Arab Today, arab today bees saw massive extinctions with dinosaurs
Last Updated : GMT 21:53:08
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

 



Arab Today, arab today

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 France defies terrorism through tourism

GMT 15:18 2017 Saturday ,20 May

France defies terrorism through tourism
Arab Today, arab today Zainab Fadel Oglu designs “Shakerin” mosque

GMT 12:13 2017 Thursday ,11 May

Zainab Fadel Oglu designs “Shakerin” mosque
View News in Arabic - Education: تقارير وملفات
Arab Today, arab today
Arab Today, arab today
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