HOME >> BIOLOGY >> NEWS
Lizard research bolsters theory that forest edges are hotbeds of speciation

ving organisms, but also may be important to forming new species.

Schneider, who is a principal investigator for CTR, says: "When we think about the processes that generate biodiversity in rainforests, we need to move beyond the traditional view of geographic isolation and focus on the ecological opportunities that are provided by habitat gradients and newly formed habitats."

In their study, the researchers found that open-forest lizards were smaller, had shorter limbs and a bigger head, and became sexually mature earlier than their rainforest counterparts.

To test for the selective forces influencing the rapid changes in the skinks' appearance and reproductive maturity, the researchers looked at predation. Because theoretical studies suggest that natural selection caused by predation favors the evolution of smaller bodies and earlier reproduction, they suspected that lizard-eating birds hunting in open forests were the agents of natural selection.

The researchers placed 480 plastic lizard decoys, painted to match the striped, reddish skink, throughout the dense rainforest and the open dry forest. By looking for the telltale bite marks created by bird bills, the researchers identified how many models were attacked.

According to Schneider, it was no contest between the two sites. Twenty-one models were targeted in the open, transitional forest, versus only four in the closed rainforest habitat.

"We have identified a potential selective mechanism that would explain the difference in size between rainforest and open forest habitats," says Schneider. "The changes in morphology across habitats, in spite of high levels of gene flow, suggest rapid adaptive evolution in response to natural selection."

The evolutionary mechanisms that have fostered the rich tapestry of plant and animal species found in tropical rainforests, which harbor roughly half the Earth's species, have been hotly debated for decades.
'"/>

Contact: Merrik Bush-Pirkle
merrik@sfsu.edu
415-338-6747
San Francisco State University
21-Nov-1999


Page: 1 2 3 4

Related biology news :

1. Lizards and salamanders may use lungs to hear, study says
2. Lizards do really learn to recognize people
3. Caribbean Lizards Evolve Independently
4. Leader in cancer treatment and prevention research honored
5. UT Southwestern receives $1.78 million grant for obesity research as part of NIH Roadmap initiative
6. Scientists to prototype cyberinfrastructure for research and education access to ocean observatories
7. Belgian researchers explore revolutionary approach to angiogenesis
8. Award winning researchers reveal potential new role for Glivec
9. New research shows plants can shuffle and paste gene pieces to generate genetic diversity
10. 16 APS exercise research highlights, from reduced flu mortality to proteomics & obesity
11. Gene chips research in cotton could lead to superior variety

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/22/2016)... American College of Medical Genetics and Genomics was once again ... of the fastest-growing trade shows during the Fastest 50 Awards ... Las Vegas . Winners are ... of the following categories: net square feet of paid exhibit ... 2015 ACMG Annual Meeting was ranked 23 out of 50 ...
(Date:6/22/2016)... 2016 On Monday, the Department of Homeland ... share solutions for the Biometric Exit Program. The Request ... Protection (CBP), explains that CBP intends to add biometrics ... the United States , in order to deter ... Logo - http://photos.prnewswire.com/prnh/20160622/382209LOGO ...
(Date:6/20/2016)... 20, 2016 Securus Technologies, a leading ... for public safety, investigation, corrections and monitoring announced ... it has secured the final acceptance by all ... Managed Access Systems (MAS) installed. Furthermore, Securus will ... be installed by October, 2016. MAS distinguishes between ...
Breaking Biology News(10 mins):
(Date:12/7/2016)... 7, 2016 /PRNewswire/ - OncoQuest Inc. ("OncoQuest"), a ... of immunotherapeutic products for the treatment of cancer, ... Antibody Manufacturing Development Program with Cytovance Biologics ( ... its oregovomab antibody product. Supported by recent positive ... study in ovarian cancer patients, OncoQuest has engaged ...
(Date:12/7/2016)...  Vyriad Inc. announced today the appointment of ... Directors. "We are delighted to welcome Al ... develop our oncolytic viruses as the next generation of ... , MD, PhD, CEO of Vyriad. "Al and his ... passion for making a difference for cancer patients—their philanthropy ...
(Date:12/7/2016)... (PRWEB) , ... December 07, 2016 , ... ... treatment and resource recovery solutions for industrial facilities, today announced that one of ... the first to use Cambrian’s novel water-energy purchase agreement (WEPA). Under the WEPA, ...
(Date:12/6/2016)... Dec. 6, 2016 The American Botanical Council ... of arnica ( Arnica montana ) through ABC,s ... HerbMedPro database, a comprehensive, interactive online ... clinical research data on the uses and health ... Naturopathica, a wellness company with healing arts ...
Breaking Biology Technology:
Cached News: