According to a new analysis of plants in grassland ecosystems around the world, it turns out that most of those plant species are important.
Brian Wilsey, associate professor, and Stanley Harpole, assistant professor, both in Iowa State University’s Department of Ecology, Evolution and Organismal Biology, are authors of a study on plant diversity published in today’s issue of the journal Nature. The study’s lead author, Forest Isbell, is a former graduate student of Wilsey who now works at McGill University, Canada.
Their findings show that most species promoted ecosystem functioning in at least some years, sites and environmental conditions. In all, 84 percent of the grassland species are important to the ecosystem at some point.
“In any single context, only about 27 percent of plant species were seen as important,” he said.
Since previous research had shown that such a small number of plant species were important to ecosystem processes, there was less reason to be concerned if grasslands lost different species and diversity lessened, according to Wilsey.
Now, the value of diversity is very apparent.
The species needed to provide one function during multiple years were not the same as those needed to provide multiple functions within one year, the report said.
“If you look at any one year at one site, you might say that species A or species B are really important,” said Wilsey.
“But what we found was that if you run the analysis over several years, sites or environmental-change contexts, many different species become important. This study really brought everything together.”
Isbell and other authors looked at data from 17 grassland studies around the world, including two done in Iowa’s Loess Hills at the Western Research Farm and another done in Texas by Wilsey’s group.
“Under multiple contexts, many different plant species become really important,” Wilsey added. “For instance, certain plant species are important on east-facing slopes and others are important on west-facing slopes. Some plant species are important on grazing lands because they help grasslands recover quickly. Some plants are vital for nitrogen uptake, which is important because it keeps nitrogen out of water bodies.”
This study may have further value as researchers look to the future.
As climates change, Wilsey said, some plants may become more important because levels of precipitation and atmospheric CO2 change.
“The results suggest that many more species are needed than previously thought for maintaining ecosystem services in a changing world,” he added. “So this study suggests that it is crucial to keep as much diversity as we can.”
Brian Wilsey, Ecology, Evolution and Organismal Biology, 515-294-0232, firstname.lastname@example.org
Brian Wilsey | Newswise Science News
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
20.01.2017 | Awards Funding
20.01.2017 | Materials Sciences
20.01.2017 | Life Sciences