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Top News In பேலீயஂடாலொஜீ ஆஃப் தி சீன கலைக்கழகம் அறிவியல் Today - Breaking & Trending Today

Study shows how varying climate conditions impact vulnerable species

Credit: University of Arkansas
New findings on the diet of Arctic foxes, determined by the condition of their teeth, show how varying climate conditions in the Arctic affect the animals that live there.
In a study published in
Polar Biology, Peter Ungar, Distinguished Professor of anthropology at the University of Arkansas, and several co-authors analyzed tooth breakage and wear - both gross and micro - of Arctic foxes from Russia s Yamal Peninsula.
Studying the effect of varying climate conditions within this region helps scientists understand the impact of climate change on vulnerable animals and could explain future responses and adaptation, given the warming trend and thawing in Arctic areas. The researchers study is the first to combine dental proxies for short-term, or seasonal, and long-term, or lifetime, diet to better understand how resource depletion affects species differently in different locations within the Arctic. ....

Yamal Peninsula , Yamalo Nenetskiy Avtonomnyy Okrug , United States , Ivan Fufachev , Natalia Sokolova , Viktor Shtro , Los Angeles , Olivier Gilg , Peter Ungar , Alexander Volkovitskiy , Blaire Van Valkenburgh , Aleksandr Sokolov , Dorothee Ehrich , Alexandra Terekhina , University Of California , Arctic University Of Norway , International Union For Conservation Of Nature , National Science Foundation Navigating The New Arctic , Institute Of Plant , University Of Arkansas , Polar Biology , Distinguished Professor , International Union , Alexandria Peterson , Environmental Dynamics , Arctic University ,

Fossilized feeding frenzy

An international team of scientists with Fridgeir Grímsson from the University of Vienna has found a previously unknown fossil fly species in old lake sediments of the Messel Pit, a UNESCO World Heritage Site in Germany. In the stomach of the fossil insect, pollen from various plants could be detected, which allows rare insights into the feeding behavior, the ecology and the role of the fly as a pollinator. The study was published in Current Biology . ....

Department Of Botany , Biodiversity Research Of The University Vienna , Biodiversity Research , Current Biology , Plant Sciences , துறை ஆஃப் தாவரவியல் , பல்லுயிர் ஆராய்ச்சி ஆஃப் தி பல்கலைக்கழகம் வியன்னா , பல்லுயிர் ஆராய்ச்சி , தற்போதைய உயிரியல் , ஆலை அறிவியல் ,

World's First Dinosaur Preserved Sitting on a Nest of Embryo-Filled Eggs Found

Fossilized dinosaur eggs have been found by paleontologists for centuries. Modern-day dinosaurs – alligators, crocodiles, snapping turtles, birds, etc. – have ben seen sitting on or near nests of eggs. It would seem logical that paleontologists would find fossilized dinosaurs sitting on nests of fossilized eggs about to hatch. Yet that has never been the case … until now.
“This kind of discovery, in essence fossilized behavior, is the rarest of the rare in dinosaurs. Though a few adult oviraptorids have been found on nests of their eggs before, no embryos have ever been found inside those eggs. In the new specimen, the babies were almost ready to hatch, which tells us beyond a doubt that this oviraptorid had tended its nest for quite a long time. This dinosaur was a caring parent that ultimately gave its life while nurturing its young.” ....

Xing Xu , Matthew Lamanna , Institute Of Vertebrate Paleontology , Carnegie Museum Of Natural History , Chinese Academy Of Sciences , Upper Cretaceous Nanxiong Formation , Jiangxi Province , Vertebrate Paleontology , Carnegie Museum , Natural History , Science Bulletin , Chinese Academy , Natural World , Ancient Mysteries , Science Amp Technology , க்ஷிங் ஐயூ , மேத்யூ லமண்ணா , நிறுவனம் ஆஃப் முதுகெலும்பு பேலீயஂடாலொஜீ , கார்னகி அருங்காட்சியகம் ஆஃப் இயற்கை வரலாறு , சீன கலைக்கழகம் ஆஃப் அறிவியல் , ஜியாங்சி மாகாணம் , முதுகெலும்பு பேலீயஂடாலொஜீ , கார்னகி அருங்காட்சியகம் , இயற்கை வரலாறு , அறிவியல் புல்லட்டின் , சீன கலைக்கழகம் ,

Paleontology: Microscope helps with dinosaur puzzle | EurekAlert! Science News

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IMAGE: (here a team from the Aathal dinosaur museum in Wyoming, co-author Hans-Jakob Siber front center) often belong to different animals.
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Credit: (c) Sauriermuseum Aathal
Fossil sites sometimes resemble a living room table on which half a dozen different jigsaw puzzles have been dumped: It is often difficult to say which bone belongs to which animal. Together with colleagues from Switzerland, researchers from the University of Bonn have now presented a method that allows a more certain answer to this question. Their results are published in the journal
Palaeontologia Electronica.
Fossilized dinosaur bones are relatively rare. But if any are found, it is often in large quantities. Many sites contain the remains of dozens of animals, explains Prof. Dr. Martin Sander from the Institute of Geosciences at the University of Bonn. ....

Switzerland General , United States , Nordrhein Westfalen , Martin Sander , Martinp Sander , Hans Jakob Siber , Howe Scott , Nico Roccazzella , Kayleigh Wiersma Weyand , Aurore Canoville , University Of Bonn , Institute Of Geosciences , Museum Koenig , Morrison Formation , Palaeontologia Electronica , Earth Science , சுவிட்சர்லாந்து ஜநரல் , ஒன்றுபட்டது மாநிலங்களில் , னோற்ர்ேன் வெஸ்ட்ஃபாலன் , மார்டின் சாண்டர் , ஹான்ஸ் ஜாகோப் சைபர் , எப்படி ஸ்காட் , பல்கலைக்கழகம் ஆஃப் பொன் , நிறுவனம் ஆஃப் புவி அறிவியல் , அருங்காட்சியகம் க்க்நிக் , மோரிசன் உருவாக்கம் ,

Fossil lamprey larvae overturn textbook assumptions on vertebrate origins

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IMAGE: 1.5 cm long Priscomyzon hatchling showing bulge of yolk sac material. Photo at left, annotated photo at centre and drawing at right. Figure from paper. Picture credit Nature publishing group..
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Credit: Nature Publishing Group
The unprecedented discovery of an ancient lamprey growth series, published in the prestigious scientific journal,
Nature, is overturning long-held ideas as to what modern lampreys may tell us about the origin of vertebrates (all animals with a backbone such as goldfish, lizards, crows and people).
Lampreys and modern hagfish are the only jawless fish alive that branched off from the family tree of vertebrates before they got jaws, says Dr Rob Gess from the Albany Museum in Makhanda, who discovered the ancient fossils. This makes them very interesting for researchers attempting to understand the earliest stages of vertebrate history. ....

South Africa , United States , Makhanda Grahamstown , Albany Museum In Makhanda , Albany Museum , Waterloo Farm , North America , Marine Freshwater Biology , Old World , New World , ஒன்றுபட்டது மாநிலங்களில் , அல்பானி அருங்காட்சியகம் , வாட்டர்லூ பண்ணை , வடக்கு அமெரிக்கா , கடல் நன்னீர் உயிரியல் , பழையது உலகம் , புதியது உலகம் ,