Results 11 to 20 of about 171 (156)

Exchanging Genes Within a City: Analysis of Pollen Flow Patterns in a Narrow Endemic Plant Species Threatened by Urbanisation. [PDF]

open access: yesEcol Evol
Anthropogenic habitat fragmentation can severely disrupt gene flow in endemic plants that depend on species‐specific native pollinators with limited dispersal ability. Using paternity analysis across fragmented and continuous populations, we found that pollen flow was maintained in intact bushland but was completely absent between fragments separated ...
Delnevo N   +5 more
europepmc   +2 more sources

Permian Large Igneous Provinces and Their Paleoenvironmental Effects

open access: yesGeophysical Monograph Series, Page 417-434., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jun Chen, Yi‐Gang Xu
wiley  

+2 more sources

Early evolutionary history of the seed. [PDF]

open access: yesBiol Rev Camb Philos Soc
ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Bateman RM, Spencer ART, Hilton J.
europepmc   +2 more sources

Reorganization of Northern Peri-Gondwanan Terranes at Cambrian–Ordovician Times: Insights from the Detrital Zircon Record of the Ossa-Morena Zone (SW Iberian Massif)

open access: yesLithosphere, 2022
The Ossa-Morena Zone constitutes a fringe Gondwana-related terrane all along the Paleozoic. This continental block has been classically interpreted as being attached to a portion of the northern Gondwanan margin located close to the West African Craton ...
Cristina Accotto   +4 more
doaj   +1 more source

NEW LINGULIFORMEAN BRACHIOPODS FROM THE LOWER TREMADOCIAN (ORDOVICIAN) OF THE BRABANT MASSIF, BELGIUM, WITH COMMENTS ON CONTEMPORANEOUS FAUNAS FROM THE STAVELOT–VENN MASSIF

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2021
Lower Ordovician brachiopod macrofaunas in Belgium (Avalonia) are seldom collected and studied due to the poor preservation of material. Here we describe a new fauna of linguliformean brachiopods from the Chevlipont Formation (lower Tremadocian) in the ...
YVES CANDELA   +5 more
doaj   +1 more source

Paleozoic Decollement Displaced the Surface Trace of Iapetus Ocean Closure in Northern Appalachians

open access: yesGeophysical Research Letters, 2023
The northern Appalachians record accretion of Laurentia‐ and Gondwana‐derived terranes to Laurentian margin during the formation of Pangea. Terrane bounding structures, key to reconstructing this history, are poorly understood at depth.
V. Levin   +3 more
doaj   +1 more source

Middle–Late Ordovician organic- walled phytoplankton from Sweden: diversity and early radiation [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
The Borenshult-1 core, drilled in the vicinity of Motala, east of Lake Vättern in south central Sweden, comprises a well-dated and nearly complete succession of marine marly carbonates deposited relatively close to land. The 34 core samples analyzed for
Claudia V. Rubinstein, Vivi Vajda
doaj   +1 more source

Preservation of fossils in the Šárka Formation (Darriwilian, Czech Republic) [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
The Šárka Formation is a well-known, fossiliferous Ordovician deposit in Bohemia. It has been targeted by fossil collectors since the 19th century due to the excellent preservation of many fossils.
Petr Kraft, Jana Bruthansová
doaj   +1 more source

Metamorphic evolution and $P$–$T$ path of the Posada Valley amphibolites: new insights on the Variscan high pressure metamorphism in NE Sardinia, Italy

open access: yesComptes Rendus. Géoscience, 2021
The Posada Valley amphibolites in the inner zone of Variscan Sardinia are characterized by garnet porphyroblasts containing epidote, titanite, quartz, clinopyroxene, amphibole, and plagioclase concentrated in the garnet core.
Scodina, Massimo   +2 more
doaj   +1 more source

Ordovician graptolites from the basal part of the Palaeozoic transgressive sequence in the Karadere area, Zonguldak Terrane, NW Turkey [PDF]

open access: yesEstonian Journal of Earth Sciences, 2014
The Karadere area to the east of Safranbolu in NW Anatolia is one of the very few localities in Turkey where the contact between the Cadomian basement and the Lower Palaeozoic transgressive succession is well exposed.
M. Cemal Göncüoglu   +3 more
doaj   +1 more source

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