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The trouble of being tall


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IMAGE: Giraffes are in general very alert and exploit their height advantage to scan the horizon using their excellent eyesight
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Credit: Mogens Trolle
The giraffe is a truly puzzling animal. With its exceptional anatomy and suite of evolutionary adaptations, the giraffe is an outstanding case of animal evolution and physiology. Now, an international team of researchers from the University of Copenhagen and Northwestern Polytechnical University in China have produced a high-quality genome from the giraffe and investigated which genes are likely to be responsible for its unique biological features.
The extraordinary stature of the giraffe has led to a long list of physiological co-adaptations. The blood pressure of the giraffe, for instance, is twice as high as in humans and most other mammals to allow a steady blood supply to the lofty head. How does the giraffe avoid the usual side effects of high blood pressure, such as severe dam ....

Rasmus Heller , Qiang Qiu , Northwestern Polytechnical University , University Of Copenhagen , Department Of Biology , Cell Biology , Ecology Environment , Population Biology , Zoology Veterinary Science , ரஸ்முச் ஹெல்லர் , கியாங் கீயூ , வடமேற்கு போள்யிட்டேச்ணிகள் பல்கலைக்கழகம் , பல்கலைக்கழகம் ஆஃப் கோபெந்ஹேகந் , துறை ஆஃப் உயிரியல் , செல் உயிரியல் , சூழலியல் சூழல் , பாப்யுலேஶந் உயிரியல் , ஸுவாலஜீ கால்நடை அறிவியல் , உயிர் தகவலியல் ,

Deforestation taking a heavy toll on international bird haven


Credit: Pablo Negret
An analysis has found deforestation is severely affecting forest bird species in Colombia, home to the greatest number of bird species in the world.
University of Queensland-led research, steered by Dr Pablo Negret, analysed the impact of deforestation on 550 bird species, including 69 only found in the South American nation.
Our study has shown an astonishing reduction in bird species habitat, Dr Negret said.
One third of the forest bird species in Colombia have lost at least a third of their historical habitat, and that s just using the most recent data we have available - from 2015.
Moreover, 18 per cent or 99 species have lost more than half of their historical habitat to date. ....

United States , Pablo Negret , Martine Maron , International Union For Conservation Of Nature , South American , International Union , Biological Conservation , Ecology Environment , Population Biology , ஒன்றுபட்டது மாநிலங்களில் , மார்டின் மாரன் , சர்வதேச தொழிற்சங்கம் க்கு பாதுகாப்பு ஆஃப் இயற்கை , தெற்கு அமெரிக்கன் , சர்வதேச தொழிற்சங்கம் , உயிரியல் பாதுகாப்பு , சூழலியல் சூழல் , பாப்யுலேஶந் உயிரியல் ,

New probe set unravels evolutionary history of second-most diverse group of land plants


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IMAGE: Flagellate plants are a diverse group with more than 30,000 living species, including ferns, lycophytes, bryophytes, and gymnosperms.
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Credit: Photos by Emily Sessa.
In 2016, a collaborative group of research and education specialists received funding from the National Science Foundation for the project Building a Comprehensive Evolutionary History of Flagellate Plants also known as Genealogy of Flagellate Plants (GoFlag). Members of the team have the ambitious goal of reconstructing the 470-million-year history of one of the most diverse groups of land plants on the planet.
The first of several forthcoming publications from the project was published in a recent issue of ....

United States , Gordon Burleigh , Wiley Online Library , Society Of America , University Of Florida , National Science Foundation , Applications In Plant Sciences , Comprehensive Evolutionary History , Flagellate Plant , Principal Investigator , Plant Sciences , Botanical Society , Wiley Online , Molecular Biology , Population Biology , ஒன்றுபட்டது மாநிலங்களில் , கோர்டந் பர்லீ , விலே நிகழ்நிலை நூலகம் , சமூகம் ஆஃப் அமெரிக்கா , பல்கலைக்கழகம் ஆஃப் புளோரிடா , தேசிய அறிவியல் அடித்தளம் , பயன்பாடுகள் இல் ஆலை அறிவியல் , விரிவான பரிணாம வளர்ச்சி வரலாறு , ப்ரிந்ஸிபல் புலனாய்வாளர் , ஆலை அறிவியல் , தாவரவியல் சமூகம் ,

Whooping cranes steer clear of wind turbines when selecting stopover sites


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IMAGE: A pair of whooping cranes walking along the edge of a wetland in central Kansas
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Credit: Travis Wooten/USGS
As gatherings to observe whooping cranes join the ranks of online-only events this year, a new study offers insight into how the endangered bird is faring on a landscape increasingly dotted with wind turbines. The paper, published this week in
Ecological Applications, reports that whooping cranes migrating through the U.S. Great Plains avoid rest stop sites that are within 5 km of wind-energy infrastructure.
Avoidance of wind turbines can decrease collision mortality for birds, but can also make it more difficult and time-consuming for migrating flocks to find safe and suitable rest and refueling locations. The study s insights into migratory behavior could improve future siting decisions as wind energy infrastructure continues to expand. ....

Aaron Pearse , Ecological Applications , Northern Prairie Wildlife Research Center , Great Plains , Ecology Environment , Population Biology , ஆரோன் பியர்ஸ் , சுற்றுச்சூழல் பயன்பாடுகள் , வடக்கு ப்ரேரீ வனவிலங்கு ஆராய்ச்சி மையம் , நன்று சமவெளி , சூழலியல் சூழல் , பாப்யுலேஶந் உயிரியல் ,