Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New maps reveal true extent of human footprint on Earth

06.12.2005


As global populations swell, farmers are cultivating more and more land in a desperate bid to keep pace with the ever-intensifying needs of humans.



As a result, agricultural activity now dominates more than a third of the Earth’s landscape and has emerged as one of the central forces of global environmental change, say scientists at the Center for Sustainability and the Global Environment (SAGE) at the University of Wisconsin-Madison.

Navin Ramankutty, an assistant scientist at SAGE, says, "the real question is: how can we continue to produce food from the land while preventing negative environmental consequences such as deforestation, water pollution and soil erosion?"


To better understand that crucial trade-off, Ramankutty and other SAGE researchers are tracking the changing patterns of agricultural land use around the world, including a look at related factors such as global crop yields and fertilizer use. Distilling that information into computer-generated maps, the scientists will present their early findings during the fall meeting (Dec. 5-9, 2005) of the American Geophysical Union.

"In the act of making these maps we are asking: where is the human footprint on the Earth?" says Amato Evan, a SAGE researcher who merged available census and satellite data to create visuals reflecting the reach of pasture and croplands worldwide. Chad Monfreda, a graduate student at SAGE, is similarly mapping the location, range and yields of over 150 individual crops reared around the planet.

The exercise is already beginning to cast light on some emerging trends. Countries such as Argentina and Brazil, for instance, have increasingly cleared forests to grow soybean, a legume that has never been a traditional crop of Latin America. Scientists say the surge in soybean production there has a lot to do with the booming demand for soy all the way at the other end of the world - in China. Meanwhile, Monfreda notes, long-time soybean farmers in the U.S. - the world’s top soybean producer - are growing increasingly insecure about their place in the global market.

But scientists risk missing important regional and local trends by taking only a global approach to land use change. "There is still a large ’disconnect’ between global, top-down views of changing planetary conditions, and the local, bottom-up perspective of how humans affect and live in a changing environment," says Jonathan Foley, director of SAGE.

To help bridge that gap, SAGE researchers are working towards a new "Earth Collaboratory," an unprecedented Internet-based data bank that would simultaneously draw on the knowledge of global scientists, local environmentalists and everyday citizens. Adds Foley: "[The Collaboratory] will truly be a brave new experiment that effectively bridges science, decision-making and real-world environmental practice - collectively envisioning a new way to live sustainably."

Navin Ramankutty | EurekAlert!
Further information:
http://www.wisc.edu

More articles from Ecology, The Environment and Conservation:

nachricht Dry landscapes can increase disease transmission
20.06.2018 | Forschungsverbund Berlin e.V.

nachricht 100 % Organic Farming in Bhutan – a Realistic Target?
15.06.2018 | Humboldt-Universität zu Berlin

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: Temperature-controlled fiber-optic light source with liquid core

In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.

Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...

Im Focus: Overdosing on Calcium

Nano crystals impact stem cell fate during bone formation

Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...

Im Focus: AchemAsia 2019 will take place in Shanghai

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...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

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.

Im Focus: Sharp images with flexible fibers

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...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

Graphene assembled film shows higher thermal conductivity than graphite film

22.06.2018 | Materials Sciences

Fast rising bedrock below West Antarctica reveals an extremely fluid Earth mantle

22.06.2018 | Earth Sciences

Zebrafish's near 360 degree UV-vision knocks stripes off Google Street View

22.06.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>