Organic nitrogen gives new clue to biodiversity

Apr 12, 2006

Scientists have found that organic nitrogen is more important for plant growth than previously thought and could contribute to maintaining diversity in grasslands.

Until recently it was generally believed that the most important source of nitrogen for plants was inorganic nitrogen. However, researchers funded by the Biotechnology and Biological Sciences Research Council (BBSRC) from the University of Lancaster and the Institute of Grassland and Environmental Research (IGER) have found that not only can organic nitrogen be directly taken up by plants it is also used differently by different species, enabling nitrogen sharing and biodiversity.

By tagging organic nitrogen with stable isotopes researchers have challenged the long held idea that organic nitrogen has to be first converted into an inorganic form before the plants can use it. Their findings have significant implications in unfertilised, low-productivity grasslands where organic nitrogen often appears in greater concentrations than inorganic forms.

Professor Richard Bardgett, lead researcher at the University of Lancaster explained: “This research provides important new information about what happens to organic nitrogen in real ecosystems in real time. Tagging amino acids also revealed that different plant species prefer different sources of organic nitrogen. These preferences may be a way for plants and microbes to avoid competition with their neighbours for nitrogen when it is in very short supply, effectively enabling them to share nitrogen and maintain biodiversity.”

Professor Julia Goodfellow, BBSRC Chief Executive, commented: “This is important work which increases our understanding about the underlying processors that generate and maintain biodiversity and will help farmers, industry and government make the most of natural resources and use biodiversity more effectively.”

An interactive exhibition jointly developed by the BBSRC and the National Environmental Research Council (NERC) is touring the UK. Biodiversity: what on earth is it? is currently at the National Museum of Wales until April 23, it then travels to the National Botanic Garden of Wales in May.

Source: Biotechnology and Biological Sciences Research Council (BBSRC)

Explore further: China's reform of R&D budget management doesn't go far enough, research shows

add to favorites email to friend print save as pdf

Related Stories

Changes in farming and climate hurting British moths

23 hours ago

Britain's moths are feeling the pinch – threatened on one side by climate change and on the other by habitat loss and harmful farming methods. A new study gives the most comprehensive picture yet of trends ...

A salty, martian meteorite offers clues to habitability

Aug 28, 2014

Life as we know it requires energy of some sort to survive and thrive. For plants, that source of energy is the Sun. But there are some microbes that can survive using energy from chemical reactions. Some ...

Recommended for you

Precarious work schedules common among younger workers

23 hours ago

One wish many workers may have this Labor Day is for more control and predictability of their work schedules. A new report finds that unpredictability is widespread in many workers' schedules—one reason ...

User comments : 0