano. Porém a sua implantação nem sempre é pensada e executada levando em conta aspectos ecológicos e estruturais das plantas utilizadas, o que pode gerar problemas vinculados à manutenção e manejo. Para propor ações de intervenção é necessário avaliar a...
Article
Full-text available
Charcoal is widely accepted as evidence of the occurrence of palaeo-wild re. Although fossil charcoal remains have been used in many studies, investigation into the anatomical changes occurring during charring are few. e present study analyses changes in selected anatomical characters during artii cial charring of modern wood of three species of th...
Article
Full-text available
Anthracological studies aim at the reconstruction of the paleoenvironment through the analysis and interpretation of macroremains of carbonized woods found in soils and archaeological sites that are related to previous human activities. The objective of this study was to compare the anthrocological and taphonomic data of the Archaeological Sites RS...
Article
Arborescent and sub-arborescent lycopsids are important floristic elements of the Brazilian early Permian post-glacial environments. However, the taxonomy and systematic position as well as the biology and ecology of these plants are poorly understood. The present study describes a remarkable assemblage of Brasilodendron cf. pedroanum axes preserve...
Article
This first report of wildfires from an association of facies containing a Dicroidium flora is made from the Up- per Triassic (Carnian age) in the southern part of the Paraná Basin (Santa Maria Supersequence, Rio Grande do Sul state). The geographical extension of the Dicroidium plant assemblage is augmented in Brazilian Gondwana. Field work followe...
Article
Full-text available
The reconstruction of past environments has been studied in several areas of science, aiming to help in understanding the several events that occurred on the planet. Plants are considered environmental markers and usually show structural adaptations that are characteristic of their habitat. Therefore, after passing through the charring process, the...
Article
Full-text available
As análises arqueobotânicas compreendem uma vasta gama de atividades, sendo que dentre elas, o estudo de fragmentos de lenhos carbonizados é uma ferramenta importante para os estudos paleoambientais. Para entender o ambiente pretérito é importante conhecer a vegetação atual para reconstituir, fidedignamente, os paleoambientes. Dessa forma este trab...
Article
Full-text available
Macro-charcoal, as direct evidence of palaeo-wildfires, is a common constituent throughout an Early Permian (Cisuralian) inertinite-rich coal seam from the Dhanpuri Coal Mine (Barakar Formation, Sohagpur Coalfield, Madhya Pradesh, India). The continuous presence of macro- charcoal within this particular seam demonstrates that fires occurred repeate...
Article
Full-text available
Anthracological studies aim at the reconstruction of the paleoenvironment through the analysis and interpretation of macroremains of carbonized woods found in soils and archaeological sites that are related to previous human activities. The objective of this study was to compare the anthrocological and taphonomic data of the Archaeological Sites RS...
Article
Full-text available
The aim of the study is to evaluate the physical and chemical changes that occur on wood fragments submitted to different temperatures, verifying their influence on significant chemical characteristics in the forming process. Carbonization process in muffle associated to the techniques of Thermogravimetry, Fourier Transform Infrared Spectroscopy (F...
Article
Full-text available
O presente estudo avaliou a percepção ambiental de um grupo de doze atores sociais em relação à Unidade de Conservação denominada Monumento Natural das Árvores Fossilizadas do Tocantins (MNAFTO), localizado na cidade de Filadélfia-Tocantins-Brasil. Como metodologia, utilizou-se de pesquisa qualitativa através do método survey, com a aplicação de en...
Article
Full-text available
A fossil angiosperm wood from the Touro Passo Formation (Pleistocene) in the northwestern part of Rio Grande do Sul State, Brazil, is described as the new fossil-taxon Itaquixylon heterogenum BENICIO, PIRES, DA ROSA, SPIEKERMANN, UHL et JASPER gen. nov. et sp. nov. The fossil wood is silicified, and is 9.9 cm in diameter and 16.6 cm in length, with...
Article
Full-text available
New discoveries of fossil plant macroremains from the Remigiusberg Formation (lowermost Rotliegend group) considerably enlarge our knowledge about the flora of the basal-most part of the lithostratigraphically defined Rotliegend group within the Saar-Nahe Basin in SW-Germany. Most taxa are plants that grew in relatively humid habitats near rivers,...
Article
Full-text available
Carvão vegetal macroscópico é amplamente aceito como um indicador direto da ocorrência de paleo-incêndios vegetacionais, sendo relativamente bem estudado e distribuído de forma homogênea em depósitos do Paleozoico Superior da Euramérica e Cataísia. Por outro lado, apenas alguns registros deste tipo de material foram publicados para o Paleozoico Sup...
Article
Full-text available
Apresenta-se aqui uma síntese da composição da paleoflora preservada em siltitos argilosos do Membro Siderópolis, Formação Rio Bonito tendo como objetivo estabelecer comparações fitoestratigráficas com outras paleofloras neopensilvanianas e cisuralianas da Bacia do Paraná. A Formação Rio Bonito, a mais importante das unidades litoestratigráficas po...
Article
Full-text available
RESUMO O objetivo deste estudo foi identificar a ocorrência de carvão vegetal macroscópico na turfeira de Águas Claras, município de Viamão, no extremo sul do Brasil (incluído no cinturão temperado-tropical) como evidência direta de incêndios na planície costeira sul durante o Quaternário, na tentativa de estabelecer se causas climáticas e / ou ant...