Navigation Links
New explanation for a puzzling biological divide along the Malay Peninsula
Date:3/6/2009

Ecologists at the University of California, San Diego, offer a new explanation for an apparently abrupt switch in the kinds in of mammals found along the Malay Peninsula in southeast Asia from mainland species to island species in the absence of any geographical barrier.

An ancient seaway between the Gulf of Thailand and the Andaman Sea was once thought have split the peninsula in two, allowing separated populations of animals to diverge. But a recent revision of the history of sea levels reveals that the ocean hasn't cut through the peninsula in the past 40 million years. Current species of mammals are much younger than that.

Instead, David Woodruff, professor of biology at UC San Diego and former graduate student Leslie Turner, now at the Max Planck Institute for Evolutionary Biology in Ploen, Germany, say that more than 58 rapid sea level rises in the last 5 million years could account for the shift by crowding out species, particularly at the narrowest part of the peninsula called the Isthmus of Kra. The Journal of Biogeography posted their findings online February 25.

For most of the past few million years, the shallow ocean shelf surrounding the peninsula and islands of Malaysia and Indonesia has been exposed, creating a land area about the size of Europe. That habitat shrank dramatically each time sea levels rose.

"The ocean is coming from both sides repeatedly to squeeze things," Woodruff said. "If you have the ocean edge coming back and forth more than 50 times around this little narrow area, you'll compress the fauna and cause species to go extinct locally."

By consulting published reports, Woodruff and Turner mapped the ranges of 325 species of mammals found in the region. "We studied mammals from China down to Singapore," Woodruff said. But they found no evidence for a sharp transition between types of mammals at Kra or anywhere else along the peninsula.

Instead, they saw a gap. "We fou
'/>"/>

Contact: David Woodruff
dwoodruff@ucsd.edu
University of California - San Diego
Source:Eurekalert

Page: 1 2

Related biology news :

