Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Plant diversity has ’luxury’ effect, say scientists

27.06.2003


Biodiversity in urban/suburban yards correlates with household income



Biodiversity in urban and suburban yards directly correlates with household income, scientists have found.

Researchers at the National Science Foundation (NSF)-funded Central Arizona-Phoenix Long-Term Ecological Research (LTER) site found higher plant diversity in "upscale" neighborhoods. "The line flattens out, however, at about the $50,000 per year salary mark," said scientist Charles Redman. "When investigating urban systems, we must re-conceptualize biodiversity in terms of human choice, and in terms of how choices are made, and why."


These findings, published in this week’s on-line issue of the journal Proceedings of the National Academy of Sciences, "are a result of analysis of baseline data gathered in the LTER site’s 200-point survey, a major survey undertaken to measure ecological characteristics of the Central Arizona-Phoenix area, provide a baseline for future monitoring, and give an overview of features such as plant diversity, soil chemistry, and animal distributions," explained NSF’s Henry Gholz, LTER program director.

For the research, the entire study area (some 6,400 square kilometers) was covered with a five-by-five-kilometer grid. Field measurements were done in 30-by-30-meter survey plots, and included identifying all native and exotic plants; mapping the area of surface cover; collecting samples of soils, insects, microbes and pollen; and taking photos from the center of each plot.

Since this survey, which was conducted in the spring of 2000, scientists have monitored bird abundance and diversity, along with human activity, at 40 of the 200-plus sites, four times a year.

The resulting data is intended to provide a comprehensive picture of ecological characteristics of the Phoenix metro area and surrounding agricultural and desert lands, at a single point in time. However, the sites will be resurveyed every five years to monitor how these variables are changing with continued development, according to scientist Diane Hope, director of the field study. "Another use of the data is to compare features such as plant diversity and soil nutrient status in the city, and in the outlying desert," said Hope. "For example, preliminary analyses show that total plant diversity in the desert becomes greater as the elevation of the site increases, but in the city resource abundance (wealth) is the key factor."

Human geographic and socioeconomic variables are important factors in explaining spatial patterns in plant diversity and soil-nutrient status, the scientists found. In general, average plant diversity was similar between desert and urban sites, although the total number of plant genera and the variation in composition from site to site was higher in the urban landscape. Interestingly, said Hope, "median family income, age of residential housing and whether a site has ever been farmed are all correlated with plant diversity. Wealthier, younger neighborhoods and those on sites that have never been cultivated tend to have a greater number of perennial plant types."

In a separate study focusing on parks located in neighborhoods of differing socioeconomic status, bird diversity was also found to be greater in the higher income residential areas.


NSF Program Officer: Henry Gholz, 703-292-8481, hgholz@nsf.gov
Lead Scientist: Diane Hope, diane.hope@asu.edu .

NSF is an independent federal agency that supports fundamental research and education across all fields of science and engineering, with an annual budget of nearly $5 billion. NSF funds reach all 50 states through grants to nearly 2,000 universities and institutions. Each year, NSF receives about 30,000 competitive requests for funding, and makes about 10,000 new funding awards. NSF also awards over $200 million in professional and service contracts yearly.

Receive official NSF news electronically through the e-mail delivery system, NSFnews. To subscribe, send an e-mail message to join-nsfnews@lists.nsf.gov. In the body of the message, type "subscribe nsfnews" and then type your name. (Ex.: "subscribe nsfnews John Smith")

Cheryl Dybas | National Science Foundation
Further information:
http://www.nsf.gov

More articles from Studies and Analyses:

nachricht Multi-year study finds 'hotspots' of ammonia over world's major agricultural areas
17.03.2017 | University of Maryland

nachricht Diabetes Drug May Improve Bone Fat-induced Defects of Fracture Healing
17.03.2017 | Deutsches Institut für Ernährungsforschung Potsdam-Rehbrücke

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

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

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

When Air is in Short Supply - Shedding light on plant stress reactions when oxygen runs short

23.03.2017 | Life Sciences

Researchers use light to remotely control curvature of plastics

23.03.2017 | Power and Electrical Engineering

Sea ice extent sinks to record lows at both poles

23.03.2017 | Earth Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>