Arab Today, arab today bees saw massive extinctions with dinosaurs
Last Updated : GMT 16:35:27
Arab Today, arab today
Arab Today, arab today

Bees saw massive extinctions with dinosaurs

Arab Today, arab today

Arab Today, arab today Bees saw massive extinctions with dinosaurs

Tehran - FNA

Scientists for the first time ever documented a widespread extinction of bees that occurred 65 million years ago, concurrent with the massive event that wiped out land dinosaurs and many flowering plants. Their findings, published this week in the journal PLOS ONE, could shed light on the current decline in bee species. Lead author Sandra Rehan, an assistant professor of biological sciences at UNH, worked with colleagues Michael Schwarz at Australia\'s Flinders University and Remko Leys at the South Australia Museum to model a mass extinction in bee group Xylocopinae, or carpenter bees, at the end of the Cretaceous and beginning of the Paleogene eras, known as the K-T boundary. Previous studies have suggested a widespread extinction among flowering plants at the K-T boundary, and it’s long been assumed that the bees who depended upon those plants would have met the same fate. “Yet unlike the dinosaurs, there is a relatively poor fossil record of bees,” said Rehan, making the confirmation of such an extinction difficult. Rehan and colleagues overcame the lack of fossil evidence for bees with a technique called molecular phylogenetics. Analyzing DNA sequences of four “tribes” of 230 species of carpenter bees from every continent except Antarctica for insight into evolutionary relationships, the researchers began to see patterns consistent with a mass extinction. Combining fossil records with the DNA analysis, the researchers could introduce time into the equation, learning not only how the bees are related but also how old they are. “The data told us something major was happening in four different groups of bees at the same time,” said Rehan, of UNH\'s College of Life Sciences and Agriculture. “And it happened to be the same time as the dinosaurs went extinct,” she added. While much of Rehan\'s work involves behavioral observation of bees native to the northeast of North America, this research taps the computer-heavy bioinformatics side of her research, assembling genomic data to elucidate similarities and differences among the various species over time. Marrying observations from the field with genomic data, she said, paints a fuller picture of these bees’ behaviors over time. “If you could tell their whole story, maybe people would care more about protecting them,” she said. Indeed, the findings of this study have important implications for today\'s concern about the loss in diversity of bees, a pivotal species for agriculture and biodiversity. “Understanding extinctions and the effects of declines in the past can help us understand the pollinator decline and the global crisis in pollinators today,” Rehan said. The article, “First evidence for a massive extinction event affecting bees close to the K-T boundary,” was published in the Oct. 23, 2013 edition of PLOS ONE.

arabstoday
arabstoday

Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

Arab Today, arab today bees saw massive extinctions with dinosaurs Arab Today, arab today bees saw massive extinctions with dinosaurs

 



Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

Arab Today, arab today bees saw massive extinctions with dinosaurs Arab Today, arab today bees saw massive extinctions with dinosaurs

 



Arab Today, arab today
Arab Today, arab today Youssra depended on colored foam

GMT 16:53 2017 Tuesday ,05 September

Youssra depended on colored foam
Arab Today, arab today US travel restrictions are still 'Muslim ban'

GMT 00:54 2017 Tuesday ,26 September

US travel restrictions are still 'Muslim ban'
Arab Today, arab today Etiquette expert underlines importance of gifts

GMT 17:52 2017 Sunday ,03 September

Etiquette expert underlines importance of gifts
Arab Today, arab today Israel builds settlements 'at high rate'

GMT 01:04 2017 Tuesday ,26 September

Israel builds settlements 'at high rate'
Arab Today, arab today Saudi clerics use Twitter, textbooks

GMT 10:13 2017 Tuesday ,26 September

Saudi clerics use Twitter, textbooks
Arab Today, arab today
Arab Today, arab today
Arab Today, arab today Personality study finds fish have hidden depths

GMT 00:43 2017 Tuesday ,26 September

Personality study finds fish have hidden depths
Arab Today, arab today China refuses visa to elderly India runner

GMT 15:01 2017 Tuesday ,26 September

China refuses visa to elderly India runner
Arab Today, arab today Botanical gardens a lifeboat

GMT 02:50 2017 Tuesday ,26 September

Botanical gardens a lifeboat
Arab Today, arab today The history of solar eclipses

GMT 05:16 2017 Sunday ,20 August

The history of solar eclipses
Arab Today, arab today Chevrolet's first 9-speed auto debuts

GMT 18:58 2017 Monday ,25 September

Chevrolet's first 9-speed auto debuts
Arab Today, arab today Third generation adds more power

GMT 13:40 2017 Sunday ,24 September

Third generation adds more power
Arab Today, arab today Mai Kassab happy for participating in new film

GMT 09:33 2017 Friday ,22 September

Mai Kassab happy for participating in new film
Arab Today, arab today Conditions growing dire    

GMT 09:22 2017 Monday ,25 September

Conditions growing dire    

GMT 08:56 2017 Thursday ,21 September

Lebleba is preoccupied in filming 'Back Street'

GMT 10:27 2017 Sunday ,24 September

'Lady Beast' fights for girl gamers

GMT 16:53 2017 Saturday ,02 September

Mai importance of gifts during Eid Al-Adha

GMT 05:05 2017 Sunday ,24 September

Psychologists help Mexico deal

GMT 10:46 2017 Saturday ,05 August

Nanis reveals simple ideas for home renovation

GMT 16:08 2017 Monday ,25 September

'World's heaviest woman' dies

GMT 12:09 2017 Sunday ,24 September

Taxi! Transport gets an overhaul

GMT 17:12 2017 Monday ,07 August

Al-Shawaifi reveals secrets of total solar eclipse

GMT 12:46 2017 Thursday ,21 September

Google likely to buy stake in Taiwan smartphone maker HTC

GMT 11:37 2017 Saturday ,12 August

Fashion designer reveals her new collection
Arab Today, arab today
Arab Today, arab today
 
 Arab Today Facebook,arab today facebook  Arab Today Twitter,arab today twitter Arab Today Rss,arab today rss  Arab Today Youtube,arab today youtube  Arab Today Youtube,arab today youtube
arabstoday arabstoday arabstoday arabstoday
arabstoday arabstoday arabstoday
arabstoday
بناية النخيل - رأس النبع _ خلف السفارة الفرنسية _بيروت - لبنان
arabstoday, Arabstoday, Arabstoday