Results 11 to 20 of about 683 (154)

Roots, Tissues, Cells and Fragments—How to Characterize Peat from Drained and Rewetted Fens

open access: yesSoil Systems, 2020
We present analyses of macroscopic and microscopic remains as a tool to characterise sedge fen peats. We use it to describe peat composition and stages of peat decomposition, to assess the success of rewetting of a formerly drained fen, and to understand
Dierk Michaelis   +2 more
doaj   +1 more source

High-resolution ecosystem changes pacing the millennial climate variability at the Middle to Upper Palaeolithic transition in NE-Italy

open access: yesScientific Reports, 2023
Observation of high-resolution terrestrial palaeoecological series can decipher relationships between past climatic transitions, their effects on ecosystems and wildfire cyclicity. Here we present a new radiocarbon dated record from Lake Fimon (NE-Italy)
Federica Badino   +9 more
doaj   +1 more source

Severe Plane-Form Enamel Hypoplasia in a Dentition from Roman Britain

open access: yesDental Anthropology, 2017
Enamel defects can provide insight into the life histories of past individuals and populations, including information on a wide range of disturbances during childhood.
Ian Towle   +3 more
doaj   +1 more source

Earliest filter-feeding pterosaur from the Jurassic of China and ecological evolution of Pterodactyloidea [PDF]

open access: yesRoyal Society Open Science, 2017
Pterosaurs were a unique clade of flying reptiles that were contemporaries of dinosaurs in Mesozoic ecosystems. The Pterodactyloidea as the most species-diverse group of pterosaurs dominated the sky during Cretaceous time, but earlier phases of their ...
Chang-Fu Zhou   +5 more
doaj   +1 more source

Platinum Group Element Traces of CAMP Volcanism Associated With Low‐Latitude Environmental and Biological Disruptions

open access: yesGeophysical Monograph Series, Page 263-304., 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.
Jessica H. Whiteside   +3 more
wiley  

+1 more source

High-Resolution Multiproxy Record of Environmental Changes and Anthropogenic Activities at Unguja Ukuu, Zanzibar, Tanzania during the Last 5000 Years

open access: yesQuaternary, 2023
A high-resolution multiproxy sedimentary record comprising pollen, charcoal, trace element, stratigraphy and particle size data is used to reveal environmental changes from the mangrove ecosystem at Unguja Ukuu, Zanzibar, Tanzania, over the last 5000 ...
Apichaya Englong   +5 more
doaj   +1 more source

Using Annual Resolution Pollen Analysis to Synchronize Varve and Tree-Ring Records

open access: yesQuaternary, 2019
Fossil wood and varved lake sediments allow proxy analysis with exceptionally high, (sub-)annual resolution. Both archives provide dating through ring and layer counting, yet with different accuracy.
Martin Theuerkauf   +6 more
doaj   +1 more source

Geographically weighted models in palaeoecology: R package and application to testate amoebae in peatlands [PDF]

open access: yesWeb Ecology
Transfer function (TF) models are commonly used in palaeoecology for quantitative inference of environmental variables based on biological proxies. Although the existence of spatial structure is well established in ecology, existing TFs do not account ...
S. Erb   +7 more
doaj   +1 more source

From LBK to SBK: Pottery, Bones, Lithics and Houses at the Neolithic site of Hrdlovka, Czech Republic

open access: yesOpen Archaeology, 2016
The paper is focused on the period of cultural change at the turn of 6th and 5th millennia BC, when the uniform Linear Pottery Culture (LBK) occupying an extensive area disintegrated in several local groups or cultures, including the Stroked Pottery ...
Vondrovský Václav   +4 more
doaj   +1 more source

Palynostratigraphy and palaeoecology of the Niur Formation, Tikdar section, northwest of Kerman, Central Iran [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2019
Diverse, moderately to well-preserved palynomorphs including acritarchs (sensu stricto), prasinophytes cyst, chitinozoans, scolecodonts, and spores occur in some surface samples (90 meters thereof) of the Niur Formation (200 m thick) at the Tikdar ...
Hossein Hashemi   +2 more
doaj   +1 more source

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