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
Dispersal of Fish Eggs by Water Birds – Just a Myth?
19.02.2018 | Universität Basel
Removing fossil fuel subsidies will not reduce CO2 emissions as much as hoped
08.02.2018 | International Institute for Applied Systems Analysis (IIASA)
Animal photoreceptors capture light with photopigments. Researchers from the University of Göttingen have now discovered that these photopigments fulfill an...
On 15 March, the AWI research aeroplane Polar 5 will depart for Greenland. Concentrating on the furthest northeast region of the island, an international team...
The world’s second-largest ice shelf was the destination for a Polarstern expedition that ended in Punta Arenas, Chile on 14th March 2018. Oceanographers from...
At the 2018 ILA Berlin Air Show from April 25–29, the Fraunhofer Institute for Laser Technology ILT is showcasing extreme high-speed Laser Material Deposition (EHLA): A video documents how for metal components that are highly loaded, EHLA has already proved itself as an alternative to hard chrome plating, which is now allowed only under special conditions.
When the EU restricted the use of hexavalent chromium compounds to special applications requiring authorization, the move prompted a rethink in the surface...
At the ILA Berlin, hall 4, booth 202, Fraunhofer FHR will present two radar sensors for navigation support of drones. The sensors are valuable components in the implementation of autonomous flying drones: they function as obstacle detectors to prevent collisions. Radar sensors also operate reliably in restricted visibility, e.g. in foggy or dusty conditions. Due to their ability to measure distances with high precision, the radar sensors can also be used as altimeters when other sources of information such as barometers or GPS are not available or cannot operate optimally.
Drones play an increasingly important role in the area of logistics and services. Well-known logistic companies place great hope in these compact, aerial...
16.03.2018 | Event News
13.03.2018 | Event News
08.03.2018 | Event News
16.03.2018 | Earth Sciences
16.03.2018 | Physics and Astronomy
16.03.2018 | Life Sciences