Results 41 to 50 of about 39,574 (242)

Late Holocene climate and environmental changes in Kamchatka inferred from subfossil chironomid record. [PDF]

, 2013
This study presents a reconstruction of the Late Holocene climate in Kamchatka based on chironomid remains from a 332 cm long composite sediment core recovered from Dvuyurtochnoe Lake (Two-Yurts Lake, TYL) in central Kamchatka.
de Hoog, Verena, Diekmann, Bernhard, Dirksen, Oleg, Hoff, Ulrike, Nazarova, Larisa   +4 more
core   +1 more source

Pollen-YOLO: A Deep Learning Framework for Automated Pollen Identification and Its Application to Palaeoecological Reconstruction on the Tibetan Plateau

Quaternary
Automated pollen identification has become an increasingly important tool for palaeoecological research; however, its application to fossil pollen assemblages remains challenging due to complex backgrounds, morphological variability, and taxonomic ...
Xuan Shi, Guangliang Hou, Fubo Wang, Hongyu Li   +3 more
doaj   +1 more source

Comparative performance of airyscan and structured illumination superresolution microscopy in the study of the surface texture and 3D shape of pollen

, 2018
The visualization of taxonomically diagnostic features of individual pollen grains can be a challenge for many ecologically and phylogenetically important pollen types.
Allen, Andersen, Anderson, Chaturvedi, Dan, Faegri, Gustafsson, Gustafsson, Habuchi, Han, Heintzmann, Hesse, Holt, Huang, Jost, Kasuboski, Leung, Long, Lukosz, Mander, Mander, Mander, Muller, Nelson, Page, Peltre, Punt, Punyasena, Reimer, Sheppard, Sivaguru, Sivaguru, Sun, Tcheng, Traverse, Urban, Urban, Urban, Weiss   +38 more
core   +1 more source

Origin and Early Evolution of Hydrocharitaceae and the Ancestral Role of Stratiotes

Plants
The combined morphological features of Stratiotes (Hydrocharitaceae) pollen, observed with light and electron microscopy, make it unique among all angiosperm pollen types and easy to identify.
Silvia Ulrich, Manuel Vieira, Mario Coiro, Johannes M. Bouchal, Christian Geier, Bonnie F. Jacobs, Ellen D. Currano, Olaf K. Lenz, Volker Wilde, Reinhard Zetter, Friðgeir Grímsson   +10 more
doaj   +1 more source

Vegetation Reconstruction From Siberia and the Tibetan Plateau Using Modern Analogue Technique–Comparing Sedimentary (Ancient) DNA and Pollen Data

Frontiers in Ecology and Evolution, 2021
To reconstruct past vegetation from pollen or, more recently, lake sedimentary DNA (sedDNA) data is a common goal in palaeoecology. To overcome the bias of a researcher’s subjective assessment and to assign past assemblages to modern vegetation types ...
Sisi Liu, Sisi Liu, Kai Li, Kai Li, Weihan Jia, Kathleen Rosmarie Stoof-Leichsenring, Xingqi Liu, Xianyong Cao, Ulrike Herzschuh, Ulrike Herzschuh, Ulrike Herzschuh   +10 more
doaj   +1 more source

Origin of subgenomes in the circumboreal, allopolyploid, carnivorous plant Drosera anglica

American Journal of Botany, EarlyView.
Abstract Premise The parentage of the widespread allopolyploid Drosera anglica, a member of the carnivorous sundew genus, remains uncertain despite over 100 years of morphological, cytological, and, more recently, molecular study. Methods Using transcriptomic and genomic data from 12 species of Drosera sect. Drosera, including four D.
Rebekah A. Mohn, Ya Yang
wiley   +1 more source

The Nossa Senhora da Luz flora from the Early Cretaceous (early Aptian-late Albian) of Juncal in the western Portuguese Basin

Acta Palaeobotanica, 2018
A new fossil flora is described from the Early Cretaceous of the western Portuguese Basin, based on a combined palynological-mesofossil study. The fossil specimens were extracted from samples collected in the Nossa Senhora da Luz opencast clay pit ...
MÁRIO MIGUEL MENDES, ELSE MARIE FRIIS
doaj   +1 more source

Anthropogenic pollen indicators: Global food plants and Latin American human indicators in the pollen record

Scientific Data, 2023
Pollen-based evidence of human presence is crucial for reconstructing human history. However, information on the morphology of pollen grains of global food plants and regional pollen-based human indicators is scattered in the literature, leading to the ...
Suzette G. A. Flantua, Henry Hooghiemstra   +1 more
doaj   +1 more source

An investigation into differential lateral dispersion of fossil forest tree pollen [PDF]

, 1974
Pollen rain phenomena with particular reference to forest pollen are discussed with evidence from FAEGRI.K and IVERSON.J, TAUBER.H, TURNER.J, and DAVIS .M. B. The existence of fossil tree pollen rain in raised bogs is postulated. The problem of local bog
PARKIN, M. J.
core  

Angiosperm pollen grains from the Cuayuca Formation (Late Eocene to Early Oligocene), Puebla, Mexico [PDF]

, 2015
Systematic descriptions and illustrations of the best preserved angiosperm pollen grains (Monocotyledonae or Liliopsida: n= 7 and Dicotyledonae or Magnoliopsida: n= 41) recovered from Cuayuca Formation (late Eocene-early Oligocene), Puebla State ...
Martínez Hernández, Enrique, Pramparo, Mercedes Beatriz, Ramirez Arriaga, Elia   +2 more
core   +1 more source