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:3/24/2017)... 2017 The Controller General of Immigration from Maldives ... Algeen have received the prestigious international IAIR Award for the most ... Reading ... Maldives ... Abdulla Algeen (small picture on the right) have received the IAIR award ...
(Date:3/23/2017)... , March 23, 2017 The report "Gesture Recognition ... Biometric), Industry, and Geography - Global Forecast to 2022", published by MarketsandMarkets, the ... a CAGR of 29.63% between 2017 and 2022. ... ... ...
(Date:3/22/2017)... 21, 2017   Neurotechnology , a provider ... today announced the release of the SentiVeillance ... improved facial recognition using up to 10 surveillance, ... computer. The new version uses deep neural-network-based facial ... it utilizes a Graphing Processing Unit (GPU) for ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... ... 10, 2017 , ... San Diego-based team building and cooking events company, Lajollacooks4u, ... The bold new look is part of a transformation to increase awareness, appeal ... growth period. , It will also expand its service offering from its signature gourmet ...
(Date:10/10/2017)... (PRWEB) , ... October 10, 2017 , ... ... Science Center’s FirstHand program has won a US2020 STEM Mentoring Award. Representatives of ... award for Excellence in Volunteer Experience from US2020. , US2020’s mission is to ...
(Date:10/10/2017)... 10, 2017 International research firm Parks Associates announced ... at the TMA 2017 Annual Meeting , October 11 in ... residential home security market and how smart safety and security products impact ... Parks Associates: Smart Home ... "The residential security market has ...
(Date:10/10/2017)... ... October 10, 2017 , ... USDM Life Sciences , ... life sciences and healthcare industries, announces a presentation by Subbu Viswanathan and Jennifer ... “Automating GxP Validation for Agile Cloud Platforms,” will present a revolutionary approach to ...
Breaking Biology Technology:
Cached News: