Since they began clearing valleys and slopes for agriculture more than 9,000 years ago, and continuing with the construction of roads, buildings and cities, people have been altering landscapes. UVM geologists explore the link between human actions and landscape--and reach some important conclusions--in the cover article of the April/May issue of GSA Today. Produced by the Geological Society of America, the prestigious monthly journal goes to more than 20,000 geologists and libraries worldwide.
Paul Bierman, professor of geology, and colleagues--including three undergraduates--authored the paper, titled "Old Landscape Images Record Landscape Change Through Time." The paper is the result of research collected via UVMs Landscape Change Program, a searchable, web-based community archive of more than 10,000 images of Vermont landscapes from before 1810 to the present. The archive, which is particularly rich in rare images of rural areas, can be accessed online at http://uvm.edu/perkins/landscape. Historical photographs are a powerful tool for examining and understanding the distribution of physical and biological surficial processes over the course of decades and centuries. Such imagery is particularly valuable for understanding human-landscape interaction. The GSA article presents several examples of quantitative, image-based, landscape-scale analyses made using hundreds of different images, each taken at a different place. (Numerous photographs that show the same landscape at two different points in time are also available in the archive. These photographic pairs can be accessed online at http://www.uvm.edu/~pbierman/landscape/.
"Our findings have significant environmental implications for Vermont and New England in general," said Bierman. "We found that erosion is linked to clearing trees from hill slopes, which implies that if New England were cleared of trees sediment would again pour off slopes and into streams and rivers." Also of note, said Bierman, are the condition of riparian zones; corridors running along rivers and streams have improved markedly over the past 30 years. "This is a positive environmental finding and one thats very good for stream health and the health of ecosystems in streams," he said.
Geophysicists and atmospheric scientists partner to track typhoons' seismic footprints
16.02.2018 | Princeton University
NASA finds strongest storms in weakening Tropical Cyclone Sanba
15.02.2018 | NASA/Goddard Space Flight Center
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
19.02.2018 | Materials Sciences
19.02.2018 | Materials Sciences
19.02.2018 | Life Sciences