Results 191 to 200 of about 293,429 (371)

Pleistocene habitats for proboscideans from five sites in the Japanese archipelago: Insights from isotopic composition of tooth enamel and dentin collagen

Journal of Quaternary Science, EarlyView.
ABSTRACT Megafauna became extinct during the late Quaternary, with climate changes and human activities the two main proposed extinction drivers. Palaeoloxodon naumanni (Naumann's elephant) and Mammuthus primigenius roamed the Japanese archipelago during the Pleistocene.
Yuichi I. Naito
wiley   +1 more source

Illustrated Pollen Terminology

Cambridge International Law Journal, 2018
Dr. Dr. Heidemarie Halbritter, Dr. Silvia Ulrich, Dr. Friðgeir Grímsson, Prof. Dr. Martina Weber, Prof. Dr. Reinhard Zetter, Prof. Dr. Michael Hesse, Dr. Ralf Buchner, Mag. Matthias Svojtka, A. Frosch-Radivo   +8 more
semanticscholar   +1 more source

Mitosis in the Pollen Mother-cells of Acer negundo, L., and Staphylea trifolia, L.

, 1914
David M. Mottier
openalex   +2 more sources

Norms of Pollen-Tube Growth in Incompatible Matings of Self-Sterile Plants [PDF]

, 1934
E. M. East
openalex   +1 more source

Late Pleistocene–Holocene environmental fluctuations of southern Chihuahua Desert, Mexico

Journal of Quaternary Science, EarlyView.
ABSTRACT Paleoenvironmental reconstructions from the Mexican Chihuahua Desert based on biological proxies are scarce, creating a gap in our understanding of the ecological responses to climate change in this water‐scarce region. Here, we present a paleoenvironmental reconstruction based on geochemical data and biological proxies such as ostracods and ...
C. M. Chávez‐Lara, N. B. Palacios‐García, K. García‐Macedo, D. Ibarra‐Morales, M. Caballero   +4 more
wiley   +1 more source

The Development of the Heterotypic Chromosomes in Pollen Mother-cells [PDF]

, 1907
David M. Mottier
openalex   +1 more source

A multi‐proxy record of climate variability during the Loch Lomond Stadial (GS‐1) at Old Buckenham Mere, East England, UK

Journal of Quaternary Science, EarlyView.
ABSTRACT Northwest Europe experienced high‐amplitude climate change at the onset and end of the Younger Dryas (YD; ca 12 800–11 600 cal a BP), a crucial period to develop our understanding of natural climate dynamics. European palaeoclimatological records generally suggest a bipartite structure of the YD, potentially due to a northward retreat of the ...
Christopher P. Francis, Stefan Engels, Ian P. Matthews, Adrian P. Palmer, Katy Flowers, Ian Candy   +5 more
wiley   +1 more source

THE YELLOW COLORING SUBSTANCES OF RAGWEED POLLEN. [PDF]

, 1919
Frederick W. Heyl
openalex   +1 more source

Reconstruction and palaeoclimatic implications of Loch Lomond Readvance glaciers in the Southeast Grampians, Scotland

Journal of Quaternary Science, EarlyView.
ABSTRACT The glaciation of Scotland during the Loch Lomond Stadial (LLS; 12.9–11.7 ka BP) left a distinct and well‐preserved geomorphological signature, permitting detailed reconstructions of former glaciers and palaeoclimatic conditions. However, the extent and style of glaciation in the Southeast Grampians remains poorly constrained.
William Spicer
wiley   +1 more source

THE STUDY OF POLLEN GRAIN SURFACES IN THE ELECTRON MICROSCOPE [PDF]

, 1958
David Bradley
openalex   +1 more source