Although the tropics appear to the casual observer to be busily buzzing and blooming with life's rich variety when compared with temperate and polar regions—a fact that scientists have thoroughly documented—the distribution of species in space and time actually varies around the globe in surprising and subtle ways. So explains Janne Soininen of the University of Helsinki in an article published in the June 2010 issue of BioScience.
Soininen explores a number of recent studies on the topic, synthesizing conclusions from thousands of observations. The studies focus on how the proportion of species that are present in both of two samples varies depending on the distance separating the sites where the samples were taken, or with the time separating two samplings of the species present at one place. Many such studies indicate that, as expected, the species mix turns over more in the tropics than closer to the poles. But it turns out that this is true only for studies that look at small areas—roughly, a square kilometer or less—or at periods of less than about a year. Studies that look at very large areas, or at multi-year changes, often find the opposite effect: turnover of species is higher close to the poles than in the tropics. Soininen suggests that changes in climate over large distances and over multi-year periods explain these paradoxical trends. Moreover, the data Soininen surveys imply that species turnover does not change in a straightforward way over distance and time, perhaps because of different interactions between the species that make up different ecosystems. Soininen suggests further studies to clarify these effects. Such work could shed light on the fundamental processes that assemble ecosystems.
By noon EST on 1 June 2010 and until early July, the full text of the article will be available for free download through the copy of this press release available at www.aibs.org/BioScience-press-releases/.
BioScience, published 11 times per year, is the journal of the American Institute of Biological Sciences (AIBS). BioScience publishes commentary and peer-reviewed articles covering a wide range of biological fields, with a focus on "Organisms from Molecules to the Environment." The journal has been published since 1964. AIBS is an umbrella organization for professional scientific societies and organizations that are involved with biology. It represents some 200 member societies and organizations with a combined membership of about 250,000.
The complete list of peer-reviewed articles in the June 2010 issue of BioScience is as follows:
A Phylogenomic Perspective on the New Era of Ichthyology by Wei-Jen Chen and Richard L. Mayden
Species Turnover along Abiotic and Biotic Gradients: Patterns in Space Equal Patterns in Time? by Janne Soininen
Using Landscape Limnology to Classify Freshwater Ecosystems for Multi-ecosystem Management and Conservation by Patricia A. Soranno, Kendra Spence Cheruvelil, Katherine E. Webster, Mary T. Bremigan, Tyler Wagner, and Craig A. Stow
Not So Fast: Inflation in Impact Factors Contributes to Apparent Improvements in Journal Quality by Bryan D. Neff and Julian D. Olden
Wildfire and Management of Forests and Native Fishes: Conflict or Opportunity for Convergent Solutions? by Bruce E. Rieman, Paul F. Hessburg, Charles Luce, and Matthew R. Dare
Jennifer Williams | EurekAlert!
Symbiotic bacteria: from hitchhiker to beetle bodyguard
28.04.2017 | Johannes Gutenberg-Universität Mainz
Nose2Brain – Better Therapy for Multiple Sclerosis
28.04.2017 | Fraunhofer-Institut für Grenzflächen- und Bioverfahrenstechnik IGB
More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...
Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...
The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
28.04.2017 | Event News
20.04.2017 | Event News
18.04.2017 | Event News
28.04.2017 | Medical Engineering
28.04.2017 | Earth Sciences
28.04.2017 | Life Sciences