1. Diversity of trees in Ecuadors Amazon rainforest defies simple explanation
2. A new explanation for evolutionary changes in genetic sex-determination systems
3. Unclear regulations obstacle to biological diversity
4. Musicians have biological advantage in identifying emotion in sound
5. Biological control of tropical weeds using arthropods
6. Study finds most wars occur in Earths richest biological regions
7. Argonne scientists discover possible mechanism for creating handedness in biological molecules
8. Animal and biological science highlights: San Antonio Fluid Dynamics Conference, Nov. 23-25
9. GEN reports on novel tools for deciphering biological networks
10. Argonne scientists peer into heart of compound that may detect chemical, biological weapons
11. Biological sand filters, a practical approach to combat poverty and inequality
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/22/2014)... of Yale researchers will lead a five-year, $3 million ... events is affecting the transport of dissolved organic matter ... say could alter the chemical composition and water quality ... funding from the National Science Foundation,s MacroSystems Biology program, ... the watershed, which begins in Canada and runs through ...
(Date:4/22/2014)... fist-like club of a mantis shrimp, a team of ... with University of Southern California and Purdue University, have ... more impact resistant and tougher than the standard used ... of this tiny crustacean, the more we realize its ... day," said David Kisailus, a Kavli Fellow of the ...
(Date:4/22/2014)... The Federation of American Societies for Experimental Biology (FASEB) ... (FY) 2013 highlighting how funding from the National Institutes ... DC, and Puerto Rico. "FASEB is pleased to make ... the significance of NIH to their state," said FASEB ... nation,s leading source for biomedical research funding, investing ...
Breaking Biology News(10 mins):Connecticut River watershed study will assess impacts of extreme rain events 2Connecticut River watershed study will assess impacts of extreme rain events 3Mantis shrimp stronger than airplanes 2Mantis shrimp stronger than airplanes 3
... of children with undiagnosed learning disorders, developmental deficits, and ... challenges, which are explored in detail in a reflective ... a peer-reviewed journal published by Mary Ann Liebert, Inc. ... ahead of print at www.liebertpub.com/gtmb ...
... been extinct for 65 million years, newly published data ... is providing invaluable insights into their paleobiology. Ammonites, shelled ... inhabited the oceans for nearly 350 million years. Specimens ... that covered North America during the Cretaceous Period demonstrate ...
... are investigating a potential new treatment for lung disease that ... is studying how statins, drugs which are commonly used to ... , There is currently no effective treatment for acute ... rates for those who become critically ill and suffer lung ...
Cached Biology News:Unexplained childhood disorders 2New discoveries in North America's Great Plains bring ammonites to life 2New discoveries in North America's Great Plains bring ammonites to life 3Queen's University Belfast lung injury study could save lives in critically ill 2
(Date:1/15/2014)... 15, 2014   Niagara Thermal Products is proud ... BioBlower Technologies LLC ("B3") as the critical thermal component ... from the Army Corps of Engineers.  B3 has developed ... biological contaminants and destroys VOCs and other chemical pollutants, ...
(Date:1/15/2014)... 15, 2014 Cynvenio, a cancer diagnostics ... the genomic analysis of tumor cells in the bloodstream, ... web-based cancer decision support application powered by CollabRx, Inc. ... ClearID™ genomic test, Therapy Finder will provide breast cancer ...
(Date:1/15/2014)... 2014 ­ RedBrick Health , a fast-growing leader ... announces that EmblemHealth , the New ... now providing the RedBrick Compass health assessment, combined with ... of its members. EmblemHealth is among the first health ...
(Date:1/15/2014)... , January 15, 2014 A study has ... on the Formula 1 track could help to tackle the ... Technologies (MAT), Stowhealth (a GP surgery based in Stowmarket) and ... provider Simplyhealth. Telemetry technology, which is inspired by ...
Breaking Biology Technology:Niagara Thermal Products LLC Selected as Critical Supplier for Buffalo BioBlower Air Purification Systems 2Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 2Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 3EmblemHealth Selects RedBrick Health to Power its Next-Generation Health Engagement and Behavior Change System 2EmblemHealth Selects RedBrick Health to Power its Next-Generation Health Engagement and Behavior Change System 3Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 2Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 3Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 4
... Therapies to Address the Underlying Cause of Cystic,Fibrosis; ... SOUTH PLAINFIELD, N.J., Aug. 20 New ... that the investigational oral drug,PTC124 demonstrates activity in ... with PTC124 results in statistically significant,improvements in the ...
... Oncothyreon Inc. (Nasdaq:,ONTY) (TSX: ONY) announced today that ... on August 14, 2008 indicating that Oncothyreon does ... The NASDAQ Global Market,because it does not meet ... (i) the market value of Oncothyreon,s common stock ...
... Crystal Research Associates, LLC,announced today that ... on Generex Biotechnology Corporation (Nasdaq: GNBT ... at http://www.crystalra.com ., Generex Biotechnology ... pharmaceutical company that aims to research, develop, ...
Cached Biology Technology:PTC124 Shows Promising Activity in Cystic Fibrosis; Phase 2 Proof-of-Concept Data Published in the Lancet 2PTC124 Shows Promising Activity in Cystic Fibrosis; Phase 2 Proof-of-Concept Data Published in the Lancet 3PTC124 Shows Promising Activity in Cystic Fibrosis; Phase 2 Proof-of-Concept Data Published in the Lancet 4PTC124 Shows Promising Activity in Cystic Fibrosis; Phase 2 Proof-of-Concept Data Published in the Lancet 5Oncothyreon announces receipt of notice of non-compliance with market value of listed securities standard for listing on The NASDAQ Global Market 2Oncothyreon announces receipt of notice of non-compliance with market value of listed securities standard for listing on The NASDAQ Global Market 3Crystal Research Associates, LLC Issues Executive Informational Overview(R) (EIO(R)) on Generex Biotechnology Corporation 2Crystal Research Associates, LLC Issues Executive Informational Overview(R) (EIO(R)) on Generex Biotechnology Corporation 3