"Under today's conditions, grasses flower early in the growing season and wildflowers flower later, but when we increased the concentration of carbon dioxide to mirror conditions 50 years from now, these two groups flowered at the same time," said Elsa Cleland, lead author with the Jasper Ridge Global Change Experiment at Stanford University and the Carnegie Institution's Department of Global Ecology.* The results are published in the on-line early edition (September 4-8) of the Proceedings of the National Academy of Sciences.**
In recent decades, scientists have observed accelerated springtime phenology--the timing of developmental activity in many plant and animal species--and assumed it is a response to global warming. The Jasper Ridge researchers wanted to know if phenology responded similarly to other important aspects of global change, such as increasing atmospheric CO2 concentrations, altered rainfall patterns, and increased nitrogen deposition.
While the researchers found that experimental warming accelerated springtime flowering of all species, they were surprised to find differing responses to elevated CO2 and nitrogen deposition, both alone and in combination. For each of these factors, wildflowers responded by flowering earlier, while the grasses flowered later. Because grasses dominate this ecosystem, the scientists found that the overall timing of plant growth was delayed under elevated CO2.
"This research shows that global warming is just part of the picture," said Christopher Field, director of the project. "It highlights the fact that opposing responses of different species to global changes may cause us to underestimate the degree to which natural communities are already responding to changing environmental conditions."
Elsa Cleland | EurekAlert!
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05.06.2018 | Leibniz-Institut für Gewässerökologie und Binnenfischerei (IGB)
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...
Light detection and control lies at the heart of many modern device applications, such as smartphone cameras. Using graphene as a light-sensitive material for...
Water molecules exist in two different forms with almost identical physical properties. For the first time, researchers have succeeded in separating the two forms to show that they can exhibit different chemical reactivities. These results were reported by researchers from the University of Basel and their colleagues in Hamburg in the scientific journal Nature Communications.
From a chemical perspective, water is a molecule in which a single oxygen atom is linked to two hydrogen atoms. It is less well known that water exists in two...
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