By studying how plants in three hyper-diverse grasslands change annually over a decade, ecologists Jason Fridley (University of North Carolina, Chapel Hill), Robert Peet (University of North Carolina, Chapel Hill), Eddy van der Maarel (University of Groningen), and Jo Willems (Utrecht University) show how one crucial property of ecosystems--the species-area curve, describing the relation of area and number of species--cannot be fully understood unless annual changes in the species composition of local communities are taken into account.
Reporting in The American Naturalist, Fridley and colleagues demonstrate, for the first time, that "local" species-area curves (those confined to one community) and those of large regions can be linked if one considers that the species composition of small areas changes faster than that of larger areas.
"It is increasingly clear," says Fridley, "that plant communities are dynamic entities in which variation in space and time are inextricably linked."
Indeed, ecologists have argued for decades over why species-area curves measured locally do not seem to match predictions derived from larger areas. This study shows that smaller surveys are heavily constrained by the poor sample size of individuals in any given year. Over time, as individuals die and are replaced by others from the surrounding area, the sample size increases and the community begins to more resemble its region--but in a manner that strictly follows the region's species-area curve.
This novel connection of local and regional biodiversity patterns extends the generality of the species-area relationship to very small areas, and thus allows ecologists to explicitly link processes that drive biodiversity across scales.
Suzanne Wu | EurekAlert!
Global threat to primates concerns us all
19.01.2017 | Deutsches Primatenzentrum GmbH - Leibniz-Institut für Primatenforschung
Reducing household waste with less energy
18.01.2017 | FIZ Karlsruhe – Leibniz-Institut für Informationsinfrastruktur GmbH
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
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...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
19.01.2017 | Earth Sciences
19.01.2017 | Life Sciences
19.01.2017 | Physics and Astronomy