Results 51 to 60 of about 23,270 (210)

Molecular and fossil evidence place the origin of cichlid fishes long after Gondwanan rifting. [PDF]

open access: yes, 2013
Cichlid fishes are a key model system in the study of adaptive radiation, speciation and evolutionary developmental biology. More than 1600 cichlid species inhabit freshwater and marginal marine environments across several southern landmasses.
Alex Dornburg   +9 more
core   +1 more source

Climate conditions on the South‐Iberian Palaeomargin during the latest Pliensbachian to early Toarcian: A mineralogical and geochemical study from hemipelagic deposits

open access: yesSedimentology, EarlyView.
ABSTRACT The integrated analysis of lithofacies, mineralogy and geochemistry of the hemipelagic marine succession exposed in La Cerradura section (South‐Iberian Palaeomargin) provides new information to characterise the palaeoenvironmental conditions during the latest Pliensbachian to early Toarcian, including the Jenkyns Event.
Chaima Ayadi   +4 more
wiley   +1 more source

Evolution of Crematogaster sordidula (Hymenoptera, Formicidae) Ants in the Mediterranean Region During Plio‐Pleistocene Climatic Changes

open access: yesZoologica Scripta, EarlyView.
ABSTRACT Understanding insect responses to global climate change involves identifying strategies used during past climate oscillations. Phylogeography offers a powerful framework to unravel how historical climatic and geological events have shaped the spatial genetic patterns of species, providing critical insights into evolutionary processes, whereas ...
Jody H. Voges   +12 more
wiley   +1 more source

Paleoecology of the Maastrichtian and Danian sediment at North of Central Alborz, Iran, based on Planktonic foraminifera [PDF]

open access: yes, 2010
In order to study the fossil contents of the Ziarat-kola section for biostratigraphical purposes the 212 meters was sampled at Central Alborz. The sequence is mainly made up of monotonous grey- green to light grey marl.
Behnaz Balmaki
core   +2 more sources

Reports and Maps of the Geological Survey Released Only in the Open Files, 1966 [PDF]

open access: yes, 1967
There is a reference to the Espey "Some effects on urbanization on storm runoff, Waller Creek".Waller Creek Working ...
Brett, George W.   +2 more
core   +1 more source

Hypotheses to explain the origin of species in Amazonia

open access: yesBrazilian Journal of Biology
The main hypotheses proposed to explain barrier formation separating populations and causing the differentiation of species in Amazonia during the course of geological history are based on different factors, as follow: (1) Changes in the distribution of ...
J. Haffer
doaj   +1 more source

Academician Vladimir Laskarev (1868-1954) and Paratethys [PDF]

open access: yesGeološki Anali Balkanskoga Poluostrva
Vladimir Laskarev (1868–1954) Russian and Serbian geologist strongly influenced geological literature by introducing a scientific term Paratethys for the series of intercontinental water basins separated from the Mediterranean Sea and the World Ocean by ...
Malakhova Irina   +3 more
doaj   +1 more source

A secular increase in continental crust nitrogen during the Precambrian [PDF]

open access: yes, 2017
Recent work indicates the presence of substantial geologic nitrogen reservoirs in the mantle and continental crust. Importantly, this geologic nitrogen has exchanged between the atmosphere and the solid Earth over time. Changes in atmospheric nitrogen (i.
Goldblatt, Colin, Johnson, Benjamin W
core   +3 more sources

Multiple freshwater invasions of the tapertail anchovy (Clupeiformes: Engraulidae) of the Yangtze River

open access: yesEcology and Evolution, 2019
Freshwater fish evolved from anadromous ancestors can be found in almost all continents. The roles of paleogeographic events and nature selection in speciation process often are under focus of research.
Fangyuan Cheng   +3 more
doaj   +1 more source

THE USE OF THE ELEMENTS OF MORPHOECOLOGICAL ADAPTATIONS OF ORGANISMS TO THE ENVIRONMENT UNDER PALEOGEOGRAPHIC RECONSTRUCTIONS OF BIOTAS OF TETIYSKY DESERT-STEPPE REGION (BUILDING SCHEMES OF HISTORICAL FORMATION OF FLORA AND FAUNA)

open access: yesЮг России: экология, развитие, 2016
Aim. The question of life forms (morpho-ecological adaptation of the organism to the environment) is an actual problem of ecological morphology. Different approaches in the study of Coleoptera life forms, including comparative morphological, ontogenetic ...
G. M. Abdurakhmanov   +7 more
doaj   +1 more source

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