Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New global bird map suggests ’hotspots’ not a simple key to conservation

18.08.2005


The first full map of where the world’s birds live reveals their diversity ’hotspots’ and will help to focus conservation efforts, according to research published in Nature today (18 August).



The findings are drawn from the most complete and detailed picture of bird diversity yet made, based on a new global database of all living bird species.

The map also shows that the pattern of bird diversity is much more complicated than previously thought.


The researchers conclude that different types of ’hotspot’ - the most bird-rich locations on the planet -- do not share the same geographic distribution, a finding with deep implications in both ecology and conservation.

For birds, hotspots of species richness are the mountains of South America and Africa, whereas hotspots of extinction risk are on the islands of Madagascar, New Zealand and the Philippines.

"In the past people thought that all types of biodiversity showed the same sort of pattern, but that was based on small-scale analyses," says senior author Professor Ian Owens of Imperial College London. "Our new global analyses show that different sorts of diversity occur in very different places."

Biodiversity hotspots have a high profile in conservation, but are controversial as their underlying assumptions remain untested. The key assumption is that areas ’hot’ for one aspect of diversity will also be hot for other aspects.

Their analyses now show that surprisingly, this is not the case - different types of hotspot are in fact located in different areas.

"Different types of diversity don’t map in the same way," Prof Owens says. "There is no single explanation for the patterns. Different mechanisms are therefore responsible for different aspects of biodiversity, and this points to the need to base conservation strategy on the use of more than one measure of biodiversity."

The team mapped three different measures of diversity for the study: species richness, threatened species richness (as assessed by their extinction risk), and endemic species richness (birds with a small breeding range). Only the Andes in South America contains bird hotspots under all three measures.

To understand the mechanisms behind large scale biodiversity patterns, the researchers first had to construct global maps before delving into them.

"The prior bits of work were horribly dispersed: in paper maps on expert’s desks, or in very old books and the heads of aging experts who had originally surveyed the areas," said Professor Owens.

It took five person years to get the data into a digital mapping format known as a ’GIS system’. This database was then used to score the presence or absence of each of the nearly 10,000 different bird species in a grid covering the world’s land area. Each of the 20,000 cells in the grid is 100 km squared and contains an area similar to that of Cyprus.

"We hope that birds are a model for this type of work," said Professor Owens. "There is such a wealth of historical information about them. They are also large, colourful and you can see them in the day time. It’s very difficult to do at this scale for other organisms."

Tony Stephenson | EurekAlert!
Further information:
http://www.imperial.ac.uk

More articles from Ecology, The Environment and Conservation:

nachricht Bioinvasion on the rise
15.02.2017 | Universität Konstanz

nachricht Litter Levels in the Depths of the Arctic are On the Rise
10.02.2017 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

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

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Stingless bees have their nests protected by soldiers

24.02.2017 | Life Sciences

New risk factors for anxiety disorders

24.02.2017 | Life Sciences

MWC 2017: 5G Capital Berlin

24.02.2017 | Trade Fair News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>