Featured Research

from universities, journals, and other organizations

How have changing sea-levels influenced evolution on the Galapagos Islands?

Date:
May 6, 2014
Source:
Wiley
Summary:
The Galapagos Islands have an iconic status in the history of evolutionary study, now new research shows that the islands' own geological past may have influenced the evolution of the chain's native species.

The Galapagos Islands have an iconic status in the history of evolutionary study, now new research shows that the islands' own geological past may have influenced the evolution of the chain's native species.

Related Articles


Writing in the Journal of Biogeography, Jason Ali and Jonathan Aitchison explore how fluctuating sea level changes over thousands of years impacted the island chain's ecology. They estimate that when the sea retreated, most recently 20,000 years ago, the water would have been 144m below its current level.

As a result, Santa Cruz, the island in the center of the archipelago, would have expanded, enveloping many of the smaller islands, while creating a series of shallow 'land bridges' between the volcanic outcroppings. Such bridges explain the range and diversity of the islands' species, such as snakes, geckos and iguanas, which appear landlocked to modern eyes.

"As soon as I saw that that half the islands in the archipelago were sat on a single, shallow, submarine platform, I realized that the implications for biology could be significant," said Dr. Ali. "My geological knowledge told me that sea-level falls must have regularly re-connected the islands, and that this must have profoundly shaped the landlocked biota's distribution, and very likely its composition."


Story Source:

The above story is based on materials provided by Wiley. Note: Materials may be edited for content and length.


Journal Reference:

  1. Jason R. Ali, Jonathan C. Aitchison. Exploring the combined role of eustasy and oceanic island thermal subsidence in shaping biodiversity on the Galαpagos. Journal of Biogeography, 2014; DOI: 10.1111/jbi.12313

Cite This Page:

Wiley. "How have changing sea-levels influenced evolution on the Galapagos Islands?." ScienceDaily. ScienceDaily, 6 May 2014. <www.sciencedaily.com/releases/2014/05/140506120206.htm>.
Wiley. (2014, May 6). How have changing sea-levels influenced evolution on the Galapagos Islands?. ScienceDaily. Retrieved November 22, 2014 from www.sciencedaily.com/releases/2014/05/140506120206.htm
Wiley. "How have changing sea-levels influenced evolution on the Galapagos Islands?." ScienceDaily. www.sciencedaily.com/releases/2014/05/140506120206.htm (accessed November 22, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Saturday, November 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Could Your Genes Be The Reason You're Single?

Could Your Genes Be The Reason You're Single?

Newsy (Nov. 21, 2014) — Researchers in Beijing discovered a gene called 5-HTA1, and carriers are reportedly 20 percent more likely to be single. Video provided by Newsy
Powered by NewsLook.com
Raw: Baby Okapi Born at Houston Zoo

Raw: Baby Okapi Born at Houston Zoo

AP (Nov. 20, 2014) — The Houston Zoo released video of a male baby okapi. Okapis, also known as the "forest giraffe", are native to the Democratic Republic of the Congo in Central Africa. Video is mute from source. (Nov. 20) Video provided by AP
Powered by NewsLook.com
Your Complicated Job Might Keep Your Brain Young

Your Complicated Job Might Keep Your Brain Young

Newsy (Nov. 20, 2014) — Researchers at the University of Edinburgh found the more complex your job is, the sharper your cognitive skills will likely be as you age. Video provided by Newsy
Powered by NewsLook.com
Mysterious Glow Worms Found in the Amazon

Mysterious Glow Worms Found in the Amazon

Buzz60 (Nov. 20, 2014) — Wildlife photographer Jeff Cremer teamed up with entomologist Aaron Pomerantz and others to investigate a predatory glow worm found in the Amazon. Patrick Jones (@Patrick_E_Jones) explains. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins