Navigation Links
Habitat microstructure drives salamander metamorphosis

Whether salamanders transform into their terrestrial, adult form or retain their aquatic, juvenile form depends on the nature of the streambed where they develop.

A study published today in the open access journal BMC Biology reveals that the Oklahoma salamander Eurycea tynerensis metamorphoses into a more terrestrial adult form in streambeds composed of fine, tightly packed gravel but retains its juvenile, or paedomorphic, form in streambeds made of large, loosely packed particles. This study highlights how a simple difference in habitat microstructure can have a major influence on patterns of development, morphology and evolution.

Ronald Bonett and Paul Chippindale from the University of Texas at Arlington, Texas, USA, analysed the type, size and degree of sorting of streambed sediments for 22 populations, 11 paedomorphic and 11 metamorphic, of the plethodontid salamander E. tynerensis living on the Ozark Plateau in south-central North America.

Bonett and Chippindale's results show that paedomorphic salamanders prevailed in streambeds made of large well-sorted gravel, whereas metamorphic salamanders were found where streambeds consisted of small, unsorted sediments. The authors found a strong negative correlation between small streambed sediments and paedomorphosis.

Bonett and Chippindale explain that large gravel creates porous streambeds with large spaces between particles, where aquatic paedomorphic salamanders can access sub-surface water during dry months. However, if these spaces are filled in by small particles, metamorphosis is the only way they can survive when surface streams dry-up.


'"/>

Source:BioMed Central


Page: 1

Related biology news :

1. Habitat use by North Pacific right whales, Eubalaena japonica, in the Bering Sea and Gulf of Alaska
2. Unchecked DNA replication drives earliest steps toward cancer
3. Climate change drives widespread amphibian extinctions
4. Mindless autopilot drives people to underestimate food decisions
5. Buildup of damaged DNA in cells drives aging
6. A genetic gang of 4 drives spread of breast cancer
7. Discovery of an American salamander where it shouldnt be: Korea
8. Elusive salamanders have role in developing new sampling models
9. Butterflies lose body fat during metamorphosis
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:1/4/2017)... VEGAS , Jan. 4, 2017  CES ... performance biometric sensor technology, today announced the launch ... sensor systems, the highly-accurate biometric sensor modules ... biometric technology, experience and expertise. The two ... Benchmark designed specifically for hearables, and Benchmark BW2.0, ...
(Date:12/22/2016)... December 22, 2016 SuperCom (NASDAQ: ... solutions for the e-Government, Public Safety, HealthCare, and Finance sectors announced ... has been selected to implement and deploy a community-based supportive services ... Northern California , further expanding its presence in the state. ... This new program, ...
(Date:12/19/2016)... TORONTO , 19 de diciembre de 2016  Mosaic Biomedicals ... el desarrollo acelerado de MSC-1, un anticuerpo humanizado que se espera ... en 2017, con múltiples sitios previstos a lo largo de Europa ... MSC-1 ... factor inhibidor de leucemia (LIF), una citoquina pleiotrópica que se sobreexpresa ...
Breaking Biology News(10 mins):
(Date:1/11/2017)... AURORA, Colo. (PRWEB) , ... January 11, 2017 ... ... in the journal Clinical Cancer Research show early promise of the investigational anti-cancer ... progressed despite a median 5 previous treatment regimens. Twenty-seven percent of these heavily ...
(Date:1/11/2017)... ... 11, 2017 , ... With sepsis claiming approximately 500,000 lives ... billion, healthcare systems are looking to provide better and faster care to ... are bacteria and the yeast pathogen Candida, which can lead to severe complications ...
(Date:1/11/2017)... Colorado (PRWEB) , ... January 11, 2017 , ... ... dynamic aqueous plasma technology platforms, announced today that the National Science Foundation (NSF) ... supplement for $500,000. The funds will be used to commercialize the Symbios Tubular ...
(Date:1/11/2017)... GAITHERSBURG, Md. , Jan. 11, 2017 /PRNewswire/ ... clinical-stage gene delivery company, announced today that its ... will present a talk entitled  "AdenoVerse™ platform for ... during the Biotech Showcase at the upcoming Phacilitate ... Miami , Florida.  Dr. Brough,s ...
Breaking Biology Technology: