Navigation Links
Millipede border control better than ours
Date:12/23/2011

A mysterious line where two millipede species meet has been mapped in northwest Tasmania, Australia. Both species are common in their respective ranges, but the two millipedes cross very little into each other's territory. The 'mixing zone' where they meet is about 230 km long and less than 100 m wide where carefully studied.

The mapping was done over a two-year period by Dr Bob Mesibov, who is a millipede specialist and a research associate at the Queen Victoria Museum and Art Gallery in Launceston, Tasmania. His results have been published in the open access journal ZooKeys.

'I have no idea why the line is so sharp', said Dr Mesibov. 'The boundary runs up and down hills, crosses rivers and different bedrocks and soils, and ignores vegetation type and climate differences. Its position and its sharpness seem to be the result of an unexplained biological arrangement between the two millipede species.'

Biogeographers use the term 'parapatry' for the case where two species ranges meet but do not overlap, or overlap very little. Dr Mesibov said that parapatry has been reported before in other species of millipedes and in other terrestrial invertebrate animals, in Tasmania and elsewhere in the world. However, parapatric boundaries often parallel a geographical feature, such as a ridgeline, or a steep rainfall gradient.

'There does not seem to be an ecological or a geographic explanation for this particular boundary, or for any part of it. It is also longer than any other parapatric boundary I know about. At 230 km, it is 50% longer than the boundary between England and Scotland, and the 'border control' is a lot better than what we humans can do.'

The two millipede species, Tasmaniosoma compitale and T. hickmanorum, are in the same genus and thought to be closely related. They were first scientifically described in 2010, by the same author and again in ZooKeys. The parapatric boundary was mapped as a background study for later investigations of speciation in this group of millipedes, and of the mechanism of parapatry.


'/>"/>

Contact: Dr. Bob Mesibov
mesibov@southcom.com.au
Pensoft Publishers
Source:Eurekalert  

Related biology news :

1. Genetic study of cave millipedes reveals isolated populations and ancient divergence between species
2. The secret life of millipedes
3. Atlas of European Millipedes published by Pensoft
4. Customs and Border Protection Opens Pedestrian Border Crossing System in El Paso with Support from Unisys
5. Trees on tundras border are growing faster in a hotter climate
6. La Jolla Institute discovers novel mechanism for preventing infection via bodys mucosal borders
7. ESHRE sets standards for cross-border reproductive care
8. Scientists Without Borders awards $10,000 to solvers of maternal health and nutrition challenge
9. Crossing borders in language science: What bilinguals tell us about mind and brain
10. Cross-border conservation vital to protect birds in a climate-change world
11. Porous China-Myanmar border allowing illegal wildlife trade
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Millipede border control better than ours
(Date:2/14/2017)... -- Wake Forest Baptist Medical Center today announced Julie Ann Freischlag, ... (CEO). Freischlag joins the medical center on May 1 ... who last year announced that he would transition to ... it since 2008.   As CEO, Freischlag ... academic health system, which includes Wake Forest School of ...
(Date:2/13/2017)... 13, 2017 Former 9/11 Commission border counsel ... Janice Kephart of Identity Strategy Partners, LLP, ... Trump,s "Executive Order: Protecting the Nation From Foreign ... "As President Trump,s ,Travel Ban, Executive Order ... essentially banned the travel ban, it is important that ...
(Date:2/9/2017)... LONDON , Feb. 9, 2017 The ... in-depth analysis of the biomass boiler market globally in ... sales of biomass boilers. The market for biomass boilers ... product type, end-user, application, and country/region. The market based ... agriculture & forest residues, biogas & energy crops, urban ...
Breaking Biology News(10 mins):
(Date:2/22/2017)... RESEARCH TRIANGLE PARK, N.C., Feb. 22, 2017  United ... announced its financial results for the fourth quarter ... annual 2016 financial results reflect continued growth as ... $700 million," said Martine Rothblatt, Ph.D., United Therapeutics, ... strengthen our ability to develop and advance our ...
(Date:2/21/2017)... ... February 21, 2017 , ... ... Biopsy System , a fully automated benchtop system for collecting intact circulating tumor ... being launched at the Molecular Medicine Tri Conference (Tri-Con) Annual Meeting 2017 (February ...
(Date:2/21/2017)... ... February 21, 2017 , ... ... -Sciences division, Treximo will pair its $200M operational capacity with its strategic ... project management in areas affecting quality and operational management. With office ...
(Date:2/21/2017)... Feb. 21, 2017  Lexus, a returning partner of the ... official and exclusive automobile partner of the men,s and women,s events ... The 2017 Amgen Tour of California ... some of the best professional cycling teams in the world racing ... The four-day Amgen Breakaway from Heart Disease TM ...
Breaking Biology Technology: