Article
Plant Sciences
Estrella Urtubey, Maria C. Klusch, Tod F. Stuessy
Summary: Based on molecular phylogenetic studies, Barnadesioideae are proposed to be the basal subfamily of Asteraceae. This subfamily consists of 10 genera and 87 species primarily distributed along the Andean mountains, Patagonia, and southern Brazil and Uruguay. Recent research has confirmed the placement of Schlechtendalia as the sister genus of the subfamily and provided insights into its morphology and adaptation to mesic environments.
BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
(2023)
Article
Geography, Physical
Maximilian Lorch, Jens Mutke, Maximilian Weigend, Federico Luebert
Summary: The disjunct distribution of plant clades between the southern and tropical Andes has not been well studied, with the hypothesis being that the global cooling trend in the Miocene and the concomitant aridification of certain regions played a crucial role in shaping this pattern. The climatic niches of these clades have shifted in different directions over time, rejecting the idea of niche conservatism.
GLOBAL AND PLANETARY CHANGE
(2021)
Article
Paleontology
Barbara Vento, Gabriela G. Puebla, Diego Pinzon, Mercedes Pramparo
Summary: Fossil leaves are widely used as proxies for paleoclimate estimates, with traditional leaf physiognomy analysis being a common technique. This study in southern South America utilized fossil leaves to estimate climate parameters from the Eocene-Oligocene and Oligocene-early Miocene formations, revealing differences in climate conditions between the two formations. The results showed warm and humid conditions for the Rio Turbio Formation members, while the Rio Guillermo Formation indicated a decrease in temperature and precipitation.
COMPTES RENDUS PALEVOL
(2021)
Article
Plant Sciences
Xianliang Zhu, Hui Liang, Haolong Jiang, Ming Kang, Xiao Wei, Lili Deng, Yancai Shi
Summary: This study conducted a phylogeographic analysis of the genus Heteroplexis using RADseq and found strong geographic isolation and a southward migration since the last glacial period in the karst mountains. The karst mountains serve as a refuge for Heteroplexis species, but recent genetic diversity loss is a concern.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Multidisciplinary Sciences
Susana E. Freire, Mariana A. Grossi, Nestor D. Bayon, Claudia Monti
Summary: This study provides the first morphometric analysis of North American species of Pseudognaphalium, confirming 37 species and providing a synopsis including identification key and synonymy. Lectotypes are designated for several species.
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
(2022)
Article
Meteorology & Atmospheric Sciences
Solange Suli, David Barriopedro, Ricardo Garcia-Herrera, Matilde Rusticucci
Summary: This study describes the climatological characteristics of regional heat waves (HWs) over southern South America (SSA) for the warm seasons of 1979-2018. It identifies regional HW events in five homogeneous regions based on clustering of stations with high co-occurrence of simultaneous HW days. The analysis reveals differences in duration, intensity, and extension of HWs among the regions, with the southernmost region exhibiting the most severe HWs. Long-term assessments indicate significant increases in the frequency of regional HW days over central Argentina and central Chile, and the severity of HWs has increased only in the southernmost region.
WEATHER AND CLIMATE EXTREMES
(2023)
Article
Plant Sciences
Wen-Qu Fei, You-Pai Zeng, Qin-Er Yang
Summary: In this study, the morphology and chromosome number of Sinosenecio qii (Asteraceae, Senecioneae) were examined from a plant collected in Jianghua county, southern Hunan province, China. The results showed that S. qii is related to S. globiger but differs in stem morphology, leaf distribution, and number of ray florets.
Article
Plant Sciences
Ming Tang, Chen Ren, You-Sheng Chen, Qin-Er Yang
Summary: A new species of Asteraceae, Senecioneae called Synotis nyalamensis, was discovered in Nyalam county, southern Xizang (Tibet), China. It closely resembles S. kunthiana but has distinct differences in stature, stem quantity, leaf tips, leaf nerves, and number of disk florets.
Article
Geosciences, Multidisciplinary
Pedro Pinero, A. Itati Olivares, Diego H. Verzi, Victor H. Contreras
Summary: The discovery of the new genus Paralonchothrix gen. nov. provides new insights into the evolutionary pattern of echimyids recorded at high latitudes since the late Miocene, showing an association with living Amazonian arboreal clades. This finding also supports the hypothesis that northwestern Argentina maintained connections with tropical biomes of northern South America during the late Miocene.
EARTH AND ENVIRONMENTAL SCIENCE TRANSACTIONS OF THE ROYAL SOCIETY OF EDINBURGH
(2021)
Article
Multidisciplinary Sciences
Huseyin Dural, Burcu Yilmaz Citak
Summary: This study examined the morphology, anatomy, and palynomorphology of Centaurea lycaonica, an endemic species in Turkey. The evaluation of anatomical characteristics and descriptions of pollen grains and achenes provide valuable information for distinguishing this rare species. The study highlights the taxonomical importance of certain morphological properties for this endemic plant.
COMPTES RENDUS DE L ACADEMIE BULGARE DES SCIENCES
(2021)
Article
Biochemistry & Molecular Biology
Caifei Zhang, Chien-Hsun Huang, Mian Liu, Yi Hu, Jose L. Panero, Federico Luebert, Tiangang Gao, Hong Ma
Summary: By using phylotranscriptomic analyses on 244 transcriptomes and genomes of the sunflower family, this study provides insights into the distribution, origin, and evolution of biodiversity within the Asteraceae family. The results suggest that global climate shifts, whole-genome duplications, and morphological evolution have all played key roles in shaping the diversity of the Asteraceae family.
JOURNAL OF INTEGRATIVE PLANT BIOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Elizabeth DiGangi, Jeff Lapierre, Michael Stock, Mark Hoekzema, Bruno Cunha
Summary: This study analyzes the geographic variation of lightning characteristics using data from the Earth Networks Total Lightning Network. The results show significant differences in lightning characteristics in different regions, such as higher average peak current in Northern Argentina and a localized minimum in a specific region North of S??o Paulo, Brazil. The study also observes a higher proportion of positive cloud-to-ground lightning in Central and Northern Argentina compared to conventional thunderstorms.
ELECTRIC POWER SYSTEMS RESEARCH
(2022)
Review
Plant Sciences
Andres Moreira-Munoz, Maria Virginia Palchetti, Vanezza Morales-Fierro, Valeria Soledad Duval, Rudy Allesch-Villalobos, Carlos E. Gonzalez-Orozco
Summary: Substantial advances are needed in taxonomic, systematic, and distribution knowledge of plants and in the transmission of this information to society. The diversity patterns of the Solanaceae family in southern South America reveal the need for a geographically explicit conservation strategy to protect its richness and endemism.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Nathan A. Jud, Maria A. Gandolfo
Summary: Cunoniaceae are woody plants with a complex history of distribution, dispersal, diversification, and extinction. Fossil flowers from the early Palaeocene have provided new information about the evolution of Cunoniaceae, indicating that the diversification of crown-group Cunoniaceae was already underway by 64 million years ago.
Article
Environmental Sciences
Daniela B. Risaro, Maria Paz Chidichimo, Alberto R. Piola
Summary: This study examines the interannual variability and trends of sea surface temperature (SST) around southern South America from 1982 to 2017. The research finds that there is a warming trend in the mid-latitude regions of the eastern South Pacific and western South Atlantic, while the region around southern South America shows a cooling trend. Additionally, two areas on the Patagonian Shelf exhibit statistically significant warming and cooling trends in SST anomalies. The results suggest that these SSTa trends are largely associated with the variability observed in the past decade.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Plant Sciences
Viviana D. Barreda, Luis Palazzesi, Eduardo B. Olivero
Article
Plant Sciences
Maria C. Telleria, Viviana D. Barreda, Luis Palazzesi
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2019)
Article
Plant Sciences
Susanne S. Renner, Viviana D. Barreda, Maria Cristina Telleria, Luis Palazzesi, Tanja M. Schuster
Article
Biology
Damian A. Fernandez, Luis Palazzesi, M. Sol Gonzalez Estebenet, M. Cristina Telleria, Viviana D. Barreda
Summary: A research on the flora of southern Patagonia during the mid-late Eocene shows that the diversity of plant communities during the MECO period was on average 40% higher than in non-MECO periods, possibly due to the favorable combination of neotropical migrants with Gondwanan species in response to higher atmospheric CO2 concentrations and increasing temperatures.
COMMUNICATIONS BIOLOGY
(2021)
Article
Plant Sciences
Carolina M. Siniscalchi, Oriane Hidalgo, Luis Palazzesi, Jaume Pellicer, Lisa Pokorny, Olivier Maurin, Ilia J. Leitch, Felix Forest, William J. Baker, Jennifer R. Mandel
Summary: Data generated using the family-specific Compositae1061 probe set and the universal Angiosperms353 probe set can be merged for downstream analyses, with 30 shared loci allowing for the combination of data generated in different ways, facilitating collaborative efforts and shared data within the synantherological community.
APPLICATIONS IN PLANT SCIENCES
(2021)
Editorial Material
Geosciences, Multidisciplinary
Luis Palazzesi, Sergio F. Vizcaino, Viviana D. Barreda
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Luis Palazzesi, Sergio F. Vizcaino, Viviana D. Barreda, Jose Cuitino, Claudia J. del Rio, Francisco Goin, M. Sol Gonzalez Estebenet, M. Veronica Guler, Maria Alejandra Gandolfo, Richard Kay, Ana Parras, Marcelo A. Reguero, Maria del Carmen Zamaloa
Summary: The research revised selected fossil records from the last 66 million years in order to understand the early evolution of the Patagonian ecosystems. It shows that the changes in terrestrial and marine biotas in the region were closely related to global climate change, ultimately leading to the formation of the modern Patagonian Steppe.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2021)
Article
Plant Sciences
Phillip E. Jardine, Luis Palazzesi, M. Cristina Telleria, Viviana D. Barreda
Summary: Morphological diversity is an important component of biodiversity and understanding the evolutionary history and morphological evolution of plants. The morphospace of Asterales pollen is phylogenetically structured, but there is no significant difference in disparity among different taxonomic groups. Additionally, there is mixed evidence for whole-genome duplication driving the morphological evolution of Asterales pollen.
Article
Multidisciplinary Sciences
Luis Palazzesi, Oriane Hidalgo, Viviana D. Barreda, Felix Forest, Sebastian Hoehna
Summary: This study explores the relationship between past atmospheric CO2 and temperature fluctuations and the diversification rate changes in grasses and daisies, two species-rich grassland families. The results indicate a simultaneous increase in diversification rates for both groups after a significant reduction in atmospheric CO2, but no significant relationship with paleo-temperatures.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Mariano Tapia, Ezequiel D. Farrell, Lilia Mautino, Cecilia del Papa, Viviana Barreda, Luis Palazzesi
Summary: The Puna region in the southern Central Andes had a different vegetation cover during the middle Eocene, with a vegetated pond surrounded by trees, vines, and palms. Most of the discovered species became extinct following the Andean uplift and climate deterioration during the Neogene. This study provides further understanding of the biotic components in the region.
Article
Paleontology
Sabrina N. Fuentes, Jose Cuitino, Paula Martz, Juan P. Perez Panera, Veronica Guler, Luis Palazzesi, Viviana D. Barreda, Roberto A. Scasso
Article
Plant Sciences
Gar W. Rothwell, Ruth A. Stockey
Summary: This study utilizes anatomical analysis of fossils from Vancouver Island, Canada, to support the development of a whole plant concept for the Eocene species of Gleichenia and provide data for the first organismal concept of an extinct species of Gleichenia from the Cenozoic fossil record. The findings suggest that the characteristics of the Gleicheniaceae family were present during the Cretaceous and Paleogene periods, with modern species well-established and diversifying.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Kathrin Ganz, Cesar Morales-Molino, Erika Gobet, Dmytro Kiosak, Nadezhda Kotova, Jacqueline van Leeuwen, Sergey Makhortykh, Christoph Schworer, Willy Tinner
Summary: This study presents a palaeoecological reinvestigation from the Kardashynskyi mire in southern Ukraine, reconstructing the vegetation dynamics, fire history, and land use for the past 8300 years. The results show that both climate and human activities have driven the vegetation changes, and the remaining special vegetation types are severely threatened under current conditions.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Willem O. van der Knaap, Bas van Geel, Jacqueline F. N. van Leeuwen, Frans Roescher, Dick Mol
Summary: Pollen analysis of fossilized teeth from a giant deer found in The Netherlands provides insights into the diet, landscape, and climate of the specimen. The study suggests that the giant deer most likely lived during the early Eemian or an early Weichselian interstadial.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Yun Guo, Yu Zhou, Josef Psenicka, Jiri Bek, Jana Votockova Frojdova, Zhuo Feng
Summary: A new species of adpressed leptosporangiate fern, Szea yunnanensis sp. nov., is described from Yunnan Province, Southwest China. The fronds of this new species have unique characteristics such as fertile pinnules with triangular to falcate shape and abaxial sori arranged in one row on each side of the midvein.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Adele C. M. Julier, Glynis J. Humphrey, Caitlin Dixon, Lindsey Gillson
Summary: The relationships between woody vegetation cover and fire, climate, herbivory, and human activities in African savanna ecosystems are complex. Fire suppression policies implemented in a national park in northeast Namibia from 1888 to 2005 did not lead to noticeable decreases in fire or enhanced tree recruitment, suggesting that fire occurrence in savanna ecosystems is more closely linked to climate than management. Fire management should adapt to rainfall variability and integrate customs of early dry season burning.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Milan Libertin, Jiri Kvacek, Jiri Bek
Summary: This paper revises the genus Aberlemnia from the Early Devonian of Scotland based on its type-material A. caledonica and describes a new species, Aberlemnia krizii sp. nov, from the Silurian of Czechia. The study provides detailed diagnoses and highlights the differences between the two species. Aberlemnia is positioned on an evolutionary clade line leading to the Lycophytina.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)