Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

World's longest-running plant monitoring program now digitized

30.04.2013
Researchers at the University of Arizona's Tumamoc Hill have digitized 106 years of growth data on individual plants, making the information available for study by people all over the world.

Knowing how plants respond to changing conditions over many decades provides new insights into how ecosystems behave.

The permanent research plots on Tumamoc Hill represent the world's longest-running study that monitors individual plants, said co-author Larry Venable, director of research at Tumamoc Hill.

Some of the plots date from 1906 -- and the birth, growth and death of the individual plants on those plots have been periodically recorded ever since.

The century-long searchable archive is unique and invaluable, said Venable, a UA professor of ecology and evolutionary biology who has been studying plants on Tumamoc since 1982.

"You can see the ebb and flow of climate, and you can see the ebb and flow of vegetation," he said.

Lead author Susana Rodriguez-Buritica said, "Long-term data sets have a special place in ecology."

The records have allowed scientists to estimate life spans for desert perennials, some of which are very long-lived, Venable said.

In addition, data from the plots on Tumamoc Hill reveal changes in the Sonoran Desert and have been important to key advances in the science of ecology.

For example, the Tumamoc plant censuses helped overturn the long-standing idea that plant communities progress through a series of steps to a stable collection of species known as a climax community.

"The desert wasn't progressing toward a climax community," he said. Instead of being in synch, each species and plot was changing to its own rhythm.

Rodriguez-Buritica, a postdoctoral research associate in the UA department of ecology and evolutionary biology, Venable and their co-authors Helen Raichle and Robert H. Webb of the U.S. Geological Survey and Raymond M. Turner, formerly of USGS, have published a description of their data in the Ecological Society of America's journal Ecology and archived the data set with the society at http://www.esapubs.org/archive/ecol/E094/083/.

The title of their paper is, "One hundred and six years of population and community dynamics of Sonoran Desert Laboratory perennials." The National Science Foundation, the USGS and the U.S. National Park Service funded the archiving.

Landmark research on the physiology and ecology of desert plants has been conducted on Tumamoc Hill ever since the Carnegie Institution of Washington established the Desert Laboratory there in 1903 to study how plants cope with living in the desert.

The first permanent plots, generally 33 feet by 33 feet (10 meters by 10 meters), were established in 1906 by Volney Spalding; nine of his original plots remain to this day. Additional plots were established by Forrest Shreve in the 1910s and 1920s. Two more plots were added in 2010. Currently, there are 21 plots.

For every perennial plant within each plot, the ecologists recorded the species, the area the plant covered and its location. Even seedlings were identified and mapped.

In addition to the written records, repeated photographs of the plots have been taken since 1906. Those photographs are in the Desert Laboratory Collection of Repeat Photography at the USGS in Tucson, Ariz.

Over the years, botanists and ecologists have helped census and re-census the plots. Co-author Turner took over the work when he came to the UA as a botany professor in 1957, continued while a botanist for USGS and continues to do in retirement. In 1993, co-author Webb took up the project and is keeping the censuses going.

Sorting through data recorded from 2012 back to 1906 was a huge challenge, said Rodriguez-Buritica. She had something to build on: Janice Bowers of USGS had begun to archive the records but retired before finishing. Initially, Rodriguez-Buritica and Venable thought a year would do it – but the task ended up taking much longer.

The records were in several places – some at the library or in storage at Tumamoc and some in the UA library's Special Collections.

One of the challenges Rodriguez-Buritica faced is that methods of collecting and recording information about plants have changed over time.

Spalding, who established the very first plots in 1906, worked long before the age of computers – he recorded his observations in a small notebook. Ecologists continued to record their field observations in paper notebooks and created maps on graph paper well into the latter part of the 20th century.

All those paper records had to be digitized.

Only in the last 20 years have scientists been pinpointing plant locations and other observations directly onto a map within their computers by using GPS and GIS technology.

Upon reviewing and checking the data, Rodriguez-Buritica realized that she needed to standardize the information collected over a century so that other scientists could analyze it. Her expertise in applied statistics and spatial ecology was perfect for the job.

She also computerized the series of maps created over time so new investigators could see all the plant location maps created since 1906.

By putting all the information into a standardized digital format and making it easily accessible on the Web, Rodriguez-Buritica, Venable and their colleagues have ensured that other researchers can build on and expand this unique data set.

Tumamoc Hill is one of the birthplaces of plant ecology, Venable said.

"In the first half of the 20th century, all the great plant ecologists either worked here or came though here," he said. "Plant ecologists from the Desert Lab were key in founding the Ecological Society of America and its flagship journal, Ecology. It is satisfying to see the project come full circle and be permanently archived 100 years later by the journal that these researchers started."

The Desert Lab and Tumamoc Hill have been designated as a National Environmental Study Site, a National Historic Landmark, an Arizona State Scientific and Educational Natural Area and are on the National Register of Historic Places.

Researcher contacts:
Susana Rodriguez-Buritica
Department of Ecology and Evolutionary Biology
susanarburitica@email.arizona.edu
Languages spoken: English, Spanish
Larry Venable
Department of Ecology and Evolutionary Biology
520-621-5956
venable@email.arizona.edu
Languages spoken: English, Spanish, French
Related Web sites:
Larry Venable
http://www.eebweb.arizona.edu/faculty/venable/
Archive of data from the Desert Laboratory Permanent Plots
http://www.esapubs.org/archive/ecol/E094/083/
The Desert Laboratory Repeat Photography Collection
http://www.usgs.gov/science/cite-view.php?cite=2634

Mari N. Jensen | EurekAlert!
Further information:
http://www.arizona.edu

More articles from Ecology, The Environment and Conservation:

nachricht Dune ecosystem modelling
23.06.2017 | Albert-Ludwigs-Universität Freiburg im Breisgau

nachricht Understanding animal social networks can aid wildlife conservation
23.06.2017 | Leibniz-Institut für Gewässerökologie und Binnenfischerei (IGB)

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Quantum thermometer or optical refrigerator?

23.06.2017 | Physics and Astronomy

A 100-year-old physics problem has been solved at EPFL

23.06.2017 | Physics and Astronomy

Equipping form with function

23.06.2017 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>