Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Opening a can of worms: serendipitous discovery reveals earthworms more diverse than first thought

13.10.2008
Scientists have found that the UK's common or garden earthworms are far more diverse than previously thought, a discovery with important consequences for agriculture.

BBSRC-funded scientists at Cardiff University, led by Dr Bill Symondson and performed in the laboratory by postdoctoral scientist Dr Andrew King and undergraduate student Ms Amy Tibble, have found that many of the common earthworm species found in gardens and on agricultural land are actually made up of a number of distinct species that may have different roles in food chains and soil structure and ecology.

This discovery was made when efforts to develop better tools to identify earthworm DNA in the guts of slug and worm-eating beetles produced some very unexpected results. The research is published today (10 October 2008) in Molecular Ecology.

Dr Symondson said: "When we were working to find new tools to detect earthworm DNA we started getting results that were not really what we expected to see and that indicated the presence of several new earthworm species. After investigating this further we eventually found that there are significant numbers of what we call 'cryptic species'. These different species live in the same environment and have the same outward appearance, but do not interbreed and have clearly distinct DNA sequences."

"Earthworms play a major role in the agricultural environment because they are involved in many soil processes such as soil turnover, aeration and drainage, and the breakdown and incorporation of organic matter. For this reason, they have often been the subject of research into, for example, ecology and toxicology. It is vitally important that we know exactly which species we are studying, in case they respond differently from one another - to agrochemicals or heavy metals in the soil, for example."

Dr Symondson and his team chose to study nine different species of common earthworm and collected samples from Britain and mainland Europe. They examined the sequence of specific parts of the worms' DNA to establish the evolutionary relationships between individuals from within each species. They began by looking at 71 earthworms representing the nine recognised species and found evidence that four of the nine common earthworm species are actually made up of complexes of multiple species. And furthermore, detailed analysis of one common species - Allolobophora chlorotica - shows that it is made up of at least three species in Britain and one additional species in central Europe.

Dr Symondson continued: "Any further earthworm research will now have to be done with the knowledge that in many cases there are multiple species where we thought there was just one. We need to establish for certain whether the different cryptic species play different roles in the ecology of our agricultural land or have different tolerances to potential environmental stresses such as toxins, parasites, or extremes of temperature."

Steve Visscher, Deputy Chief Executive, BBSRC said: "Maintaining productive agricultural land is an important challenge. It is exciting to see that while investigating one important issue for agriculture Dr Symondson and his team were able to observe another crucial aspect. These researchers didn't set out to find new species of worms but by following up on an unusual observation in their work they have uncovered several new species already. This knowledge will be important for many people researching ways to get the most out of our agricultural land in the future."

| alfa
Further information:
http://www.bbsrc.ac.uk
http://www.bbsrc.ac.uk/media/releases/2008/0809xx_opening_can_worms.html

More articles from Agricultural and Forestry Science:

nachricht Plasma-zapping process could yield trans fat-free soybean oil product
02.12.2016 | Purdue University

nachricht New findings about the deformed wing virus, a major factor in honey bee colony mortality
11.11.2016 | Veterinärmedizinische Universität Wien

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

Im Focus: How to inflate a hardened concrete shell with a weight of 80 t

At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).

Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...

Im Focus: Bacterial Pac Man molecule snaps at sugar

Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.

The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...

Im Focus: Newly proposed reference datasets improve weather satellite data quality

UMD, NOAA collaboration demonstrates suitability of in-orbit datasets for weather satellite calibration

"Traffic and weather, together on the hour!" blasts your local radio station, while your smartphone knows the weather halfway across the world. A network of...

Im Focus: Repairing defects in fiber-reinforced plastics more efficiently

Fiber-reinforced plastics (FRP) are frequently used in the aeronautic and automobile industry. However, the repair of workpieces made of these composite materials is often less profitable than exchanging the part. In order to increase the lifetime of FRP parts and to make them more eco-efficient, the Laser Zentrum Hannover e.V. (LZH) and the Apodius GmbH want to combine a new measuring device for fiber layer orientation with an innovative laser-based repair process.

Defects in FRP pieces may be production or operation-related. Whether or not repair is cost-effective depends on the geometry of the defective area, the tools...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

Nothing will happen without batteries making it happen!

05.01.2017 | Event News

 
Latest News

Multiregional brain on a chip

16.01.2017 | Power and Electrical Engineering

New technology enables 5-D imaging in live animals, humans

16.01.2017 | Information Technology

Researchers develop environmentally friendly soy air filter

16.01.2017 | Power and Electrical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>